Overflow device and waste gas treatment equipment

Abstract

The utility model provides an overflow device and waste gas treatment equipment, which relate to the technical field of semiconductor waste gas treatment. The overflow device includes a cavity, an overflow conduit and an overflow protective tube. The overflow conduit is connected to the cavity. The inlet end of the overflow conduit is located in the cavity and is higher than the bottom of the cavity to form an overflow trough in the cavity. The overflow protective tube is sleeved in the overflow conduit and protrudes from the inlet end of the overflow conduit. A gap is left between the overflow protective tube and the overflow conduit. By setting the above-mentioned overflow protective tube, a gap is formed between the overflow conduit and the overflow protective tube, which is used to screen large particles in the liquid, and can effectively prevent large particles from flowing into the overflow conduit with the liquid, thereby achieving preliminary solid-liquid separation.

Description

Technical Field

[0001] The utility model relates to the technical field of semiconductor waste gas treatment, and in particular to an overflow device and waste gas treatment equipment. Background Art

[0002] Overflow devices play an important role in waste treatment equipment. When the liquid or solid in the waste gas treatment equipment reaches a certain height, they will flow out of the overflow device. The overflow device can prevent excessive accumulation or pressure increase of liquid or solid inside the waste gas treatment equipment.

[0003] However, most of the current overflow devices have simple structures, and particles of different sizes are easily introduced into the overflow conduit. These larger particles are easy to block the overflow conduit, resulting in unsatisfactory equipment treatment efficiency. Or these larger particles fall into the next process through the overflow device, affecting the subsequent exhaust gas treatment efficiency. Utility Model Content

[0004] The utility model provides an overflow device and waste gas treatment equipment, which can screen particulate matter, prevent large particles from falling in, and preliminarily play a role of solid-liquid separation to improve the waste gas treatment efficiency.

[0005] The embodiments of the present invention can be implemented as follows:

[0006] The embodiment of the utility model provides an overflow device, which includes:

[0007] Cavity;

[0008] an overflow conduit, the overflow conduit being in communication with the cavity; an inlet end of the overflow conduit being located in the cavity and higher than the bottom of the cavity to form an overflow trough in the cavity;

[0009] The overflow protective tube is sleeved in the overflow conduit and protrudes from the inlet end of the overflow conduit, and a gap is left between the overflow protective tube and the overflow conduit.

[0010] In the above embodiment, by setting the inlet end of the overflow conduit higher than the bottom of the cavity, an overflow trough is formed in the cavity, so that large particles can be deposited in the overflow trough. In addition, an overflow protective tube is sleeved in the overflow conduit, which can increase the height of the overflow conduit so that more large particles can be deposited. Moreover, since there is a gap between the overflow protective tube and the overflow conduit, some particles may be stuck in the gap and cannot flow into the overflow conduit with the impact of the water flow. The gap can screen particles of some diameters, prevent some larger particles from clogging the overflow conduit, and achieve preliminary solid-liquid separation.

[0011] In an optional embodiment, the overflow device further comprises a protective pipe bracket, wherein the protective pipe bracket is fixedly connected to the overflow protective pipe, and the protective pipe bracket is detachably connected to the overflow conduit.

[0012] In the above embodiment, the protection pipe bracket can increase the structural strength of the overflow protection pipe and facilitate installation. The protection pipe bracket and the overflow conduit are connected in a detachable manner, which can facilitate replacement of the overflow protection pipe.

[0013] In an optional embodiment, the protective tube bracket is welded to the overflow protective tube, and the protective tube bracket is clamped to the overflow conduit. The protective tube bracket is welded to the overflow protective tube, and the protective tube bracket is connected to the overflow conduit by a clamping connection method, so that the overflow conduit can be separated from the protective tube bracket more quickly and conveniently. When the protective tube bracket is pulled out, the overflow protective tube can also be taken out, so as to improve the efficiency of replacing the overflow protective tube.

