Energy-saving and environmentally friendly zinc oxide pyrolysis treatment system and process

Abstract

The invention discloses an energy-saving and environmentally friendly zinc oxide pyrolysis treatment system and process, comprising a pyrolysis furnace, one side of the pyrolysis furnace is fixedly provided with an airway shield, a side of the airway shield away from the pyrolysis furnace is fixedly provided with a feed box, the feed box penetrates the airway shield and is connected to the pyrolysis furnace, one side of the airway shield is fixedly provided with a circulation device, pyrolysis oil obtained by pyrolysis gas separation is distilled, the obtained distillation residue still contains a relatively high amount of zinc, and the distillation residue is returned to the pyrolysis furnace for pyrolysis again, which can effectively improve the utilization rate of raw materials and ensure the quality of finished products of secondary zinc oxide; a movable control panel is arranged on the horizontal conveyor belt of the invention, and the conveying rate of each part of the slag is changed by changing the angle of the control panel, and the raw material components entering the pyrolysis furnace are ensured to be within a controllable range through reasonable proportioning, so that the required pyrolysis temperature and pyrolysis time are more stable.

Description

Technical Field

[0001] The invention belongs to the technical field of zinc oxide pyrolysis, and in particular relates to an energy-saving and environmentally friendly zinc oxide pyrolysis treatment system and process. Background Art

[0002] Zinc oxide is produced by heating volatile organic matter in a closed pyrolysis furnace at 300-350°C in an oxygen-free environment. The traditional process does not adequately treat the pyrolysis gas, which may result in a low zinc content in the zinc oxide. Since the spray slag produced in the pyrolysis process also contains a certain amount of zinc, mixing the slag with the raw materials for pyrolysis is a reasonable treatment method. However, the output rate of the slag is extremely unstable in the pyrolysis process, resulting in large fluctuations in the proportion of individual components in the raw materials when mixed with the raw materials, which will cause instability in the temperature and time required for pyrolysis. Summary of the invention

[0003] In order to solve the above problems existing in the prior art, the present invention aims to provide an energy-saving and environmentally friendly zinc oxide pyrolysis treatment system and process.

[0004] The technical solution adopted by the present invention is:

[0005] An energy-saving and environmentally friendly zinc oxide pyrolysis treatment system comprises a pyrolysis furnace, an airway shield is fixedly provided on one side of the pyrolysis furnace, a feed box is fixedly provided on the side of the airway shield away from the pyrolysis furnace, the feed box penetrates the airway shield and is connected to the pyrolysis furnace, a circulation device is fixedly provided on one side of the airway shield, a condensation system is fixedly provided on the side of the circulation device away from the airway shield, a pyrolysis airway is fixedly provided inside the airway shield and the circulation device, and the pyrolysis airway communicates the pyrolysis furnace and the condensation system; an oil-water separator is provided on the side of the condensation system away from the pyrolysis furnace, the oil-water separator and the condensation system are connected through a connecting channel, a pyrolysis oil outlet is fixedly provided on the side of the oil-water separator away from the condensation system, a distillation tower is provided on the side of the pyrolysis oil outlet away from the oil-water separator, the distillation tower and the pyrolysis oil outlet are connected through a pyrolysis oil pipe, an oil storage tank is provided on one side of the distillation tower, and the oil storage tank and the distillation tower are connected through an oil pipeline.

[0006] As a preferred embodiment of the present invention, a discharge port is fixedly provided on the side of the pyrolysis furnace away from the air duct shielding, a screen is fixedly provided in the feed box, a receiving plate is provided on one side of the screen, and the receiving plate is fixedly connected to the feed box; a first residue outlet is provided on the side of the distillation tower away from the oil-water separator, a transfer vehicle is provided on the side of the first residue outlet away from the oil-water separator, a horizontal conveyor belt is provided on one side of the transfer vehicle, and a lifting conveyor belt is provided between the horizontal conveyor belt and the feed box.

