Aluminum-plastic separation and recovery equipment

Abstract

The invention discloses aluminum-plastic separation and recovery equipment, and relates to the technical field of aluminum-plastic separation, the aluminum-plastic separation and recovery equipment comprises a soaking separation tank, a pretreatment bin is fixed at the lower end of the soaking separation tank, a storage bin is arranged at the upper end in the pretreatment bin, and a sieve tray is correspondingly arranged above an opening of the soaking separation tank; the device disclosed by the invention has the effects that dissolved aluminum solution is rapidly discharged at a fixed point, and aluminum oxide formed in the aluminum solution is subjected to hydrochloric acid reaction treatment, so that on one hand, the influence of a gradually saturated dissolving solution on the prolonging of a reaction period is avoided, and continuous and non-weakened reaction is ensured; and on the other hand, the dissolved aluminum solution is rapidly discharged at a fixed point, and aluminum oxide formed in the aluminum solution is subjected to hydrochloric acid reaction treatment, so that the aluminum oxide is prevented from further reacting with sodium hydroxide to produce meta-aluminate radicals and further cause aluminum consumption.

Description

Technical Field

[0001] The invention relates to the technical field of aluminum-plastic separation, in particular to an aluminum-plastic separation and recycling device. Background Art

[0002] The traditional aluminum-plastic separation method is: take the waste aluminum-plastic products, clean and break them, and then soak them in a separation tank. The separation tank contains an alkaline solution that can react with aluminum to dissolve the aluminum, thereby separating the aluminum and plastic. The general soaking cycle is 8 hours, during which the alkaline solution (sodium hydroxide) needs to be replaced regularly. After separation, the plastic forms particles, while the aluminum exists in a dissolved state. The aluminum solution will be directly used in chemical production. At the same time, when necessary, metallic magnesium can also be used to replace the free aluminum with aluminum substances (the value of aluminum is far lower than that of magnesium, so replacement is generally not chosen).

[0003] At present, the method of separating aluminum and plastic by immersion is more economical and cost-effective, so it is widely used, but there are also some corresponding problems: The period of immersion separation is long, mainly because a large number of aluminum-plastic products sink into the alkaline solution, and the aluminum in the area where the aluminum-plastic products gather is dissolved after the reaction, and the dissolved aluminum exists in the alkaline solution in a free state. Due to the large molecular weight of aluminum, it often exists at the bottom of the solution, which leads to the gradual saturation of the solution in the concentrated area of ​​aluminum-plastic products, resulting in a relatively slow reaction, which further increases the separation period of aluminum-plastic products. After separating aluminum and plastic by the traditional immersion method, generally, since there is very little aluminum in the aluminum solution, it will not be further processed. Generally, it will be processed only after enough aluminum solution is stored. However, when storing aluminum-containing sodium hydroxide solution, it will inevitably come into contact with gas. Once aluminum reacts with oxygen to form aluminum oxide, it will further react with sodium hydroxide to produce aluminate, which will further cause aluminum to be consumed.

[0004] In view of the above problems, it is urgent to carry out innovative design based on the original aluminum-plastic separation and recycling equipment. Summary of the invention

[0005] The technical solution of the present invention aims at the technical problem that the existing technical solutions are too single, and provides a solution that is significantly different from the existing technologies. Specifically, the purpose of the present invention is to provide an aluminum-plastic separation and recovery device to solve the problem that the immersion separation cycle is long proposed in the above-mentioned background technology. This is mainly because a large number of aluminum-plastic products sink into the alkaline solution, and the aluminum-plastic concentrated area is dissolved after the reaction, and the dissolved aluminum exists in the alkaline solution in a dissolved free state. Since the aluminum molecule has a large mass and often exists at the bottom of the solution, this causes the solution in the aluminum-plastic concentrated area to be gradually saturated, resulting in a relatively slow reaction, which further increases the separation cycle of the aluminum-plastic.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an aluminum-plastic separation and recovery device, comprising an immersion separation tank, a pretreatment bin is fixed at the lower end of the immersion separation tank, and a storage bin is arranged at the upper end inside the pretreatment bin, a sieve plate is arranged correspondingly above the opening of the immersion separation tank, and double gear sets are symmetrically installed on both sides of the pretreatment bin, and the double gear set is composed of two large and small gears stacked and fixed, an adaptive opening component is installed between the double gear set and the storage bin, and an adaptive connecting component is symmetrically arranged between the immersion separation tank and the pretreatment bin, and a one-way transmission mechanism is symmetrically installed between the two sides of the sieve plate and the two double gear sets, and a central axis with an end installed inside the pretreatment bin is passed through the center of the immersion separation tank.

