A system for co-processing of particulate matter and odor in exhaust gas of a casting drying section

Abstract

The application discloses a kind of casting drying section waste gas particulate and odor synergistic treatment system, comprising: heat exchange type dust removal mechanism;Catalytic tower, its gas inlet end is connected by pipeline heat exchange type dust removal mechanism exhaust end;Oxidation tower, its gas inlet end is connected by pipeline catalytic tower exhaust end;Exhaust cylinder, its gas inlet end is connected by pipeline oxidation tower outlet end;Water tank, the liquid outlet end of the water tank is connected by pipeline and pump body with the liquid inlet end of oxidation tower;And, ozone generator, its output end is connected by pipeline in catalytic tower ozone inlet end.The application is provided with heat exchange type dust removal mechanism, by heat exchange type dust removal mechanism so that casting drying section waste gas enters filter inner cylinder, under the action of centrifugal force removes particulate in waste gas while with waste gas and liquid circulation mechanism heat exchange, by the liquid flowing in liquid circulation mechanism recovers the heat energy in waste gas to water tank, completes recycling of heat energy, reduces the energy waste caused.

Description

Technical Field

[0001] This invention relates to the field of organic waste gas treatment technology, specifically to a co-treatment system for particulate matter and odor in waste gas from a casting drying section. Background Technology

[0002] The organic waste gas generated in the casting drying section is mainly the organic waste gas generated by the partial volatilization of organic components in water-based coatings when heated, such as aromatic hydrocarbons in phenolic resin in sand cores, phenols and aldehydes produced by the thermal decomposition of phenolic resin, and formaldehyde and ammonia produced by the decomposition of hexamethylenetetramine in hot core coated sand. The drying waste gas contains aromatic hydrocarbons, formaldehyde, ammonia, phenolic compounds, tar and other components, and is characterized by high temperature, high humidity, high tar content, pungent smell, and eye irritation, which seriously pollutes the environment and therefore needs to be treated.

[0003] Currently, exhaust gas from casting drying sections is typically treated using a co-treatment system for particulate matter and odor. Existing systems usually consist of a cyclone dust collector and a catalytic oxidation tower. The cyclone dust collector removes particulate matter from the exhaust gas, and the catalytic oxidation tower further oxidizes the gas and removes odors. While this method effectively removes particulate matter and odors from the casting drying exhaust gas, the exhaust gas contains a significant amount of heat energy. Existing co-treatment systems do not readily recover and utilize this heat energy, resulting in energy waste, additional thermal pollution, and compromised treatment quality. Therefore, we propose a co-treatment system for particulate matter and odor in casting drying section exhaust gas. Summary of the Invention

[0004] The purpose of this invention is to provide a co-treatment system for particulate matter and odor in the exhaust gas of casting drying section, so as to solve the problems mentioned in the background art that the existing co-treatment system for particulate matter and odor is inconvenient to recover and utilize heat energy, resulting in energy waste, and is also prone to generating additional thermal pollution to the environment, and also affects the treatment quality of the exhaust gas of casting drying section.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A co-treatment system for particulate matter and odor from waste gas in a casting drying section includes:

[0007] The heat exchange dust removal mechanism is used to remove dust from the exhaust gas in the casting drying section and recover the heat from the exhaust gas.

[0008] A catalytic tower, the inlet of which is connected to the exhaust end of a heat exchange dust removal mechanism via a pipeline, and the catalytic tower is equipped with a catalyst layer.

[0009] An oxidation tower, whose gas inlet end is connected with the gas outlet end of the catalytic tower through a pipeline;

[0010] An exhaust cylinder, whose gas inlet end is connected with the gas outlet end of the oxidation tower through a pipeline;

[0011] A water tank, which stores spraying liquid, and whose liquid outlet end is connected with the liquid inlet end of the oxidation tower through a pipeline and a pump body, and

[0012] An ozone generator, whose output end is connected with the ozone inlet end in the catalytic tower through a pipeline.