[0014] In an optional embodiment, the number of the protective pipe brackets is multiple, and the multiple protective pipe brackets are evenly arranged on the side wall of the overflow protective pipe along the circumferential direction. By providing multiple protective pipe brackets, the overflow protective pipe can be better connected to the overflow conduit, and it is also convenient for workers to take and replace the overflow protective pipe.

[0015] In an optional embodiment, the cavity includes an inner cavity and an outer cavity, and a first washing water inlet is provided on a side wall of the outer cavity;

[0016] The inner cavity is arranged in the outer cavity, and a first chamber is formed between the inner cavity and the outer cavity, and the first chamber is connected to the first washing water inlet; a second chamber is formed in the inner cavity, and an overflow port connected to the first chamber is formed at the top of the inner cavity, and the overflow port is used to guide the liquid overflowing from the first chamber to flow through the inner wall of the inner cavity; the overflow conduit is connected to the inner cavity.

[0017] In the above embodiment, two chambers, namely the first chamber and the second chamber, are formed by providing an inner cavity and an outer cavity. An overflow port connected to the first chamber is formed at the top of the inner cavity, and the overflow port is used to guide the liquid overflowing from the first chamber to flow through the inner wall of the inner cavity. Washing water is injected from the first chamber. After the washing water fills the first chamber, it will flow into the second chamber along the wall of the inner cavity to clean the wall of the inner cavity, so that the wall of the inner cavity is not easy to adhere to particles or scale. Through this dual-chamber design, the overflow device can be easily cleaned, and the inner wall of the cavity of the overflow device is not easily corroded, which extends the service life of the overflow device.

[0018] In an optional embodiment, there are multiple first washing water inlets, and the multiple first washing water inlets are arranged at intervals on the outer cavity, and the multiple first washing water inlets are all connected to the first chamber.

[0019] In the above embodiment, by providing a plurality of first washing water inlets, the fluidity of water can be increased and the cleaning efficiency can be improved.

[0020] In an optional embodiment, a washing water drain port is provided at the bottom of the inner cavity.

[0021] In the above embodiment, by providing a washing water drain port, the particles or deposited sludge at the bottom of the cavity can be washed out to reduce the blockage of particles. The waste water in the cavity can also be discharged through the washing water drain port, which can reduce the contact of operators with corrosive waste water during disassembly and maintenance.

[0022] In an optional embodiment, the inner cavity is provided with at least one condensation water inlet, and the condensation water inlet is connected to the inner cavity.

[0023] In the above embodiment, condensed water can be injected into the inner cavity through the condensed water inlet to cool the exhaust gas or high-temperature mixed particulate matter and other substances entering the overflow device, dissolve harmful substances, and improve the exhaust gas treatment efficiency.

[0024] In an optional embodiment, the side wall of the overflow conduit is provided with a second washing water inlet. By providing the second washing water inlet, the overflow conduit can be flushed, and the adhesion of corrosive particles on the inner wall of the overflow conduit is reduced, so as to extend the service life of the overflow device.

[0025] The embodiment of the utility model further provides a waste gas treatment device, comprising the overflow device in the above embodiment. The waste gas treatment device has all the performances of the above overflow device.

[0026] The beneficial effects of the overflow device and the waste gas treatment equipment of the utility model embodiment include:

[0027] The overflow device includes a cavity, an overflow conduit and an overflow protective tube. The overflow conduit is connected to the cavity. The inlet end of the overflow conduit is located in the cavity and is higher than the bottom of the cavity to form an overflow trough in the cavity. By setting the inlet end of the overflow conduit higher than the bottom of the cavity, an overflow trough is formed in the cavity, so that large particles can be deposited in the overflow trough. The overflow protective tube is sleeved in the overflow conduit and protrudes from the inlet end of the overflow conduit. The overflow protective tube is sleeved in the overflow conduit, which can increase the height of the overflow conduit so that more large particles can be deposited. Moreover, since there is a gap between the overflow protective tube and the overflow conduit, some particles may be stuck in the gap and cannot flow into the overflow conduit with the impact of the water flow. The gap can screen particles of some diameters, prevent some larger particles from clogging the overflow conduit, and achieve preliminary solid-liquid separation. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 A schematic diagram of an overflow device provided in an embodiment of the utility model;

[0030] Figure 2 A cross-sectional schematic diagram of an overflow device provided in an embodiment of the utility model;

[0031] Figure 3 It is a cross-sectional schematic diagram of AA provided in an embodiment of the utility model;

[0032] Figure 4 It is a cross-sectional schematic diagram of BB provided in an embodiment of the utility model;

[0033] Figure 5 It is a perspective schematic diagram of the overflow device provided in the embodiment of the utility model.

