Waste gas particulate matter and peculiar smell cooperative processing system for casting drying section

Abstract

The invention discloses a casting drying section waste gas particulate matter and peculiar smell cooperative processing system. The system comprises a heat exchange type dust removal mechanism; the air inlet end of the catalytic tower is connected with the exhaust end of the heat exchange type dust removal mechanism through a pipeline; the gas inlet end of the oxidation tower is connected with the gas outlet end of the catalysis tower through a pipeline; the gas inlet end of the exhaust cylinder is connected with the gas outlet end of the oxidation tower through a pipeline; the liquid outlet end of the water tank is connected with the liquid inlet end of the oxidation tower through a pipeline and a pump body; and the output end of the ozone generator is connected with the ozone inlet end in the catalytic tower through a pipeline. The heat exchange type dust removal mechanism is arranged, casting drying section waste gas enters the filtering inner cylinder through the heat exchange type dust removal mechanism, particulate matter in the waste gas is removed under the action of centrifugal force, meanwhile, heat exchange is conducted on the waste gas and the liquid circulation mechanism, and heat energy in the waste gas is recycled into the water tank through liquid flowing in the liquid circulation mechanism; and heat energy recycling is completed, and caused energy waste is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of organic waste gas treatment, and in particular to a system for coordinating waste gas particulate matter and odor in a casting drying section. Background Art

[0002] The organic waste gas generated in the casting drying section is mainly the organic waste gas produced by the thermal volatilization of the organic components in the water-based coating, such as aromatic hydrocarbons in the phenolic resin in the sand core, phenols and aldehydes and other organic substances produced by the thermal decomposition of phenolic resin, and formaldehyde and ammonia produced by the decomposition of urotropine in the hot core coated sand. The drying waste gas contains aromatic hydrocarbons, formaldehyde, ammonia, phenolic compounds, tar and other components, and has the characteristics of high temperature, high humidity, high tar, pungent smell, and eye smoke, which seriously pollutes the environment and needs to be treated.

[0003] At present, the exhaust gas from the casting drying section is usually treated by a particulate matter and odor coordinated treatment system. The existing particulate matter and odor coordinated treatment system is usually composed of structures such as a cyclone dust collector and a catalytic oxidation tower. The particulate matter in the exhaust gas from the casting drying section is removed by a cyclone dust collector, and then the exhaust gas is catalytically oxidized and the odor of the exhaust gas is removed by equipment such as a catalytic oxidation tower. Although this method can effectively remove particulate matter and odor in the exhaust gas from the casting drying section, the exhaust gas from the casting drying section contains a large amount of heat energy. However, the existing particulate matter and odor coordinated treatment system is not convenient for recycling heat energy, resulting in energy waste, and it is also easy to cause additional thermal pollution to the environment, and it also affects the treatment quality of the treatment system for the exhaust gas from the casting drying section. To this end, we propose a particulate matter and odor coordinated treatment system for exhaust gas from the casting drying section. Summary of the invention

[0004] The object of the present invention is to provide a system for the coordinated treatment of particulate matter and odor in exhaust gas from a casting drying section, so as to solve the problem that the existing system for the coordinated treatment of particulate matter and odor proposed in the above-mentioned background technology is not convenient for recycling heat energy, resulting in energy waste, and is prone to additional thermal pollution to the environment, and also affects the treatment quality of the treatment system for exhaust gas from the casting drying section.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A system for coordinating waste gas particulate matter and odor in a casting drying section, comprising:

[0007] Heat exchange dust removal mechanism, 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;

[0008] A catalytic tower, the air inlet end of which is connected to the exhaust end of the heat exchange dust removal mechanism through a pipeline, and a catalyst layer is provided in the catalytic tower;

[0009] An oxidation tower, the air inlet end of which is connected to the exhaust end of the catalytic tower through a pipeline;

[0010] An exhaust pipe, the air inlet end of which is connected to the air outlet end of the oxidation tower through a pipeline;

[0011] A water tank storing spray liquid, wherein the liquid outlet of the water tank is connected to the liquid inlet of the oxidation tower through a pipeline and a pump body; and

[0012] The ozone generator has an output end connected to an ozone inlet end of the catalytic tower through a pipeline.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1) The present invention is provided with a heat exchange dust removal mechanism, through which the exhaust gas from the casting drying section enters the filter inner cylinder, removes particulate matter in the exhaust gas under the action of centrifugal force, and exchanges heat with the liquid circulation mechanism at the same time, and recovers heat energy in the exhaust gas into the water tank through the liquid flowing in the liquid circulation mechanism, thereby completing the recycling of heat energy, reducing energy waste and additional heat pollution to the environment, and ensuring the treatment quality of the exhaust gas from the casting drying section in subsequent treatment work;