[0013] Compared with the prior art, the present application has the following advantages:

[0014] The present application is provided with a heat exchange type dust removal mechanism, which makes the casting drying section exhaust gas enter the filter inner cylinder, removes the particulate matters in the exhaust gas under the action of centrifugal force, exchanges heat between the exhaust gas and the liquid flow mechanism, recovers the heat energy in the exhaust gas to the water tank through the liquid flowing in the liquid flow mechanism, completes the recycling of heat energy, reduces the energy waste and the additional heat pollution to the environment, and ensures the treatment quality of the casting drying section exhaust gas in the subsequent treatment work.

[0015] The hollow shafts in the filter inner cylinder and the liquid flow mechanism rotate in opposite directions, the centrifugal force is used to improve the filtering quality of the casting drying section exhaust gas through the filter inner cylinder, the uniformity of the contact between the hollow shaft and the hollow heat conducting rod and the exhaust gas is improved, the heat exchange quality between the exhaust gas and the liquid flowing in the hollow shaft and the hollow heat conducting rod is ensured, and when the hollow heat conducting rod rotates with the hollow shaft, one end of the hollow heat conducting rod can swing to disturb the exhaust gas, which further improves the uniformity and efficiency of heat exchange, and the swing also helps to prevent the formation of deposits on the heat exchange surface.

[0016] The present application is also provided with a ring-shaped driving block, an impact rod one, a wedge-shaped block one, an elastic telescopic rod, a wedge-shaped block two, an impact ball one and an impact ball two, which make the impact ball one and the impact ball two intermittently impact the filter inner cylinder and the hollow shaft when the filter inner cylinder rotates, and then make the particulate matters attached to the inner wall of the filter inner cylinder and the outer wall of the hollow shaft move downward, preventing the filter holes of the filter inner cylinder from being blocked and preventing the particulate matters from being attached to the outer wall of the hollow shaft to affect the heat exchange quality.

[0017] The present application is also provided with a reciprocating screw, a sealing ring, a movable ring and a bellows, which drive the bellows to cover the outer wall of the filter inner cylinder through the movable ring, so that the exhaust gas entering the filter inner cylinder cannot enter the gas flow cavity through the filter holes and then be discharged from the exhaust pipe, and the exhaust gas can be controlled to be heated to the required temperature in the filter inner cylinder before being discharged, which improves the applicability of the treatment system and further improves the quality of the subsequent catalytic oxidation and odor treatment of the exhaust gas. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 Structure diagram of the processing system of the present application;

[0019] Figure 2 Structure diagram of the heat exchange dust removal mechanism of the present application;

[0020] Figure 3 Structure diagram of the present application Figure 2 Structure diagram of the present application

[0021] Figure 4 Structure diagram of the present application Figure 3 Structure diagram of the present application

[0022] Figure 5 Structure diagram of the present application

[0023] Figure 6 Structure diagram of the present application Figure 3 Structure diagram of the present application

[0024] Figure: 100, heat exchange dust removal mechanism; 101, shell; 102, filter inner cylinder; 103, air inlet pipe; 104, sealing ring; 105, exhaust pipe; 106, dust removal pipe; 107, hollow seat; 108, water tank; 109, hollow shaft; 110, rotating device one; 111, gear set; 112, hollow heat conduction rod; 113, pull rope; 114, movable inner rod; 115, arc-shaped protrusion; 116, elastic connecting piece; 117, reciprocating lead screw; 118, movable ring; 119, bellows; 120, telescopic device; 121, sealing plate; 122, annular driving block; 123, impact rod one; 124, wedge-shaped block one; 125, elastic telescopic rod; 126, wedge-shaped block two; 127, detection sensor; 200, catalytic tower; 300, oxidation tower; 400, ozone generator; 500, water tank; 600, exhaust cylinder. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0026] Embodiment 1

[0027] Please refer to the drawings Figure 1

[0028] A cast drying section waste gas particulate matter and odor synergistic treatment system, comprising:

[0029] The heat exchange type dust removal mechanism 100 is used for dust removal and heat recovery of the casting drying section waste gas, heat collection and utilization of the heat in the casting drying section waste gas, energy saving, and improvement of the quality of the subsequent treatment of the casting drying section waste gas.