[0034] Icons: 1000-overflow device; 100-cavity; 110-external cavity; 111-first chamber; 112-air inlet; 120-inner cavity; 121-second chamber; 122-overflow port; 130-overflow trough; 300-first washing water inlet; 400-overflow duct; 410-inlet end; 420-outlet end; 500-overflow protective pipe; 600-protective pipe bracket; 700-washing water drain outlet; 800-second washing water inlet; 900-condensate inlet. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0038] In the description of the present utility model, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when used. It is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present utility model.

[0039] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0040] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0041] Overflow devices play an important role in waste treatment equipment. When the liquid or solid in the waste gas treatment equipment reaches a certain height, they will flow out of the overflow device. The overflow device can prevent excessive accumulation of liquid or solid inside the waste gas treatment equipment or increase in pressure. However, most of the current overflow devices have simple structures, and particles of different sizes are easy to enter the overflow conduit. These larger particles are easy to block the overflow conduit, resulting in unsatisfactory equipment treatment efficiency. Or these larger particles fall into the next process through the overflow device, affecting the subsequent waste gas treatment efficiency.

[0042] Based on this, see Figure 1 and Figure 2The overflow device 1000 provided in the embodiment of the utility model can effectively improve the above-mentioned technical problems. The overflow device 1000 can screen the particles, prevent large particles from falling in, and play a preliminary role in solid-liquid separation to improve the waste gas treatment efficiency. The overflow device 1000 can be applied to waste gas treatment equipment, and the waste gas treatment equipment with the overflow device 1000 also has the same function.

[0043] The waste gas treatment equipment includes a reaction chamber, a water scrubber and an overflow device 1000, etc. The overflow device 1000 includes an air inlet 112 and an air outlet, the air inlet 112 is connected to the reaction chamber, and the air outlet is connected to the water scrubber. The overflow device 1000 in this embodiment is provided with an air inlet 112 at the top of the outer cavity 110, and an air outlet is provided at the bottom of the inner cavity 120. Specifically, the outlet end 420 of the overflow conduit 400 is the air outlet. In order to facilitate the installation of the overflow device 1000, a mounting flange is provided on one side of the overflow device 1000 close to the air inlet 112. In addition, in this embodiment, the upper cover of the overflow device 1000 is designed as a flange cover, which is also convenient for the operator to open the flange cover for cleaning and maintenance when cleaning. Of course, the waste gas treatment equipment may also include other device structures. The waste gas treatment equipment in this embodiment is only one of the embodiments. The waste gas treatment equipment can be designed according to the treatment requirements. What kind of structure the waste gas treatment equipment specifically includes is not limited here.

[0044] The structure of the overflow device 1000 is described in detail below.

[0045] Figure 1 A schematic diagram of an overflow device 1000 provided in an embodiment of the utility model; Figure 2 It is a cross-sectional schematic diagram of the overflow device 1000 provided in the embodiment of the utility model; Figure 3 It is a cross-sectional schematic diagram of AA provided in the embodiment of the utility model, as shown Figure 1 , Figure 2 and Figure 3As shown, in order to screen the particulate matter, prevent the particulate matter from clogging the overflow conduit 400, improve the service life of the overflow device 1000, and prevent large particles from falling into the next process and affecting the exhaust gas treatment efficiency, the overflow device 1000 in this embodiment includes a cavity 100, an overflow conduit 400 and an overflow protective tube 500. The overflow conduit 400 is connected to the cavity 100, and the inlet end 410 of the overflow conduit 400 is located in the cavity 100 and is higher than the bottom of the cavity 100 to form an overflow groove 130 in the cavity 100. The overflow protective tube 500 is sleeved in the overflow conduit 400 and protrudes from the inlet end 410 of the overflow conduit 400, and a gap is left between the overflow protective tube 500 and the overflow conduit 400. The overflow protective tube 500 is located in the overflow conduit 400, and there is a gap between the overflow protective tube 500 and the overflow conduit 400 after the overflow protective tube 500 and the overflow conduit 400 are sleeved, so as to screen the particulate matter.

