WO2016110221A1

WO2016110221A1 - Bridge-shaped member of sludge drying device for bottom ventilation and sludge drying device

Info

Publication number: WO2016110221A1
Application number: PCT/CN2015/100110
Authority: WO
Inventors: 谭玮
Original assignee: 广州新致晟环保科技机械设备有限公司
Priority date: 2015-01-07
Filing date: 2015-12-31
Publication date: 2016-07-14
Also published as: KR101972886B1; JP2018502714A; CN105819655B; TW201641447A; KR20170101966A; CN105819655A; TWI680947B; HK1222641A1

Abstract

A bridge-shaped member (401) for a sludge drying device (1), the bottom of a drying chamber (6) of the device (1) having a flat or a concave surface and a communication port (5) in communication with the outside being formed on the surface thereof. The bridge-shaped member (401) spans the communication port (5) in a length direction of the communication port (5), two ends of the bridge-shaped member (401) are fixedly connected to the bottom of the drying chamber (6) near the two ends of the communication port (5), and the bridge-shaped member (401) covers the communication port (5) in a width direction so as to form a side opening (402) between the bridge-shaped member (401) and the bottom of the drying chamber (6). A curved path from the communication port (5) to the side opening (402) allows dry gas to enter into the drying chamber (6) from outside. The position of the bridge-shaped member (401) corresponds to a mixing device (7) disposed inside the drying chamber (6), the mixing device (7) comprising a rotating shaft (701) and a mixing assembly (702) fixed on the rotating shaft (701), and being configured to enable a side edge of a front end of the mixing assembly (702) to scrape off sludge near the side opening (402) during rotation of the rotating shaft (701). Also provided is a sludge drying device (1) using the bridge-shaped member (401).

Description

Bridge member and sludge drying device for sludge drying device for bottom ventilation

Technical field

The present invention relates to the field of sludge drying, and to a bridge member, and more particularly to a bridge member used on the bottom of a drying chamber of a bottom dry sludge drying device in a monomer form. The invention also relates to a sludge drying device using a bridge.

Background technique

In the sludge drying apparatus, the sludge is generally dried by passing a dry gas to the bottom or side of the drying chamber. In order to prevent the sludge from leaking out from the bottom, slits or small holes are formed in the bottom of the drying chamber to blow dry gas from the slit or the small hole, so that the sludge can be dried and the sludge can be moved upward. However, this drying method can only dry a small amount of sludge, and it is difficult to achieve a large-scale sludge drying operation.

Chinese invention patent CN101186422A proposes a closed multi-chamber fluidized bed sludge drying method. The fluidized bed used to transport high pressure gas from the bottom used in this method not only consumes energy but is also inefficient, making it difficult to achieve continuous and large-scale sludge drying.

A Chinese utility model patent CN201000261Y submitted and authorized by the present applicant proposes a sludge low temperature drying device. Although such a drying device can achieve a certain amount of sludge drying, it is difficult to achieve a purpose of drying a large amount of sludge and saving energy by conveying dry gas from small holes in the bottom.

The Chinese Patent Application No. 201510006479.4 proposes a bottom drying type sludge drying device in which the drying gas passes through a communication port formed on the bottom wall along with the turning of the sludge in the first drying chamber. The second drying chamber enters the first drying chamber to dry the sludge layer stacked on the bottom wall from the bottom to the top. However, in the process of sludge drying, sludge is often blocked from the communication port and leaks from the communication port to the second drying chamber, so that it is difficult for the drying gas to smoothly enter the first drying chamber through the communication port, thereby causing sludge. The drying process is progressing slowly.

In order to solve the above problems, it is necessary to propose a new bottom structure to improve the drying efficiency of the sludge.

Summary of the invention

The invention provides a sludge drying device suitable for bottom ventilation in a monomer form Bridge. In the sludge drying apparatus of the present invention, a communication port for allowing outside air to enter the drying chamber is formed on the bottom wall of the drying chamber, wherein a bridge member is provided above the communication port, thereby preventing the bottom from being laid The sludge on the wall leaks out of the drying chamber through the communication port and promotes the smooth flow of the dry gas into the drying chamber.

In the sludge drying device of the present invention, since the bridge member is disposed above the communication port, a side opening is formed in the bridge member and the bottom wall, thereby forming a curved path between the communication port and the side opening, thereby Greatly reduce the leakage of sludge to the outside of the drying room.

In the sludge drying apparatus of the present invention, the bottom wall of the drying chamber may have a flat or concave surface, and the bridge member may be an arch or a plate member, and therefore, the bridge member and the bottom wall of the drying chamber The side openings formed therebetween may be of various shapes.

In the sludge drying apparatus of the present invention, the longitudinal direction of the communication port is substantially perpendicular or perpendicular to the longitudinal direction of the drying chamber, and the longitudinal direction of the bridge member spanning over the communication port is substantially parallel to the longitudinal direction of the communication port. . In addition, the bridge member on the bottom wall may correspond to the flipping assembly of the flipping device disposed in the drying chamber such that the blade or ratchet scraping front end of the flipping assembly can scrape the sludge near the side opening, such that The drying gas flows from the outside to the drying chamber more smoothly.

The present invention also provides a sludge drying device having a bridge member, wherein the sludge drying device has a partition plate or a bottom wall disposed between the first drying chamber and the second drying chamber, A bridge member is disposed above the communication port of the partition plate, so that the dry gas in the second drying chamber can smoothly flow into the first drying chamber, thereby improving sludge drying efficiency.

The drying device of the invention is basically a single form, and has the characteristics of high drying efficiency, low energy consumption, small occupied area and strong adaptability, and is completely suitable for the needs of the current market. Since the sewage treatment plants in densely populated cities are more dispersed, the monomer-based sludge drying device can be configured with little change in equipment in existing sewage treatment plants.

The sludge drying device of the invention solves the problem that the sludge has strong viscosity, is easy to agglomerate and is difficult to be broken. The tipping assembly of the flipping device continuously flips, shears and breaks the sludge in the first drying chamber and the scraping front end of the blade or ratchet of the flipping assembly or the front end of the scraping member fixed to the blade or ratchet The sludge near the side opening increases the frequency of contact of the drying gas with the sludge.