[0015] 2) The hollow shafts in the filter inner cylinder and the liquid circulation mechanism of the present invention rotate in opposite directions, and centrifugal force is used to improve the filtering quality of the exhaust gas in the casting drying section passing through the filter inner cylinder, while improving the uniformity of the contact between the hollow shaft and the hollow heat-conducting rod and the exhaust gas, ensuring the heat exchange quality between the exhaust gas and the hollow shaft and the flowing liquid in the hollow heat-conducting rod, and one end of the hollow heat-conducting rod can swing to disturb the exhaust gas when rotating with the hollow shaft, further improving the uniformity and efficiency of heat exchange, and the swinging also helps to prevent the formation of deposits on the heat exchange surface;

[0016] 3) The present invention is also provided with an annular driving block, a collision rod 1, a wedge block 1, an elastic telescopic rod, a wedge block 2, a collision ball 1 and a collision ball 2, etc., so that when the filter inner cylinder rotates, the collision ball 1 and the collision ball 2 respectively intermittently hit the filter inner cylinder rotation and the hollow shaft, thereby making the particles attached to the inner wall of the filter inner cylinder rotation 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 particles from being attached to the outer wall of the hollow shaft to affect the heat exchange quality;

[0017] 4) The present invention is also provided with structures such as a reciprocating screw, a sealing ring, a movable ring and a bellows. The movable ring drives the bellows to cover the outer wall of the filter inner cylinder, so that the exhaust gas entering the filter inner cylinder will not pass through the filter hole and enter the gas flow cavity, and then be discharged from the exhaust pipe. In conjunction with the detection sensor, the exhaust gas can be controlled to be discharged after heat exchange to the required temperature in the filter inner cylinder, thereby improving the applicability of the treatment system and further improving the subsequent catalytic oxidation of the exhaust gas and the quality of odor treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the processing system of the present invention;

[0019] Figure 2 It is a schematic diagram of the structure of the heat exchange dust removal mechanism of the present invention;

[0020] Figure 3 For the present invention Figure 2 Structural cross-section view;

[0021] Figure 4 For the present invention Figure 3 A three-dimensional diagram of the local structure in

[0022] Figure 5 It is a schematic diagram of the hollow shaft structure of the present invention;

[0023] Figure 6 For the present invention Figure 3 A magnified schematic diagram of structure A.

[0024] In the 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 exhaust pipe; 107, hollow seat; 108, water tank; 109, hollow shaft; 110, rotating device 1; 111, gear set; 112, hollow heat conducting rod; 113, pull rope; 114, movable inner rod; 115, arc-shaped protrusion; 116, elastic 117. reciprocating screw; 118. movable ring; 119. bellows; 120. telescopic device; 121. sealing plate; 122. annular drive block; 123. impact rod one; 124. wedge block one; 125. elastic telescopic rod; 126. wedge block two; 127. detection sensor; 200. catalytic tower; 300. oxidation tower; 400. ozone generator; 500. water tank; 600. exhaust pipe. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0026] Example 1

[0027] Please see attached Figure 1

[0028] A system for coordinating waste gas particulate matter and odor in a casting drying section, comprising:

[0029] The 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, collect and utilize the heat in the exhaust gas of the casting drying section, save energy consumption, and improve the quality of subsequent treatment of the exhaust gas of the casting drying section;

[0030] The catalytic tower 200, whose air inlet end (located at the bottom of the catalytic tower 200) is connected to the exhaust end of the heat exchange dust removal mechanism 100 through a pipeline, is provided with a catalyst layer in the catalytic tower 200, and the catalyst layer is composed of a carrier-loaded metal oxide, and the carrier includes clay, molecular sieve, ceramsite, activated carbon macroporous material; the metal oxide loaded on the catalyst surface includes one or more of aluminum oxide, manganese oxide, iron oxide, tin oxide, silver oxide and other transition metal oxides; preferably a multi-metal catalyst;

[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. Of course, the catalyst layer is not limited to the above-mentioned ones;

[0032] The oxidation tower 300, whose air inlet end (located at the bottom of the oxidation tower 300) is connected to the exhaust end (located at the top of the catalytic tower 200) through a pipeline, the oxidation tower 300 is a conventional device in the art, and the top of its inner cavity has a nozzle for spraying a spray liquid;

