CN118218379A

CN118218379A - Heavy metal pollutant separation device for fly ash of household garbage incinerator slag

Info

Publication number: CN118218379A
Application number: CN202211669792.2A
Authority: CN
Inventors: 朱怿
Original assignee: Changshu Pufa Second Thermoelectric Energy Co ltd
Current assignee: Changshu Pufa Second Thermoelectric Energy Co ltd
Priority date: 2022-12-25
Filing date: 2022-12-25
Publication date: 2024-06-21

Abstract

The invention provides a heavy metal pollutant separation device for fly ash of household garbage incinerator slag, and relates to the technical field of pollutant separation. The heavy metal pollutant separation device based on the fly ash of the household garbage incinerator slag comprises a shell, wherein a stirring frame is fixedly connected to the periphery of the bottom end of an output end of a servo motor, a bevel gear III is fixedly connected to the periphery of the upper part of the output end of the servo motor, a bevel gear II is meshed with the rear part of the bevel gear III, a bevel gear I is meshed with the lower end of the front part of the bevel gear II, and a plurality of L-shaped stirring rods which are uniformly distributed are fixedly connected to the bottom wall of the bevel gear I. The first servo motor drives the stirring frame and the bevel gear to rotate, the L-shaped stirring rod and the stirring frame are rotated reversely by meshing, so that the medicament solution is stirred under the action of force in the opposite direction, and the filtered heavy metal chelating agent is conveyed to the solvent tank through the pump body, so that the heavy metal chelating agent is ready for spraying again, and the heavy metal chelating agent can be fully utilized.

Description

Heavy metal pollutant separation device for fly ash of household garbage incinerator slag

Technical Field

The invention relates to the technical field of pollutant separation, in particular to a heavy metal pollutant separation device for fly ash of household garbage incinerator slag.

Background

The household garbage is various wastes produced by people in daily life, particularly the daily household garbage produced along with the improvement of the living standard of people is continuously increased, and a large amount of garbage is increased to occupy a large amount of land, so that the garbage needs to be treated in time, and the treatment method mainly comprises an incineration method, a landfill method and a recycling method, wherein the incineration method is the most common treatment method, but a large amount of fly ash is produced during incineration, and the fly ash often contains heavy metals with higher concentration, so that the environment is greatly harmed under the action of rain leaching.

In order to prevent fly ash from carrying a large amount of heavy metals to fly away, the fly ash needs to be collected and treated, and heavy metals in the fly ash are usually precipitated by adding chemical agents into a reaction tank and continuously stirring, but the stirring is usually unidirectional, so that the agents and the precipitates are easy to gather at one place, the overall reaction efficiency is affected, the agents are discharged after being used, and part of the agents may not be fully utilized, so that a certain resource waste is caused.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a heavy metal pollutant separation device for fly ash of household garbage incineration slag, which solves the problems that the heavy metal chelating agent is not recycled and accumulated at one place due to insufficient stirring, the utilization efficiency is low, and a certain resource is wasted.

In order to achieve the above purpose, the invention is realized by the following technical scheme: the utility model provides a heavy metal pollutant separator of domestic waste incineration slag flying ash, includes the casing, casing antetheca lower part is provided with logical groove, casing antetheca fixedly connected with collects the storehouse, the casing has through groove intercommunication to collect the storehouse, wall upper portion all fixed connection is around the fixed plate in the casing, wall middle part all sliding connection is around link one around in the casing, link one roof fixedly connected with servo motor one, servo motor one output runs through link one in proper order, connecting cylinder and helical gear one, servo motor one output bottom periphery fixedly connected with stirring frame, servo motor one output upper portion periphery fixedly connected with helical gear three, helical gear three rear portion meshing has helical gear two, helical gear two rear wall rotation is connected with bracing piece two, bracing piece two top fixedly connected with is at a link diapire rear portion, helical gear two front lower extreme meshing has one, a roof rotation is connected with the connecting cylinder, a connecting cylinder both sides lateral wall evenly connected with bracing piece one, helical gear one is connected with one in the equal fixedly connected with bracing piece of helical gear top, one helical gear one is connected with one in the same L shape of bottom wall fixedly connected with stirring rod of a plurality of L.