DRAWINGS

The construction, advantages and technical effects of the preferred embodiments of the present invention will be described in detail below with reference to the drawings and specific embodiments, wherein:

Figure 1 is a perspective view of a bridge member disposed above a communication port of a bottom wall of a drying chamber of a bottom dry type sludge drying device;

Figure 2 is a perspective view of the drying chamber of the sludge drying device in which the bridge member is disposed above each of the communication ports on the bottom wall;

Figure 3 is a perspective view showing the position of the flipping device relative to the bridge member provided in the drying chamber shown in Figure 2;

Figure 4 is an enlarged longitudinal cross-sectional view of the circled portion A of Figure 3;

Figure 5 is an enlarged transverse cross-sectional view of the circled portion A of Figure 3;

Figure 6 is a transverse cross-sectional view of another embodiment of the bridge similar to Figure 1;

Figure 7 is a perspective view showing still another embodiment of the bridge member of the present invention;

Figure 7A is a transverse cross-sectional view of the bridge taken along line F-F of Figure 7;

Figure 8 is a perspective view showing still another embodiment of the bridge member of the present invention;

Figure 8A is a transverse cross-sectional view of the bridge taken along line G-G of Figure 8;

Figure 8B is a longitudinal plan cross-sectional view of the bridge taken along line g-g of Figure 8;

Figure 9 is a perspective view showing still another embodiment of the bridge member of the present invention;

Figure 9A is a transverse cross-sectional view of the bridge taken along line I-I of Figure 9;

Figure 10 is a partial longitudinal cross-sectional view of a bottom dry sludge drying apparatus using the bridge of the present invention;

Figure 11 is a transverse cross-sectional view of the sludge drying device of Figure 10;

Figure 12 is a partial perspective view showing another preferred embodiment of the drying chamber of the bottom dry type sludge drying device using the bridge of the present invention;

Figure 13 is a perspective view of the bridge member disposed above the communication port of a portion of the bottom wall of the drying chamber of Figure 12;

Figure 13A is an enlarged transverse cross-sectional view of the circled portion B of Figure 10;

Figure 13B is an enlarged longitudinal cross-sectional view of the circled portion B of Figure 10;

Figure 14 is a transverse cross-sectional view showing still another embodiment of the bridge of the present invention;

Figure 15 is a perspective view showing still another embodiment of the bridge member of the present invention;

Figure 15A is a transverse cross-sectional view of the bridge taken along line L-L of Figure 15;

Figure 16 is a perspective view showing still another embodiment of the bridge member of the present invention;

Figure 16A is a transverse cross-sectional view of the bridge taken along line M-M of Figure 16;

Figure 16B is a longitudinal plan cross-sectional view of the bridge taken along line N-N of Figure 16;

Figure 17 is still another embodiment of the bridge of the present invention;

Figure 17A is a longitudinal cross-sectional view of the bridge taken along the line P-P in Figure 17.

detailed description

Figure 1 shows a preferred embodiment of a bridge used in a bottom dry sludge drying unit in the form of a single unit. As shown in the figure, a communication port 5 passing through the bottom wall is formed in a part of the bottom wall or the bottom portion 4 of the drying chamber of the sludge drying device, and a bridge member 401 is provided above the communication port 5. Fig. 2 shows a preferred embodiment in which a bridge member is provided above the communication port of the bottom wall 4 of the drying chamber 6 of the bottom dry type sludge drying device, and Fig. 3 shows the drying chamber 6 provided in Fig. 2. The position of the inner turning device 7 corresponding to the bridge 401.

Referring to Figures 1-3, the bottom wall 4 of the drying chamber 6 has a flat surface, and one or more communication ports 5 are formed in the bottom wall 4 to allow external drying gas to enter the drying chamber 6. The inverted U-shaped bridge 401 includes an intermediate horizontal section (or a horizontal plate) and parallel vertical sections (or vertical plates) respectively connected at both ends of the horizontal section, wherein the horizontal section is located at the communication port of the bottom wall 4 Above the 5, the ends of each vertical section are fixed to the bottom wall 4. The two ends can be fixed to the bottom wall 4 of the drying chamber 6 by means of, for example, welding, riveting or bolting. In FIG. 1, the vertical section of the inverted U-shaped bridge 401 is substantially perpendicular to the bottom wall 4 of the flat surface such that a side opening 402 is formed between the horizontal section of the bridge 401 and the bottom wall 4. Since the bridge 401 includes three straight sections, wherein the adjacent two sections are perpendicular to each other, two rectangular side openings 402 are formed between the bridge 401 and the bottom wall 4.

In the bottom-type dry sludge drying apparatus of a monomer form, since the communication port 5 is formed on the bottom wall 4 of the drying chamber 6, after the sludge to be dried is placed and accumulated on the bottom wall 4, A part of the sludge falls or leaks from the drying chamber 6 through the communication port 5 as the turning of the turning device 7 in the drying chamber and the drying gas entering the drying chamber 6 act. This not only interferes with the flow of dry gas into the drying chamber 6 but also adversely affects the control of the sludge drying process, and the provision of the bridge above the communication port 5 can greatly reduce sludge leakage. As shown, the flipping device 7 has a rotating shaft 701 and one or more flipping assemblies 702 fixed to the rotating shaft 701 for flipping the sludge, and are horizontally disposed in the drying chamber 6 and in the longitudinal direction G of the drying chamber. Parallel, wherein both ends of the rotating shaft 701 are disposed in the holes 201 on the opposite end walls of the drying chamber. A plurality of spaced apart communication ports 5 are arranged in the longitudinal direction G of the drying chamber in the bottom wall 4 of the drying chamber 6, and the shape of each of the communication ports 5 is rectangular. Here, the longitudinal direction of the communication port 5 is substantially perpendicular or perpendicular to the longitudinal direction G of the drying chamber. The longitudinal direction of the bridge 401 spanning over the communication port 5 is substantially parallel to the longitudinal direction of the communication port 5, and the length of the horizontal section of the bridge 401 is longer than the length of the communication port 5, and may be equal in length to each other. Thus, the bridge 401 can bridge the communication port 5 in the longitudinal direction of the communication port 5 like a bridge. The plurality of flipping assemblies 702 of the flipping device 7 are formed substantially in the same number and spacing distance as the plurality of communicating ports, and the length direction of the communicating port 5 is substantially perpendicular or perpendicular to the rotating shaft 701 of the flipping device 7, thus the bridge member The opening direction of the side opening formed between the 401 and the bottom wall 4 is substantially parallel to the rotation axis 701 of the flipping device 7. Each flipping assembly 702 of the flipping device 7 is arranged to be offset from the bridge member 401, i.e., the flipping assembly faces the area in front of the side opening 402 of the bridge member 401. In other words, the side edges of the front end or outer periphery of each flipping assembly 702 of the flipping device 7 are adjacent to the side opening 402 of the bridge 401 so that at least one side opening 402 can be scraped off as the flipping assembly 702 is rotated about the rotational axis 701. Near the sludge. Referring to Figures 4 and 5, one of the vanes or ratchets 703 of the flip assembly 702 of the flipping device 7 is in a position to sweep the sludge near the side opening 402 between the bridge member 401 and the bottom wall 4. The external drying gas needs to be turned into the side opening 402 after entering the communication port 5, that is, through the curved path from the communication port 5 to the side opening 402, to flow into the drying chamber 6, in other words, the turning component 702 of the flipping device 7 The length of one blade or ratchet 703 is configured such that the front end of the blade or ratchet 703 sweeps over the bottom wall 4 and the front region of the side opening 402.

