Novel energy-saving environment-friendly intelligent kiln

Abstract

The novel energy-saving and environment-friendly intelligent kiln comprises a kiln body and a machining material arranged on one side of the input end of the kiln body, a preheating structure is arranged at the top of the kiln body and comprises an annular pipe communicating with the top of the kiln body, and a fan communicating with the annular pipe is fixedly connected to the top of the kiln body; the draught fan can extract smoke in the furnace body through the annular pipe, the output end of the draught fan communicates with a hose, the end, away from the draught fan, of the hose communicates with a connecting plate, the bottom of the connecting plate is fixedly connected with an air bag, and the bottom of the air bag makes contact with the top of a machining material. By means of the preheating structure at the top of the furnace body, the draught fan and the annular pipe are used for extracting flue gas in the furnace body, the hot flue gas is guided into the air bag at the bottom of the connecting plate through the hose, preheating of machined materials is achieved, the energy utilization efficiency is improved, the requirement for a new heat source is reduced, and therefore the energy-saving effect is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of kilns, and in particular to a novel energy-saving and environment-friendly intelligent kiln. Background Art

[0002] A kiln is a furnace used to fire ceramics, sculptures, or fuse enamel to the surface of metal objects. It is generally made of bricks and stones, and can be made into various sizes as needed. It is operated by combustible gas, oil or electricity. Its structure includes four parts: kiln chamber, combustion equipment, ventilation equipment and conveying equipment. Different types of kilns may differ in these components, but the basic structure is similar.

[0003] For example, the patent application number published on the China Patent Network is: 202322668808.4, and the patent name is: Kiln air preheating device, including a furnace body, a first collecting chamber is provided on the outside of the furnace body, and a preheating component is installed on one side of the first collecting chamber; a smoke exhaust pipe is inserted on the top of the furnace body, a filter cavity is inserted at one end of the smoke exhaust pipe, a filter core is slidably connected to the inside of the filter cavity, and a smoke guide pipe is inserted on the top of the filter cavity; the first collecting chamber includes a sealed door, and a connecting pipe is fixedly connected to the side of the first collecting chamber. The improved preheating device recovers the hot air around the furnace body through the first collecting chamber, recovers and filters the exhausted hot smoke through the smoke guide pipe and the filter cavity, thereby improving the heat recovery efficiency around the furnace body, storing the hot air around the preheating chamber through the second collecting chamber, and inputting the hot air into the preheating chamber through the connecting pipe and the reflux pipe, thereby realizing the recovery and utilization of heat around the preheating component.

[0004] However, existing kilns can only use flue gas to pre-heat the incoming airflow. When materials need to be placed into the kiln, heat exchange will occur with the high-temperature environment in the kiln. The materials will absorb the heat in the kiln, causing the temperature in the kiln to drop locally or as a whole. At the same time, a temperature gradient will be formed on its surface and inside. This temperature gradient will cause heat to be transferred from the high-temperature area in the kiln to the inside of the material until thermal equilibrium is reached. During this process, the temperature distribution inside the furnace will change.

[0005] Therefore, it is necessary to design and transform new energy-saving and environmentally friendly intelligent kilns. Summary of the invention

[0006] In order to solve the problems raised in the above background technology, the purpose of the present invention is to provide a new type of energy-saving and environmentally friendly intelligent kiln, which has the advantage of synchronous preheating of materials, and solves the problem that the existing kiln can only use flue gas to preheat the incoming airflow. When the material needs to be put into the kiln, heat exchange will occur with the high temperature environment in the furnace. The material will absorb the heat in the furnace, causing the temperature in the furnace to drop locally or as a whole. At the same time, a temperature gradient will be formed on its surface and inside. This temperature gradient will prompt heat to be transferred from the high temperature area in the furnace to the inside of the material until thermal equilibrium is reached. In this process, the temperature distribution inside the furnace body will change.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a new energy-saving and environment-friendly intelligent kiln, comprising a furnace body;

[0008] Processing material arranged on one side of the furnace input end;

[0009] A preheating structure is provided on the top of the furnace body, and the preheating structure includes an annular tube connected to the top of the furnace body. A fan connected to the annular tube is fixedly connected to the top of the furnace body, and the fan can use the annular tube to extract the smoke inside the furnace body. The output end of the fan is connected to a hose, and the end of the hose away from the fan is connected to a connecting plate. The bottom of the connecting plate is fixedly connected to an air bag, and the bottom of the air bag is in contact with the top of the processing material. A supporting structure is provided on the surface of the furnace body, and the supporting structure can push the connecting plate to rise and fall to adjust the spacing.