[0046] By setting the inlet end 410 of the overflow conduit 400 higher than the bottom of the cavity 100, an overflow trough 130 is formed in the cavity 100, so that large particles can be deposited in the overflow trough 130. In addition, an overflow protective tube 500 is sleeved in the overflow conduit 400, and the overflow protective tube 500 protrudes from the inlet end 410 of the overflow conduit 400, which can increase the height of the overflow conduit 400 so that more large particles can be deposited. Moreover, there is a gap between the overflow protective tube 500 and the overflow conduit 400, and some particles may be stuck in the gap and cannot flow into the overflow conduit 400 with the impact of the water flow. The gap can screen some medium-diameter particles, and can further prevent some larger particles from flowing into the overflow conduit 400 and blocking the overflow conduit 400, thereby achieving preliminary solid-liquid separation.

[0047] Figure 5 This is a perspective schematic diagram of the overflow device 1000 provided in the embodiment of the utility model, please refer to Figure 3 , and combined with Figure 2 and Figure 5The cavity 100 overflow device 1000 in this embodiment includes an outer cavity 110 and an inner cavity 120, the side wall of the outer cavity 110 is provided with a first washing water inlet 300; the inner cavity 120 is provided in the outer cavity 110, a first chamber 111 is formed between the inner cavity 120 and the outer cavity 110, and the first chamber 111 is communicated with the first washing water inlet 300; a second chamber 121 is formed in the inner cavity 120, an overflow port 122 communicated with the first chamber 111 is formed at the top of the inner cavity 120, and the overflow port 122 is used to guide the liquid overflowing from the first chamber 111 to flow through the inner wall of the inner cavity 120. The overflow conduit 400 is communicated with the inner cavity 120. Specifically, by controlling the flow rate of the incoming water, the liquid flowing in from the first washing water inlet 300 can be controlled to fill the first chamber 111 and then overflow along the overflow port 122 to flow into the second chamber 121 along the inner wall of the inner cavity 120, thereby cleaning the inner wall of the inner cavity 120.

[0048] The overflow device 1000 in this embodiment forms two chambers, namely, a first chamber 111 and a second chamber 121, by providing an inner chamber 120 and an outer chamber 110. An overflow port 122 communicating with the first chamber 111 is formed at the top of the inner chamber 120, and the overflow port 122 is used to guide the liquid overflowing from the first chamber 111 to flow through the inner wall of the inner chamber 120. Washing water is injected from the first chamber 111. After the washing water fills the first chamber 111, it will flow into the second chamber 121 along the wall of the inner chamber 120 to clean the wall of the inner chamber 120, so that it is not easy for particles to adhere to or scale to form on the wall of the inner chamber 120. By adopting the design of the double chamber 100, and then injecting washing water from the outer chamber 110, the wall of the inner chamber 120 can be cleaned without disassembling the overflow device 1000, so that it is not easy for particles to adhere to or scale to form on the wall of the inner chamber 120. The dual-chamber design can also facilitate the cleaning of the overflow device 1000 , making the inner wall of the cavity 100 of the overflow device 1000 less susceptible to corrosion, thereby extending the service life of the overflow device 1000 .