[0007] As a preferred embodiment of the present invention, a water film dust removal box is provided on one side of the pyrolysis furnace, and the water film dust removal box and the pyrolysis furnace are connected by an indirect heating pipe, and the indirect heating pipe passes through the air duct protective shell; a spray box is provided on one side of the water film dust removal box, and the spray box and the water film dust removal box are connected by a lifting pipe, and a steam-water separator is provided on the side of the spray box away from the water film dust removal box, and the steam-water separator and the spray box are connected by a connecting pipe; a purification hood is fixedly provided on one side of the steam-water separator, and an exhaust pipe is fixedly provided on the side of the purification hood away from the steam-water separator.

[0008] As a preferred embodiment of the present invention, a wastewater outlet is fixedly provided on the side of the oil-water separator away from the spray box, and the wastewater outlet and the water film dust removal box are connected via a wastewater pipe; a hot air furnace is provided between the water film dust removal box and the pyrolysis furnace, and the hot air furnace is connected to the pyrolysis furnace via an air inlet pipe, and the circulation device is connected to the hot air furnace via a gas recovery pipe, and a gas supply pipe is fixedly provided at one end of the hot air furnace.

[0009] As a preferred embodiment of the present invention, the horizontal conveyor belt is detachably mounted on a side baffle, and the side baffle is located on the side of the water film dust removal box away from the pyrolysis furnace; the steam-water separator is fixedly provided with a second residue outlet on the side close to the side baffle, the spray box is fixedly provided with a third residue outlet on the side close to the side baffle, and the water film dust removal box is fixedly provided with a fourth residue outlet on the side close to the side baffle.

[0010] As a preferred embodiment of the present invention, a guide plate is provided on one side of the lifting conveyor belt, the guide plate is fixedly connected to the side baffle, and an entry groove is fixedly provided on one end of the side baffle close to the lifting conveyor belt; two control panels are provided on the horizontal conveyor belt, and the two control panels correspond to the second residue outlet and the third residue outlet respectively.

[0011] As a preferred embodiment of the present invention, the control panel is fixedly arranged on a rotating shaft, a control motor is provided on one side of the rotating shaft, the output shaft of the control motor is fixedly connected to the rotating shaft, a plurality of cut-off plates are provided on one side of the control panel, and the cut-off plates are located on a side of the control panel away from the pyrolysis furnace; the rotating shaft passes through the horizontal conveyor belt, and the control motor is fixedly connected to the side baffle.

[0012] As a preferred embodiment of the present invention, the transfer vehicle includes a sliding plate, which is slidably set on a ground rail, a telescopic cylinder is provided on the side of the sliding plate away from the ground rail, the sliding plate is fixedly connected to the cylinder barrel of the telescopic cylinder, a transfer box is fixedly provided on the piston rod of the telescopic cylinder, and the transfer box cooperates with the first residue outlet.

[0013] As a preferred embodiment of the present invention, a movable plate is provided on one side of the transfer box, the movable plate is hinged to the transfer box, a mounting frame is fixedly provided on the side baffle, a top tongue is fixedly provided on one end of the mounting frame close to the ground rail, and the top tongue cooperates with the movable plate.

[0014] An energy-saving and environmentally friendly zinc oxide pyrolysis treatment process comprises the following steps:

[0015] S1, pyrolysis; placing the zinc-containing paint residue as raw material from the feed box into the pyrolysis furnace, using a hot air furnace to pyrolyze and gasify the zinc-containing paint residue to generate pyrolysis gas and secondary zinc oxide, and generate indirect heating flue gas;

[0016] S2, temporary storage; temporarily storing the secondary zinc oxide generated in step S1;

[0017] S3, indirect heating flue gas treatment: for the indirect heating flue gas generated in step S1, the gas components therein are sequentially passed through a water film dust removal box, a spray box, a steam-water separator and a purification hood, and finally discharged from an exhaust pipe;

[0018] S4, spray slag treatment: In step S3, the water film dust removal box, the spray box, and the steam-water separator all produce spray slag, which then enters the horizontal conveyor belt, and the spray slag is lifted by the lifting conveyor belt and returned to the pyrolysis furnace to be pyrolyzed together with the raw materials;

[0019] S5, pyrolysis gas treatment; the pyrolysis gas generated in step S1 is passed through a condensation system and an oil-water separator in sequence to generate pyrolysis oil and oily wastewater, and the oily wastewater follows the indirect heating flue gas and enters the water film dust removal box in step S3;