[0007] Preferably, the outer wall of the central axis located inside the pretreatment bin is provided with stirring rods at equal intervals, and the outer wall of the central axis located inside the immersion separation tank is provided with threads matching the screw holes at the center of the sieve plate, and the sieve plate is threadedly connected to the central axis.

[0008] Preferably, the adaptive opening component includes a liquid outlet and a baffle, and the liquid outlet is symmetrically opened at the lower end of the storage bin, the lower end of the liquid outlet is sealed with a baffle that slides through the pretreatment bin, and the end of the baffle is fitted and connected to the rack of the large gear.

[0009] Preferably, a first spring is wound around the outer wall of the baffle, one end of the first spring is welded to the end of the baffle, and the other end of the first spring is fixed to the outer wall of the pre-treatment chamber.

[0010] Preferably, the one-way transmission mechanism includes a lifting plate, a guide plate, a tooth block, a transmission gear, an inner turntable, a groove, a rotating plate and a fourth spring, and a lifting plate is symmetrically fixed to the upper end of the sieve plate, and the lower end of the lifting plate passes through a guide plate fixed on the side wall of the immersion separation tank, and tooth blocks are arranged at equal intervals on the inner side of the lower end of the lifting plate, the pinion of the double gear set is meshingly connected with the transmission gear, and the inner part of the transmission gear is matched with the inner turntable, an internal gear is fixed on one side of the central axis of the inner turntable, and the internal gear is meshingly connected with the lifting plate through the tooth block, the outer wall of the inner turntable is hinged with a rotating plate at equal angles, and one end of the fourth spring is welded to the outer wall of the rotating plate, and the other end of the fourth spring is fixed to the outer wall of the inner turntable, the inner wall of the transmission gear is provided with grooves at equal angles, and the end of the rotating plate is pressed against the inner wall of the groove.

[0011] Preferably, a second spring is wound around the outer wall of the lifting plate, one end of the second spring is welded to a fixing block on the outer wall of the lifting plate, and the other end of the second spring is fixed to the outer wall of the guide plate.

[0012] Preferably, the adaptive connecting component includes a valve, a three-way groove and a liquid inlet pipe, and the lower end of the immersion and separation tank is symmetrically provided with through holes, and the inside of the through holes is sealed with a valve, the inside of the valve is provided with a three-way groove, and the upper end opening of the three-way groove is located inside the through hole, the upper end of the liquid inlet pipe is slidably inserted into the inside of the lower end opening of the three-way groove, and the lower end of the liquid inlet pipe is through-connected with the pretreatment chamber, and the outer end of the valve is fit-connected with the rack of the large gear.

[0013] Preferably, a third spring is provided between the valve and the pretreatment chamber, and the upper and lower ends of the third spring are respectively fixed to the upper surface of the pretreatment chamber and the lower surface of the valve.