[0030] The catalytic tower 200 has an air inlet end (provided at the bottom of the catalytic tower 200) connected to the air outlet end of the heat exchange type dust removal mechanism 100 by a pipeline, and a catalyst layer is arranged in the catalytic tower 200, wherein the catalyst layer is composed of a carrier loaded with metal oxides, the carrier includes clay, molecular sieve, ceramsite, and activated carbon macroporous material, the metal oxides loaded on the surface of the catalyst include one or more of aluminum oxide, manganese oxide, iron oxide, tin oxide, silver oxide, and other transition metal oxides, and a multi-metal catalyst is preferred.

[0031] Alternatively, activated carbon (4-6 mm columnar granular activated carbon) is arranged on the catalyst layer, and a metal catalyst is loaded on the activated carbon, and of course, the catalyst layer is not limited to the above-mentioned types.

[0032] The oxidation tower 300 has an air inlet end (provided at the bottom of the oxidation tower 300) connected to the air outlet end (provided at the top of the catalytic tower 200) of the catalytic tower 200 by a pipeline, and the oxidation tower 300 is a conventional device in the art, and a nozzle for spraying liquid is arranged at the top of the inner cavity of the oxidation tower 300.

[0033] The exhaust cylinder 600 has an air inlet end connected to the air outlet end (provided at the top of the oxidation tower 300) of the oxidation tower 300 by a pipeline, and is used for discharging the purified drying section waste gas.

[0034] The water tank 500 stores the spraying liquid, and the liquid outlet end of the water tank 500 is connected to the liquid inlet end (provided at the top of the oxidation tower 300) of the oxidation tower 300 by a pipeline and a pump body.

[0035] The ozone generator 400 has an output end connected to the ozone inlet end (provided at the bottom of the catalytic tower 200) in the catalytic tower 200 by a pipeline.

[0036] After the casting drying section waste gas is subjected to dust removal and cooling treatment by the heat exchange type dust removal mechanism 100, the casting drying section waste gas enters the catalytic tower 200, and superoxide free radicals and hydroxyl free radicals with oxidizing properties are generated by the catalyst layer and ozone, and the strong oxidizing properties of the superoxide free radicals and hydroxyl free radicals are used to decompose various organic pollutants in the waste gas into carbon dioxide and water, and then the waste gas is subjected to spraying treatment in the oxidation tower 300 to remove peculiar smell and the like in the waste gas, so that the waste gas meets the emission standard and is discharged from the exhaust cylinder 600.

[0037] As preferred, a fan is arranged on the pipeline connecting the catalytic tower 200 and the heat exchange type dust removal mechanism 100, the pipeline connecting the catalytic tower 200 and the oxidation tower 300, and the pipeline connecting the oxidation tower 300 and the exhaust cylinder 600.

[0038] As preferred, the output end of the ozone generator 400 of the embodiment is also connected to the water tank 500 through a pipeline, the liquid inlet end of the water tank 500 is connected to the liquid outlet end of the oxidation tower 300 through a pipeline, and a catalyst layer can be arranged in the water tank 500, which is helpful for recycling the spray liquid in the water tank 500.