[0020] S6, condensed water circulation; the condensed water generated by the condensation system in step S5 circulates itself in the circulation device, and the generated non-condensable gas enters the hot air furnace in step S1 and is burned as fuel;

[0021] S7, pyrolysis oil distillation; the pyrolysis oil produced in step S5 enters a distillation tower to produce pyrolysis fuel oil and distillation residue, wherein the pyrolysis fuel oil enters an oil storage tank for storage, and the distillation residue returns to the pyrolysis furnace to be pyrolyzed together with the raw materials.

[0022] The beneficial effects of the present invention are as follows: as an energy-saving and environmentally friendly zinc oxide pyrolysis treatment system and process, the present invention distills the pyrolysis oil obtained by separating the pyrolysis gas, and the obtained distillation residue still contains a relatively high amount of zinc. The residue is returned to the pyrolysis furnace for further pyrolysis, which can effectively improve the utilization rate of raw materials and ensure the quality of the finished product of secondary zinc oxide; a movable control panel is arranged on the horizontal conveyor belt of the present invention, and the conveying rate of each part of the slag material is changed by changing the angle of the control panel, and the raw material components entering the pyrolysis furnace are ensured to be within a controllable range through reasonable proportioning, so that the required pyrolysis temperature and pyrolysis time are more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0024] Figure 1 It is a schematic diagram of the structure of the present invention;

[0025] Figure 2 The present invention Figure 1 A schematic diagram of the front view structure of

[0026] Figure 3 The present invention Figure 1 A schematic diagram of a top view structure;

[0027] Figure 4 The present invention Figure 1 Schematic diagram of the left view structure;

[0028] Figure 5 The present invention Figure 1 A rear view structural diagram of ;

[0029] Figure 6 The present invention Figure 1 Schematic diagram of the feed box structure;

[0030] Figure 7 The present invention Figure 3 Schematic diagram of the control panel structure;

[0031] Figure 8 The present invention Figure 1 Schematic diagram of the relevant structure of the transfer vehicle;

[0032] Fig. 9 It is a schematic diagram of the pyrolysis process of the present invention. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical scheme and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention, that is, the embodiments described are only part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0034] 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 invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention.

[0035] Combine the following Figure 1-9 The specific embodiment of the present invention is described, an energy-saving and environmentally friendly zinc oxide pyrolysis treatment system, comprising a pyrolysis furnace 11, a gas channel shield 12 is fixedly provided on one side of the pyrolysis furnace 11, a feed box 13 is fixedly provided on the side of the gas channel shield 12 away from the pyrolysis furnace 11, the feed box 13 penetrates the gas channel shield 12 and is connected to the pyrolysis furnace 11, a circulation device 33 is fixedly provided on one side of the gas channel shield 12, a condensation system 32 is fixedly provided on the side of the circulation device 33 away from the gas channel shield 12, a pyrolysis gas channel is fixedly provided inside the gas channel shield 12 and the circulation device 33, and the pyrolysis gas channel communicates with the The pyrolysis furnace 11 and the condensation system 32; the condensation system 32 is provided with an oil-water separator 30 on the side away from the pyrolysis furnace 11, and the oil-water separator 30 and the condensation system 32 are connected through a connecting channel 35. The oil-water separator 30 is fixedly provided with a pyrolysis oil outlet 29 on the side away from the condensation system 32, and the pyrolysis oil outlet 29 is provided with a distillation tower 27 on the side away from the oil-water separator 30, and the distillation tower 27 and the pyrolysis oil outlet 29 are connected through a pyrolysis oil pipe 18. An oil storage tank 24 is provided on one side of the distillation tower 27, and the oil storage tank 24 and the distillation tower 27 are connected through an oil pipeline 23. The pyrolysis oil obtained by separating the pyrolysis gas is distilled, and the obtained distillation residue still contains a high content of zinc. It is returned to the pyrolysis furnace 11 for pyrolysis again, which can effectively improve the utilization rate of raw materials and ensure the quality of the finished product of secondary zinc oxide.