Preferably, the upper parts of the side walls of the two sides of the shell are fixedly connected with air inlet pipes, the middle parts of the inner walls of the air inlet pipes are fixedly connected with cross plates, the opposite sides of the cross plates are fixedly connected with servo motors II, and the output ends of the servo motors II penetrate through the cross plates and are fixedly connected with a plurality of fan blades which are uniformly distributed.

Preferably, the middle part fixedly connected with solvent case of casing roof, the solvent case has the confession liquid storehouse through the pipeline intercommunication, the equal fixed connection of confession liquid storehouse both sides lateral wall top in the casing, a plurality of shower nozzles of confession liquid storehouse diapire fixedly connected with evenly distributed.

Preferably, the hydraulic rod is fixedly connected to the middle part of the bottom wall of the fixed plate, the output end of the hydraulic rod is fixedly connected to the middle part of a top wall of the connecting frame, springs are fixedly connected to the front and rear parts of the top wall of the connecting frame, and the top ends of the springs are fixedly connected to the front and rear parts of the bottom wall of the fixed plate.

Preferably, the back wall lower part fixedly connected with backup pad in the casing, backup pad bottom fixedly connected with electric putter, electric putter output fixedly connected with link two, two bottom four corners of link are all fixedly connected with in filter top four corners, filter sliding connection is in shells inner wall lower part.

Preferably, the stepper motor is fixedly connected to the lower parts of the two sides of the rear wall of the shell, the output end of the stepper motor penetrates through the rear wall of the shell and is fixedly connected with a threaded rod, the front end and the rear end of the threaded rod are rotatably connected to the lower parts of the two sides of the front wall and the rear wall in the shell, the threaded rod is externally Zhou Jun in threaded connection with a sliding block, the bottom end of the sliding block is fixedly connected to the two sides of the top wall of the scraping plate, and the scraping plate is opposite to the through groove.

Preferably, a hose is fixedly connected to the bottom of the side wall of one side in the shell, the top end of the hose is communicated with a pump body, the bottom wall of the pump body is fixedly connected to the rear part of the top wall of the shell, and the pump body is communicated with the solvent tank.

Preferably, the bottom of the rear wall of the shell is provided with a through hole, the rear wall of the shell is fixedly connected with an air outlet pipe, the air outlet pipe is communicated with the inner cavity of the shell through the through hole, the air outlet pipe is J-shaped, the upper part of the inner wall of the air outlet pipe is slidably connected with an adsorption bin, activated carbon is arranged in the adsorption bin, and the rear part of the adsorption bin penetrates through the rear wall of the air outlet pipe.

Working principle: the second servo motor drives the fan blade to rotate, so that fly ash enters the shell along with air through the air inlet pipe, the baffle at the air inlet pipe is utilized to prevent the entry of larger sundries, after the fly ash enters the shell, the heavy metal chelating agent in the solvent tank is sent into the liquid supply bin by the pipeline and sprayed out by the spray head, so that the fly ash falls into heavy metal chelating agent liquid gathered at the lower part of the shell, the first servo motor drives the stirring frame to rotate and simultaneously drives the third bevel gear to rotate, the third bevel gear and the second bevel gear are meshed, the second bevel gear and the first bevel gear are utilized to transfer rotation to the first bevel gear, and the third bevel gear and the first bevel gear are reversely rotated, so that the L-shaped stirring rod connected with the first bevel gear and the stirring frame are reversely rotated, the purpose of fully stirring is achieved, and the integral reaction efficiency is prevented from being influenced due to the fact that the medicament and the precipitate are gathered at one place by unidirectional rotation, when the reaction is carried out for a certain time, the heavy metal chelating agent and heavy metal ions in the fly ash carry out chemical reaction to generate a large amount of insoluble flocculent precipitate, the first connecting frame is driven to move upwards by the hydraulic rod, the L-shaped stirring rod and the stirring frame are further moved upwards, the tension applied to the hydraulic rod is relieved by the spring, the second connecting frame is driven to move upwards by the electric push rod, the filter plate is separated from solvent by the upward movement, the movement is stopped when the filter plate moves to the bottom wall of the scraper plate, the threaded rod is driven to rotate by the stepping motor, the sliding block is driven to move along the surface of the filter plate, the insoluble flocculent precipitate is pushed into the collecting bin by the through groove to be collected, the pump body conveys the filtered chemical agent into the solvent tank by the hose, and the chemical agent can be continuously sprayed out by the spray head for reuse, therefore, waste caused by insufficient use of the medicament is avoided, and air entering the shell can only enter the medicament and then enter the air outlet pipe through the through hole because the height of the medicament is higher than that of the through hole, so that most fly ash in the air can be remained in the medicament, and the active carbon in the adsorption bin at the upper part of the air outlet pipe is utilized to adsorb the residual fly ash and peculiar smell containing heavy metal in the air, so that the exhaust gas is ensured to be clean and harmless.