[0039] Embodiment 2

[0040] Please refer to the accompanying Figure 2 - the accompanying Figure 5

[0041] As preferred, the heat exchange type dust removal mechanism 100 of the embodiment comprises:

[0042] The shell 101 is provided with a hollow filter inner cylinder 102 at the top of the inner cavity through a bearing, the lower end of the outer wall of the filter inner cylinder 102 is provided with a sealing ring 104 through a bearing, the sealing ring 104 is fixedly arranged on the inner wall of the shell 101, and a gas flow cavity is formed around the top outer wall of the sealing ring 104, the outer wall of the filter inner cylinder 102 and the inner wall of the shell 101, so as to flow the exhaust gas through the filter inner cylinder 102, and the gas flow cavity and the inner cavity of the filter inner cylinder 102 are connected through the filter hole of the outer wall of the filter inner cylinder 102;

[0043] The gas inlet pipe 103 is arranged at the top of the shell 101 and connected to the inner cavity of the filter inner cylinder 102, and is used for the exhaust gas of the casting drying section to enter, and an electromagnetic valve can be arranged in the gas inlet pipe 103, so as to control the entering of the exhaust gas;

[0044] The gas outlet pipe 105 is arranged on the outer wall of the shell 101 and connected to the gas flow cavity, and is used for the filtered exhaust gas of the casting drying section to be discharged to the catalytic tower 200, and an electromagnetic valve can be arranged in the gas outlet pipe 105, so as to control the discharging of the exhaust gas; and

[0045] The liquid flow mechanism is arranged in the filter inner cylinder 102, and both ends thereof are connected to the water tank 108 through pipelines, and a pump body is arranged on one of the pipelines, the water tank 108 is arranged on the outer wall of the shell 101 and stores liquid in the inner cavity, and a drain pipe and a water supplementing port are arranged on one side of the water tank 108;

[0046] The exhaust gas of the casting drying section enters the inner cavity of the filter inner cylinder 102 through the gas inlet pipe 103, then enters the gas flow cavity after removing the particulate matter through the filter hole, and then enters the catalytic tower 200 through the gas outlet pipe 105; when the exhaust gas of the casting drying section is in the inner cavity of the filter inner cylinder 102, the exhaust gas exchanges heat with the liquid flowing in the liquid flow mechanism, the liquid exchanges heat and then enters the water tank 108, and the liquid after heat exchange can be used by opening the drain pipe when needed.

[0047] As preferred, the liquid flow mechanism of the embodiment comprises:

[0048] A hollow shaft 109 is arranged in the inner cavity of the filter inner cylinder 102 and coaxial with the filter inner cylinder 102. The top end of the hollow shaft 109 is movably penetrated through the top of the shell 101 and extends into the hollow seat 107. The connection between the hollow shaft 109 and the shell 101 and the hollow seat 107 is provided with bearings. The bottom end of the hollow shaft 109 is communicated with the water tank 108 through a pipeline. The hollow seat 107 is fixedly connected with the shell 101 and communicated with the water tank 108 through another pipeline.

[0049] A plurality of groups of hollow heat-conducting rods 112 are movably arranged on the outer wall of the hollow shaft 109 located in the filter inner cylinder 102 through torsion spring rotating shafts. The hollow heat-conducting rods 112 can be made of heat-conducting materials, such as copper. The torsion spring rotating shaft belongs to the conventional structure in the art, which includes a rotating shaft and a shaft seat movably connecting the hollow heat-conducting rod 112 with the outer wall of the hollow shaft 109 and a torsion spring sleeved on the outer wall of the rotating shaft. The hollow heat-conducting rod 112 is communicated with the inner cavity of the hollow shaft 109 through a hose. The end of the hollow heat-conducting rod 112 away from the filter inner cylinder 102 is connected with a pull rope 113. The pull rope 113 is penetrated through the outer wall of the hollow shaft 109 and connected with the bottom of the annular member. The pull rope 113 can be made of a steel wire rope with good high-temperature resistance and wear resistance. The annular member is movably arranged in the hollow shaft 109.