[0036] Advantageously, a discharge port 34 is fixedly provided on the side of the pyrolysis furnace 11 away from the gas channel casing 12, a screen 51 is fixedly provided in the feed box 13, a receiving plate 50 is provided on one side of the screen 51, and the receiving plate 50 is fixedly connected to the feed box 13; a first residue outlet 28 is provided on the side of the distillation tower 27 away from the oil-water separator 30, a transfer vehicle 26 is provided on the side of the first residue outlet 28 away from the oil-water separator 30, a horizontal conveyor belt 25 is provided on one side of the transfer vehicle 26, and a lifting conveyor belt 36 is provided between the horizontal conveyor belt 25 and the feed box 13. A baffle is provided on the surface of the lifting conveyor belt 36, and raw materials and slag can be transported by the lifting conveyor belt 36.

[0037] Advantageously, a water film dust removal box 16 is provided on one side of the pyrolysis furnace 11, and the water film dust removal box 16 and the pyrolysis furnace 11 are connected via an indirect heating pipe 15, and the indirect heating pipe 15 passes through the air duct shield 12; a spray box 19 is provided on one side of the water film dust removal box 16, and the spray box 19 and the water film dust removal box 16 are connected via a lifting pipe 49, and a steam-water separator 22 is provided on the side of the spray box 19 away from the water film dust removal box 16, and the steam-water separator 22 and the spray box 19 are connected via a connecting pipe 44; a purification hood 21 is fixedly provided on one side of the steam-water separator 22, and an exhaust pipe 20 is fixedly provided on the side of the purification hood 21 away from the steam-water separator 22.

[0038] Beneficially, a wastewater outlet 31 is fixedly provided on the side of the oil-water separator 30 away from the spray box 19, and the wastewater outlet 31 and the water film dust removal box 16 are connected via a wastewater pipe 17; a hot air furnace 43 is provided between the water film dust removal box 16 and the pyrolysis furnace 11, and the hot air furnace 43 is connected to the pyrolysis furnace 11 via an air intake pipe 41, and the circulation device 33 is connected to the hot air furnace 43 via a gas recovery pipe 14, and a gas supply pipe 42 is fixedly provided at one end of the hot air furnace 43.

[0039] Beneficially, the horizontal conveyor belt 25 is detachably mounted on a side baffle 46, and the side baffle 46 is located on a side of the water film dust removal box 16 away from the pyrolysis furnace 11; a second residue outlet 45 is fixedly provided on a side of the steam-water separator 22 close to the side baffle 46, a third residue outlet 47 is fixedly provided on a side of the spray box 19 close to the side baffle 46, and a fourth residue outlet 48 is fixedly provided on a side of the water film dust removal box 16 close to the side baffle 46.

[0040] Advantageously, a guide plate 38 is provided on one side of the lifting conveyor belt 36, and the guide plate 38 is fixedly connected to the side baffle 46, and an entry groove 37 is fixedly provided on one end of the side baffle 46 close to the lifting conveyor belt 36; two control panels 39 are provided on the horizontal conveyor belt 25, and the two control panels 39 correspond to the second residue outlet 45 and the third residue outlet 47 respectively.

[0041] Advantageously, the control panel 39 is fixedly arranged on the rotating shaft 52, a control motor 53 is arranged on one side of the rotating shaft 52, the output shaft of the control motor 53 is fixedly connected to the rotating shaft 52, a plurality of intercepting plates 54 are arranged on one side of the control panel 39, and the intercepting plates 54 are located on the side of the control panel 39 away from the pyrolysis furnace 11; the rotating shaft 52 passes through the horizontal conveyor belt 25, and the control motor 53 is fixedly connected to the side baffle 46. The control panel 39 has an angle with the conveying direction, and different angles have different intercepting effects on the slag, thereby realizing a reasonable proportion of the conveying of each part of the slag.

[0042] Advantageously, the transfer vehicle 26 includes a sliding plate 58, which is slidably disposed on a ground rail 57. A telescopic cylinder 59 is provided on the side of the sliding plate 58 away from the ground rail 57. The sliding plate 58 is fixedly connected to the cylinder barrel of the telescopic cylinder 59. A transfer box 60 is fixedly disposed on the piston rod of the telescopic cylinder 59, and the transfer box 60 cooperates with the first residue outlet 28.