Although the communication port 5 is shown in a rectangular shape, the shape of the communication port may be trapezoidal, rectangular, triangular, arched, circular, or the like, and the number of the communication port 5 and the bridge 401 need not be one-to-one correspondence. It is provided as needed, and the longitudinal direction of the communication port 5 is crossed or perpendicular to the rotational axis 701 of the flipping device 7. The horizontal section of the bridge 401 spanning over the communication port 5 along the length direction of the communication port may cover the communication port 5 in whole or in part in the width direction, that is, the bridge 401 may cover a part of the width of the communication port 5. However, it is necessary to scrape the sludge near the side opening 402 formed between the bridge 401 and the bottom wall 4 when the flipping assembly 702 of the flipping device 7 is rotated. The inverted U-shaped bridge member 401 shown in Figs. 4 and 5 spans the communication port 5 in the longitudinal direction of the communication port and forms two together with the bottom wall 4 in the width direction of the bridge member, that is, the side of the bridge member. Side openings 402. The opening directions of the two side openings 402 are parallel to the rotational axis 701 of the flipping device 7. Although only the flip assembly 702 is shown disposed adjacent one of the side openings 402, the flip assembly can also be disposed between the two bridges, wherein the width of the flip assembly 702 or the vanes or ratchets thereon slightly Less than the distance between the two bridge members 401 to sweep the sludge between the opposite side openings 402 of the two bridge members 401.

In another embodiment of the present invention, a baffle 403 may be provided in the width direction of the bridge 401, that is, on the side of the bridge to block one of the side openings 402 while leaving the other side opening 402, thereby allowing drying. The gas enters the drying chamber 6 in one direction. As shown in Fig. 6, a baffle 403 is disposed in the side opening 402 of the bridge member 401 to prevent dry gas from passing therethrough, so that the flipping assembly 702 of the flipping device 7 can only scrape the sludge near the other side opening 402. . This arrangement of the baffle 403 allows the drying gas to flow out of the side opening 402 into the drying chamber 6 in only one direction, and both prevents the drying gas from entering the drying chamber 6 from the opposite direction and prevents the sludge from leaking out of the drying chamber. .

Figures 7 and 7A illustrate yet another embodiment of the bridge of the present invention. Two

baffles

403a, 403b are disposed on both sides of the bridge member 401 to block the two side openings 402, and one of the baffles 403a completely blocks one side opening 402, and the other baffle 403b is formed to be open. Aperture 404 is allowed to pass therethrough through the drying gas. The baffle 403b with the opening 404 is provided to narrow the side opening to better block the leakage of sludge out of the drying chamber 6 through the curved path from the side opening 402 to the communication port 5.

Yet another embodiment of the bridge 401 of the present invention is illustrated in Figures 8, 8A and 8B. One of the side openings 402 is completely blocked by the baffle 403 at the side of the bridge 401, and a plurality of grids 405 are provided in the other side opening 402. The plurality of grid plates 405 are spaced apart from each other along the length direction of the bridge member 401, and each grid plate 405 is angled with respect to the opening direction of the side opening 402, that is, the longitudinal direction G of the casing, preferably 0°-85°. Angle, more preferably 30°-60° angle. Thus, a slit 404b is formed between two adjacent grids of the plurality of grids 405 at an angle to the opening direction of the side opening 402, so that sludge can be better prevented from passing through the slit 404b (or the side) The curved path of the opening 402) to the communication port 5 leaks out of the drying chamber 6.

Yet another embodiment of the bridge 401 of the present invention is illustrated in Figures 9 and 9A. Each vertical segment 4011 of the bridge 401 presents a trapezoid with a straight edge in the width direction, wherein the trapezoidal top edge 4012 is a narrower horizontal section of the bridge 401 that spans the communication port 5, and One side of the trapezoid is a fold line composed of two straight sides having a diagonal line segment 4013 and a vertical line segment 4014. Therefore, the baffle 403 in the width direction of the bridge, that is, the one side, is a curved plate corresponding to the fold line side of the vertical section 4011 of the bridge. The portion of the curved baffle adjacent the bottom wall 4 is a shorter vertical section, and the portion adjacent the horizontal section of the bridge 401 is an inclined section. In other words, the curved short baffle 403 is formed such that the vertical short side 4014 of the vertical section 4011 of the bridge 401 coincides with the beveled edge 4013, thereby retaining the straight side of the trapezoid of the vertical section 4011 of the bridge 401. Side opening 402 on the side. The provision of such a curved baffle facilitates the movement of the sludge from the side of the bridge with the baffle to the side of the remaining side opening under the action of the turning device 7, thereby not only preventing sludge Leakage also reduces sludge build-up due to baffle blockage.

Figure 10 shows a preferred embodiment of the bottom dry sludge drying apparatus of the present invention, and Figure 11 is a transverse cross-sectional view of the sludge drying apparatus of Figure 10, schematically showing a monomer form Sludge drying device. The bottom dry sludge drying device 1 comprises a casing, wherein a partitioning plate 4 is provided in the casing to separate the inner space of the casing from the two chambers as the first drying chamber 6a and the second drying chamber 6b . A communication port 5 for communicating the first drying chamber 6a and the second drying chamber 6b is formed on the partitioning plate 4 to enable the drying gas to enter the first drying chamber 6a from the second drying chamber 6b. As shown, although the first drying chamber 6a and the second drying chamber 6b are arranged one above the other, other arrangements are possible. The housing generally comprises a body 2, an upper cover (or cover) 3 and a bottom plate 4a, wherein the upper portion of the body 2, the upper cover 3 and the partition plate 4 constitute a first drying chamber 6a, and the lower portion of the body 2 is separated The plate 4 and the bottom plate 4a constitute a second drying chamber 6b. However, the housing may be constructed of a plurality of parts or a plurality of ways, for example, the upper portion of the body 2 is integrally formed with the partitioning plate 4, wherein the upper surface of the partitioning plate is used as the bottom of the first drying chamber 6a, And the lower portion of the body 2 is fixed to the partition plate to use the lower surface of the partition plate as the top of the second drying chamber 6b. Alternatively, the lower portion of the body 2 may be integrally formed with the partitioning plate 4, or the bottom plate 4a may be eliminated, the body 2 may be placed on the ground, or the like. The shape of the body 2 is rectangular, but may be square, polygonal, elliptical or other shapes.

