WO2016110211A1

WO2016110211A1 - Bottom-drying sludge drying device and method

Info

Publication number: WO2016110211A1
Application number: PCT/CN2015/099788
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: 2015-12-30
Publication date: 2016-07-14
Also published as: TW201641445A; CN105819659A; HK1222638A1; CN115557664A; HK1222639A1; CN105819659B

Abstract

A bottom-drying sludge drying device (1), comprising a casing; the casing is provided with a curved partition plate (4) therein to divide the casing into a first drying chamber (6a) and a second drying chamber (6b); a communication opening (5) is formed on the curved partition plate (4); a bridge piece (401) is provided above the communication opening (5), and a side opening (402) is formed between the bridge piece (401) and the curved partition plate (4); a feeding port (8) and an air outlet (10) are provided at an upper portion of the first drying chamber (6a); a discharging port (9) is provided on a circumferential wall of the first drying chamber (6a); an air inlet (15) is provided on a side wall of the second drying chamber (6b); a sludge stirring device (7a, 7b) is provided in the first drying chamber (6a), and comprises a rotating shaft (701a, 701b) and a stirring assembly (702a, 702b) fixed on the rotating shaft (701a, 701b); and a returning device conveys sludge in the second drying chamber (6b) to the first drying chamber (6a). Also provided is a method for drying the sludge by using the sludge drying device (1).

Description

Bottom drying sludge drying device and method

Technical field

The invention relates to the field of sludge drying, and generally relates to a sludge drying device, in particular to a bottom drying sludge drying device in a monomer form and sludge using the sludge drying device Dry method.

Background technique

The sewage treatment plant will produce a large amount of sludge in the sewage treatment process. In order to treat the sludge, the sewage treatment plant usually uses the method of concentration or dehydration to reduce the moisture content of the sludge from more than 90% to 60-80%, and then it will be treated. The sludge is landfilled, solidified or dried. The landfill is easy to ferment the sludge and cause secondary pollution. However, the existing curing or drying equipment has low efficiency and large energy consumption, and the reduction effect is poor, and it is difficult to carry out subsequent treatment.

Chinese invention patent CN101186422A proposes a closed multi-chamber fluidized bed sludge drying method. The fluidized bed used in this method is not only energy-intensive but also inefficient, and it is difficult to achieve continuous and large-scale sludge drying treatment.

The authorized Chinese utility model patent CN201000261Y submitted by the applicant proposes a sludge low temperature drying device. Although such a drying device can achieve a certain amount of sludge drying, it takes a long time and consumes energy and does not achieve the desired purpose of improving drying efficiency.

The Chinese utility model patent CN203319838U proposes a sludge solidification treatment mixer. This mixer reduces the moisture content of the sludge by blending the dry powder into the sludge, which not only increases the amount of sludge, but also causes the solidified sludge to be reused.

The Chinese Patent Application No. 201510006479.4 proposes a bottom drying type sludge drying device in which the drying gas passes through the communication port on the partition plate along with the continuous turning of the sludge in the first drying chamber. The sludge stacked on the partition plate is dried from the second drying chamber into the first drying chamber. However, in the sludge drying process, the sludge blocking communication port often occurs, and the dry gas is difficult to smoothly enter the first drying chamber through the communication port, so that the sludge drying process progresses slowly.

To this end, there is a need for an improved bottom drying type of drying apparatus and method to increase the drying efficiency of the sludge.

Summary of the invention

In order to overcome the deficiencies in the prior art, the present invention proposes a bottom dry sludge drying device in the form of a monomer. In the sludge drying device of the present invention, the sludge is continuously contacted with the drying gas by continuous turning, shearing and crushing of the sludge through the turning device in the first drying chamber, thereby solving the problem occurring during the sludge drying process. The problem of uneven external drying.

In the sludge drying apparatus of the present invention, a communication port is formed on a partition plate for partitioning the first drying chamber and the second drying chamber, and a side between the bridge member and the partition plate disposed above the communication port is formed Opening. The drying gas enters the first drying chamber from the second drying chamber through a curved path from the communication port to the side opening to dry the sludge from the bottom, and the arrangement of the bridge greatly reduces the sludge from the first drying Leakage of the chamber to the second drying chamber.