The invention provides a heavy metal pollutant separation device for fly ash of household garbage incinerator slag. The beneficial effects are as follows:

1. According to the invention, the stirring frame and the helical gear III are driven to rotate by the servo motor I, and the helical gear III is meshed with the helical gear II and the helical gear II is meshed with the helical gear I, so that the helical gear I can rotate along with the helical gear III, and the helical gear I and the helical gear III are reversely rotated under the action of the helical gear II, so that the L-shaped stirring rod connected with the helical gear I is reversely rotated with the stirring frame, and further the reagent solution is stirred under the action of reverse force, so that the chemical reagent can be fully contacted with heavy metals in fly ash, and the influence on the integral reaction efficiency caused by the aggregation of the reagent and the precipitate at one place under unidirectional rotation is avoided.

2. According to the invention, the electric push rod drives the second connecting frame to move upwards so as to enable the filter plate to move upwards to separate insoluble flocculent precipitate from the medicament, and the stepping motor drives the threaded rod to drive the sliding block to move so as to push the scraping plate to push the insoluble flocculent precipitate to the collecting bin, and meanwhile, the heavy metal chelating agent is conveyed to the solvent tank again by the hose by the pump body, so that preparation is made for spraying again, the heavy metal chelating agent can be fully utilized, and the situation that part of the non-acting heavy metal chelating agent is wasted due to abandonment after one-time use is avoided.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a side perspective view of the present invention;

FIG. 3 is a schematic perspective view in front elevation and cross-section of the present invention;

FIG. 4 is a schematic side cross-sectional perspective view of the present invention;

FIG. 5 is a schematic view of the internal connection structure of the air inlet pipe according to the present invention;

Fig. 6 is a schematic diagram of a helical gear two-connection structure according to the present invention.

Wherein, 1, a collection bin; 2. a housing; 3. a solvent tank; 4. an air inlet pipe; 5. a hose; 6. a pump body; 7. a stepping motor; 8. an adsorption bin; 9. an air outlet pipe; 10. a filter plate; 11. an L-shaped stirring rod; 12. a threaded rod; 13. a slide block; 14. a servo motor I; 15. a spring; 16. a fixing plate; 17. a liquid supply bin; 18. a spray head; 19. a hydraulic rod; 20. a first connecting frame; 21. a first support rod; 22. a stirring rack; 23. a first helical gear; 24. a connecting cylinder; 25. a helical gear III; 26. a second support rod; 27. a support plate; 28. a helical gear II; 29. an electric push rod; 30. a scraper; 31. a second connecting frame; 32. a fan blade; 33. a cross plate; 34. a servo motor II; 35. a through groove; 36. and (5) a through hole.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Examples:

As shown in fig. 1-6, the embodiment of the invention provides a heavy metal pollutant separating device for fly ash of household garbage incinerator slag, which comprises a shell 2, wherein the lower part of the front wall of the shell 2 is provided with a through groove 35, the front wall of the shell 2 is fixedly connected with a collecting bin 1, the shell 2 is communicated with the collecting bin 1 through the through groove 35, so that flocculent precipitate is conveniently sent into the collecting bin 1 by the shell 2 to be collected, the upper parts of the front wall and the rear wall in the shell 2 are fixedly connected with the front end and the rear end of a fixed plate 16, the middle parts of the front wall and the rear wall in the shell 2 are both slidingly connected with the front wall and the rear wall of a connecting frame 20, the aim of supporting and fixing related structures is fulfilled through the fixed plate 16 and the connecting frame 20, the inner top wall of the connecting frame 20 is fixedly connected with a servo motor 14, the output end of the servo motor 14 sequentially penetrates through the connecting frame 20, a connecting cylinder 24 and a bevel gear 23, the periphery of the bottom end of the output end of the first servo motor 14 is fixedly connected with a stirring frame 22, the periphery of the upper part of the output end of the first servo motor 14 is fixedly connected with a third bevel gear 25, the rear part of the third bevel gear 25 is meshed with a second bevel gear 28, the rear wall of the second bevel gear 28 is rotationally connected with a second support rod 26, the top end of the second support rod 26 is fixedly connected with the rear part of the bottom wall of the first connecting frame 20, the purpose of supporting the second bevel gear 28 is realized through the second support rod 26, the second bevel gear 28 is always meshed with the third bevel gear 25, the lower end of the front part of the second bevel gear 28 is meshed with a first bevel gear 23, the top wall of the first bevel gear 23 is rotationally connected with a connecting cylinder 24, the side walls of the two sides of the connecting cylinder 24 are fixedly connected with a first support rod 21, the top ends of the first support rod 21 are fixedly connected with the two sides of the bottom wall of the first connecting frame 20, the purpose of isolating the first bevel gear 23 from the output end of the first servo motor 14 is realized through the connecting cylinder 24, and reach the effect of supporting helical gear one 23 through connecting cylinder 24 and bracing piece one 21, helical gear one 23 diapire fixedly connected with evenly distributed's a plurality of L shape puddler 11, drive stirring frame 22 and helical gear three 25 rotatory through servo motor one 14, utilize intermeshing between helical gear three 25, helical gear two 28 and the helical gear one 23, make helical gear one 23 obtain the opposite direction of rotation with helical gear three 25, thereby make L shape puddler 11 and stirring frame 22 reverse direction, and then make the medicament solution receive opposite direction effect, make the chemical agent can fully contact with the heavy metal in the flying ash, avoid making medicament and precipitate gather in one place and influence whole reaction efficiency under unidirectional rotation.

The upper parts of the side walls of the two sides of the shell 2 are fixedly connected with an air inlet pipe 4, the middle part of the inner wall of the air inlet pipe 4 is fixedly connected with a cross plate 33, the opposite sides of the cross plate 33 are fixedly connected with a second servo motor 34, the output end of the second servo motor 34 penetrates through the cross plate 33 and is fixedly connected with a plurality of fan blades 32 which are uniformly distributed, the baffle plate at the position of the air inlet pipe 4 is used for preventing large sundries from entering the shell 2, and the second servo motor 34 is supported by the cross plate 33, so that the second servo motor 34 can drive the fan blades 32 to rotate, and fly ash enters the shell 2 along with air.

The middle part fixedly connected with solvent case 3 of casing 2 roof, solvent case 3 has confession liquid storehouse 17 through the pipeline intercommunication, the equal fixed connection of confession liquid storehouse 17 both sides lateral wall top in casing 2, a plurality of shower nozzles 18 of confession liquid storehouse 17 diapire fixedly connected with evenly distributed, realize the purpose of storing heavy metal chelating agent through solvent case 3, and then carry heavy metal chelating agent to confession liquid storehouse 17 through the pipeline and utilize shower nozzle 18 to spray it into vaporific blowout, thereby reach the purpose that makes it fully contact with the flying dust, and do benefit to the separation of flying dust from the air.

The fixed plate 16 diapire middle part fixedly connected with hydraulic stem 19, hydraulic stem 19 output fixed connection is in link one 20 roof middle part, the equal fixedly connected with spring 15 of link one 20 roof front and back portion, the equal fixedly connected with in spring 15 top is in the front and back portion of fixed plate 16 diapire, realize driving link one 20 purpose of reciprocating through hydraulic stem 19, thereby do not hinder the insoluble floccule that follow-up filter 10 obtained heavy metal chelating agent and heavy metal reaction and medicament separation, and receive partial pulling force through spring 15 dispersion hydraulic stem 19, reach the purpose of protection hydraulic stem 19.