As shown in the figure, on the upper cover 3 of the casing, a feed port 8 for allowing the sludge to be dried or dried to enter the first drying chamber and an exhaust gas or a drying gas for discharging the dried sludge are respectively provided. The exhaust port 10 is provided with a discharge port 9 for the dried sludge on the end wall of the upper portion of the body 2 in the vicinity of the partition plate 4 away from the feed port 8. In other embodiments, the feed port 8 and the exhaust port 10 for the first drying chamber may be disposed at any position on one of the body 2 and the upper cover 3 as needed, that is, the first drying chamber 6a. Any position in the upper part. Also, the discharge opening 9 may be provided at any position of the upper portion of the body 2 including the side wall and the circumferential wall of the end wall, that is, any position of the circumferential wall of the first drying chamber 6a.

A plurality of spaced apart rectangular communication ports 5 are formed on the partition plate 4 and are connected at each A bridge member 401 is provided above the mouth. However, the communication port 5 may have various shapes such as a trapezoid, a rectangle, a triangle, an arch, a circle, etc., and one or more communication ports may be provided. In other words, the communication port 5 has no shape and number restrictions and can be determined as needed. The bridge above the communication port can also be changed correspondingly based on the shape of the communication port. The plurality of communication ports 5 are arranged in groups along the longitudinal direction G of the casing, and the plurality of communication ports 5 in each group are spaced apart from each other by a certain distance. The longitudinal direction of each of the communication ports 5 intersects with the longitudinal direction G of the casing, preferably perpendicular to each other.

Figure 12 shows a preferred embodiment of a flipping device arranged in a first drying chamber, wherein two flipping

devices

7a, 7b for turning the sludge are arranged parallel to each other in the longitudinal direction G of the housing. Since the two

flipping devices

7a, 7b have the same or similar configuration, only one of the flipping devices such as the flipping device 7a will be described in detail. The turning device 7a has a rotating shaft 701a and a turning assembly 702a fixed to the rotating shaft 701a for turning the sludge. The flip assembly 702a includes four vanes or ratchets 703a, and each vane or ratchet 703a extends radially outward from the rotational axis 701a. Therefore, the flip assembly 702a that rotates together with the rotating shaft 7a is similar in contour to the blades of the propeller. However, the shape of the flipping member 702a is not limited thereto, and the flipping member 702a may be designed to resemble the shape of a gear. One or more flip assemblies 702a may be disposed on the rotating shaft 701a, and each flip assembly 702a may include one or more vanes or ratchets 703a. However, the length of the plurality of blades or ratchets 703a of each flipping member 702a extending from the rotating shaft 701a may be different from each other, and at least one of the plurality of flipping assemblies 702a may have longer length blades or ratchets Other flipping components may have shorter length blades or ratchets. Although the illustrated blade or ratchet is fixed to the rotating shaft 701a by welding, other fixing means such as bolting, riveting, etc. may be employed, for example, the blade or the ratchet may be connected or fixed to the collar, the bushing or the hub (not The upper collar is then mounted on the rotating shaft 701a. Both ends of the rotating shaft 701a may be mounted in one of the

holes

201a or 201b on the opposite end walls of the body 2 by bearings.

Although the drying gas (arrow as shown) enters the first drying chamber 6a from the second drying chamber 6b through the communication port 5 on the partitioning plate 4, and is discharged from the exhaust port 10 after interacting with the sludge, thereby The opportunity for the dry gas to contact with the sludge is increased, however, after the sludge to be dried is discharged from the feed port 8 to the first drying chamber 6a and stacked on the partitioning plate 4, with the turning of the

turning devices

7a, 7b The flipping of the

components

702a, 702b and the action of the drying gas, a part of the sludge may fall or leak from the first drying chamber 6a through the communication port 5 into the second drying chamber 6b. In order to reduce the leakage of the sludge, the bridge 401 is disposed above the communication port 5, In order to block the leakage of the sludge through the communication port to the second drying chamber 6b by the bridge member 401. Referring to Figures 10-12, the partitioning plate 4 between the first drying chamber 6a and the second drying chamber 6b is a curved plate, and may also be a plate having a concave upper surface. When viewed in a direction transverse to the longitudinal direction G of the housing, the shape of the partitioning plate 4 in the cross section is downwardly curved or has a concave upper surface, that is, a curved section of the depressed portion from the first drying chamber 6a protrudes downward toward the second drying chamber 6b, or the first drying chamber 6a has a concave bottom. Therefore, the partition plate is shown as a recessed area in the longitudinal direction G of the casing. As shown, the area of the curved partitioning plate 4 facing each of the two

flipping devices

7a, 7b is concave, preferably each recessed area corresponds to the flipping

assembly

702a or 702b and is concave The area can be circular. The bridge member disposed above the communication port may be a plate member including a flat plate, a curved plate, a herringbone plate, or the like. In addition, the bridge member 401 may be disposed on one or more of the communication ports 5, and the number of the communication ports and the bridge members need not be in one-to-one correspondence.

The bridge 401 is disposed to straddle the communication port 5 in the longitudinal direction of the communication port and is substantially parallel to the longitudinal direction of the communication port 5. The length of the bridge member 401 is longer than the length of the communication port 5, so that the bridge member 401 can be spanned over the communication port 5 in the longitudinal direction of the communication port 5 like a bridge, and the two ends thereof are respectively fixed to the communication port. On the partition plate 4 near the end edge. As described above, since the intermediate portion of the bridge 401 is located above the communication port 5, a side opening 402 is formed between the bridge 401 and the partitioning plate 4, and a side opening can be formed on one side of the bridge 401. 402 or a side opening 402 is formed on each side thereof. Although the bridge 401 above the communication port 5 is advantageous for reducing sludge from the first drying chamber 6a or leaking to the second drying chamber 6b, the sludge accumulated near the side opening also interferes with the drying gas from the second. The drying chamber 6b enters the first drying chamber 6a. To facilitate the flow of the drying gas, the blades or ratchets 703a, 703b of the

flip assembly

702a, 702b are designed to scrape sludge adjacent the side opening 402 of the bridge 401. The spacing of the flipping

members

702a, 702b of the flipping

devices

7a, 7b on the

rotating shafts

701a, 701b can be determined according to the distance between the plurality of communicating ports or the bridges in each row on the partitioning plate 4 to ensure rotation. When the shaft is rotated, the front end of the longer blade or ratchet 703a, 703b on each of the flipping

assemblies

702a, 702b or the side edge of the front end of the

scrapable members

704a, 704b mounted on the blade or ratchet 703a, 703b can be scraped In addition to the side opening 402 of the bridge 401. In addition, for the disk-shaped, gear-shaped flipping assembly, the outer periphery or the protruding portion of the top end or the side edge of the tooth can be used to flip the sludge. As shown, the two

flipping devices

7a, 7b are arranged such that The first flipping assembly 702a on one of the rotating shafts 701a and the second flipping assembly 702b on the second rotating shaft 701b are respectively spaced apart from the two rows of communication ports 5 The bridge 401 on or above corresponds to it. In order to allow the drying gas to smoothly enter the first drying chamber 6a from the second drying chamber 6b through the communication port 5, the length of the blades or ratchets 703a, 703b of the flipping

members

702a, 702b of the flipping

devices

7a, 7b can be made long enough so that When the flipping

assemblies

702a, 702b rotate with the

rotating shafts

701a, 701b, the side edges of the leading ends of the blades or ratchets can scrape the sludge near the side openings 402. In general, at least one of the plurality of flipping

assemblies

702a, 702b can have at least one blade or ratchet 703a, 703b whose front end can scrape the sludge. The number of flipping

members

702a, 702b does not have to correspond one-to-one with the number of the communication ports 5 or the bridge members 401 thereon.