[0033] The exhaust pipe 600, whose air inlet end is connected to the air outlet end of the oxidation tower 300 (located at the top of the oxidation tower 300) through a pipeline, is used to discharge the purified drying section exhaust gas;

[0034] A water tank 500 stores spray liquid, and a liquid outlet of the water tank 500 is connected to a liquid inlet of the oxidation tower 300 (located at the top of the oxidation tower 300) through a pipeline and a pump body; and,

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

[0036] The exhaust gas from the casting drying section passes through the heat exchange dust removal mechanism 100 for dust removal and cooling, and then enters the catalytic tower 200. The catalyst layer and ozone generate oxidizing superoxide radicals and hydroxyl radicals, and utilize their strong oxidizing properties to decompose the organic pollutants in the exhaust gas into carbon dioxide and water. The exhaust gas then enters the oxidation tower 300 for spraying treatment to remove odor in the exhaust gas, so that the exhaust gas meets the emission standards and is discharged from the exhaust chimney 600.

[0037] Preferably, fans are provided on the pipeline connecting the catalytic tower 200 and the heat exchange 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 pipe 600 of this embodiment.

[0038] Preferably, the output end of the ozone generator 400 of this embodiment is also connected to the water tank 500 through a pipeline, and the liquid inlet end of the water tank 500 is connected to the liquid discharge end of the oxidation tower 300 through a pipeline. A catalyst layer can also be set in the water tank 500 to facilitate the recycling of the spray liquid in the water tank 500.

[0039] Example 2

[0040] Please see attached Figure 2 -Attached Figure 5

[0041] Preferably, the heat exchange dust removal mechanism 100 of this embodiment includes:

[0042] The housing 101 has a hollow filter inner cylinder 102 at the top of its inner cavity rotatably provided through a bearing, and a sealing ring 104 is rotatably provided at the lower end of the outer wall of the filter inner cylinder 102 through a bearing, and the sealing ring 104 is fixedly provided on the inner wall of the housing 101, and a gas flow cavity is formed between the outer wall of the top of the sealing ring 104, the outer wall of the filter inner cylinder 102 and the inner wall of the housing 101 to allow the waste gas to flow 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 holes on the outer wall of the filter inner cylinder 102;

[0043] The air inlet pipe 103 is arranged at the top of the housing 101 and communicated with the inner cavity of the filter inner cylinder 102, and is used for the exhaust gas from the casting drying section to enter. A solenoid valve may be arranged in the air inlet pipe 103 to control the entry of the exhaust gas;

[0044] An exhaust pipe 105 is provided on the outer wall of the housing 101 and communicated with the gas flow chamber, and is used to discharge the filtered exhaust gas from the casting drying section to the catalytic tower 200. A solenoid valve may be provided in the exhaust pipe 105 to control the exhaust gas discharge; and

[0045] The liquid circulation 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 the inner cavity thereof stores liquid. A drainage pipe and a water supply port are arranged on one side of the water tank 108;

[0046] The exhaust gas from the casting drying section enters the inner cavity of the filter inner cylinder 102 through the air inlet pipe 103, then enters the gas circulation cavity after the particulate matter is removed through the filter holes, and then enters the catalytic tower 200 through the exhaust pipe 105; when the exhaust gas from 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 circulation mechanism, and the liquid enters the water tank 108 after heat exchange, and the drain pipe can be opened to use the liquid after heat exchange when needed.

[0047] Preferably, the liquid circulation mechanism of this embodiment includes:

[0048] The hollow shaft 109 is arranged 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 shell 101 and extends into the hollow seat 107. The connection between the hollow shaft 109, the shell 101 and the hollow seat 107 is provided with bearings. The bottom end of the hollow shaft 109 is connected to the water tank 108 through a pipeline. The hollow seat 107 is fixedly connected to the shell 101, and the hollow seat 107 is connected to the water tank 108 through another pipeline.

