Cold and hot separation system of sludge belt dryer

Abstract

The utility model discloses a sludge belt dryer cold and hot separation system which comprises a hot air drying bin, a cooling bin and a conversion bin, the upper end of the conversion bin is communicated with the hot air drying bin, the lower end of the conversion bin is communicated with the cooling bin, the discharging end of the hot air drying bin is located over the conversion bin, and the feeding end of the cooling bin is located under the conversion bin. A horizontal rotating shaft is installed in the conversion bin, at least three sets of partition blades are fixed to the horizontal rotating shaft, all the partition blades are distributed in the annular direction of the horizontal rotating shaft, the partition blades are rectangular, one long side of each partition blade is parallel to the length direction of the horizontal rotating shaft and connected with the horizontal rotating shaft, and the short side of each partition blade is arranged in the radial direction of the horizontal rotating shaft. One end of the horizontal rotating shaft extends out of the conversion bin and is connected with a driving mechanism. The utility model has the obvious effects that the cold area and the hot area of the sludge belt dryer can be isolated stably and for a long time, and the cold area and the hot area are relatively independent and do not interfere with each other, so that the stable production is maintained.

Description

Technical Field

[0001] The utility model relates to the technical field of environmental protection, in particular to a sludge drying technology. Background Art

[0002] Sludge drying can be achieved using a two-stage thermal drying process. The two-stage drying system primarily consists of an upper drying zone, a lower drying zone, and a cooling zone. The upper and lower drying zones thermally dry the sludge, while the cooling zone cools the dried sludge. The upper and lower drying zones are located within the same hot air drying chamber, while the cooling zone is located within the cooling chamber. The hot air drying chamber and the cooling chamber are installed adjacent to each other but independently. A channel connecting the lower drying and cooling chambers is provided between the two chambers. After hot air drying, the sludge falls through this channel onto the cooling chamber.

[0003] To prevent airflow interference between the two chambers, existing technologies employ several rubber membranes within the channel. When sludge falls, the membranes push down, opening the channel. When sludge is clear, the membranes automatically spring back up, closing or shrinking the channel, thereby separating the cold air from the hot air. However, over time, the rubber membranes fatigue and break, compromising the isolation between the hot and cold chambers. Utility Model Content

[0004] In view of this, the utility model provides a solution that can stably separate the cold zone and hot zone of the sludge belt dryer. The main technical solutions adopted are as follows:

[0005] A hot and cold separation system for a sludge belt dryer includes a hot air drying chamber, a cooling chamber, and a conversion chamber. The upper end of the conversion chamber is connected to the hot air drying chamber, and the lower end of the conversion chamber is connected to the cooling chamber. The discharge end of the hot air drying chamber is located directly above the conversion chamber, and the feed end of the cooling chamber is located directly below the conversion chamber. The main features are:

[0006] A horizontal rotating shaft is installed in the conversion bin, and at least three groups of partition blades are fixed on the horizontal rotating shaft. All the partition blades are distributed circumferentially around the horizontal rotating shaft. The partition blades are rectangular, and one long side of a single partition blade is parallel to the length direction of the horizontal rotating shaft and connected to it. The short side of a single partition blade is arranged radially along the horizontal rotating shaft. One end of the horizontal rotating shaft extends out of the conversion bin and is connected to a driving mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a structural diagram of the utility model;

[0008] Figure 2 It is a structural diagram of the conversion chamber c;

[0009] Figure 3Schematic diagram of the connection between the separating blade 2 and the horizontal rotating shaft 1;

[0010] Figure 4 It is a schematic diagram of the matching relationship between the separation blade 2 and the conversion chamber c. DETAILED DESCRIPTION

[0011] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0012] like Figure 1 、 2 As shown in Figures 3 and 4, a hot and cold separation system of a sludge belt dryer comprises a hot air drying chamber a, a cooling chamber b and a conversion chamber c. The upper end of the conversion chamber c is connected to the hot air drying chamber a, and the lower end of the conversion chamber c is connected to the cooling chamber b. The discharge end of the hot air drying chamber a is located directly above the conversion chamber c, and the feed end of the cooling chamber b is located directly below the conversion chamber c.

[0013] The hot air drying bin a is provided with a hot bin interface with an opening facing downward, and the cooling bin b is provided with a cold bin interface with an opening facing upward, and both the hot bin interface and the cold bin interface are rectangular openings. Accordingly, the conversion bin c is provided with a hot bin sub-interface opposite to the hot bin interface, and the conversion bin c is provided with a cold bin sub-interface opposite to the cold bin interface. The hot air drying bin a and the conversion bin c are connected through the hot bin interface-hot bin sub-interface, and the two are flange-connected; the conversion bin c and the cooling bin b are connected through the cold bin interface-cold bin sub-interface, and the two are flange-connected.