In another embodiment, the flipping device 7 has a rotating shaft 701 and a flipping assembly 702 fixed to the rotating shaft, wherein the flipping assembly 702 is provided with blades or ratchets 703, and the front end of the vane or ratchet 703 can be used for scraping Remove sludge. A scrapable member is mounted on the blade or ratchet 703 of the two flipping assemblies 702, wherein the blades or ratchets on which the scraping members are mounted are of the same length as the other blades or ratchets, and the blades or ratchets are mounted The scraping member acts the same as the other blade or ratchet scrapable front end. In yet another embodiment, the blades or ratchets of the flip assembly 702 can be made to have different lengths and the scrapable components can be mounted on shorter blades or ratchets, such as their front ends, as desired.

13 and 13A are respectively a perspective view and a cross-sectional view showing the bridge member in the circled portion B of Fig. 10, wherein the communication port, the bridge member provided on the communication port, and the blade or the spine of the flipping assembly are sequentially shown. The scrapable front end of the tooth is in the vicinity of a side opening formed between the bridge and the divider. The communication port 5 is formed on a partition plate having a concave surface, and the bridge member 401 in the form of a flat plate is disposed above the communication port. Since the flipping member 702 fixed to the rotating shaft is disposed to correspond to the bridge member 401, the scraping front end of the blade or ratchet 703 of the flipping assembly 702 or the front end of the scraping member fixed to the blade or ratchet is provided. The side edge faces the side opening 402 of the bridge 401 so that the sludge near the side opening 402 of the bridge 401 is scraped off when the flip assembly 702 rotates, so that the dry gas that has entered the communication port 5 smoothly passes through the side. The opening 402 enters the first drying chamber 6a. In addition to the scraping action, the blades or ratchets of the flipping

assemblies

702a, 702b also function to shear, break and flip the sludge. In addition, the blade or ratchet of the flipping assembly with the scrapable front end or the blade or the ratchet with the scraping member fixed to the front end thereof may be located between the two bridge members 401 so that the front end of the blade or ratchet or A side edge of the front end of the scrapable member fixed to the blade or ratchet can sweep the side opening 402 of the opposite side of the two bridge members 401.

Figure 13B shows the bridge of Figure 13A in the longitudinal direction of the housing in the divider The upper position wherein the leading end of the blade or ratchet 703 of the flipping assembly is near the bottom of the drying chamber, and the distance of the tip of the blade or ratchet 703 from the dividing plate is substantially equal within the scraping range. It can be understood that when the rotating shaft of the turning device or the hole for mounting the rotating shaft is adjusted in the vertical direction of the housing, the distance r of the axis of the rotating shaft to the tip of the blade or ratchet of the flipping assembly will change, thus The distance from the tip of the blade or ratchet to the dividing plate can be determined by selecting the length of the blade or ratchet to determine the amount of sludge to be scraped. In other words, the size of the flipping device is selected such that the distance r from the axis of the rotating shaft to the tip of the longer blade or ratchet of the flipping assembly is smaller than the radius R of the concave arcuate region of the dividing plate of the curved surface. Since the

rotational axes

701a, 701b of the flipping

devices

7a, 7b are arranged parallel to the longitudinal direction G of the housing, the rotational axis intersects the longitudinal direction of the communication port 5 or the bridge member 401, preferably perpendicular to each other, and therefore, the side opening 402 The opening direction is substantially parallel to the axial direction of the rotating shaft or the longitudinal direction G of the housing. After flowing into the communication port 5, the drying gas needs to be turned through the side opening to reach the first drying chamber 6a. Similarly, the sludge also needs to pass through a curved path from the side opening 402 to the communication port 5 to leak from the first drying chamber 6a to the first The second drying chamber 6b, therefore, the amount of sludge leakage will be greatly reduced. The scraping of the sludge near the side opening 402 not only reduces the amount of sludge leakage but also accelerates the flow of the drying gas and improves the drying efficiency of the sludge.

As shown, in two flipping

devices

7a, 7b interlaced with each other, the blade or ratchet scraping front end of the first flipping assembly 702a on the first rotating shaft 701a is fixed to the blade or ratchet. The front end of the scrapable member is adjacent to the second rotational axis 701b and located between two adjacent second flipping assemblies 702b, and vice versa. This shortens the axial spacing between the first rotational axis 701a and the second rotational axis 701b, and also avoids interference between the first flipping assembly 702a and the second flipping component 702b. In another embodiment, two adjacent flipping assemblies on the same rotating shaft may form a group, and each set of flipping assembly 702a on the first rotating shaft 701a and each set of flipping assemblies 702b on the second rotating shaft 701b Arranged in a staggered manner such that a set of flipping assemblies 702a on the first axis of rotation 701a are located between adjacent sets of flipping assemblies 702b on the second axis of rotation 701b. In still another embodiment, an adjacent three flipping assemblies on the same rotating shaft may be grouped, and each set of flipping assemblies on each rotating shaft is staggered with each set of flipping assemblies on the other rotating shaft. . Regardless of the arrangement of the flipping assembly on the rotating shaft, it should be ensured that most of the flipping assembly corresponds to the plurality of communicating ports 5 or the bridges 401 thereon so as to flip the blades or ratchets 703a, 703b of the

components

702a, 702b. The front end of the scrapable front end or the

scrapable members

704a, 704b fixed to the blade or ratchet can scrape the sludge near the side opening 402 of the bridge 401 for drying The gas smoothly flows into the first drying chamber 6a. In summary, the position of the communication port or bridge on the divider plate is associated with the position of the flip assembly on the axis of rotation.