[0050] A movable inner rod 114 is movably arranged on the axis of the hollow shaft 109 and connected with the annular member. The movable inner rod 114 can be connected with the inner wall of the hollow shaft 109 through a support rod, so that a channel for liquid flow is formed between the outer wall of the movable inner rod 114 and the inner wall of the annular member. The top end of the movable inner rod 114 extends into the hollow seat 107 and connected with the inner wall of the hollow seat 107 through an elastic connecting member 116, such as an elastic telescopic rod. The outer wall of the movable inner rod 114 is eccentrically connected with a ball joint rod in contact with the inner wall of the bottom of the hollow seat 107. The ball joint rod belongs to the conventional structure in the art, which includes a rod body and a ball embedded in one end of the rod body. The inner wall of the bottom of the hollow seat 107 is provided with an arc-shaped protrusion 115 for driving the ball joint rod to move upward. In addition,

[0051] A rotating device one 110 is arranged on the top of the shell 101. The rotating device one 110 is, for example, a motor. The output end of the rotating device one 110 is drivingly connected with the hollow shaft 109 through a gear set 111 (two groups of meshing gears). The output end of the rotating device one 110 also extends to the inside of the filter inner cylinder 102 and drivingly connected with a gear ring fixed on the inner wall of the filter inner cylinder 102 through a gear. Through this arrangement, the filter inner cylinder 102 and the hollow shaft 109 can rotate in opposite directions. On the one hand, the centrifugal force can improve the filtering quality of the filter inner cylinder 102 on the exhaust gas. On the other hand, the heat exchange area between the hollow shaft 109 and the exhaust gas is increased, and the heat exchange quality and efficiency are improved.

[0052] In use, the liquid in the water tank 108 enters the hollow seat 107 through the pump body, and then enters the hollow shaft 109 and the hollow heat conducting rod 112, and then enters the water tank 108 through the pipeline to complete the circulation flow. After the exhaust gas enters the filter inner cylinder 102, the rotating device one 110 is opened, the rotating device one 110 drives the hollow shaft 109 to rotate through the gear set 111, and the filter inner cylinder 102 is driven to rotate in the opposite direction of the hollow shaft 109 through the gear and the toothed ring. When the hollow shaft 109 rotates, it drives the movable inner rod 114, which makes the ball connecting rod intermittently contact the arc-shaped protrusion 115, and then the movable inner rod 114 moves up and down relative to the hollow shaft 109 under the action of the elastic connecting piece 116, and then the annular piece intermittently pulls the hollow heat conducting rod 112 to swing through the pull rope 113. In this way, the exhaust gas in the filter inner cylinder 102 exchanges heat with the liquid flowing in the hollow shaft 109 and the hollow heat conducting rod 112, and the particulate matter in the exhaust gas is removed by the filter hole on the outer wall of the filter inner cylinder 102 under the action of centrifugal force.

[0053] As preferred, the bottom of the filter inner cylinder 102 of the embodiment is provided with a dust discharge port for the hollow shaft 109 to pass out, and the bottom of the shell 101 is provided with a dust discharge pipe 106 coaxial with the dust discharge port; the outer wall of the hollow shaft 109 and below the dust discharge port movably sheathes a sealing plate 121, which is connected with the telescopic device 120 arranged in the shell 101 and is driven by the telescopic device 120 to close or open the dust discharge port. The telescopic device 120 is, for example, an electric telescopic rod. By closing the dust discharge port through the sealing plate 121, the exhaust gas can be prevented from being discharged from the dust discharge port. When it is necessary to discharge the particulate matter filtered by the filter inner cylinder 102, the sealing plate 121 can be driven by the telescopic device 120 to open the dust discharge port.

[0054] As preferred, the treatment system of the embodiment further comprises:

[0055] The annular driving block 122 has a vertical cross-section in the shape of a right-angled trapezoid, and movably sheathes the outer wall of the dust discharge port. The inclined surface of the annular driving block 122 slidably abuts a ball connecting rod, which is in the shape of L and has a ball embedded at one end. The ball connecting rod is connected with a striking rod one 123, which is vertically inserted into the protrusion arranged on the inner wall of the shell 101. An elastic member for driving the striking rod one 123 to reset upward is sheathed on the outer wall of the striking rod one 123, one end of the elastic member is connected with one end of the outer wall of the striking rod one 123, and the other end is connected with the protrusion. The top end of the striking rod one 123 is provided with a striking ball one for contacting the bottom of the filter inner cylinder 102; and,