[0010] As a preferred embodiment of the present invention, the supporting structure includes a bracket fixedly connected to the two ends of the right side of the furnace body, the inner side of the bracket is movably connected with a shaft rod through a bearing, the surface of the shaft rod is fixedly connected with a push rod, the processing material can squeeze the push rod to swing during horizontal transportation, the side of the push rod away from the shaft rod is in contact with the surface of the processing material, the end of the shaft rod away from the push rod is fixedly connected with a sleeve plate, the side of the sleeve plate away from the shaft rod extends to the outside of the connecting plate, the outside of the connecting plate is fixedly connected with a sliding rod, the side of the sliding rod away from the connecting plate extends to the inside of the sleeve plate and is slidably connected to the sleeve plate.

[0011] As a preferred embodiment of the present invention, one end of the push rod away from the shaft rod is movably connected to a support roller via a pin, and an outer surface of the support roller is in contact with the surface of the processing material.

[0012] As a preferred embodiment of the present invention, a guide rail is fixedly connected to one side of the furnace body close to the supporting structure, a baffle is slidably connected to the inner side of the guide rail, and the baffle is located outside the input end of the furnace body and can shield the input end of the furnace body.

[0013] As a preferred embodiment of the present invention, a force-bearing rod is fixedly connected to the surface of the baffle, and a roller is movably connected to the side of the force-bearing rod away from the baffle through a pin, and the outer surface of the roller contacts the top of the push rod.

[0014] As a preferred embodiment of the present invention, a connecting frame is fixedly connected to the surface of the furnace body and is arranged around the outside of the processing material, and guide rods are fixedly connected to the four corners of the top of the connecting plate, and the guide rods pass through the connecting frame on the side away from the connecting plate and are slidably connected to the connecting frame.

[0015] As a preferred embodiment of the present invention, the top of the connecting plate is connected to an exhaust pipe, the exhaust pipe passes through the connecting frame on the side away from the connecting plate and extends to the top of the connecting frame, and a purification structure is provided on the top of the connecting frame, which can process the flue gas discharged from the exhaust pipe.

[0016] As a preferred embodiment of the present invention, the purification structure includes a processing box fixedly connected to the top of the connecting frame, a filter element fixedly connected to the interior of the processing box, the filter element wrapped on the surface of the exhaust pipe, a dividing pipe sleeved on the surface of the filter element fixedly connected to the top of the inner wall of the processing box, a diverter plate fixedly connected to the surface of the dividing pipe, the top of the diverter plate is provided with an adsorption material filled in the interior of the processing box, and the top of the processing box is connected to a discharge pipe.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The present invention uses a preheating structure at the top of the furnace body, uses a fan and an annular pipe to extract the flue gas inside the furnace body, and guides the hot flue gas into the air bag at the bottom of the connecting plate through a hose, thereby realizing preheating of the processed materials, improving energy utilization efficiency, reducing the demand for new heat sources, and achieving energy-saving effects.

[0019] 2. The shaft rod, push rod, sleeve plate and slide rod connected by bearings in the present invention can automatically swing according to the horizontal conveying of the processed material, thereby pushing the connecting plate to rise and fall to adjust the spacing, thereby realizing intelligent adjustment of the spacing between the preheating airbag and the processed material, ensuring the consistency of the preheating effect, while reducing manual intervention and improving production efficiency.

[0020] 3. The present invention reduces direct friction between the push rod and the processed material by movably connecting the support roller at one end of the push rod away from the shaft rod, thereby extending the service life of the equipment and ensuring smooth transportation of the processed material.