In the sludge drying device of the present invention, the cutting, crushing and turning of the sludge with the turning assembly of the turning device, and the scraping front end of the blade or ratchet of the flipping assembly or fixing to the blade or the ratchet The front end of the scrapable member scrapes off the sludge near the side opening, so that the flow of the drying gas from the second drying chamber to the first drying chamber is smoother, and the granularity of the sludge constantly changes, so that the sludge is loose. Increased sex and fluidity, which helps to accelerate the drying of sludge by dry gas.

In the sludge drying apparatus of the present invention, not only the speed at which the drying gas flows into the drying chamber but also the flow rate of the drying gas flowing out of the drying chamber can be increased by the arrangement of the air blowing device, the air guiding device or/and the heating device. It promotes the contact of dry gas with sludge and improves drying efficiency.

In the sludge drying device of the present invention, the side wall of the second drying chamber is narrowed obliquely toward the bottom by the partition plate and forms a curved passage at the bottom to facilitate collecting sludge leaking into the second drying chamber, and is disposed at The discharging device in the second drying chamber can move the secondary dried sludge in the second drying chamber to the returning device, and the returning device transports the sludge to the first drying chamber and the sewage to be dried through the returning port Mud mixing allows the use of heat from the dried sludge to increase sludge drying efficiency and reduce energy consumption.

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 apparatus and method of the present invention utilizes a flipping device provided in a first drying chamber The flipping assembly 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 scraping side opening of the scrapable component fixed to the blade or ratchet The nearby sludge increases the frequency of contact between the drying gas and the sludge and accelerates the drying of the sludge. The sludge drying device and method of the invention can solve the problem that the sludge is strong in viscosity, easy to agglomerate and difficult to be broken, not only significantly removes the moisture in the sludge, but also transforms the granularity of the sludge into a powdery shape, thereby improving The drying efficiency of the sludge also reduces energy consumption.

The present invention provides a bottom drying type sludge drying apparatus, the sludge drying apparatus comprising a casing, wherein a curved partition plate is disposed in the casing to divide a space in the casing into a first drying chamber and a second drying chamber; the curved partition plate has at least one concave portion in the first drying chamber, wherein a plurality of communication ports are formed in the at least one concave portion, and at least a bridge member is disposed above a communication port, wherein at least one side opening is formed between the bridge member and the curved partition plate, and a return hole disposed on the partition plate of the curved surface; a feed port for the sludge to be dried at the upper portion of the first drying chamber, and an exhaust port for drying gas after drying the sludge, and a circumferential wall provided on the first drying chamber a discharge port of the dried sludge; at least one air inlet for drying gas of the sludge to be dried disposed on a side wall of the second drying chamber; at least one disposed in the first drying chamber a sludge turning device, wherein the at least one dirt The flipping device includes a rotating shaft and at least one flipping assembly fixed to the rotating shaft, and corresponding to the at least one recessed portion, such that each of the at least one flipping assembly of the at least one sludge turning device a flipping assembly for scraping sludge adjacent to the at least one side opening; and a returning device, wherein the returning device is disposed within the return hole, wherein one end of the returning device is located The first drying chamber has the other end located in the second drying chamber to deliver the sludge in the second drying chamber to the first drying chamber.

According to the above aspect, it further comprises a cleaning port for cleaning the sludge, wherein the cleaning opening may be provided on the circumferential wall or the bottom of the second drying chamber.

According to each of the above aspects, the plurality of communication ports are formed at a lower interval of the concave portion of the partition plate of the curved surface at a certain interval.

According to each of the above aspects, the bridge member may be a plate member, wherein the plate member includes a curved plate and a flat plate.

According to each of the above aspects, the at least one side opening includes two side openings, one of the side openings is provided with a shielding baffle for blocking the drying gas from entering the drying chamber, and the other side opening is provided with a plurality of grids .

According to each of the above aspects, each of the plurality of grids is angled with respect to a longitudinal direction of the housing.