[0014] At least one drying conveyor belt is provided in the hot air drying chamber a, the discharge end of the drying conveyor belt is located directly above the conversion chamber c, and a hot air inlet is provided below the drying conveyor belt, and hot air is blown out from the hot air inlet to dry the wet sludge on the drying conveyor belt;

[0015] A cooling conveyor belt is provided in the cooling bin b, and the feed end of the cooling conveyor belt is located directly below the conversion bin c. A cold air inlet is provided below the cooling conveyor belt, and natural air is blown out from the cold air inlet to cool the hot sludge on the cooling conveyor belt.

[0016] In order to avoid the hot air in the hot air drying chamber a and the cold air in the cooling chamber b from interfering with each other and affecting their respective effects, the following isolation mechanism is provided in the conversion chamber c:

[0017] A horizontal rotating shaft 1 is installed in the conversion bin c, and at least three groups of partition blades 2 are fixed on the horizontal rotating shaft 1. All the partition blades 2 are distributed circumferentially around the horizontal rotating shaft 1. The partition blades 2 are rectangular. One long side of a single partition blade 2 is parallel to the length direction of the horizontal rotating shaft 1 and is connected to it. The short side of a single partition blade 2 is arranged radially along the horizontal rotating shaft 1. One end of the horizontal rotating shaft 1 extends out of the conversion bin c and is connected to a driving mechanism 3.

[0018] Two curved plates 4 are provided on the left and right sides of the conversion chamber c. The two curved plates 4 are arranged around the horizontal rotation axis 1, with the concave surfaces of the curved plates 4 facing the horizontal rotation axis 1. A vertical channel is provided between the two curved plates 4.

[0019] During the rotation of the horizontal rotating shaft 1 , the outer long side of the separating blade 2 is in rotational contact with the concave surface of the arc-shaped plate 4 .

[0020] An upper guide plate 41 and a lower support plate 42 are connected to the side of the curved plate 4 facing away from the horizontal rotation axis 1. The upper guide plate 41 is arranged obliquely, and the upper edge of the upper guide plate 41 is connected to the inner wall of the conversion bin c, and the lower edge of the upper guide plate 41 is connected to the upper edge of the curved plate 4;

[0021] The lower support plate 42 connects the upper edge of the arc plate 4 and the inner wall of the conversion chamber c, and the end of the arc plate 4 is connected to the inner wall of the conversion chamber c.

[0022] The separating blade 2 includes a blade body 21 and a rotating sealing film 22. The blade body 21 is made of a hard material (for example, a stainless steel sheet). The inner long side of the blade body 21 is fixedly connected to the horizontal rotating shaft 1. The outer long side of the blade body 21 is provided with the rotating sealing film 22. The rotating sealing film 22 is in rotational contact with the concave surface of the arc plate 4.

[0023] The two short sides of the blade body 21 are respectively connected with end sealing films 23 , and the end sealing films 23 are in rotational contact with the inner wall of the conversion chamber c.

[0024] The sludge falls from the hot air drying chamber a into the conversion chamber c and accumulates between the partition blades 2. The sludge enters the cooling chamber b as the partition blades 2 rotate. The rotating sealing film 22 and the end sealing film 23 can block the gaps at the edge.

[0025] The number of the partition blades 2 is n, and all the partition blades 2 are evenly distributed in the circumferential direction around the horizontal rotation axis 1. The arc surface of the arc plate 4 is a circular arc, and the center line of the arc surface of the arc plate 4 coincides with the center line of the horizontal rotation axis 1. The radius of the arc plate 4 is R, and the arc length L of the arc plate 4 is ≥ 2πR / n.

[0026] In this embodiment, the number of the partition blades 2 is 4, and the arc length L of the arc plate 4 is ≥πR / 2.

[0027] The driving mechanism 3 includes a motor and a reduction mechanism. The housing of the motor is fixed to the outer wall of the conversion chamber c. The output shaft of the motor is connected to the input shaft of the reduction mechanism. The output shaft of the reduction mechanism is connected to the horizontal rotation shaft 1.

[0028] Beneficial effect: The technical solution of the utility model can play a stable and long-term isolation role on the cold zone and hot zone of the sludge belt dryer, ensuring that the cold zone and the hot zone are relatively independent and do not interfere with each other, thereby maintaining stable production.