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

[0050] The movable inner rod 114 is movably arranged at the axis of the hollow shaft 109 and connected to the annular member. The movable inner rod 114 can be connected to the inner wall of the movable inner rod 114 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 of the movable inner rod 114 extends into the hollow seat 107 and is connected to the inner wall of the hollow seat 107 through an elastic connecting member 116. The elastic connecting member 116 is, for example, an elastic telescopic rod. The outer wall of the movable inner rod 114 is eccentrically connected to a ball connecting rod in contact with the bottom inner wall of the hollow seat 107. The ball connecting rod belongs to a conventional structure in the field, including a rod body and a ball embedded in one end of the rod body. 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; and,

[0051] A rotating device 110 is disposed at the top of the shell 101. The rotating device 110 is, for example, a motor. The output end of the rotating device 110 is connected to the hollow shaft 109 through a gear set 111 (two sets of meshing gears). The output end also extends to the inner side 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 gears. Through this arrangement, the filter inner cylinder 102 and the hollow shaft 109 can rotate in opposite directions to each other. On the one hand, under the action of centrifugation, the filtering quality of the filter inner cylinder 102 for the exhaust gas can be improved, and the heat exchange area between the hollow shaft 109 and the exhaust gas can be increased, thereby improving the heat exchange quality and efficiency.

[0052] When in use, the liquid in the water tank 108 enters the hollow seat 107 through the pump body, 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, by turning on the rotating device 110, the rotating device 110 drives the hollow shaft 109 to rotate through the gear set 111, and at the same time, the filter inner cylinder 102 rotates in the opposite direction of the hollow shaft 109 through the gear and the gear ring. When the hollow shaft 109 rotates, it drives the movable inner cylinder 102 to rotate in the opposite direction of the hollow shaft 109. Rod 114, the movable inner rod 114 makes the ball connecting rod intermittently contact the arc-shaped protrusion 115, and then under the action of the elastic connecting member 116, the movable inner rod 114 intermittently moves up and down relative to the hollow shaft 109, and then the annular member intermittently pulls the hollow heat-conducting rod 112 to swing through the pull rope 113, so that the exhaust gas located in the filter inner cylinder 102 exchanges heat with the hollow shaft 109 and the liquid flowing in the hollow heat-conducting rod 112, and under the action of centrifugation, the particulate matter in the exhaust gas is removed through the filter holes on the outer wall of the filter inner cylinder 102.

[0053] Preferably, the bottom of the filter inner cylinder 102 of this embodiment is provided with a dust exhaust port for the hollow shaft 109 to pass through, and the bottom of the shell 101 is provided with a dust exhaust pipe 106 coaxial with the dust exhaust port; the outer wall of the hollow shaft 109 and the movable sleeve below the dust exhaust port are provided with a sealing plate 121, and the sealing plate 121 is connected to a telescopic device 120 provided in the shell 101, and the dust exhaust port is closed or opened by the telescopic device 120. The telescopic device 120 is, for example, an electric telescopic rod. The dust exhaust port is closed by the sealing plate 121 to prevent exhaust gas from being discharged from the dust exhaust 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 exhaust port.

[0054] Preferably, the processing system of this embodiment further includes:

[0055] The annular driving block 122 has a right-angle trapezoidal vertical section. The annular driving block 122 is movably sleeved on the outer wall of the dust outlet. The inclined surface of the annular driving block 122 slides against a ball connecting rod. The ball connecting rod is L-shaped, and a ball is embedded at one end of the ball connecting rod. The ball connecting rod is connected to an impact rod 123. The impact rod 123 is vertically inserted into a protrusion arranged on the inner wall of the shell 101. The outer wall of the impact rod 123 is sleeved with an elastic member for driving it to reset upward. One end of the elastic member is connected to the outer wall of one end of the impact rod 123, and the other end is connected to the protrusion. The top of the impact rod 123 is provided with an impact ball 1 for contacting the bottom of the filter inner cylinder 102; and,

[0056] Wedge block 124 is arranged at the bottom end of impact rod 123, and the inclined surface of wedge block 124 abuts against wedge block 2 126, wedge block 2 126 is arranged on the outer wall of the movable section of elastic telescopic rod 125, and one end of elastic telescopic rod 125 is connected to the inner wall of shell 101, elastic telescopic rod 125 is used to be driven to contract by wedge block 2 126 when wedge block 124 moves downward, and one end of the movable section of elastic telescopic rod 125 is also provided with impact ball 2 for contacting the outer wall of hollow shaft 109.