[0014] Compared with the prior art, the present invention has the following beneficial effects: A large amount of cleaned and broken aluminum-plastic materials are placed in the sieve plate. When the mass of the aluminum-plastic materials in the sieve plate reaches a certain level, the sieve plate begins to fall and gradually sinks under the liquid surface in the immersion separation tank. At the same time, when the sieve plate falls, it will synchronously drive the lifting plates on both sides to fall and rotate and compress the second spring, and synchronously drive the inner gear and the inner turntable to adaptively rotate clockwise through the meshing action with the inner gear. When the inner turntable rotates clockwise, the transmission gear will not rotate, so the sieve plate will smoothly fall into the bottom of the immersion separation tank as shown in the figure. As the name suggests, filter holes are evenly opened on the outer wall of the sieve plate to allow the solution to pass smoothly. As the reaction proceeds, the alkaline solution gradually dissolves and separates the aluminum in the aluminum-plastic material, and the separated aluminum is mixed in the alkaline solution. Therefore, the weight of the aluminum-plastic material on the sieve plate gradually decreases, and when the weight reduction on the sieve plate is not enough to overcome the resistance of the second springs on both sides and their matching parts, the sieve plate begins to move vertically upward along the inner wall of the immersion separation tank to reset, and when the sieve plate moves upward, the rising lifting plate will synchronously drive the inner turntable to move upward. The turntable rotates counterclockwise adaptively, so that the transmission gear synchronously drives the double gear set to rotate clockwise. The clockwise rotating double gear set will first push the valve upward, so that the valve enters the interior of the immersion separation tank vertically upward, and makes the inlet of the three-way groove and the lower end of the immersion separation tank connected. At this time, the lower end solution of the dissolved aluminum in the immersion separation tank smoothly passes through the three-way groove and the liquid inlet pipe into the pretreatment bin. At this time, the nearly saturated dissolved liquid in the immersion separation tank is discharged. As the reaction continues, the double gear set continues to rotate to close the valve. At the same time, the double gear set begins to push the outer end of the baffle, so that the baffle compresses the first spring inward, and gradually makes the through hole on the baffle correspond to the liquid outlet at the lower end of the storage bin, so that the hydrochloric acid solution in the storage bin falls into the pretreatment bin, and when the sieve plate rises, the sieve plate will drive the central shaft to rotate adaptively through the threaded action of the central shaft and drive the stirring rod to rotate synchronously, so that the hydrochloric acid and the aluminum solution entering the pretreatment bin are mixed and reacted.

[0015] The hydrochloric acid solution can react with the aluminum oxide that has been oxidized in contact with the air to generate aluminum ions. There must be air in the pretreatment bin and the soaking and separation tank. Once the dissolved solution contacts the air, the aluminum inside the dissolved solution will undergo an oxidation reaction to form aluminum oxide. The aluminum oxide will continue to react with sodium hydroxide, resulting in a gradual decrease in the dissolving capacity of the dissolved solution. Therefore, the effect of the present invention is to quickly and point-discharge the dissolved aluminum solution and subject the aluminum oxide that has been formed in the aluminum solution to a hydrochloric acid reaction treatment. On the one hand, the effect of the gradually saturated dissolved solution on the extension of the reaction cycle is avoided, and the reaction is ensured to continue without weakening. On the other hand, the dissolved aluminum solution is quickly and point-discharged and subjecting the aluminum oxide that has been formed in the aluminum solution to a hydrochloric acid reaction treatment to avoid further reaction of the aluminum oxide with sodium hydroxide to produce aluminate, thereby further causing aluminum to be consumed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall front cross-sectional structure of the present invention in the initial state; Figure 2 It is a schematic diagram of the front cross-sectional structure of the whole of the present invention after the aluminum-plastic material is placed; Figure 3 For the present invention Figure 1 A magnified schematic diagram of the main structure; Figure 4 For the present invention Figure 3 The enlarged structural diagram at A in the middle; Figure 5 It is a schematic diagram of the connection structure between the transmission gear and the inner rotating disk of the present invention; Figure 6 For the present invention Figure 5 Enlarged structural diagram at B in the middle.

[0017] In the figure: 1. Soaking and separation tank; 2. Pretreatment bin; 3. Storage bin; 31. Liquid outlet; 32. Baffle; 33. First spring; 4. Sieve plate; 41. Lifting plate; 42. Guide plate; 43. Second spring; 44. Gear block; 5. Valve; 51. Three-way groove; 52. Liquid inlet pipe; 53. Third spring; 54. Double gear set; 55. Transmission gear; 56. Inner turntable; 57. Groove; 58. Turntable; 59. Fourth spring; 6. Center axis; 61. Agitator rod. DETAILED DESCRIPTION

[0018] 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.