[0021] 4. The present invention provides a guide rail and a slidable baffle at the input end of the furnace body, which can automatically or manually adjust the position when the processed material enters the furnace body, shield the input end of the furnace body, reduce heat loss, improve the thermal insulation effect in the furnace, and further enhance the energy-saving performance.

[0022] 5. The present invention realizes the linkage between the baffle and the push rod by arranging a force-bearing rod and a roller on the baffle to contact the top of the push rod. This design makes the adjustment of the baffle more flexible and precise, reduces the complexity of operation, and improves the degree of automation of the equipment.

[0023] 6. The present invention can enhance the stability of the connecting plate by fixing a connecting frame surrounding the processing material on the surface of the furnace body and arranging a guide rod on the top of the connecting plate to penetrate the connecting frame for sliding connection, thereby preventing the connecting plate from shifting or shaking during the lifting process, and ensuring the consistency and safety of the preheating effect.

[0024] 7. The present invention arranges an exhaust pipe on the top of the connecting plate to guide the smoke generated during the preheating process to the processing box on the top of the connecting frame for purification, which not only reduces the pollution of the smoke to the environment, but also improves the environmental protection performance of the kiln.

[0025] 8. The present invention performs preliminary filtration on the flue gas through the filter element, and then evenly distributes the flue gas to the adsorption material through the dividing pipe and the diverter plate for deep purification, thereby improving the purification efficiency, extending the service life of the adsorption material, and ensuring that the treated flue gas meets environmental protection standards, further improving the environmental performance of the kiln. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the present invention;

[0027] Figure 2 It is a schematic diagram of the local structure of the present invention;

[0028] Figure 3 It is a schematic cross-sectional view of the purification structure of the present invention;

[0029] Figure 4 This is a schematic diagram of the preheating structure of the present invention;

[0030] Figure 5 It is a schematic diagram of the support structure of the present invention;

[0031] Figure 6 For the present invention Figure 5 Enlarged structural diagram at A in the middle.

[0032] In the figure: 1. furnace body; 2. processing material; 3. preheating structure; 4. annular pipe; 5. fan; 6. hose; 7. connecting plate; 8. air bag; 9. supporting structure; 10. bracket; 11. shaft rod; 12. push rod; 13. sleeve plate; 14. slide rod; 15. support roller; 16. guide rail; 17. baffle; 18. force rod; 19. roller; 20. connecting frame; 21. guide rod; 22. exhaust pipe; 23. purification structure; 24. treatment box; 25. filter element; 26. dividing pipe; 27. diverter plate; 28. adsorption material; 29. ​​discharge pipe. DETAILED DESCRIPTION

[0033] 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.

[0034] like Figures 1 to 6 As shown, the present invention provides a novel energy-saving and environment-friendly intelligent kiln, comprising a furnace body 1;

[0035] A processing material 2 is arranged on one side of the input end of the furnace body 1;

[0036] A preheating structure 3 is provided on the top of the furnace body 1, and the preheating structure 3 includes an annular tube 4 connected to the top of the furnace body 1. A fan 5 connected to the annular tube 4 is fixedly connected to the top of the furnace body 1, and the fan 5 can use the annular tube 4 to extract the smoke inside the furnace body 1. The output end of the fan 5 is connected to a hose 6, and the end of the hose 6 away from the fan 5 is connected to a connecting plate 7. The bottom of the connecting plate 7 is fixedly connected to an air bag 8, and the bottom of the air bag 8 is in contact with the top of the processing material 2. A support structure 9 is provided on the surface of the furnace body 1, and the support structure 9 can push the connecting plate 7 to rise and fall to adjust the spacing.

[0037] refer to Figure 6 The supporting structure 9 includes a bracket 10 fixedly connected to the two ends of the right side of the furnace body 1, and the inner side of the bracket 10 is movably connected with a shaft 11 through a bearing, and a push rod 12 is fixedly connected to the surface of the shaft 11. The processing material 2 can squeeze the push rod 12 to swing during the horizontal transportation process, and the side of the push rod 12 away from the shaft 11 contacts the surface of the processing material 2. The end of the shaft 11 away from the push rod 12 is fixedly connected with a sleeve plate 13, and the side of the sleeve plate 13 away from the shaft 11 extends to the outside of the connecting plate 7. The outside of the connecting plate 7 is fixedly connected with a slide rod 14, and the side of the slide rod 14 away from the connecting plate 7 extends to the inside of the sleeve plate 13 and is slidably connected to the sleeve plate 13.