The lower part of the inner rear wall of the shell 2 is fixedly connected with a supporting plate 27, the bottom end of the supporting plate 27 is fixedly connected with an electric push rod 29, the output end of the electric push rod 29 is fixedly connected with a second connecting frame 31, four corners of the bottom end of the second connecting frame 31 are fixedly connected with four corners of the top end of the filter plate 10, the filter plate 10 is slidably connected to the lower part of the inner wall of the shell 2, the purpose of supporting the electric push rod 29 is achieved through the supporting plate 27, and therefore the electric push rod 29 is guaranteed to stably drive the second connecting frame 31 to move, and the filter plate 10 can move along the inner wall of the shell 2.

The lower parts of the two sides of the rear wall of the shell 2 are fixedly connected with a stepping motor 7, the output end of the stepping motor 7 penetrates through the rear wall of the shell 2 and is fixedly connected with a threaded rod 12, the front end and the rear end of the threaded rod 12 are rotationally connected to the lower parts of the two sides of the front wall and the rear wall in the shell 2, a slide block 13 is connected to the outer Zhou Jun threads of the threaded rod 12, the bottom end of the slide block 13 is fixedly connected to the two sides of the top wall of the scraper 30, the scraper 30 faces the through groove 35, the threaded rod 12 is rotated through the stepping motor 7, and accordingly the slide block 13 drives the scraper 30 to move, and the two sides of the top wall of the scraper 30 are connected with the slide block 13, so that the slide block 13 can be prevented from rotating along with the threaded rod 12.

One side lateral wall bottom fixedly connected with hose 5 in the casing 2, hose 5 top intercommunication has pump body 6, and pump body 6 diapire fixed connection is at casing 2 roof rear portion, and pump body 6 and solvent case 3 intercommunication realize carrying the purpose of solvent case 3 by hose 5 with the chemical agent after filtering through pump body 6 to make the chemical agent can be utilized completely, avoid appearing extravagant.

The bottom of the rear wall of the shell 2 is provided with a through hole 36, the rear wall of the shell 2 is fixedly connected with an air outlet pipe 9, the air outlet pipe 9 is communicated with the inner cavity of the shell 2 through the through hole 36, the air outlet pipe 9 is J-shaped, the upper part of the inner wall of the air outlet pipe 9 is slidably connected with an adsorption bin 8, activated carbon is arranged in the adsorption bin 8, the rear part of the adsorption bin 8 penetrates through the rear wall of the air outlet pipe 9, the air entering the shell 2 is enabled to enter the chemical agent by utilizing the chemical agent to be higher than the through hole 36, and then the air entering the air outlet pipe 9 through the through hole 36, so that fly ash containing heavy metal in the air is left in the chemical agent, and the activated carbon in the adsorption bin 8 is utilized to further adsorb peculiar smell in the air, so that the discharged air is ensured to be clean and harmless.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. Heavy metal pollutant separation device of domestic waste incineration slag flying ash, including casing (2), its characterized in that: the utility model discloses a novel multifunctional electric motor, which is characterized in that a through groove (35) is arranged at the lower part of the front wall of the shell (2), the front wall of the shell (2) is fixedly connected with a collecting bin (1), the shell (2) is communicated with the collecting bin (1) through the through groove (35), the upper parts of the front wall and the rear wall of the shell (2) are fixedly connected with the front end and the rear end of a fixed plate (16), the middle parts of the front wall and the rear wall of the shell (2) are slidably connected with the front wall and the rear wall of a connecting frame I (20), a servo motor I (14) is fixedly connected with the inner top wall of the connecting frame I (20), the output end of the servo motor I (14) sequentially penetrates through the connecting frame I (20), a connecting cylinder (24) and a bevel gear I (23), the outer periphery of the bottom end of the output end of the first servo motor (14) is fixedly connected with a stirring frame (22), the outer periphery of the upper part of the output end of the first servo motor (14) is fixedly connected with a third bevel gear (25), the rear part of the third bevel gear (25) is meshed with a second bevel gear (28), the rear wall of the second bevel gear (28) is rotationally connected with a second support rod (26), the top end of the second support rod (26) is fixedly connected with the rear part of the bottom wall of the first connecting frame (20), the lower end of the front part of the second bevel gear (28) is meshed with a first bevel gear (23), the top wall of the first bevel gear (23) is rotationally connected with a connecting cylinder (24), the side walls on two sides of the connecting cylinder (24) are fixedly connected with a first support rod (21), the top end of the first supporting rod (21) is fixedly connected to two sides of the bottom wall of the first connecting frame (20), and a plurality of L-shaped stirring rods (11) which are uniformly distributed are fixedly connected to the bottom wall of the first bevel gear (23).