[0029] Finally, it should be noted that the above description is only a preferred embodiment of the present invention. Under the guidance of the present invention, ordinary technicians in this field can make various similar expressions without violating the purpose and claims of the present invention. Such changes fall within the scope of protection of the present invention.

Claims

1. A hot and cold separation system for a sludge belt dryer, comprising a hot air drying chamber (a), a cooling chamber (b), and a conversion chamber (c), wherein the upper end of the conversion chamber (c) is connected to the hot air drying chamber (a), and the lower end of the conversion chamber (c) is connected to the cooling chamber (b), the discharge end of the hot air drying chamber (a) is located directly above the conversion chamber (c), and the feed end of the cooling chamber (b) is located directly below the conversion chamber (c), characterized in that: A horizontal rotating shaft (1) is installed in the conversion chamber (c), and at least three groups of partition blades (2) are fixed on the horizontal rotating shaft (1). All the partition blades (2) are distributed in the circumferential direction around the horizontal rotating shaft (1). The partition blades (2) are rectangular. One long side of a single partition blade (2) is parallel to the length direction of the horizontal rotating shaft (1) and is connected thereto. The short side of a single partition blade (2) is arranged along the radial direction of the horizontal rotating shaft (1). One end of the horizontal rotating shaft (1) extends out of the conversion chamber (c) and is connected to a driving mechanism (3).

2. The hot and cold separation system of the sludge belt dryer according to claim 1 is characterized by: Two arc-shaped plates (4) are arranged opposite each other in the conversion chamber (c), and the two arc-shaped plates (4) are arranged around the horizontal rotation axis (1), with the concave surfaces of the arc-shaped plates (4) facing the horizontal rotation axis (1), and a vertical channel is provided between the two arc-shaped plates (4); During the rotation of the horizontal rotating shaft (1), the outer long sides of the separating blades (2) are in rotational contact with the concave surface of the arc-shaped plate (4).

3. The hot and cold separation system of the sludge belt dryer according to claim 2 is characterized by: An upper guide plate (41) and a lower support plate (42) are connected to the side of the arc-shaped plate (4) facing away from the horizontal rotation shaft (1); the upper guide plate (41) is arranged obliquely; the upper edge of the upper guide plate (41) is connected to the inner wall of the conversion chamber (c); and the lower edge of the upper guide plate (41) is connected to the upper edge of the arc-shaped plate (4); The lower support plate (42) connects the upper edge of the arc-shaped plate (4) and the inner wall of the conversion chamber (c).

4. The hot and cold separation system of the sludge belt dryer according to claim 2 or 3, characterized in that: The partition blade (2) comprises a blade body (21) and a rotating sealing film (22), wherein the blade body (21) is made of a hard material, the inner long side of the blade body (21) is fixedly connected to the horizontal rotation shaft (1), and the outer long side of the blade body (21) is provided with the rotating sealing film (22), and the rotating sealing film (22) is in rotational contact with the concave surface of the arc plate (4).

5. The hot and cold separation system of the sludge belt dryer according to claim 4 is characterized in that: The two short sides of the blade body (21) are respectively connected with end sealing films (23), and the end sealing films (23) are in rotational contact with the inner wall of the conversion chamber (c).

6. The hot and cold separation system of the sludge belt dryer according to claim 2, characterized in that: The number of the partition blades (2) is n, and all the partition blades (2) are evenly distributed in the circumferential direction around the horizontal rotation axis (1); The arc surface of the arc plate (4) is a circular arc, the center line of the arc surface of the arc plate (4) coincides with the center line of the horizontal rotation shaft (1), and the radius of the arc plate (4) is R; The arc length L of the arc plate (4) is ≥ 2πR / n.

7. The hot and cold separation system of the sludge belt dryer according to claim 1, 2, 3 or 6, characterized in that: The hot air drying chamber (a), the conversion chamber (c) and the cooling chamber (b) are respectively connected via flanges.

8. The hot and cold separation system of the sludge belt dryer according to claim 1, 2, 3 or 6, characterized in that: A drying conveyor belt is provided in the hot air drying chamber (a), the discharge end of the drying conveyor belt is located directly above the conversion chamber (c), and a hot air inlet is provided below the drying conveyor belt; A cooling conveyor belt is provided in the cooling bin (b), a feed end of the cooling conveyor belt is located directly below the conversion bin (c), and a cold air inlet is distributed below the cooling conveyor belt.

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