[0043] Advantageously, a movable plate 56 is provided on one side of the transfer box 60, and the movable plate 56 is hinged to the transfer box 60. A mounting frame 55 is fixedly provided on the side baffle 46, and a top tongue 40 is fixedly provided on one end of the mounting frame 55 close to the ground rail 57, and the top tongue 40 cooperates with the movable plate 56.

[0044] An energy-saving and environmentally friendly zinc oxide pyrolysis treatment process comprises the following steps:

[0045] S1, pyrolysis; the zinc-containing paint residue is placed as a raw material from the feed box 13 into the pyrolysis furnace 11, and the zinc-containing paint residue is pyrolyzed and gasified by the hot air furnace 43 to generate pyrolysis gas and secondary zinc oxide, and generate indirect heating flue gas;

[0046] S2, temporary storage; temporarily storing the secondary zinc oxide generated in step S1;

[0047] S3, indirect heating flue gas treatment: for the indirect heating flue gas generated in step S1, the gas components therein are sequentially passed through the water film dust removal box 16, the spray box 19, the steam-water separator 22 and the purification hood 21, and finally discharged from the exhaust pipe 20;

[0048] S4, spray slag treatment: In step S3, the water film dust removal box 16, the spray box 19, and the steam-water separator 22 all produce spray slag, which then enters the horizontal conveyor belt 25, and the spray slag is lifted by the lifting conveyor belt 36 and returned to the pyrolysis furnace 11 to be pyrolyzed together with the raw materials;

[0049] S5, pyrolysis gas treatment; the pyrolysis gas generated in step S1 passes through the condensation system 32 and the oil-water separator 30 in sequence to generate pyrolysis oil and oily wastewater, and the oily wastewater follows the indirect heating flue gas and enters the water film dust removal box 16 in step S3;

[0050] S6, condensed water circulation; the condensed water generated by the condensation system 32 in step S5 is self-circulated in the circulation device 33, and the non-condensable gas generated enters the hot air furnace 43 in step S1 and is burned as fuel;

[0051] S7, pyrolysis oil distillation; the pyrolysis oil produced in step S5 enters the distillation tower 27 to produce pyrolysis fuel oil and distillation residue, wherein the pyrolysis fuel oil enters the oil storage tank 24 for storage, and the distillation residue returns to the pyrolysis furnace 11 to be pyrolyzed together with the raw materials.

[0052] Working principle of the present invention:

[0053] The raw material is zinc-containing paint residue, the main component of which is zinc oxide, wherein the zinc content is 40% of the connecting channel 35-top tongue; the raw material is placed on a continuously running lifting conveyor belt 36, enters the feed box 13 through the lifting action of the lifting conveyor belt 36, and enters the screen 51 through the receiving action of the receiving plate 50, the screen 51 is connected to the vibration motor, and the vibration motor is started, and the raw material can easily pass through the screen 51; wherein the filling into the pyrolysis furnace 11 is periodic filling, and an electrically controlled shielding door is provided at the feed port of the pyrolysis furnace 11, which is closed when the pyrolysis furnace 11 is running, and is opened when the pyrolysis furnace 11 is filled, and after the electrically controlled shielding door is opened, the raw material passes through the screen 51 and enters the inside of the pyrolysis furnace 11.

[0054] In the initial stage of operation of the pyrolysis system, natural gas is introduced from the gas pipeline 42 into the hot blast furnace 43 for combustion as fuel.

[0055] The hot air furnace heats the air to 50°C from the oil-water separator 300 to the connecting channel 3 receiving plate, and sends the hot air into the pyrolysis furnace 11 through the air inlet pipe 41. The pyrolysis furnace 11 is running, and the zinc-containing paint residue in the pyrolysis furnace 11 is heated in an oxygen-free environment, and the organic matter is volatilized to generate secondary zinc oxide and some solid waste, and the zinc content of the secondary zinc oxide is 65-70%. At the same time, pyrolysis gas is generated, and indirect heating flue gas is generated, and the pyrolysis furnace 11 generates a noise source when it is working.

