Dustproof structure of low-temperature sludge drying machine

Abstract

The utility model discloses a dustproof structure of a low-temperature sludge drying machine, which belongs to the field of low-temperature sludge drying machines and comprises a hot-air blower, a drying chamber is arranged above the hot-air blower, conveying mesh belts are uniformly arranged in the drying chamber up and down, a slitter is arranged on one side of the top of the drying chamber and is communicated with the inside of the drying chamber, and the slitter is communicated with the inside of the drying chamber. An air collecting cover used for collecting exhausted waste gas is installed on the upper surface of the drying chamber through bolts, a backflow air cylinder is connected to the top of the air collecting cover, the section of the backflow air cylinder is in a semicircular ring shape, the bottom of the backflow air cylinder communicates with a dust removal box through bolts, and air pipes are symmetrically connected to the bottom of the dust removal box. The dust removal box is arranged at the bottom of the backflow air duct, so that backflow waste gas is filtered through the dust removal box, dust particles in the waste gas are left on the inner wall of the dustproof cloth bag, when cleaning is needed, the bottom of the dustproof cloth bag can be pulled out through the maintenance window in the outer side surface of the dustproof box, and the dust particles accumulated in the dustproof cloth bag can be poured out.

Description

Technical Field

[0001] The utility model relates to the field of low-temperature sludge drying machines, and more specifically, to a dust-proof structure of a low-temperature sludge drying machine. Background Art

[0002] A low-temperature sludge dryer is a device used to treat sludge. It primarily utilizes low-temperature drying technology, introducing low-temperature hot air into the drying chamber through a hot air circulation system to exchange heat with the sludge. At relatively low temperatures (generally between 40°C and 80°C), the water in the sludge gradually evaporates, drying the sludge. This low-temperature drying method prevents the decomposition of organic matter in the sludge at high temperatures, producing harmful gases, while also reducing energy consumption. In order to reduce energy consumption, existing dryers recycle the hot and humid gas discharged from the top and form new dry hot air through a heat exchanger for recycling. However, the discharged hot and humid gas contains a large amount of dust, which can damage the heat exchanger at the bottom. Therefore, a corresponding dust-proof structure needs to be added to filter the particulate matter in the exhaust gas. In the existing technology, dust-proof bags are mostly used for particle filtration of exhaust gas. After long-term use, a large amount of particulate matter will adhere to the inner wall of the dust-proof bag. These particulate matter will affect the flow of gas and cause the internal pressure to increase. Therefore, regular treatment is required. When cleaning the dust-proof bag, the existing equipment needs to be shut down and the bag needs to be taken out. This cleaning method affects efficiency. Utility Model Content

[0003] 1. Technical problems to be solved

[0004] In view of the problems existing in the prior art, the purpose of the present invention is to provide a dust-proof structure for a low-temperature sludge dryer, which can clean the internal dust without removing the dust bag.

[0005] 2. Technical solution

[0006] In order to solve the above problems, the present invention adopts the following technical solutions.

[0007] The top of the dust collecting box is connected with the dust collecting box top, and the bottom of the dust collecting box is connected with the dust collecting box bottom by bolts.

[0008] Furthermore, the front side of the bottom of the dust storage barrel is tilted downward, a dust outlet hole is opened on the lower surface of the front side of the dust storage barrel, and a sealing plug is inserted and removed inside the dust outlet hole.

[0009] Furthermore, the bottom of the dust removal box has a conical structure, and the outer surface of the conical dust bag is equidistant from the inner wall of the cone at the bottom of the limiting ring.

[0010] Furthermore, bosses are symmetrically provided on the front surface of the dust removal box, and sliding holes are opened on the inner sides of the bosses, and the sliding holes are connected to the interior of the dust removal box.

[0011] Furthermore, an impact head is slidably installed inside the sliding hole, the end of the impact head contacts the surface of the conical dust bag, a connecting rod is provided at the front end of the impact head, the connecting rod passes through the boss, and a pull plate is provided at the end of the connecting rod away from the impact head, and the pull plate is placed on the front side of the boss.

[0012] Furthermore, a spring is sleeved on the surface of the connecting rod, the spring is placed inside the sliding hole, and one end of the spring is in contact with the surface of the end of the impact head.

[0013] 3. Beneficial effects

[0014] Compared with the prior art, the advantages of the present invention are: the present invention provides a dust-proof structure for a sludge low-temperature dryer, and a dust removal box is arranged at the bottom of the return air duct, so that the return exhaust gas passes through the dust removal box for filtration, and the dust particles in the exhaust gas will be retained on the inner wall of the dust bag. When cleaning is required, the bottom of the dust bag can be pulled out through the maintenance window on the outer surface of the dust box, and the dust particles accumulated inside can be poured out. Before cleaning, the dust bag can be hit by the impact head so that the dust on the inner wall of the bag will fall into the dust collection tube at the bottom, thereby ensuring the cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the three-dimensional structure of the low-temperature drying machine of the present utility model;

[0016] Figure 2 This is a schematic diagram of the dustproof tube structure of the present utility model;

[0017] Figure 3 This is a schematic diagram of the cross-sectional structure of the impact head installation of the utility model;

[0018] Figure 4 This is a schematic diagram of the three-dimensional structure of the conical dust bag of the present invention.