According to the various aspects described above, each of the plurality of flipping assemblies has one or more blades or ratchets extending radially outward from the axis of rotation, and the one or more blades or ratchets The side edges of the front end may scrape or partially scrape the sludge near the at least one side opening.

According to the above various aspects, each of the plurality of flipping assemblies has at least one blade or ratchet extending radially outward from the rotating shaft, wherein the at least one blade or ratchet is mounted The side edges of the front end of the scrapable member may scrape or partially scrape the sludge near the at least one side opening.

According to each of the above aspects, the opening direction of the side opening is at an angle to the longitudinal direction of the housing.

According to each of the above aspects, at least one curved path for drying the gas exists between the at least one communication port and the side opening.

According to each of the above aspects, the returning device is a screw conveyor, and the screw conveyor has a rotating shaft and a spiral, wherein the outer diameter of the spiral is slightly smaller than the diameter of the return hole.

According to each of the above aspects, the concave portion of the curved partition plate has a circular arc shape in a longitudinal direction transverse to the casing.

According to each of the above aspects, the side wall of the second drying chamber is narrowed obliquely from the partition plate of the curved surface toward the bottom thereof to form a longitudinal passage having an arcuate upper cross section at the bottom.

According to the above various aspects, a discharge device is provided in the longitudinal passage of the bottom of the second drying chamber, wherein the discharge device delivers sludge to a cleaning port provided at one end of the longitudinal passage.

According to each of the above aspects, it further includes an air blowing device, wherein the air blowing device is in communication with the second drying chamber through the at least one gas inlet.

According to each of the above aspects, it further includes a heating device for heating the drying gas, wherein the heating device is located upstream or downstream of the air blowing device.

According to the above various aspects, it further includes an air guiding device, wherein the air guiding device communicates with the first drying chamber through the exhaust port.

According to the above various aspects, the at least one sludge turning device includes two sludge turning devices, wherein each of the plurality of flipping assemblies is at least one of the blades or the front of the ratchet a side edge of the front end of the scrapable member mounted on the at least one blade or the ratchet scrapes the sludge near the side opening, wherein one of the two sludge turning devices The plurality of flipping assemblies and the plurality of flipping assemblies of the other are staggered with each other.

The present invention provides a method of drying sludge using the sludge drying apparatus according to any one of the above aspects, the method comprising the steps of: passing sludge through a feed port for sludge to be dried Feeding into the first drying chamber; rotating a plurality of flipping assemblies of at least one sludge turning device disposed in the first drying chamber to shear, crush and flip the sludge so that at least one blade on each flipping assembly or a side edge of the front end of the ratchet or a front end of the scrapable member mounted on the blade or the ratchet scrapes off the sludge near the at least one side opening, wherein the at least one side opening is separated by the first drying chamber and a bridge disposed above at least one of the plurality of communication ports formed on the partition plate of the curved surface of the second drying chamber is defined together with the partition plate; allowing dry gas to enter the through the at least one air inlet a second drying chamber, and entering the first drying chamber through a curved path from the at least one communication port to the side opening; the tail gas after drying the sludge and the dried sludge passing through the first drying chamber respectively exhaust And the discharge port; and the sludge is conveyed from the second drying chamber to the drying chamber through the first orifice material returning means returning through the partition plate.

According to each of the above aspects, the method further includes the step of blowing the drying gas: the drying gas is blown by the air blowing means to allow the drying gas to enter the second drying chamber through the at least one air inlet.

According to each of the above aspects, it further comprises the step of heating the drying gas: conveying the drying gas to the heating device, wherein the heating device heats the drying gas entering or exiting the air blowing device.

According to each of the above aspects, the method further includes the step of extracting the exhaust gas: the exhaust gas after the dried sludge is taken out of the first drying chamber from the exhaust port by an air introducing device.

According to each of the above schemes, it also includes the steps of discharging sludge:

The sludge is disposed along the longitudinal passage of the bottom of the second drying chamber from a discharge port disposed at one end of the second drying chamber by a discharge device disposed in the second drying chamber.