[0049] In order to improve the cleaning efficiency of the inner wall of the overflow device 1000, the number of the first washing water inlet 300 in this embodiment is multiple, and the multiple first washing water inlet 300 is arranged at intervals on the cavity 100, and the multiple first washing water inlet 300 is connected to the first chamber 111. When it is necessary to clean the inner wall of the cavity 100, water can be injected from the multiple first washing water inlet 300 to speed up the speed of the outer cavity 110 being filled with water and overflowing, and the flow rate of the overflow water can also be increased to clean the inner wall of the inner cavity 120, so as to prevent the inner wall of the inner cavity 120 from being attached with particles, thereby preventing the inner wall of the inner cavity 120 from being scaled or corroded.

[0050] Since the existing overflow device 1000 has a simple structure and cannot screen the particles, the waste gas particles may accumulate and crystallize into blocks in the pipes of the waste gas treatment equipment, causing pipe blockage, thereby resulting in the waste gas treatment equipment The treatment efficiency is not ideal. In order to further screen the waste gas particles, please refer to Figure 3 and Figure 4 , and combined with Figure 5 , Figure 4 BB is a cross-sectional schematic diagram provided in an embodiment of the utility model; the overflow conduit 400 of the overflow device 1000 in this embodiment includes an inlet end 410 and an outlet end 420, and the inlet end 410 extends into the inner cavity 120; and the position of the inlet end 410 is higher than the position of the bottom of the inner cavity 120. Because the position of the inlet end 410 of the overflow conduit 400 is set higher than the position of the bottom plate of the cavity 100, the overflow conduit 400 has a raised height in the cavity 100, and water can be stored in the inner cavity 120, which can have a buffering effect when the exhaust gas particles enter the inner cavity 120 of the overflow device 1000. A part of the larger particles will be deposited in the inner cavity 120, and the particles can be preliminarily screened to prevent the particles from clogging the overflow conduit 400. When the dust particle content of the exhaust gas introduced is large, because the inlet end 410 of the overflow duct 400 is located higher than the bottom plate, fine particles may also form scale on the bottom plate of the inner cavity 120, appearing sludge, and some dust particles can also be screened out.

[0051] As long as the particles can be screened according to their physical properties such as size or volume, the height of the inlet end 410 of the overflow conduit 400 above the bottom plate of the chamber 100 is not limited here. The height of the inlet end 410 of the overflow conduit 400 above the bottom plate of the chamber 100 is determined according to the size or volume of the particles to be screened.

[0052] To facilitate cleaning of the overflow conduit 400 and the overflow protection tube 500, refer to Figure 5 , and combined with Figure 2, the overflow device 1000 in this embodiment also includes a protective tube bracket 600, the protective tube bracket 600 is fixedly connected to the overflow protective tube 500, and the protective tube bracket 600 is detachably connected to the overflow conduit 400. By providing the protective tube bracket 600, the structural strength of the overflow protective tube 500 can be increased, and it is easy to install. The protective tube bracket 600 and the overflow conduit 400 are detachably connected, which can facilitate the replacement of the overflow protective tube 500. In detail, the number of protective tube brackets 600 is multiple, and multiple protective tube brackets 600 are evenly arranged on the side wall of the overflow protective tube 500 along the circumferential direction. By providing multiple protective tube brackets 600, the overflow protective tube 500 can be better connected to the overflow conduit 400, and it is also convenient for the staff to take and replace the overflow protective tube 500. In this embodiment, the number of protective tube brackets 600 is 4. Of course, the number of protective tube brackets 600 can also be 2, 3, 5, etc., which is not limited here.

[0053] Specifically, the protective tube bracket 600 in this embodiment is welded to the overflow protective tube 500, and the protective tube bracket 600 is snap-connected to the overflow conduit 400. The overflow protective tube 500 is snap-connected to the overflow conduit 400 through the protective tube bracket 600, which makes it convenient for the operator to directly pull out the overflow protective tube 500 during cleaning, separate it from the overflow conduit 400, and clean it. In addition, the overflow protective tube 500 is snap-connected to the overflow conduit 400 through the protective tube bracket 600, which is also convenient for replacing the overflow protective tube 500. Specifically, a groove can be set on the overflow conduit 400, and a corresponding buckle structure can be set on the protective tube bracket 600. A buckle structure can also be set on the overflow conduit 400, and a corresponding groove can be set on the protective tube. Of course, the protective tube bracket 600 can also be fixedly connected to the overflow protective tube 500 by riveting or other methods, as long as the protective tube bracket 600 and the overflow protective tube 500 can be connected together and the overflow conduit 400 can be easily removed at the same time, and the specific fixed connection method is not limited here. In addition, in addition to the clamping method, the protective tube bracket 600 and the overflow conduit 400 can also be connected by fasteners or other detachable methods, which are not limited here.