[0038] As a technical optimization solution of the present invention, the shaft rod 11, push rod 12, sleeve plate 13 and slide rod 14 connected by bearings can automatically swing according to the horizontal conveying of the processing material 2, and then push the connecting plate 7 to rise and fall to adjust the spacing, thereby realizing intelligent adjustment of the spacing between the preheating airbag 8 and the processing material 2, ensuring the consistency of the preheating effect, while reducing manual intervention and improving production efficiency.

[0039] refer to Figure 6 One end of the push rod 12 away from the shaft 11 is movably connected to a support roller 15 through a pin, and the outer surface of the support roller 15 contacts the surface of the processing material 2.

[0040] As a technical optimization solution of the present invention, by movably connecting the support roller 15 at the end of the push rod 12 away from the shaft 11, the direct friction between the push rod 12 and the processing material 2 is reduced, the service life of the equipment is extended, and the smoothness of the transportation of the processing material 2 is ensured.

[0041] refer to Figure 6 A guide rail 16 is fixedly connected to one side of the furnace body 1 close to the support structure 9 , and a baffle 17 is slidably connected to the inner side of the guide rail 16 . The baffle 17 is located on the outer side of the input end of the furnace body 1 and can shield the input end of the furnace body 1 .

[0042] As a technical optimization solution of the present invention, by arranging a guide rail 16 and a slidable baffle 17 at the input end of the furnace body 1, the position can be automatically or manually adjusted when the processed material 2 enters the furnace body 1, thereby shielding the input end of the furnace body 1, reducing heat loss, improving the insulation effect in the furnace, and further enhancing the energy-saving performance.

[0043] refer to Figure 6 A force-bearing rod 18 is fixedly connected to the surface of the baffle 17 , and a roller 19 is movably connected to the side of the force-bearing rod 18 away from the baffle 17 through a pin shaft, and the outer surface of the roller 19 contacts the top of the push rod 12 .

[0044] As a technical optimization solution of the present invention, a force-bearing rod 18 and a roller 19 are arranged on the baffle 17 to contact the top of the push rod 12, thereby realizing the linkage between the baffle 17 and the push rod 12. This design makes the adjustment of the baffle 17 more flexible and precise, reduces the complexity of operation, and improves the degree of automation of the equipment.

[0045] refer to Figure 3 A connection frame 20 is fixedly connected to the surface of the furnace body 1 and is arranged around the outside of the processing material 2. Guide rods 21 are fixedly connected to the four corners of the top of the connecting plate 7. The side of the guide rods 21 away from the connecting plate 7 passes through the connection frame 20 and is slidably connected to the connection frame 20.

[0046] As a technical optimization solution of the present invention, by fixing a connecting frame 20 surrounding the processing material 2 on the surface of the furnace body 1, and arranging a guide rod 21 on the top of the connecting plate 7 to penetrate the connecting frame 20 for sliding connection, the stability of the connecting plate 7 can be enhanced, and the displacement or shaking during the lifting process can be prevented, thereby ensuring the consistency and safety of the preheating effect.

[0047] refer to Figure 3 The top of the connecting plate 7 is connected to an exhaust pipe 22, and the exhaust pipe 22 passes through the connecting frame 20 on the side away from the connecting plate 7 and extends to the top of the connecting frame 20. A purification structure 23 is provided on the top of the connecting frame 20, and the purification structure 23 can process the flue gas discharged from the exhaust pipe 22.

[0048] As a technical optimization solution of the present invention, an exhaust pipe 22 is arranged on the top of the connecting plate 7 to guide the flue gas generated during the preheating process to the processing box 24 on the top of the connecting frame 20 for purification, which not only reduces the pollution of the flue gas to the environment, but also improves the environmental protection performance of the kiln.