One end of the

rotating shafts

701a and 701b of the first flipping device 7a and the second flipping device 7b may be respectively provided with a power input member connected to a transmission (not shown). The transmission is driven by an external power unit, and the transmission sequentially drives the

rotation shafts

701a and 701b to rotate, so that power input members such as gears or pulleys 18a on the

rotation shafts

701a and 701b drive one of the

rotation shafts

701a and 701b, thereby making the other The rotating shaft rotates. The first rotating shaft 701a and the second rotating shaft 701b may be rotated in opposite directions with respect to each other or may be rotated together in the same direction.

The shape of the side opening 402 depends on the shape of the bridge 401 and the concave upper surface of the partition plate. Preferably, the shape of the cross section of the recessed portion of the partitioning plate 4 and the scraping tip of the blade or ratchet

teeth

703a, 703b of the flipping

assembly

702a, 702b of each of the flipping means 7a, 7b are fixed to the blade or ratchet The rotational trajectories of the top ends of the upper

scrapable members

704a, 704b match. For example, when the bridge member 401 is a flat plate and the concave portion of the partitioning plate 4 is a circular arc shape, the side opening 402 has a crescent shape. Preferably, the radius R of the curved partition plate facing the concave arcuate region of the flipping device is slightly larger than the distance r from the axis of the rotating shaft to the tip end of the flipping assembly.

Referring to Figures 10 and 11, the second drying chamber 6b includes an air inlet 15 disposed on one side of the lower portion of the body 2, that is, the air inlet 15 is located on the side wall or bottom of the second drying chamber 6b for use in The drying gas of the sludge to be dried enters the second drying chamber 6b, and the air inlet may be one or more. Despite the bridge member 401 above the communication port 5 of the partitioning plate 4 and the scraping front end of the blade or ratchet of the flipping

assembly

702a, 702b or the front end of the

scrapable members

704a, 704b fixed to the blade or ratchet The scraping of the sludge near the side opening 402 of the bridge 401 helps to reduce the sludge in the first drying chamber 6a from falling into the second drying chamber 6b, but there may still be some sludge passing through the side opening 402. The curved path to the communication port 5 leaks into the second drying chamber 6b. In order to clean out the sludge leaking into the second drying chamber 6b, a cleaning port 15a is provided at one end of the lower portion of the body 2, that is, a cleaning port 15a is provided on the end wall of the second drying chamber 6b near the bottom thereof. Among them, the cleaning port 15a is for discharging the sludge deposited in the second drying chamber 6b. In addition, the cleaning opening 15a may be provided on the circumferential wall or the bottom including the side walls and the end walls. A discharge device 25 is provided in the second drying chamber 6b at a position close to the bottom plate 4a. The discharge device 25 may be a screw conveyor, but it may also be a belt conveyor, a net chain conveyor, a gas conveyor, or the like. The auger has a rotating shaft 25a and is fixed in rotation The screw 25b of the shaft 25a, wherein the rotating shaft 25a is supported on the end wall of the lower portion of the body 2, and one end thereof is provided with a power input member 25c and the other end is extended to the cleaning port 15a. When the transmission drives the rotating shaft 25a to rotate, the screw 25b conveys the sludge to the cleaning port 15a at one end of the second drying chamber 6b and discharges the casing. The second drying chamber 6b is substantially funnel-shaped in the lateral direction, and the side walls thereof, that is, the side walls of the lower portion of the body 2 are gradually narrowed toward the bottom plate 4a, and the shape at the narrowed portion, that is, the bottom plate 4a is curved or half. The radius of the circular, curved or semi-circular shape is slightly larger than the radius of the rotational trajectory of the outer periphery of the spiral 25b, such that a longitudinal passage of an arcuate cross section is formed at the bottom of the second drying chamber 6b. The sludge leaking from the first drying chamber 6a through the side opening 402 may be collected into the longitudinal passage of the arcuate section so as to be conveniently discharged out of the casing by a screw conveyor provided in the longitudinal passage. The sludge leaking into the second drying chamber 6b may be dried or secondarily dried by the drying gas entering the second drying chamber 6b to further reduce the moisture content of the sludge. In another embodiment, a discharge opening and a detachable plate that blocks the discharge opening may be formed on the side wall of the lower portion of the body 2. Once the sludge in the second drying chamber 6b is excessive, the detachable plate can be removed to remove the sludge, thereby ensuring the smooth flow of the drying gas in the second drying chamber 6b. In order to maintain the relative sealing of the second drying chamber 6b, a movable shutter 29 may be provided at the cleaning port 15a so that the drying gas does not leak, and the movable shutter 29 is opened when the sludge is discharged.

Referring to Fig. 11, the sludge drying apparatus 1 further includes an air blowing device 12 not shown in Fig. 10, wherein the air blowing device 12 communicates with the second drying chamber 6b via a duct 12a and a gas inlet 15 to discharge dry gas. It is blown into the second drying chamber 6b. Also, the sludge drying device 1 may further include an air guiding device 13, wherein the air guiding device 13 communicates with the first drying chamber 6a via the duct 13a and the exhaust port 10. The drying gas delivered into the second drying chamber 6b may be a drying medium such as a hot gas, a chemical-containing gas, hot air, a normal temperature gas or a freezing gas, or a specially prepared drying medium. The air blowing means 12 can be used to increase the speed at which the drying gas flows into the second drying chamber 6b, and the air guiding means 13 can accelerate the outflow of the exhaust gas from the first drying chamber 6a. Typically, the air blowing device may be a blower or a fan, and the air guiding device may be an induced draft fan. Alternatively, the air blowing device 12 may be replaced with a supercharging device to deliver the drying gas to the second drying chamber 6b at a certain pressure, so that the drying gas is accelerated to flow into the first drying chamber 6a. It is also possible to replace the air guiding device 13 with a pressure reducing device to speed up the flow of the exhaust gas, thereby improving the sludge drying efficiency.

In order to accelerate the drying of the sludge, the drying gas delivered into the second drying chamber 6b may be heated, and a heating device (not shown) may be separately disposed upstream of the air blowing device. Or downstream, it can also be integrated with the blower. The heated drying gas is sent to the second drying chamber 6b by the air blowing device or the charging device to re-dry the sludge therein. While the heated drying gas is subjected to secondary drying of the sludge dropped or leaked into the second drying chamber 6b, a part of the heat may be transferred to the laying body by the body 2 and the partitioning plate 4 made of a metal material. The sludge on the partition plate 4 serves to assist the drying of the sludge in the first drying chamber 6a.

Fig. 14 shows a further embodiment of the bridge member, which is similar to the bridge member of Fig. 6, i.e., one of the side openings 402 is blocked by the baffle 403 in the width direction of the bridge member 401, and is retained only The other side opening 402 allows the drying gas to enter the first drying chamber 6a in one direction. The side dam 403 is disposed in the side opening 402 along the length of the bridge 401 to prevent dry gas from passing therethrough, so that the tumbling assembly 702 of the flipping device 7 can only scrape the sludge near the other side opening 402. This arrangement of the baffle 403 is such that the drying gas flows out of the side opening 402 into the first drying chamber 6a in only one direction, preventing the drying gas from entering the first drying chamber from the opposite direction, and also reducing sludge leakage.