[0056] The wedge block one 124 is arranged at the bottom end of the impact rod one 123, and the inclined surface of the wedge block one 124 abuts against the wedge block two 126 arranged on the outer wall of the movable section of the elastic telescopic rod 125, and one end of the elastic telescopic rod 125 is connected to the inner wall of the shell 101, and the elastic telescopic rod 125 is used to be driven to contract by the wedge block two 126 when the wedge block one 124 is downward, and the movable section of the elastic telescopic rod 125 is further provided with the impact ball two used to contact the outer wall of the hollow shaft 109.

[0057] In use, the annular driving block 122 rotates with the filter inner cylinder 102, the bottom lowest end of the annular driving block 122 drives the ball connecting rod downward, so that the ball connecting rod drives the impact rod one 123 downward, and then the impact ball one is separated from the filter inner cylinder 102, when the impact rod one 123 is downward, the wedge block one 124 drives the wedge block two 126, so that the wedge block two 126 drives the movable section of the elastic telescopic rod 125 to move relative to the fixed section, and then the impact ball two is separated from the hollow shaft 109, when the bottom lowest end of the annular driving block 122 is staggered with the ball connecting rod, the impact rod one 123 is reset under the action of the elastic member, and then the impact rod one 123 drives the impact ball one to impact the filter inner cylinder 102, and at the same time, the elastic telescopic rod 125 drives the impact ball two to reset and impact the hollow shaft 109, so that the filter inner cylinder 102 and the hollow shaft 109 are vibrated, on the one hand, the particles remaining on the inner wall of the filter inner cylinder 102 can better move downward to the ash discharge port, so as to be discharged subsequently, and on the other hand, the particles in the exhaust gas are not easy to adhere to the outer wall of the hollow shaft 109 and the hollow heat conducting rod 112, so that the heat exchange quality is ensured.

[0058] As preferred, the upper portion of the sealing ring 104 of the embodiment is provided with a movable ring 118, and a bellows 119 is arranged between the movable ring 118 and the sealing ring 104. The movable ring 118 and the bellows 119 are movably sleeved on the outer wall of the filter inner cylinder 102. Threaded holes are formed in the two sides of the movable ring 118, and reciprocating lead screws 117 pass through the threaded holes. One end of the reciprocating lead screw 117 is rotatably connected to the sealing ring 104, and the other end movably penetrates the top of the shell 101 and is rotatably connected to a rotating device two arranged on the top of the shell 101. The rotating device two is, for example, a servo motor and a speed reducer, which is rotatably connected to the two groups of reciprocating lead screws 117 through a chain wheel transmission group (including a chain wheel and a chain). In use, the rotating device two is driven to rotate the two groups of reciprocating lead screws 117, so that the movable ring 118 drives the bellows 119 to move upward, and the bellows 119 is completely sleeved on the outer wall of the filter inner cylinder 102. Then, the waste gas enters the filter inner cylinder 102 through the gas inlet pipe 103. After a proper amount of organic waste gas enters, the electromagnetic valve in the gas inlet pipe 103 is closed. At this time, the waste gas in the filter inner cylinder 102 cannot directly pass through the filter hole and be discharged from the exhaust pipe 105. The waste gas can be retained in the filter inner cylinder 102 for a period of time. Then, the rotating device two is opened again, so that the movable ring 118 drives the bellows 119 to move downward to discharge the waste gas. This way can prolong the contact time of the waste gas in the filter inner cylinder 102 with the liquid flowing in the hollow shaft 109 and the hollow heat conducting rod 112, further improve the waste heat recovery quality, ensure that the waste gas can be cooled to the required temperature, and improve the subsequent catalytic oxidation and odor treatment quality.