[0019] See also Figure 1-6 The present invention provides a technical solution: an aluminum-plastic separation and recycling device, comprising an immersion separation tank 1, a pretreatment bin 2 is fixed at the lower end of the immersion separation tank 1, and a storage bin 3 is arranged at the upper end inside the pretreatment bin 2, a sieve plate 4 is arranged above the opening of the immersion separation tank 1, and double gear sets 54 are symmetrically installed on both sides of the pretreatment bin 2, and the double gear sets 54 are composed of two large and small gears stacked and fixed, an adaptive opening component is installed between the double gear set 54 and the storage bin 3, and an adaptive connecting component is symmetrically arranged between the immersion separation tank 1 and the pretreatment bin 2, and a one-way transmission mechanism is symmetrically installed between the two sides of the sieve plate 4 and the two double gear sets 54, and a central shaft 6 with an end installed inside the pretreatment bin 2 runs through the center of the immersion separation tank 1.

[0020] The outer wall of the central axis 6 located inside the pretreatment chamber 2 is provided with stirring rods 61 at equal intervals, and the outer wall of the central axis 6 located inside the immersion separation tank 1 is provided with threads matching the screw holes at the center of the sieve plate 4, and the sieve plate 4 and the central axis 6 are threadedly connected.

[0021] The adaptive opening component includes a liquid outlet 31 and a baffle 32, and the liquid outlet 31 is symmetrically opened at the lower end of the storage bin 3, and the lower end of the liquid outlet 31 is sealed with a baffle 32 that slides through the pretreatment bin 2, and the end of the baffle 32 is fitted and connected to the rack of the large gear.

[0022] A first spring 33 is wound around the outer wall of the baffle 32 , one end of the first spring 33 is welded to the end of the baffle 32 , and the other end of the first spring 33 is fixed to the outer wall of the pre-treatment chamber 2 .

[0023] The one-way transmission mechanism includes a lifting plate 41, a guide plate 42, a tooth block 44, a transmission gear 55, an inner turntable 56, a groove 57, a turntable 58 and a fourth spring 59, and the lifting plate 41 is symmetrically fixed to the upper end of the sieve plate 4, and the lower end of the lifting plate 41 penetrates the guide plate 42 fixed to the side wall of the soaking and separation tank 1, and the inner side of the lower end of the lifting plate 41 is evenly spaced with a tooth block 44, and the pinion of the double gear set 54 is meshed with the transmission gear 55, and the transmission gear 55 is An inner turntable 56 is provided internally for matching, an inner gear is fixed on one side of the central axis of the inner turntable 56, and the inner gear is meshedly connected with the lifting plate 41 through the tooth block 44, a rotating plate 58 is hinged at an equal angle on the outer wall of the inner turntable 56, and one end of a fourth spring 59 is welded to the outer wall of the rotating plate 58, and the other end of the fourth spring 59 is fixed to the outer wall of the inner turntable 56, and grooves 57 are opened at equal angles on the inner wall of the transmission gear 55, and the end of the rotating plate 58 is pressed against the inner wall of the groove 57.

[0024] A second spring 43 is wound around the outer wall of the lifting plate 41 , and one end of the second spring 43 is welded to a fixing block on the outer wall of the lifting plate 41 , and the other end of the second spring 43 is fixed to the outer wall of the guide plate 42 .

[0025] The adaptive connecting component includes a valve 5, a three-way groove 51 and a liquid inlet pipe 52, and a through hole is symmetrically opened at the lower end of the immersion and separation tank 1, and the inside of the through hole is sealed with a valve 5, a three-way groove 51 is opened inside the valve 5, and the upper end opening of the three-way groove 51 is located inside the through hole, the upper end of the liquid inlet pipe 52 is slidably inserted into the inside of the lower end opening of the three-way groove 51, and the lower end of the liquid inlet pipe 52 is connected with the pretreatment chamber 2, and the outer end of the valve 5 is fit-connected with the rack of the large gear.

[0026] A third spring 53 is provided between the valve 5 and the pre-treatment chamber 2 , and the upper and lower ends of the third spring 53 are fixed to the upper surface of the pre-treatment chamber 2 and the lower surface of the valve 5 , respectively.