[0057] When in use, the annular driving block 122 rotates with the filter inner cylinder 102, and the lowest end of the bottom of the annular driving block 122 drives the ball connecting rod downward, so that the ball connecting rod drives the impact rod 123 downward, and then the impact ball 1 is separated from the filter inner cylinder 102. When the impact rod 123 is downward, it drives the wedge block 2 126 through the wedge block 124, so that the wedge block 2 126 drives the movable section of the elastic telescopic rod 125 to move relative to its fixed section, and then the impact ball 2 is separated from the hollow shaft 109, and the lowest end of the bottom of the annular driving block 122 is staggered with the ball connecting rod. When opened, the impact rod 123 is reset under the action of the elastic member, so that the impact rod 123 drives the impact ball 1 to hit the filter inner cylinder 102, and at the same time the elastic telescopic rod 125 drives the impact ball 2 to reset and hit the hollow shaft 109, so that the filter inner cylinder 102 and the hollow shaft 109 both vibrate. On the one hand, the particles remaining on the inner wall of the filter inner cylinder 102 can move downward to the ash discharge port for subsequent discharge. On the other hand, it makes it difficult for the particles in the exhaust gas to adhere to the outer wall of the hollow shaft 109 and the hollow heat-conducting rod 112, thereby ensuring the heat exchange quality.

[0058] Preferably, a movable ring 118 is provided above the sealing ring 104 of the present embodiment, 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 tube 102. Reciprocating screws 117 are threadedly penetrated on both sides of the movable ring 118. One end of the reciprocating screw 117 is rotatably connected to the sealing ring 104, and the other end movably penetrates the top of the shell 101 and is transmission-connected to the second rotating device provided on the top of the shell 101. The second rotating device is, for example, a servo motor and a reducer, which can be transmission-connected to the two groups of reciprocating screws 117 through a sprocket transmission group (including a sprocket and a chain). When in use, the two groups of reciprocating screws 117 can be driven to rotate by the second rotating device, thereby causing the movable ring 118 to drive the bellows 1 19 upward, through the bellows 119 completely covered on the outer wall of the filter inner cylinder 102, then, the exhaust gas is allowed to enter the filter inner cylinder 102 through the intake pipe 103. After entering a proper amount of organic waste gas, the solenoid valve in the intake pipe 103 can be closed. At this time, the exhaust gas in the filter inner cylinder 102 will not pass through the filter hole and be directly discharged from the exhaust pipe 105. The exhaust gas can be allowed to stay in the filter inner cylinder 102 for a period of time, and then the rotating device 2 can be opened to make the movable ring 118 drive the bellows 119 to discharge the exhaust gas downward. This method can prolong the contact time of the exhaust 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 quality of exhaust gas heat recovery, ensure that the exhaust gas can be cooled to the required temperature, and also improve the subsequent catalytic oxidation and odor treatment quality.

[0059] Preferably, a detection sensor 127 is provided on the shell 101 of the present embodiment, and 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. The detection sensor 127 includes a temperature detection sensor 127, and the external display device is, for example, a display screen. After the bellows 119 is completely covered on the outer wall of the filter inner cylinder 102, the temperature detection sensor 127 detects the temperature of the exhaust gas in the filter inner cylinder 102 and displays it through an external display device. When the temperature is at a preset threshold, the user can control the rotating device 2 to allow the exhaust gas to enter the gas circulation cavity, and can also control the valve body in the air inlet pipe 103 to control the exhaust gas to enter the filter inner cylinder 102.

[0060] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A system for coordinating waste gas particulate matter and odor in a casting drying section, characterized in that: include: A heat exchange dust removal mechanism (100) is used to remove dust from the exhaust gas in the casting drying section and to recover the heat of the exhaust gas in the casting drying section; A catalytic tower (200), the air inlet end of which is connected to the exhaust end of the heat exchange dust removal mechanism (100) through a pipeline, and a catalyst layer is provided in the catalytic tower (200); The oxidation tower (300) has an air inlet end connected to the exhaust end of the catalytic tower (200) through a pipeline; An exhaust pipe (600), the air inlet end of which is connected to the air outlet end of the oxidation tower (300) through a pipeline; A water tank (500) stores spray liquid, and a liquid outlet of the water tank (500) is connected to a liquid inlet of the oxidation tower (300) through a pipeline and a pump body; and The ozone generator (400) has an output end connected to the ozone inlet end of the catalytic tower (200) through a pipeline.

2. The processing system according to claim 1, characterized in that: Fans are provided on the pipeline connecting the catalytic tower (200) and the heat exchange 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 pipe (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, and the liquid inlet end of the water tank (500) is connected to the liquid discharge end of the oxidation tower (300) through a pipeline. A catalyst layer is provided in the water tank (500).