[0059] As preferred, the shell 101 of the embodiment is provided with a detection sensor 127. The detection end of the detection sensor 127 extends into the filter inner cylinder 102. The detection sensor 127 is electrically connected to an external display device, for example, a display screen. After the bellows 119 is completely sleeved on the outer wall of the filter inner cylinder 102, the temperature detection sensor 127 detects the temperature of the waste gas in the filter inner cylinder 102 and displays the temperature through the external display device. When the temperature is at a preset threshold value, the user can control the rotating device two to make the waste gas enter the gas flow cavity, and can also control the valve body in the gas inlet pipe 103 to control the waste gas to enter the filter inner cylinder 102.

[0060] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A co-treatment system for particulate matter and odor in the exhaust gas from a casting drying section, characterized in that, include: A heat exchange dust removal mechanism (100) is used to remove dust from the exhaust gas of the casting drying section and recover the heat of the exhaust gas of the casting drying section; A catalytic tower (200) has its inlet end connected to the exhaust end of a heat exchange dust removal mechanism (100) via a pipeline, and the catalytic tower (200) is provided with a catalyst layer. The inlet of the oxidation tower (300) is connected to the exhaust of the catalytic tower (200) via a pipeline; The exhaust stack (600) has its inlet end connected to the outlet end of the oxidation tower (300) via a pipeline; A water tank (500) stores spray liquid, the outlet of which is connected to the inlet of an oxidation tower (300) via a pipeline and a pump; and, An ozone generator (400) has its output end connected to the ozone inlet end of a catalytic tower (200) via a pipeline; The heat exchange dust removal mechanism (100) includes: The housing (101) has a hollow filter inner cylinder (102) rotatably mounted inside. A sealing ring (104) is rotatably mounted on the lower end of the outer wall of the filter inner cylinder (102). The sealing ring (104) is fixedly mounted on the inner wall of the housing (101). A gas flow cavity is formed between the top outer wall of the sealing ring (104), the outer wall of the filter inner cylinder (102), and the inner wall of the housing (101). The gas flow cavity and the inner cavity of the filter inner cylinder (102) are connected through the filter holes on the outer wall of the filter inner cylinder (102). An air inlet pipe (103) is located at the top of the housing (101) and communicates with the inner cavity of the filter inner cylinder (102) for the entry of exhaust gas from the casting drying section; An exhaust pipe (105) is provided on the outer wall of the housing (101) and communicates with the gas flow chamber, through which the waste gas from the casting drying section is discharged to the catalytic tower (200) for filtration; and, The liquid flow mechanism is located inside the filter inner cylinder (102), and both ends of it are connected to the water tank (108) through pipes. A pump body is provided on one of the pipes. The water tank (108) is located on the outer wall of the shell (101) and its inner cavity stores liquid. The liquid flow mechanism includes: A hollow shaft (109) is disposed in the inner cavity of the filter inner cylinder (102) and is coaxial with the filter inner cylinder (102). The top end of the hollow shaft (109) movably passes through the top of the housing (101) and extends into the hollow seat (107). The bottom end of the hollow shaft (109) is connected to the water tank (108) through a pipe. The hollow seat (107) is fixedly connected to the housing (101), and the hollow seat (107) is connected to the water tank (108) through another pipe. Several sets of hollow heat-conducting rods (112) are rotatably mounted on the outer wall of the hollow shaft (109) located in the inner filter cylinder (102) via torsion spring shafts. The hollow heat-conducting rods (112) are connected to the inner cavity of the hollow shaft (109) via flexible hoses. The end of the hollow heat-conducting rod (112) away from the inner filter cylinder (102) is connected to a pull rope (113). The pull rope (113) passes through the outer wall of the hollow shaft (109) and is connected to an annular component. The annular component is movably mounted inside the hollow shaft (109). A movable inner rod (114) is movably disposed at the axis of the hollow shaft (109) and connected to the annular member. The movable inner rod (114) is connected to the inner wall of the hollow shaft (109) via a support rod. The top end of the movable inner rod (114) extends into the hollow seat (107) and is connected to the inner wall of the hollow seat (107) via an elastic connector (116). A ball connecting rod is eccentrically connected to the outer wall of the movable inner rod (114) and contacts the bottom inner wall of the hollow seat (107). The bottom inner wall of the hollow seat (107) is provided with an arc-shaped protrusion (115) for driving the ball connecting rod to move upward. Rotating device 1 (110) is located on the top of housing (101). The output end of the rotating device 1 (110) is connected to the hollow shaft (109) through a gear set (111). Its output end also extends to the inside of the filter inner cylinder (102) and is connected to the gear ring fixed on the inner wall of the filter inner cylinder (102) through a gear. The bottom of the filter inner cylinder (102) is provided with a dust discharge port through which the hollow shaft (109) passes; The processing system also includes: an annular drive block (122) with a right-angled trapezoidal vertical cross-section. The annular drive block (122) is movably fitted onto the outer wall of the dust discharge port. The annular drive block (122) rotates with the filter inner cylinder (102). The inclined surface of the annular drive block (122) slides against a ball connecting rod. At the lowest point of the bottom of the annular drive block (122), the annular drive block (122) and the ball connecting rod are offset. The ball connecting rod is connected to an impact rod (123). The impact rod (123) is vertically inserted into a protrusion on the inner wall of the housing (101). The outer wall of the impact rod (123) is fitted with an elastic element for driving it to return to its original position. The top of the impact rod (123) is provided with an impact ball for contacting the bottom of the filter inner cylinder (102); and a wedge block (124) is provided at the bottom of the impact rod (123), and the inclined surface of the wedge block (124) abuts against a wedge block (126). The wedge block (126) is provided on the outer wall of the movable section of the elastic telescopic rod (125), and one end of the elastic telescopic rod (125) is connected to the inner wall of the housing (101). The elastic telescopic rod (125) is used to be driven to retract by the wedge block (126) when the wedge block (124) moves downward. The movable section of the elastic telescopic rod (125) is also provided with an impact ball for contacting the outer wall of the hollow shaft (109).