[0019] Explanation of the numbers in the figure: 1. Hot air blower; 2. Drying chamber; 3. Strip cutter; 4. Air collecting hood; 5. Return air duct; 6. Dust removal box; 61. Limiting platform; 62. Maintenance window; 63. Sealing plate; 64. Boss; 65. Sliding hole; 7. Limiting ring; 71. Conical dust bag; 72. Dust collection cylinder; 73. Sealing plug; 8. Impact head; 81. Connecting rod; 82. Pull plate; 83. Spring; 9. Air duct. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0021] Example:

[0022] See also Figure 1 、 Figure 2 and Figure 4As shown, a dust-proof structure of a sludge low-temperature dryer includes a hot air blower 1, a drying chamber 2 is arranged above the hot air blower 1, and conveyor belts are evenly arranged up and down inside the drying chamber 2. A strip cutter 3 is provided on one side of the top of the drying chamber 2, and the strip cutter 3 is connected to the drying chamber 2. The sludge after stripping will fall onto the conveyor belt, so that the moisture in the sludge can be taken away by the hot air flowing through. An air collecting hood 4 for collecting the exhausted gas is installed on the upper surface of the drying chamber 2 by bolts to collect the exhausted hot and humid exhaust gas. A return air duct 5 is connected to the top of the air collecting hood 4. The cross-section of the return air duct 5 is semicircular. The bottom of the return air duct 5 is connected to a dust removal box 6 by bolts, and then the humid and hot air blown upward is diverted and returned to the inside of the dust removal box 6. The bottom of the dust removal box 6 is symmetrically connected It is connected to an air duct 9, and the bottoms of multiple air ducts 9 are connected to the air inlet side of the hot air blower 1 to realize the backflow of hot air. A limit platform 61 is symmetrically arranged on the upper part of the dust removal box 6, and a limit ring 7 is installed inside the limit platform 61. The limit ring 7 is a rectangular frame structure, and a conical dust bag 71 is arranged at the bottom of the limit ring 7. The bottom of the conical dust bag 71 is connected to a dust collection barrel 72. The dust inside the conical dust bag 71 will fall down into the dust collection barrel 72. A maintenance window 62 is symmetrically provided on the front surface of the dust removal box 6. The maintenance window 62 corresponds to the position of the dust collection barrel 72, so that the dust collection barrel 72 can be pulled out through the maintenance window 62. A sealing plate 63 is installed on the front side of the maintenance window 62 by bolts to keep the maintenance window 62 sealed during work to prevent air leakage.

[0023] Please refer to Figure 4 As shown, the front bottom side of the dust collecting barrel 72 is tilted downward, so that the dust inside will flow forward and downward to facilitate dust discharge. A dust outlet hole is opened on the lower front surface of the dust collecting barrel 72, and a sealing plug 73 is inserted and removed inside the dust outlet hole. The sealing plug 73 keeps the dust outlet hole sealed to prevent dust leakage.

[0024] Please refer to Figure 2 As shown, the bottom of the dust removal box 6 is a conical structure, and the outer surface of the conical dust bag 71 is equidistant from the inner wall of the cone at the bottom of the limiting ring 7, so that the hot and humid air flows downward through the conical dust bag 71. The conical dust bag 71 has four conical surfaces, and the four conical surfaces are at the same distance from the inner wall of the dust removal box 6 to maintain the stability of the flow rate.

[0025] Please refer to Figure 2 and Figure 3As shown, the front surface of the dust removal box 6 is symmetrically provided with a boss 64, and the inner side of the boss 64 is provided with a sliding hole 65, which is connected to the interior of the dust removal box 6, and the sliding hole 65 is slidably installed inside the sliding hole 65. The end of the impact head 8 is in contact with the surface of the conical dust-proof cloth bag 71. The impact head 8 can be quickly moved to impact the conical dust-proof cloth bag 71 so that the dust attached to the inner wall of the conical dust-proof cloth bag 71 falls downward. A connecting rod 81 is provided at the front end of the impact head 8, and the connecting rod 81 passes through the boss 64. A pull plate 82 is provided at the end of the connecting rod 81 away from the impact head 8. The pull plate 82 is placed on the front side of the boss 64 to facilitate the control of the impact head 8 from the outside.