4. The processing system according to any one of claims 1 to 3, characterized in that: The heat exchange dust removal mechanism (100) comprises: A shell (101) is provided with a filter inner cylinder (102) with a hollow top for rotation inside, a sealing ring (104) is rotatably sleeved on the lower end of the outer wall of the filter inner cylinder (102), the sealing ring (104) is fixedly arranged on the inner wall of the shell (101), a gas circulation cavity is formed between the outer wall of the top of the sealing ring (104), the outer wall of the filter inner cylinder (102) and the inner wall of the shell (101), and the gas circulation 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 arranged at the top of the housing (101) and is in communication with the inner cavity of the filter inner cylinder (102) for the exhaust gas from the casting drying section to enter; an exhaust pipe (105), which is disposed on the outer wall of the housing (101) and communicates with the gas flow cavity, and is used to discharge the filtered exhaust gas from the casting drying section to the catalytic tower (200); and The liquid circulation mechanism is arranged in the filter inner cylinder (102), and both ends of the mechanism are connected to the water tank (108) through pipelines, and a pump body is provided on one of the pipelines. The water tank (108) is arranged on the outer wall of the shell (101) and has liquid stored in its inner cavity.

5. The processing system according to claim 4, characterized in that: The liquid circulation mechanism comprises: 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 shell (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 pipeline; the hollow seat (107) is fixedly connected to the shell (101), and the hollow seat (107) is connected to the water tank (108) through another pipeline; A plurality of groups of hollow heat-conducting rods (112) are rotatably arranged on the outer wall of the hollow shaft (109) located on the filter inner cylinder (102) through a torsion spring rotating shaft, and the hollow heat-conducting rods (112) are connected to the inner cavity of the hollow shaft (109) through a hose, and one end of the hollow heat-conducting rod (112) away from the filter inner cylinder (102) is connected to a pull rope (113), and the pull rope (113) passes through the outer wall of the hollow shaft (109) and is connected to a ring member, and the ring member is movably arranged in the hollow shaft (109); A movable inner rod (114) is movably arranged at the axis of the hollow shaft (109) and connected to the annular member, 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) through an elastic connecting member (116), the outer wall of the movable inner rod (114) is eccentrically connected to a ball connecting rod in contact with the bottom inner wall of the hollow seat (107), and 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; and, A rotating device (110) is arranged on the top of the housing (101); the output end of the rotating device (110) is transmission-connected to the hollow shaft (109) via a gear set (111); the output end also extends to the inside of the filter inner cylinder (102) and is transmission-connected to a gear ring fixed to the inner wall of the filter inner cylinder (102) via a gear.

6. The processing system according to claim 5, characterized in that: The bottom of the filtering inner cylinder (102) is provided with a dust outlet for the hollow shaft (109) to pass through, the bottom of the shell (101) is provided with a dust outlet pipe (106) coaxial with the dust outlet, the outer wall of the hollow shaft (109) and the movable sleeve below the dust outlet is provided with a sealing plate (121), the sealing plate (121) is connected to a telescopic device (120) provided in the shell (101), and the telescopic device (120) is used to close or open the dust outlet.

7. The processing system according to claim 6, characterized in that: The processing system also includes: The annular driving block (122) has a right-angle trapezoidal vertical section, the annular driving block (122) is movably sleeved on the outer wall of the dust outlet, the inclined surface of the annular driving block (122) is slidably abutted against a ball connecting rod, the ball connecting rod is connected to an impact rod (123), the impact rod (123) is vertically inserted into a protrusion provided on the inner wall of the shell (101), the outer wall of the impact rod (123) is sleeved with an elastic member for driving it to reset upward, and the top of the impact rod (123) is provided with an impact ball (1) for contacting the bottom of the filter inner cylinder (102); and, A wedge block (124) is arranged at the bottom end of the impact rod (123), and the inclined surface of the wedge block (124) is abutted against a wedge block (126). The wedge block (126) is 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). The elastic telescopic rod (125) is used to be driven by the wedge block (126) to shrink when the wedge block (124) is downward. One end of the movable section of the elastic telescopic rod (125) is also provided with an impact ball (2) for contacting the outer wall of the hollow shaft (109).

8. The processing system according to claim 4, 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 tube (102); a reciprocating screw (117) is threadedly penetrated on both sides of the movable ring (118); one end of the reciprocating screw (117) is rotatably connected to the sealing ring (104), and the other end movably penetrates the top of the shell (101) and is transmission-connected to a second rotating device disposed on the top of the shell (101).

9. The processing system according to claim 8, 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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