2. The processing system according to claim 1, characterized in that: Fans are provided on the pipelines connecting the catalytic tower (200) and the heat exchange dust removal mechanism (100), the pipelines connecting the catalytic tower (200) and the oxidation tower (300), and the pipelines connecting the oxidation tower (300) and the exhaust stack (600).

3. The processing system according to claim 1, characterized in that: The output end of the ozone generator (400) is also connected to the water tank (500) through a pipeline. The inlet end of the water tank (500) is connected to the outlet end of the oxidation tower (300) through a pipeline. A catalyst layer is provided inside the water tank (500).

4. The processing system according to claim 1, characterized in that: The bottom of the housing (101) is provided with a dust discharge pipe (106) coaxial with the dust discharge port. The outer wall of the hollow shaft (109) and below the dust discharge port is movably fitted with a sealing plate (121). The sealing plate (121) is connected to a telescopic device (120) provided in the housing (101), and the telescopic device (120) drives the dust discharge port to close or open.

5. The processing system according to claim 1, characterized in that: A movable ring (118) is provided above the sealing ring (104), and a bellows (119) is provided between the movable ring (118) and the sealing ring (104). The movable ring (118) and the bellows (119) are both movably sleeved on the outer wall of the filter inner cylinder (102). Both sides of the movable ring (118) are threaded through a reciprocating screw (117). One end of the reciprocating screw (117) is rotatably connected to the sealing ring (104), and the other end is movably passed through the top of the housing (101) and is connected to the rotating device II located on the top of the housing (101).

6. The processing system according to claim 1, characterized in that: The housing (101) is provided with a detection sensor (127), the detection end of the detection sensor (127) extends into the filter inner cylinder (102), the detection sensor (127) is electrically connected to an external display device, and the detection sensor (127) includes a temperature detection sensor (127).

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