[0027] Working principle: When using the aluminum-plastic separation and recycling equipment, Figure 1 As shown, a large amount of cleaned and broken aluminum-plastic materials are placed in the sieve plate 4. When the mass of the aluminum-plastic materials in the sieve plate 4 reaches a certain level, the sieve plate 4 begins to fall and gradually sinks below the liquid surface in the immersion separation tank 1. At the same time, when the sieve plate 4 falls, it will synchronously drive the lifting plates 41 on both sides to fall and rotate and compress the second spring 43, and synchronously drive the internal gear and the inner turntable 56 to adaptively rotate clockwise through the meshing action with the internal gear (the direction perspective of the right structure is used as an example for explanation in this article), as shown in FIG. Figure 5 and Figure 6 As shown, when the inner turntable 56 rotates clockwise, the transmission gear 55 will not rotate, so the sieve plate 4 will smoothly rotate. Figure 2 As shown, it falls into the bottom of the soaking and separation tank 1.

[0028] As the name implies, filter holes are evenly arranged on the outer wall of the sieve plate 4, which allow the solution to pass smoothly. As the reaction proceeds, the alkaline solution gradually dissolves and separates the aluminum in the aluminum-plastic material, and the separated aluminum is mixed in the alkaline solution. Therefore, the weight of the aluminum-plastic material on the sieve plate 4 gradually decreases. When the weight reduction on the sieve plate 4 is not enough to overcome the resistance of the second springs 43 on both sides and their matching parts, the sieve plate 4 begins to move vertically upward along the inner wall of the immersion separation tank 1 to reset. When the sieve plate 4 moves upward, the overall linkage begins.

[0029] When the sieve plate 4 moves upward, the rising lifting plate 41 will synchronously drive the inner turntable 56 to rotate counterclockwise in an adaptive manner. When the inner turntable 56 rotates counterclockwise, the inner turntable 56 will synchronously drive the transmission gear 55 to rotate counterclockwise in an adaptive manner through the cooperation of the rotating plate 58 and the groove 57. When the transmission gear 55 rotates counterclockwise, the transmission gear 55 will synchronously drive the double gear set 54 to rotate clockwise. The clockwise rotating double gear set 54 will first push the valve 5 upward, so that the valve 5 vertically enters the interior of the immersion separation tank 1, and makes the inlet of the three-way groove 51 pass through the lower end of the immersion separation tank 1. At this time, the lower end solution of the dissolved aluminum in the immersion separation tank 1 smoothly passes through the three-way groove 51 and the liquid inlet pipe 52 into the pretreatment chamber 2. At this time, the nearly saturated dissolved liquid in the immersion separation tank 1 is discharged. As the reaction continues, the double gear set 54 continues to rotate to close the valve 5. At the same time, the double gear set 54 begins to push the baffle 3 2, so that the baffle plate 32 compresses the first spring 33 inward, and gradually makes the through hole on the baffle plate 32 correspond to the liquid outlet 31 at the lower end of the storage bin 3, so that the hydrochloric acid solution inside the storage bin 3 falls into the pretreatment bin 2, and when the sieve plate 4 rises, the sieve plate 4 will drive the central shaft 6 to rotate adaptively through the threaded action of the central shaft 6 and drive the stirring rod 61 to rotate synchronously, so that the hydrochloric acid and the aluminum solution entering the pretreatment bin 2 are mixed and reacted, and the hydrochloric acid solution can react with the aluminum oxide that has been oxidized in contact with the air to generate aluminum ions. There will inevitably be air in the pretreatment bin 2 and the immersion separation tank 1, and once the dissolved solution contacts the air, the aluminum inside the dissolved solution will undergo an oxidation reaction to form aluminum oxide, and the aluminum oxide will continue to react with sodium hydroxide, resulting in a step-by-step decrease in the dissolving ability of the dissolved solution. Therefore, one of the effects of the present invention is to quickly and point-discharge the dissolved aluminum solution and perform hydrochloric acid reaction treatment on the aluminum oxide that has been formed in the aluminum solution.

[0030] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An aluminum-plastic separation and recovery device, comprising an immersion separation tank (1), characterized in that: A pretreatment bin (2) is fixed at the lower end of the soaking and separation tank (1), and a storage bin (3) is arranged at the upper end of the pretreatment bin (2). A sieve plate (4) is arranged above the opening of the soaking and separation tank (1), and double gear sets (54) are symmetrically installed on both sides of the pretreatment bin (2), and the double gear sets (54) are composed of two large and small gears stacked and fixed, an adaptive opening component is installed between the double gear sets (54) and the storage bin (3), and adaptive connecting components are symmetrically arranged between the soaking and separation tank (1) and the pretreatment bin (2), and one-way transmission mechanisms are symmetrically installed between the two sides of the sieve plate (4) and the two double gear sets (54), and a central shaft (6) with an end portion installed inside the pretreatment bin (2) passes through the center of the soaking and separation tank (1).