[0054] A lot of particles may accumulate on the bottom plate of the chamber 100, which may also cause blockage. In order to facilitate regular cleaning of the deposited particles on the bottom plate of the chamber 100, please refer to 5 and combine Figure 1 and Figure 3 In this embodiment, a washing water drain port 700 is provided at the bottom of the inner cavity 120. By providing the washing water drain port 700, the particles or deposited sludge at the bottom of the cavity 100 can be washed and discharged to reduce the blockage of particles. The waste water in the cavity 100 can also be discharged through the washing water drain port 700, which can reduce the contact of operators with corrosive waste water during disassembly and maintenance.

[0055] In order to reduce the adhesion of corrosive particles in the overflow conduit 400 and increase the service life of the overflow conduit 400, please continue to refer to Figure 5 , and combined with Figure 1 and Figure 3 In this embodiment, the side wall of the overflow conduit 400 is provided with a second washing water inlet 800. Water can be injected into the overflow conduit 400 through the second washing water inlet 800 to flush the overflow conduit 400. The water flow can take away the particles attached to the overflow conduit 400 to extend its service life.

[0056] In order to improve the exhaust gas treatment efficiency, the cavity 100 in this embodiment is provided with at least one condensed water inlet 900, and the condensed water inlet 900 is connected to the inner cavity 120. Condensed water can be injected into the inner cavity 120 through the condensed water inlet 900 to cool the exhaust gas or high-temperature mixed particulate matter and other substances entering the overflow device 1000, dissolve harmful substances, and improve the exhaust gas treatment efficiency.

[0057] According to an overflow device 1000 provided in this embodiment, its working principle is as follows:

[0058] When the overflow device 1000 needs to be cleaned, water is injected into the outer cavity 110 through the first washing water inlet 300. After the second chamber 121 is filled, since the inner cavity 120 has an overflow port 122, the water will flow downward along the inner wall of the inner cavity 120 and flow into the second chamber 121, thereby effectively cleaning the inner wall of the inner cavity 120 and reducing the adhesion or scaling of the exhaust gas particle mixture. At the same time, the washing water drain port 700 can also be opened to flush and discharge the particles at the bottom of the inner cavity 120. The overflow device 1000 can also be emptied through the washing water drain port 700, which can reduce the operator's contact with corrosive wastewater during disassembly and maintenance.

[0059] When the exhaust gas treatment equipment is working normally, water can be injected from the condensed water inlet 900 to cool down the exhaust gas or high-temperature mixed particles and other substances entering the overflow device 1000, and dissolve harmful substances. In addition, the position of the inlet end 410 of the overflow conduit 400 of the overflow device 1000 in this embodiment is higher than the position of the bottom of the inner cavity 120, and some larger particles will be deposited at the bottom of the inner cavity 120 and will not enter the overflow conduit 400. In addition, an overflow protective tube 500 is provided in the middle of the overflow conduit 400, and there is a gap between the overflow protective tube 500 and the overflow conduit 400. Some particles may be stuck in the gap and cannot flow into the overflow conduit 400 with the impact of the water flow. The gap can also screen some medium-diameter particles, which can further prevent some larger particles from flowing into the overflow conduit 400 and blocking the overflow conduit 400, thereby achieving preliminary solid-liquid separation.