[0056] The pyrolysis gas enters the circulation device 33 through the pyrolysis gas duct. The temperature of the high-temperature pyrolysis gas decreases after passing through the circulation device 33, and then enters the oil-water separator 30 through the connecting channel 35. After the action of the oil-water separator 30, the generated pyrolysis oil is discharged from the pyrolysis oil outlet 29, and the generated waste water is discharged from the waste water outlet 31, and a water-type pollution source is generated; in this process, the circulation device 33 is provided with condensed water by an external cold water source and circulates it. During the condensation process, the generated non-condensable gas is returned to the hot air furnace 43 through the fuel gas recovery pipe 14 and burned as fuel instead of natural gas. At this time, the amount of natural gas introduced can be appropriately reduced; water-type pollution sources are generated during the circulation of condensed water.

[0057] The pyrolysis oil is discharged from the pyrolysis oil outlet 29 and enters the distillation tower 27 through the pyrolysis oil pipe 18 for distillation. The generated pyrolysis fuel oil enters the oil storage tank 24 through the oil pipeline 23 and is directly stored. The distillation residue generated by the distillation still contains a certain amount of zinc.

[0058] The driving structure installed on the sliding plate 58 is used to move the transfer box 60 to the first residue outlet 28. After the first residue outlet 28 is opened, the telescopic cylinder 59 is started, and the telescopic cylinder 59 controls its piston rod to extend, and the transfer box 60 enters the first residue outlet 28, and the distilled residue enters the transfer vehicle 26; during this process, the movable plate 56 remains vertical due to its gravity, and the distilled residue will not cause the movable plate 56 to rotate; after the telescopic cylinder 59 controls the transfer box 60 to reset, the driving structure controls the transfer box 60 to move to the horizontal conveyor belt 25, and the telescopic cylinder 59 is started again, and the transfer box 60 moves toward the horizontal conveyor belt 25. When the movable plate 56 abuts against the top tongue 40, the telescopic cylinder 59 continues to control its piston rod to extend, and the upper end of the movable plate 56 is subjected to pressure to cause the movable plate 56 to rotate around its hinge axis. Because the interior of the transfer box 60 is designed as a slightly inclined structure, when the movable plate 56 rotates, all the distilled residue inside the transfer box 60 slides onto the horizontal conveyor belt 25.

[0059] The horizontal conveyor belt 25 is controlled by a motor to run continuously, and the distillation residue gradually approaches the lifting conveyor belt 36. Under the guidance of the guide plate 38, the distillation residue gathers at the entry groove 37, and then falls on the lifting conveyor belt 36, and enters the feed box 13 together with the raw materials.

[0060] The indirect heating flue gas generated by the pyrolysis furnace 11 and the waste water generated by the oil-water separator 30 both contain a certain amount of zinc. Both are introduced into the water film dust removal box 16, and a part of spray slag is obtained after the water film dust removal treatment of the water film dust removal box 16, and the remaining flue gas is introduced into the spray box 19 through the lifting pipe 49, and the flue gas is sprayed in the spray box 19 to obtain spray slag and generate some water-type pollution sources; the water content of the indirect heating flue gas increases after water film dust removal and alkali solution spraying, and the flue gas with a high water content discharged from the spray box 19 enters the steam-water separator 22 through the connecting pipe 44 for gas-water separation, and the gas is finally treated and tested by the purification hood 21 and then discharged from the exhaust pipe 20; in the steam-water separator 22, spray slag is generated and generates some water-type pollution sources; the three parts of spray slag are respectively discharged from the second residue outlet 45, the third residue outlet 47 and the fourth residue outlet 48 into the horizontal conveyor belt 25; the generation of zinc-containing spray slag is accompanied by the generation of a small amount of solid waste, and the spray slag can preliminarily screen the solid waste during the transportation process.