The present invention also provides a bottom drying type sludge drying device, the sludge drying device comprising a casing, wherein a curved partition plate is disposed in the casing to separate a space inside the casing Forming a first drying chamber and a second drying chamber; the curved dividing plate has at least one concave portion in the first drying chamber, wherein a plurality of the concave portions are formed in the at least one concave portion a communication port, and a bridge member is disposed above the at least one communication port, wherein at least one side opening is formed between the bridge member and the curved partition plate; and is disposed at an upper portion of the first drying chamber a feed port for the sludge to be dried and an exhaust port for the dry gas after drying the sludge, and a discharge port for the dried sludge disposed on the circumferential wall of the first drying chamber And a return port for conveying the dried sludge; at least one air inlet for drying gas for the sludge to be dried disposed on the bottom wall or the bottom of the second drying chamber and for discharging after drying a cleaning port of the sludge; 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, And corresponding to the at least one concave portion, so that each of the plurality of flipping assemblies of the at least one sludge turning device can scrape the sludge near the at least one side opening; Material device, wherein The material device is disposed in a return chamber of the return housing outside the housing, and one end of the return chamber communicates with the cleaning port, and the other end thereof communicates with the return port to The dried sludge is transported from the second drying chamber to the first drying chamber.

According to the above aspect, the plurality of communication ports are formed at a lower interval of the concave portion of the partition plate of the curved surface at a certain interval.

According to the above various aspects, each of the plurality of flipping assemblies of the at least one sludge turning device has one or more blades or ratchets extending radially outward from the rotating shaft, wherein the one or The side edges of the front ends of the plurality of blades or ratchets may scrape or partially scrape the sludge near the at least one side opening.

According to the above various aspects, each of the plurality of flipping assemblies of the at least one sludge turning device has one or more blades or ratchets extending radially outward from the rotating shaft, wherein The side edges of the front end of the scrapable member on the one or more blades or ratchets may scrape or partially scrape the sludge adjacent the at least one side opening.

According to the above various aspects, the opening direction of the side opening is one with the longitudinal direction of the housing Fixed angle.

According to each of the above aspects, there is a curved path for drying the gas from the at least one communication port to the side opening.

According to the above various aspects, the at least one sludge turning device includes two sludge turning devices, wherein each of the plurality of turning assemblies has a front end of at least one blade or ratchet or is mounted on the at least one blade Or the side edge of the front end of the scraping member on the ratchet may scrape the sludge near the side opening, wherein the plurality of flipping of one of the two sludge turning devices The plurality of flipping assemblies of the assembly and the other are staggered with each other.

According to the above various aspects, the return housing vertically abuts one end of the housing, wherein a lower portion of the return chamber is provided with a passage for communicating the cleaning port of the second drying chamber, and The upper portion thereof is provided with a return passage for communicating the return port of the first drying chamber and a discharge port communicating with the sludge collecting device.

According to each of the above aspects, the return housing is integrally formed with the housing.

According to each of the above aspects, the returning device is a screw conveyor, and the screw conveyor has a rotating shaft and a spiral.

The present invention also provides a method of drying sludge using the sludge drying apparatus according to any one of the above aspects, the method comprising the steps of: passing sludge through a feed for sludge to be dried Passing into the first drying chamber; causing at least one stain disposed in the first drying chamber The plurality of flipping assemblies of the mud turning device rotate to shear, crush and flip the sludge so that the front end of at least one blade or ratchet on each flipping assembly or the front end of the scrapable component mounted on the blade or ratchet The side edge scrapes off the sludge in the vicinity of the at least one side opening, wherein the at least one side opening is at least one of a plurality of communication ports formed on the partition plate separating the curved surfaces of the first drying chamber and the second drying chamber a bridge disposed above the communication port is defined together with the partition plate; the drying gas is introduced into the second drying chamber through the at least one air inlet, and enters through a curved path from the at least one communication port to the side opening a first drying chamber; the exhaust gas after drying the sludge and the dried sludge are respectively discharged through the exhaust port and the discharge port of the first drying chamber; and the dried sludge is along the second a longitudinal passage of the bottom of the drying chamber is discharged from a cleaning port provided at one end of the second drying chamber; and the dried sludge is conveyed from one end of the return chamber to the other end communicating with the return port through a return device With Mixing said sludge to be dried in the first drying chamber.