[0060] In summary, the overflow device 1000 provided in this embodiment includes a cavity 100, an overflow conduit 400 and an overflow protective tube 500. The overflow conduit 400 is connected to the cavity 100. The inlet end 410 of the overflow conduit 400 is located in the cavity 100 and is higher than the bottom of the cavity 100, so as to form an overflow groove 130 in the cavity 100. The overflow protective tube 500 is sleeved in the overflow conduit 400 and protrudes from the inlet end 410 of the overflow conduit 400. A gap is left between the overflow protective tube 500 and the overflow conduit 400. By setting the inlet end 410 of the overflow conduit 400 higher than the bottom of the cavity 100, the overflow groove 130 is formed in the cavity 100, so that large particles can be deposited in the overflow groove 130. In addition, by sleeved with an overflow protective tube 500 inside the overflow conduit 400, and the overflow protective tube 500 protruding from the inlet end 410 of the overflow conduit 400, the height of the overflow conduit 400 can be increased, so that some of the larger particles can be deposited. Moreover, there is a gap between the overflow protective tube 500 and the overflow conduit 400, and some particles may be stuck in the gap and cannot flow into the overflow conduit 400 with the impact of the water flow. The gap can screen out particles of some diameters, and can further prevent some larger particles from clogging the overflow conduit 400. The gap can screen out some particles of medium diameter, and can further prevent some larger particles from flowing into the overflow conduit 400 and clogging the overflow conduit 400, thereby achieving preliminary solid-liquid separation.

[0061] The above is only a specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be included in the protection scope of the present invention.

Claims

1. An overflow device, characterized in that: include: Cavity (100); an overflow conduit (400), the overflow conduit (400) being in communication with the cavity (100); an inlet end (410) of the overflow conduit (400) being located in the cavity (100) and higher than the bottom of the cavity (100) so as to form an overflow trough (130) in the cavity (100); An overflow protective tube (500) is sleeved in the overflow conduit (400) and protrudes from the inlet end (410) of the overflow conduit (400), with a gap being left between the overflow protective tube (500) and the overflow conduit (400).

2. The overflow device according to claim 1, characterized in that The overflow device (1000) further comprises a protective pipe support (600), wherein the protective pipe support (600) is fixedly connected to the overflow protective pipe (500), and the protective pipe support (600) is detachably connected to the overflow conduit (400).

3. The overflow device according to claim 2, characterized in that: The protective pipe bracket (600) is welded to the overflow protective pipe (500), and the protective pipe bracket (600) is clamped to the overflow conduit (400).

4. The overflow device according to claim 2, characterized in that: There are a plurality of the protective pipe supports (600), and the plurality of protective pipe supports (600) are evenly arranged on the side wall of the overflow protective pipe (500) along the circumferential direction.

5. The overflow device according to claim 1, characterized in that: The cavity (100) comprises an inner cavity (120) and an outer cavity (110), and a first washing water inlet (300) is provided on a side wall of the outer cavity (110); The inner cavity (120) is arranged in the outer cavity (110), and a first chamber (111) is formed between the inner cavity (120) and the outer cavity (110), and the first chamber (111) is communicated with the first washing water inlet (300); a second chamber (121) is formed in the inner cavity (120), and an overflow port (122) communicated with the first chamber (111) is formed at the top of the inner cavity (120), and the overflow port (122) is used to guide the liquid overflowing from the first chamber (111) to flow through the inner wall of the inner cavity (120); the overflow conduit (400) is communicated with the inner cavity (120).

6. The overflow device according to claim 5, characterized in that There are a plurality of the first washing water inlets (300), and the plurality of the first washing water inlets (300) are arranged at intervals on the outer cavity (110), and the plurality of the first washing water inlets (300) are all connected to the first chamber (111).

7. The overflow device according to claim 5, characterized in that A washing water drain port (700) is provided at the bottom of the inner cavity (120).

8. The overflow device according to claim 5, characterized in that: The inner cavity (120) is provided with at least one condensed water inlet (900), and the condensed water inlet (900) is connected to the inner cavity (120).

9. The overflow device according to any one of claims 1 to 8, characterized in that: The side wall of the overflow conduit (400) is provided with a second washing water inlet (800).

10. A waste gas treatment device, characterized in that: The overflow device (1000) comprises the overflow device (1000) as described in any one of claims 1 to 9.

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