[0026] Among them, a spring 83 is sleeved on the surface of the connecting rod 81, and the spring 83 is placed inside the sliding hole 65. One end of the spring 83 contacts the end surface of the impact head 8. The elastic force of the spring 83 can make the impact head 8 return quickly to achieve impact.

[0027] Working principle: The sludge is transported to the inside of the strip cutter 3 through a spiral conveying mechanism, and then the sludge is cut into strips and falls onto the conveyor belt inside the drying chamber 2. It is circulated and transported through a multi-layer conveyor network, and hot air is blown upward by the hot air blower 1 to remove the moisture in the sludge. The flying exhaust gas generated at this time is blown upward and passed into the inside of the wind collecting hood 4, and returned to the inside of the dust removal box 6 through the return air duct 5, and flows downward. At this time, the exhaust gas passes through the conical dust bag 71 and flows into the inside of the air duct 9, and then returns to the air inlet end of the hot air blower 1. After regular use, a large amount of dust will adhere to the inner wall of the conical dust bag 71, affecting the ventilation effect. Then the outer pull plate 82 can pull the impact head 8 into the sliding hole 65. At this time, the spring 83 is squeezed and accumulates force. After releasing the pull plate 82, the impact head 8 can rebound quickly and impact the conical dust bag 71, so that the dust attached to the inner wall of the conical dust bag 71 will fall down into the dust collection tube 72. At this time, open the sealing plate 63, pull out the dust collection tube 72 through the maintenance window 62, and pull out the sealing plug 73. At this time, the dust can be discharged through the dust removal hole.

[0028] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any person skilled in the art who, within the technical scope disclosed in the present invention, makes equivalent substitutions or modifications based on the technical solutions and improved concepts of the present invention shall be covered by the scope of protection of the present invention.

Claims

1. A dust-proof structure for a low-temperature sludge drying machine, comprising a hot air blower (1), a drying chamber (2) disposed above the hot air blower (1), and conveyor mesh belts uniformly arranged above and below the drying chamber (2), characterized in that: A strip cutter (3) is provided on one side of the top of the drying chamber (2), and the strip cutter (3) is connected to the inside of the drying chamber (2). A wind collecting hood (4) for collecting and discharging exhaust gas is installed on the upper surface of the drying chamber (2) by bolts. The top of the wind collecting hood (4) is connected to a return air duct (5). The cross section of the return air duct (5) is semicircular. The bottom of the return air duct (5) is connected to a dust removal box (6) by bolts. The bottom of the dust removal box (6) is symmetrically connected to air ducts (9). The bottoms of multiple air ducts (9) are connected to the hot air duct. On the air inlet side of the machine (1), a limiting platform (61) is symmetrically arranged above the interior of the dust removal box (6), a limiting ring (7) is installed inside the limiting platform (61), a conical dustproof cloth bag (71) is arranged at the bottom of the limiting ring (7), and a dust collection barrel (72) is connected to the bottom of the conical dustproof cloth bag (71), and a maintenance window (62) is symmetrically opened on the front surface of the dust removal box (6), the maintenance window (62) corresponds to the position of the dust collection barrel (72), and a sealing plate (63) is installed on the front side of the maintenance window (62) through bolts.

2. The dust-proof structure of the low-temperature sludge drying machine according to claim 1, characterized in that: The front side of the bottom of the dust collecting cylinder (72) is tilted downward, and a dust outlet hole is provided on the lower surface of the front side of the dust collecting cylinder (72), and a sealing plug (73) is inserted and pulled out of the dust outlet hole.

3. The dust-proof structure of the low-temperature sludge drying machine according to claim 2 is characterized by: The bottom of the dust removal box (6) is in a conical structure, and the outer surface of the conical dust bag (71) is equidistant from the inner wall of the conical cylinder at the bottom of the limiting ring (7).

4. The dust-proof structure of the low-temperature sludge drying machine according to claim 1 is characterized by: A boss (64) is symmetrically provided on the front surface of the dust removal box (6), a sliding hole (65) is provided inside the boss (64), and the sliding hole (65) is communicated with the interior of the dust removal box (6).

5. The dust-proof structure of the low-temperature sludge drying machine according to claim 4 is characterized in that: An impact head (8) is slidably mounted inside the sliding hole (65), and the end of the impact head (8) contacts the surface of the conical dust bag (71). A connecting rod (81) is provided at the front end of the impact head (8), and the connecting rod (81) passes through the boss (64). A pull plate (82) is provided at the end of the connecting rod (81) facing away from the impact head (8), and the pull plate (82) is placed on the front side of the boss (64).

6. The dust-proof structure of the low-temperature sludge drying machine according to claim 5, characterized in that: A spring (83) is sleeved on the surface of the connecting rod (81), and the spring (83) is placed inside the sliding hole (65). One end of the spring (83) contacts the end surface of the impact head (8).

Images