[0061] It should be noted that there are obvious differences in the output rates of the three parts of the spray slag, and the differences will change periodically as the pyrolysis system operates. At this time, the sensor is used to analyze and determine the spray slag output rate corresponding to the fourth residue outlet 48, and the two control motors 53 are controlled to start respectively. The control motor 53 controls the rotation of the rotating shaft 52, and the control plate 39 and the intercepting plate 54 rotate together with the rotating shaft 52. The two control plates 39 are rotated to the desired angles respectively. Under the action of the intercepting plate 54, the different angles of the control plate 39 affect the conveying speed of the spray slag at the corresponding position. When the included angle between the control plate 39 and the side baffle 46 is ninety degrees, the spray slag at the corresponding position is almost not transported downstream with the horizontal conveyor belt 25, but is accumulated on the side of the control plate 39 upstream of the horizontal conveyor belt 25. The smaller the acute angle between the control plate 39 and the side baffle 46, the smaller the accumulation effect of the control plate 39 on the spray slag.

[0062] Through reasonable calculation by the control center, the three parts of spray slag are introduced into the lifting conveyor belt 36 in a certain proportion and mixed with the raw materials, so as to ensure that the composition of the pyrolysis raw materials in the pyrolysis furnace 11 is within a stable range, and there is no need for the hot blast furnace 43 to frequently change the temperature to adapt to the changes in the raw material composition in the pyrolysis furnace 11.

[0063] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0064] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims of this application, they should all fall within the protection scope of the present invention.

Claims

1. An energy-saving and environmentally friendly zinc oxide pyrolysis treatment system, characterized by: A pyrolysis furnace is included, wherein an airway shield is fixedly provided on one side of the pyrolysis furnace, a feed box is fixedly provided on the side of the airway shield away from the pyrolysis furnace, the feed box penetrates the airway shield and is connected to the pyrolysis furnace, a circulation device is fixedly provided on one side of the airway shield, a condensation system is fixedly provided on the side of the circulation device away from the airway shield, a pyrolysis airway is fixedly provided inside the airway shield and the circulation device, and the pyrolysis airway communicates the pyrolysis furnace and the condensation system; an oil-water separator is provided on the side of the condensation system away from the pyrolysis furnace, the oil-water separator and the condensation system are connected through a connecting channel, a pyrolysis oil outlet is fixedly provided on the side of the oil-water separator away from the condensation system, a distillation tower is provided on the side of the pyrolysis oil outlet away from the oil-water separator, the distillation tower and the pyrolysis oil outlet are connected through a pyrolysis oil pipe, an oil storage tank is provided on one side of the distillation tower, and the oil storage tank and the distillation tower are connected through an oil pipeline; A water film dust removal box is provided on one side of the pyrolysis furnace, and the water film dust removal box and the pyrolysis furnace are connected by an indirect heating pipe, and the indirect heating pipe runs through the airway protective shell; a spray box is provided on one side of the water film dust removal box, and the spray box and the water film dust removal box are connected by a lifting pipe, and a steam-water separator is provided on the side of the spray box away from the water film dust removal box, and the steam-water separator and the spray box are connected by a connecting pipe; a purification hood is fixedly provided on one side of the steam-water separator, and an exhaust pipe is fixedly provided on the side of the purification hood away from the steam-water separator; A discharge port is fixedly provided on the side of the pyrolysis furnace away from the gas channel shield, a screen is fixedly provided in the feed box, a receiving plate is provided on one side of the screen, and the receiving plate is fixedly connected to the feed box; a first residue outlet is provided on the side of the distillation tower away from the oil-water separator, a transfer vehicle is provided on the side of the first residue outlet away from the oil-water separator, a horizontal conveyor belt is provided on one side of the transfer vehicle, and a lifting conveyor belt is provided between the horizontal conveyor belt and the feed box; A wastewater outlet is fixedly provided on the side of the oil-water separator away from the spray box, and the wastewater outlet and the water film dust removal box are connected through a wastewater pipe; a hot air furnace is provided between the water film dust removal box and the pyrolysis furnace, and the hot air furnace is connected to the pyrolysis furnace through an air intake pipe, and the circulation device is connected to the hot air furnace through a gas recovery pipe, and a gas supply pipe is fixedly provided at one end of the hot air furnace.