[0049] refer to Figure 3 The purification structure 23 includes a processing box 24 fixedly connected to the top of the connecting frame 20, a filter element 25 is fixedly connected to the inside of the processing box 24, the filter element 25 is wrapped around the surface of the exhaust pipe 22, a dividing pipe 26 sleeved on the surface of the filter element 25 is fixedly connected to the top of the inner wall of the processing box 24, a diverter plate 27 is fixedly connected to the surface of the dividing pipe 26, an adsorption material 28 filled in the processing box 24 is arranged on the top of the diverter plate 27, and the top of the processing box 24 is connected to a discharge pipe 29.

[0050] As a technical optimization scheme of the present invention, the flue gas is initially filtered through the filter element 25, and then evenly distributed to the adsorption material 28 through the dividing pipe 26 and the diverter plate 27 for deep purification, thereby improving the purification efficiency, extending the service life of the adsorption material 28, and ensuring that the treated flue gas meets environmental protection standards, further improving the environmental protection performance of the kiln.

[0051] The working principle and use process of the present invention are as follows: the processed material 2 is placed on one side of the input end of the furnace body 1, ready to enter the kiln for heating treatment. During the horizontal transportation process, the processed material 2 is swung by squeezing the push rod 12 in the support structure 9. The push rod 12 is designed through the shaft 11 and the sleeve plate 13, so that the connecting plate 7 and the air bag 8 at the bottom can automatically move downward as the processed material 2 moves, so that the bottom of the air bag 8 and the top of the processed material 2 fit each other. When the processed material 2 begins to enter the furnace body 1, the flue gas in the furnace body 1, that is, the hot air and exhaust gas generated in the previous heating process, is extracted by the fan 5 through the annular pipe 4 arranged on the top of the furnace body 1, and the fan 5 conveys the extracted flue gas through the hose 6 to the air bag 8 fixedly connected to the bottom of the connecting plate 7. As the airbag 8 is filled with smoke, the airbag 8 expands and fits tightly against the top of the processing material 2, thereby preheating the processing material 2, effectively utilizing the waste heat in the furnace, and improving energy utilization efficiency. In order to reduce the friction and wear between the push rod 12 and the processing material 2, the end of the push rod 12 away from the shaft 11 is movably connected to the support roller 15 through a pin. The outer surface of the support roller 15 is in contact with the processing material 2, which plays a role of rolling support and guidance, so that the processing material 2 can smoothly enter the furnace body 1. During the preheating process, the flue gas in the airbag 8 may be discharged through the exhaust pipe 22 on the top of the connecting plate 7. The flue gas first enters the processing box 24 fixedly connected to the top of the connecting frame 20. The processing box 24 is provided with a filter element 25. The filter element 25 is wrapped on the surface of the exhaust pipe 22 to perform preliminary filtration on the exhausted flue gas. At the same time, the processing box 24 is also provided with a dividing pipe 26, a diverter plate 27 and an adsorption material 28. The diverter plate 27 is used to evenly distribute the flue gas to the adsorption material 28 to further remove harmful substances in the flue gas. Finally, the purified flue gas is discharged through the exhaust pipe 29 on the top of the processing box 24 to ensure that the exhausted flue gas meets environmental protection standards.

[0052] In summary: the new energy-saving and environment-friendly intelligent kiln, through the preheating structure 3 on the top of the furnace body 1, uses the fan 5 and the annular pipe 4 to extract the flue gas inside the furnace body 1, and introduces the hot flue gas into the air bag 8 at the bottom of the connecting plate 7 through the hose 6, thereby realizing the preheating of the processing material 2, improving the energy utilization efficiency, reducing the demand for new heat sources, and thus achieving the effect of energy saving.