2. The aluminum-plastic separation and recovery equipment according to claim 1, characterized in that: The outer wall of the central axis (6) located inside the pretreatment chamber (2) is provided with stirring rods (61) at equal intervals, and the outer wall of the central axis (6) located inside the soaking and separation tank (1) is provided with threads matching the screw holes at the center of the sieve plate (4), and the sieve plate (4) and the central axis (6) are threadedly connected.

3. The aluminum-plastic separation and recovery equipment according to claim 1, characterized in that: The adaptive opening component comprises a liquid outlet (31) and a baffle (32), and the lower end of the storage bin (3) is symmetrically provided with the liquid outlet (31), the lower end of the liquid outlet (31) is sealed and affixed with a baffle (32) that slides through the pretreatment bin (2), and the end of the baffle (32) is affixed and connected to the rack of the large gear.

4. The aluminum-plastic separation and recovery equipment according to claim 3, characterized in that: A first spring (33) is wound around the outer wall of the baffle (32), one end of the first spring (33) is welded to the end of the baffle (32), and the other end of the first spring (33) is fixed to the outer wall of the pretreatment chamber (2).

5. The aluminum-plastic separation and recovery equipment according to claim 1, characterized in that: The one-way transmission mechanism comprises a lifting plate (41), a guide plate (42), a tooth block (44), a transmission gear (55), an inner rotating disk (56), a groove (57), a rotating plate (58) and a fourth spring (59), and the lifting plate (41) is symmetrically fixed to the upper end of the sieve plate (4), the lower end of the lifting plate (41) is penetrated by a guide plate (42) fixed to the side wall of the soaking and separation tank (1), and tooth blocks (44) are arranged at equal intervals on the inner side of the lower end of the lifting plate (41), the pinion of the double gear set (54) is meshedly connected with the transmission gear (55), and the transmission gear ( An inner rotating disk (56) is matchedly arranged inside the inner rotating disk (55), an inner gear is fixed on one side of the central axis of the inner rotating disk (56), and the inner gear is meshingly connected to the lifting plate (41) through a tooth block (44), a rotating plate (58) is hingedly connected at an equal angle to the outer wall of the inner rotating disk (56), and one end of a fourth spring (59) is welded to the outer wall of the rotating plate (58), and the other end of the fourth spring (59) is fixed to the outer wall of the inner rotating disk (56), and a groove (57) is opened at an equal angle on the inner wall of the transmission gear (55), and the end of the rotating plate (58) is pressed against the inner wall of the groove (57).

6. The aluminum-plastic separation and recovery equipment according to claim 5, characterized in that: A second spring (43) is wound around the outer wall of the lifting plate (41), one end of the second spring (43) is welded to a fixing block on the outer wall of the lifting plate (41), and the other end of the second spring (43) is fixed to the outer wall of the guide plate (42).

7. The aluminum-plastic separation and recovery equipment according to claim 1, characterized in that: The adaptive connection component comprises a valve (5), a three-way groove (51) and a liquid inlet pipe (52), and the lower end of the soaking and separation tank (1) is symmetrically provided with through holes, and the inside of the through holes is blocked with a valve (5), the inside of the valve (5) is provided with a three-way groove (51), and the upper end opening of the three-way groove (51) is located inside the through hole, the upper end of the liquid inlet pipe (52) is slidably inserted inside the lower end opening of the three-way groove (51), and the lower end of the liquid inlet pipe (52) is connected to the pretreatment chamber (2), and the outer end of the valve (5) is fitted and connected to the rack of the large gear.

8. The aluminum-plastic separation and recovery equipment according to claim 7, characterized in that: A third spring (53) is provided between the valve (5) and the pretreatment chamber (2), and the upper and lower ends of the third spring (53) are respectively fixed to the upper surface of the pretreatment chamber (2) and the lower surface of the valve (5).

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