A further embodiment of the bridge shown in Figures 15 and 15A is similar to the bridge of Figures 7 and 7A, i.e., two side openings are respectively opened by two

baffles

403a, 403b in the width direction of the bridge 401 The block 402 is blocked, and an opening 404 smaller than the side opening 402 is formed in one of the baffles 403b.

A further embodiment of the bridge shown in Figures 16, 16A and 16B is similar to the bridge of Figures 7, 7A and 8, 8A, 8B. A first baffle 403a is provided in the width direction of the bridge 401, that is, in the opening direction of the side opening to block one of the side openings 402 of the bridge 401, and the second or another baffle 403b is disposed at The other side opening 402. The second baffle 403b is provided with an opening 404a, wherein the opening 404a is crescent-shaped, and may be other shapes such as a rectangle, an ellipse or the like. A plurality of grid plates 405 are vertically disposed at the opening 404a, wherein each of the plurality of grid plates 405 is disposed at an angle with respect to the longitudinal direction G of the housing. Thus, a slit 404b is formed between each two adjacent grid plates at an angle a to the opening direction of the opening 404a, that is, the longitudinal direction G of the casing, thereby entering the drying gas from the plurality of slits 404b. The flow direction has an angle α with the flow direction through the side opening 402 or the opening 404a, and the angle is preferably an angle of 0°-85°, more preferably an angle of 30°-60°, so that the sludge can be prevented from the slit 404b to the communication port. Leakage of the curved path of 5 into the second drying chamber 6b also allows the drying gas to smoothly flow into the first drying chamber 6a. Alternatively, a plurality of small through hole arrays may be formed on the

baffle

403a or 403b to avoid leakage of sludge.

A further embodiment of the bridge of the present invention is shown in Figs. 17 and 17A. The bridge 401 is a downwardly curved plate in the longitudinal direction and is bent to a greater extent than the bottom wall 4 near the communication port 5. The curvature of the concave arc is small. Each of the bridge members 401 is disposed above the communication port 5 in an inclined manner. As seen in FIG. 17A, the left side or the front side of the bridge member 401 is higher than the right side or the rear side thereof in the width direction. And the left side or front side portion of the bridge member 401 covers a part of the communication port 5 on the left side or the front side, and the right side or rear side portion thereof covers a part of the communication port on the right side or the rear side. In other words, each of the bridge members 401 is disposed obliquely along the longitudinal direction of the drying chamber and is located above the two adjacent communication ports 5, wherein the upper front side extends above the front communication port 5 And the lower rear side extends above the rear communication port 5. A plurality of bridge members 401 are disposed along the longitudinal direction of the drying chamber, and adjacent two bridge members 401 are disposed such that the higher front side edges of the latter bridge members are located on the lower rear side of the front bridge member Above the sides, such that a portion of two adjacent bridges are placed one on top of the other to form a curved slit opening in the area where they overlap, and the curved slit forms an acute angle with the longitudinal direction of the drying chamber, for example The angle can be between 20° and 60°.

As described above, the bridges provided on the bottom wall of the curved surface are not limited to the flat plates and may be plates of various shapes. For example, the bridge 401 on the bottom wall of the curved surface may also have a combination of a vertical segment and a curved segment as previously described, a combination of two vertical segments and a curved segment or two curved segments, or a Such as arched curved plates. For example, in the length direction, the bridge member may have two short horizontal straight segments at both ends, and an arched or concave curved segment in the middle, or a herringbone shaped bridge with two straight segments. The 401 can also be placed across the communication port 5. Obviously, regardless of the shape of the bridge member and being disposed on the flat or curved bottom wall 4, the opening direction of the side opening 402 or the slit 404 formed between the bridge member 401 and the bottom wall 4 should be ensured and dried. The longitudinal direction of the chamber 6 is substantially parallel or forms an acute angle so that the front end of the flipping assembly 702 of the flipping device within the drying chamber can scrape the sludge near the side opening 402 or slit 404. In addition, the degree of curvature of the bottom curved wall 4 of the curved surface of the first drying chamber facing the concave curved portion of the flipping device is close to the rotational trajectory of the tip end of the flipping assembly 702 of the flipping device 7, that is, the bottom wall surface of the curved surface The radius of curvature of the region of the flipping assembly may be slightly larger than the radius of the rotational trajectory of the tip of the flipping assembly. In this way, it not only facilitates the setting of the bridge member, but also facilitates the collection of the turned-over sludge, thereby promoting the drying of the sludge.

Although a vertical baffle 403 is provided on one side of the bridge 401 of the present invention to block one of the side openings 402, see FIGS. 6 and 14, the baffle 403 may also be a sloping plate. Or curved plates. For example, a vertical straight section 4011 of the both ends of the bridge 401 shown in FIG. 9A which is trapezoidal in the lateral direction may be canceled near a short straight side 4014 of the bottom wall 4, and the level of the adjacent bridge 401 may be adjacent. The inclined edge 4013 of the segment extends to the bottom wall 4, or the curved straight edge replaces the short straight edge and the inclined edge of the vertical segment of the trapezoid. Thus, the baffle 403 can be replaced with an inclined plate or a curved plate that extends from the horizontal section of the bridge 401 to the bottom wall 4. Such a flipping device may be provided in the drying chamber 6, wherein the flipping device both scrapes the sludge in the vicinity of the side opening 402 and pushes the sludge to move in the longitudinal direction of the drying chamber, and the baffle 403 is directed toward the direction in which the sludge is pushed. The opposite side opening 402 is sealed. In order to discharge the dried sludge from the discharge port 9 provided at one end of the drying chamber 6, the turning device can push the sludge toward the discharge port 9 while scraping the sludge near the side opening, while the sludge is During the pushing process, the baffle 403 can prevent the sludge from falling or leaking out of the drying chamber 6 from the blocked side opening 402 to the curved path of the communication port 5. In addition, it should be noted that the bridge described in the foregoing can be applied to any partition plate suitable for it, for example, the separation of the concave surface shown in Figs. 10 and 11 described above. The plates are replaced with flat dividing plates, and all the bridges adapted to the flat dividing plates can be used.