[0053] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0054] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A new type of energy-saving and environment-friendly intelligent kiln, comprising a furnace body (1); A processing material (2) arranged on one side of the input end of the furnace body (1); Features: A preheating structure (3) is arranged on the top of the furnace body (1), and the preheating structure (3) comprises an annular tube (4) connected to the top of the furnace body (1). A fan (5) connected to the annular tube (4) is fixedly connected to the top of the furnace body (1), and the fan (5) can extract smoke from the furnace body (1) by means of the annular tube (4). The output end of the fan (5) is connected to a hose (6), and the end of the hose (6) away from the fan (5) is connected to a connecting plate (7). The bottom of the connecting plate (7) is fixedly connected to an air bag (8), and the bottom of the air bag (8) contacts the top of the processed material (2). A support structure (9) is arranged on the surface of the furnace body (1), and the support structure (9) can push the connecting plate (7) to rise and fall to adjust the spacing.

2. According to claim 1, a new type of energy-saving and environment-friendly intelligent kiln is characterized by: The support structure (9) comprises a bracket (10) fixedly connected to the two ends of the right side of the furnace body (1); the inner side of the bracket (10) is movably connected to a shaft (11) through a bearing; the surface of the shaft (11) is fixedly connected to a push rod (12); the processing material (2) can squeeze the push rod (12) to swing during horizontal transportation; the side of the push rod (12) away from the shaft (11) contacts the surface of the processing material (2); the end of the shaft (11) away from the push rod (12) is fixedly connected to a sleeve plate (13); the side of the sleeve plate (13) away from the shaft (11) extends to the outside of the connecting plate (7); the outside of the connecting plate (7) is fixedly connected to a slide rod (14); the side of the slide rod (14) away from the connecting plate (7) extends to the inside of the sleeve plate (13) and is slidably connected to the sleeve plate (13).

3. According to claim 2, a new type of energy-saving and environment-friendly intelligent kiln is characterized by: One end of the push rod (12) away from the shaft rod (11) is movably connected to a support roller (15) via a pin, and the outer surface of the support roller (15) is in contact with the surface of the processing material (2).

4. The new energy-saving and environment-friendly intelligent kiln according to claim 2 is characterized by: A guide rail (16) is fixedly connected to one side of the furnace body (1) close to the support structure (9), and a baffle (17) is slidably connected to the inner side of the guide rail (16); the baffle (17) is located outside the input end of the furnace body (1) and is capable of shielding the input end of the furnace body (1).

5. The new energy-saving and environment-friendly intelligent kiln according to claim 4 is characterized in that: A force-bearing rod (18) is fixedly connected to the surface of the baffle (17), and a roller (19) is movably connected to the side of the force-bearing rod (18) away from the baffle (17) via a pin shaft, and the outer surface of the roller (19) contacts the top of the push rod (12).

6. The new energy-saving and environment-friendly intelligent kiln according to claim 1 is characterized by: A connection frame (20) is fixedly connected to the surface of the furnace body (1) and is arranged around the outside of the processing material (2). The four corners of the top of the connection plate (7) are fixedly connected to guide rods (21). The side of the guide rods (21) away from the connection plate (7) passes through the connection frame (20) and is slidably connected to the connection frame (20).

7. The new energy-saving and environment-friendly intelligent kiln according to claim 6 is characterized by: The top of the connecting plate (7) is connected to an exhaust pipe (22); the exhaust pipe (22) passes through the connecting frame (20) on a side away from the connecting plate (7) and extends to the top of the connecting frame (20); a purification structure (23) is provided on the top of the connecting frame (20); and the purification structure (23) is capable of processing the flue gas discharged from the exhaust pipe (22).

8. The new energy-saving and environment-friendly intelligent kiln according to claim 7 is characterized in that: The purification structure (23) comprises a treatment box (24) fixedly connected to the top of the connection frame (20); a filter element (25) is fixedly connected to the inside of the treatment box (24); the filter element (25) is wrapped around the surface of the exhaust pipe (22); a splitter pipe (26) sleeved on the surface of the filter element (25) is fixedly connected to the top of the inner wall of the treatment box (24); a diverter plate (27) is fixedly connected to the surface of the diverter plate (27); an adsorbent material (28) filled in the treatment box (24) is arranged on the top of the diverter plate (27); and a discharge pipe (29) is connected to the top of the treatment box (24).

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