2. The energy-saving and environmentally friendly zinc oxide pyrolysis treatment system according to claim 1 is characterized in that: The horizontal conveyor belt is detachably mounted on a side baffle, and the side baffle is located on a side of the water film dust removal box away from the pyrolysis furnace; a second residue outlet is fixedly provided on a side of the steam-water separator close to the side baffle, a third residue outlet is fixedly provided on a side of the spray box close to the side baffle, and a fourth residue outlet is fixedly provided on a side of the water film dust removal box close to the side baffle.

3. The energy-saving and environmentally friendly zinc oxide pyrolysis treatment system according to claim 2 is characterized in that: A guide plate is provided on one side of the lifting conveyor belt, and the guide plate is fixedly connected to the side baffle. An entry groove is fixedly provided on one end of the side baffle close to the lifting conveyor belt; two control panels are provided on the horizontal conveyor belt, and the two control panels correspond to the second residue outlet and the third residue outlet respectively.

4. The energy-saving and environmentally friendly zinc oxide pyrolysis treatment system according to claim 3 is characterized in that: The control panel is fixedly arranged on the rotating shaft, a control motor is provided on one side of the rotating shaft, the output shaft of the control motor is fixedly connected to the rotating shaft, a plurality of intercepting plates are provided on one side of the control panel, and the intercepting plates are located on the side of the control panel away from the pyrolysis furnace; the rotating shaft passes through the horizontal conveyor belt, and the control motor is fixedly connected to the side baffle.

5. The energy-saving and environmentally friendly zinc oxide pyrolysis treatment system according to claim 2, characterized in that: The transfer vehicle includes a sliding plate, which is slidably arranged on a ground rail. A telescopic cylinder is provided on the side of the sliding plate away from the ground rail. The sliding plate is fixedly connected to the cylinder barrel of the telescopic cylinder. A transfer box is fixedly provided on the piston rod of the telescopic cylinder, and the transfer box cooperates with the first residue outlet.

6. The energy-saving and environmentally friendly zinc oxide pyrolysis treatment system according to claim 5, characterized in that: A movable plate is provided on one side of the transfer box, and the movable plate is hinged to the transfer box. A mounting frame is fixedly provided on the side baffle, and a top tongue is fixedly provided on one end of the mounting frame close to the ground rail, and the top tongue cooperates with the movable plate.

7. An energy-saving and environmentally friendly zinc oxide pyrolysis treatment process, using an energy-saving and environmentally friendly zinc oxide pyrolysis treatment system as described in any one of claims 1 to 6, characterized in that: The following steps are involved: S1, pyrolysis; The zinc-containing paint residue is placed as a raw material from a feed box into a pyrolysis furnace, and the zinc-containing paint residue is pyrolyzed and gasified by a hot air furnace to generate pyrolysis gas and secondary zinc oxide, and generate indirect heating flue gas; S2, temporary storage; temporarily storing the zinc oxide produced in step S1; S3, indirect heating flue gas treatment: for the indirect heating flue gas generated in step S1, the gas components therein are sequentially passed through a water film dust removal box, a spray box, a steam-water separator and a purification hood, and finally discharged from an exhaust pipe; S4, spray slag treatment: In step S3, the water film dust removal box, the spray box, and the steam-water separator all produce spray slag, which then enters the horizontal conveyor belt, and the spray slag is lifted by the lifting conveyor belt and returned to the pyrolysis furnace to be pyrolyzed together with the raw materials; S5, pyrolysis gas treatment; the pyrolysis gas generated in step S1 is passed through a condensation system and an oil-water separator in sequence to generate pyrolysis oil and oily wastewater, and the oily wastewater follows the indirect heating flue gas and enters the water film dust removal box in step S3; S6, condensed water circulation; the condensed water generated by the condensation system in step S5 circulates itself in the circulation device, and the generated non-condensable gas enters the hot air furnace in step S1 and is burned as fuel; S7, pyrolysis oil distillation; the pyrolysis oil produced in step S5 enters a distillation tower to produce pyrolysis fuel oil and distillation residue, wherein the pyrolysis fuel oil enters an oil storage tank for storage, and the distillation residue returns to the pyrolysis furnace to be pyrolyzed together with the raw materials.

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