As described above, the arrangement of the two drying chambers in which the first drying chamber 6a is located above the second drying chamber 6b facilitates the use of the bridge member 401 to prevent the sludge on the bottom wall 4 of the first drying chamber 6a from passing through the communication port 5 Dropped or leaked into the second drying chamber 6b. However, the bridge of the present invention is not limited to a bottom-drying sludge drying apparatus using a monomer form of such an arrangement, and for example, the bridge of the present invention may also be used in the form of a single body having only one drying chamber. Bottom dry sludge drying unit. In the sludge drying device, the drying chamber is raised a certain distance away from the ground, so that the external drying gas in the space between the bottom wall of the drying chamber and the ground can enter the drying chamber through the communication port, or the pipeline The connection port of the bottom wall is connected from the outside to convey the dry gas to the corresponding communication port through the pipe. In this way, a bridge member can be disposed above the communication port of the bottom wall of the drying chamber, so that the sludge laid on the bottom wall needs to pass through a curved path from the side opening to the communication port to leak out of the drying chamber, and further, the pole The earth reduces the leakage of sludge and purifies the working environment.

In the present application, although a plurality of preferred embodiments are listed, the present invention is not limited to the contents mentioned in the specification, and those skilled in the art can fully dry the bottom dry sludge of the present invention by the above design ideas of the present invention. Variations and modifications are made to the various components or devices in the device, and such variations or modifications are within the scope of the inventive concept.

Claims

A bridge for a bottom aeration sludge drying device, wherein the bottom of the drying chamber of the sludge drying device has a flat or concave surface, and in the flat or concave Forming at least one communication port communicating with the outside, the length direction of the at least one communication port intersecting the longitudinal direction of the drying chamber;

The bridge member includes an arch member or a plate member and spans the at least one communication port in a length direction of the communication port, and both ends of the bridge member are fixedly coupled to the at least one communication port The bottom portion near the both end sides, wherein the bridge member covers the at least one communication port in whole or in part in the width direction to form at least one side opening between the bridge member and the bottom portion ;

At least one curved path from the at least one communication port to the at least one side opening to allow dry gas to pass from outside into the drying chamber;

Positioning the bridge member corresponding to at least one flipping device disposed in the drying chamber for turning the sludge, wherein the at least one turning device includes a rotating shaft and at least one flipping fixed to the rotating shaft An assembly, and the flipping device is configured to scrape the sludge near the at least one side opening when a side edge of the front end of the at least one flipping assembly rotates when the rotating shaft rotates.
The bridge of claim 1 wherein said arch comprises at least two portions, wherein a portion of said at least two portions is a linear segment and said linear segment is in communication with said at least one The bottom near the mouth is placed at an angle.
The bridge according to claim 1 or 2, wherein the arch has a linear segment at each of its ends, wherein the two linear segments are parallel to each other and adjacent to the at least one communication port The bottom of the bottom is set at an angle.
A bridge according to any one of claims 1 to 3, wherein the plate is fixed on the concave surface of the bottom and above the at least one communication port.
The bridge member according to any one of claims 1 to 4, wherein the plate member is a flat plate, and the flat plate is fixed on the concave surface of the bottom portion and located at the at least one Above the communication port, wherein the concave surface is an arcuate surface.
The bridge member according to any one of claims 1 to 5, wherein two side openings are formed between the bridge member and the bottom portion, and one of the side openings is provided with a baffle plate. It is used to block the drying gas from passing into the drying chamber.
The bridge according to any one of claims 1 to 6, wherein the other side opening between the bridge and the bottom is provided with a baffle, wherein the baffle is formed at least An opening to allow dry gas to pass therethrough into the drying chamber.
The bridge according to any one of claims 1 to 7, wherein the other side opening between the bridge and the bottom is provided with a plurality of grids, wherein the plurality of The grid plates are vertically disposed at intervals along the other side opening, and each grid plate is at an angle to an opening direction of the other side opening so as to be adjacent to two of the plurality of grid plates A slit is formed between the grid plates at an angle to the opening direction of the other side opening.
The bridge according to any one of claims 1 to 8, wherein a plurality of grids are provided along the at least one opening, wherein the plurality of grids are along the at least one opening Vertically disposed at an interval, and each grid is at an angle to an opening direction of the at least one opening to form between the adjacent two of the plurality of grids A slit having an opening angle of at least one of the openings.
The bridge according to any one of claims 1 to 9, wherein the linear segment is disposed perpendicular to the bottom portion near the at least one communication port.
A bridge according to any one of claims 1 to 10, wherein the plate member is a curved plate in the longitudinal direction, wherein the curved plate is angled relative to the bottom portion An obliquely disposed above the at least one communication port, and a higher side of the curved plate in a width direction covers a portion of a front communication port of the adjacent two communication ports, and a lower portion thereof The side covers a part of the rear communication port, and the sides of the adjacent two curved plates of the plurality of curved plates overlap each other, wherein the higher side of the latter curved plate is located in the front curved plate Above the lower sides, a slit is formed between the overlapping sides of the two curved plates at an angle to the longitudinal direction of the drying chamber.
A bridge according to any one of the preceding claims, wherein the flipping assembly of the sludge flipping device has at least one blade or ratchet extending radially outward from the axis of rotation, wherein The tumbling device is disposed such that a front end of the at least one blade or ratchet or a scraping member mounted at the front end scrapes sludge near the at least one side opening.
A sludge drying apparatus having the bridge member according to any one of the preceding claims, wherein the sludge drying device comprises:

a housing in which a partition plate is provided to space the inside of the housing Divided into a first drying chamber and a second drying chamber;

a feed port for the sludge to be dried disposed at an upper portion of the first drying chamber, and an exhaust port for discharging dry gas after drying the sludge, and a circumferential wall disposed on the first drying chamber a discharge port for the dried sludge;

At least one air inlet for drying gas to be dried sludge on a side wall of the second drying chamber;

At least one sludge turning device disposed in the first drying chamber, wherein the at least one sludge turning device includes a rotating shaft and a plurality of flipping assemblies fixed on the rotating shaft;

a plurality of communication ports formed in the partition plate, wherein the plurality of communication ports are arranged at intervals in a longitudinal direction of the first drying chamber, and a bridge member is disposed above the at least one communication port, Forming at least one side opening between the bridge and the partitioning plate;

The at least one sludge turning device is configured to respectively correspond to the bridge members above the plurality of communication ports, so that each of the flipping components can scrape the at least one while flipping the sludge Sludge near the side opening to allow the drying gas to enter the first drying chamber from the second drying chamber.
The sludge drying apparatus according to claim 13, wherein each of said plurality of flipping assemblies of said at least one sludge turning device has at least one blade extending radially outward from said rotating shaft Or a ratchet, wherein the front end of the at least one blade or ratchet can scrape or partially scrape the sludge near the at least one side opening.
The sludge drying apparatus according to claim 13 or 14, wherein said at least one side opening between said bridge member and said bottom portion disposed above each of said plurality of communication ports The opening direction is at an angle to the longitudinal direction of the housing.