2. The heavy metal contaminant separation device for the fly ash of the household garbage incinerator slag according to claim 1, wherein: the utility model discloses a motor fan, including casing (2), cross board (33), servo motor (34) two, servo motor (34) output all runs through cross board (33) and fixedly connected with evenly distributed's a plurality of flabellum (32), all fixedly connected with air-supply line (4) in casing (2) both sides lateral wall upper portion, all fixedly connected with cross board (33) in air-supply line (4) inner wall middle part, cross board (33) opposite side all fixedly connected with servo motor two (34).

3. The heavy metal contaminant separation device for the fly ash of the household garbage incinerator slag according to claim 1, wherein: the novel spray head is characterized in that the middle of the top wall of the shell (2) is fixedly connected with a solvent tank (3), the solvent tank (3) is communicated with a liquid supply bin (17) through a pipeline, side walls on two sides of the liquid supply bin (17) are fixedly connected to the top ends of side walls on two sides in the shell (2), and the bottom wall of the liquid supply bin (17) is fixedly connected with a plurality of spray heads (18) which are uniformly distributed.

4. The heavy metal contaminant separation device for the fly ash of the household garbage incinerator slag according to claim 1, wherein: the hydraulic rod (19) is fixedly connected to the middle of the bottom wall of the fixed plate (16), the output end of the hydraulic rod (19) is fixedly connected to the middle of the top wall of the first connecting frame (20), springs (15) are fixedly connected to the front and rear parts of the top wall of the first connecting frame (20), and the tops of the springs (15) are fixedly connected to the front and rear parts of the bottom wall of the fixed plate (16).

5. The heavy metal contaminant separation device for the fly ash of the household garbage incinerator slag according to claim 1, wherein: the utility model discloses a filter, including casing (2), back wall lower part fixedly connected with backup pad (27) in casing (2), backup pad (27) bottom fixedly connected with electric putter (29), electric putter (29) output fixedly connected with link two (31), equal fixed connection in filter (10) top four corners in link two (31) bottom four corners, filter (10) sliding connection is in casing (2) inner wall lower part.

6. The heavy metal contaminant separation device for the fly ash of the household garbage incinerator slag according to claim 1, wherein: the utility model discloses a motor, including casing (2), casing (2) back wall both sides lower part all fixedly connected with step motor (7), step motor (7) output all runs through casing (2) back wall and fixedly connected with threaded rod (12), the front and back end of threaded rod (12) all rotates to be connected in casing (2) back wall both sides lower part, threaded rod (12) outer Zhou Jun threaded connection has slider (13), slider (13) bottom all fixed connection is in scraper blade (30) roof both sides, scraper blade (30) are just to logical groove (35).

7. The heavy metal contaminant separation device for the fly ash of the household garbage incinerator slag according to claim 1, wherein: the novel solvent tank is characterized in that a hose (5) is fixedly connected to the bottom of one side wall in the shell (2), a pump body (6) is communicated with the top end of the hose (5), the bottom wall of the pump body (6) is fixedly connected to the rear portion of the top wall of the shell (2), and the pump body (6) is communicated with the solvent tank (3).

8. The heavy metal contaminant separation device for the fly ash of the household garbage incinerator slag according to claim 1, wherein: the utility model discloses a novel air conditioner, including casing (2) back wall bottom, casing (2) back wall bottom is provided with opening (36), casing (2) back wall fixedly connected with goes out tuber pipe (9), go out tuber pipe (9) through opening (36) and casing (2) inner chamber intercommunication, go out tuber pipe (9) for J shape, go out tuber pipe (9) inner wall upper portion sliding connection has adsorption bin (8), adsorption bin (8) inside is provided with the active carbon, adsorption bin (8) rear portion runs through play tuber pipe (9) back wall.