According to the above various aspects, the dried sludge is lifted from the lower portion of the return chamber to the upper portion of the return chamber through a passage communicating with the cleaning port and enters through the return passage communicating with the return port. The first drying chamber.

The dried sludge is conveyed to the sludge collection device by a discharge port provided in the upper portion of the return chamber for communication with the sludge collection device.

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 longitudinal cross-sectional view of a bottom dry sludge drying device of the present invention;

Figure 2 is a transverse cross-sectional view of the sludge drying device of Figure 1;

Figure 3 is a partially cutaway perspective view of the sludge drying device shown in Figure 1;

Figure 4 is an exploded perspective view of the sludge drying device shown in Figure 1;

Figure 5 is an enlarged perspective view of the portion A circled in Figure 1, showing the bridge member above the communication port;

Figure 6 is an enlarged cross-sectional view of the portion A circled in Figure 1, showing the position where the blade or ratchet is on one side of the bridge;

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

Figure 8 is a transverse cross-sectional view of the bridge taken along line M-M of Figure 7;

Figure 9 is a top cross-sectional view of the bridge taken along line N-N of Figure 7;

Figure 10 is a perspective view of the second drying chamber of the sludge drying device;

Figure 11 is a longitudinal cross-sectional view showing another embodiment of the bottom dry sludge drying apparatus of the present invention;

Figure 12 is a partially cutaway perspective view of the sludge drying apparatus of Figure 11;

detailed description

1 and 2 show a preferred embodiment of the bottom dry sludge drying apparatus of the present invention, respectively, in a longitudinal and transverse cross-section. The sludge drying apparatus 1 of the present invention comprises a casing, wherein the casing comprises a body 2, an upper cover (or cover) 3 and a bottom plate 4a. A partitioning plate 4 is provided in the casing for separating the internal space of the casing from the two chambers as the first drying chamber 6a and the second drying chamber 6b, respectively. A plurality of communication ports 5 for communicating the first drying chamber 6a and the second drying chamber 6b are 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, it may have other arrangements. The upper portion of the body 2, the upper cover 3, and the partitioning plate 4 constitute a first drying chamber 6a, and the lower portion of the body 2, the partitioning 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 housing is rectangular, but it can also be square, polygonal, elliptical or other shapes.

As shown in the figure, on the upper cover 3 of the housing, respectively, for introducing the to be dried or to be dried a feed port 8 of sludge and an exhaust port 10 for exhausting exhaust gas or dry gas after drying the sludge, and on an end wall of the upper portion of the body 2 remote from the feed port 8 and near the partition plate 4. A discharge port 9 for the dried sludge is provided. In a further embodiment, the feed port 8 and the exhaust port 10 for the first drying chamber 6a may be disposed at any position on either of the body 2 or the upper cover 3 as needed, that is, the first drying Any position of the upper portion of the chamber 6a. 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.

As shown in Fig. 2, the partitioning plate 4 may be curved downwardly or have a concave upper surface, that is, a curved portion of the concave portion, in a transverse direction transverse to the longitudinal direction G of the casing. The segment protrudes downward from the first drying chamber 6a toward the second drying chamber 6b, or the first drying chamber 6a has a concave bottom. A plurality of spaced apart rectangular communication ports 5 are formed on the curved partition plate 4 and a bridge member 401 is provided above each of the communication ports. The shape of the communication port 5 may be trapezoidal, rectangular, triangular, arched, circular, or the like. The communication port 5 is not limited in shape and number, and may be determined as needed, but the longitudinal direction X of each of the communication ports 5 substantially intersects with the longitudinal direction G of the casing, preferably both of which are perpendicular to each other. And the bridge above the communication port can also be correspondingly changed based on the shape of the communication port.

Figure 3 shows the internal structure of the sludge drying device shown in Figure 1, in which two flipping devices 7a for turning the sludge are arranged in parallel in the longitudinal direction G of the casing in the

first drying chamber

6a, 7b. Since the two

flipping devices

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

holes

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

Referring to Fig. 2, the partitioning plate 4 having a curved surface in the first drying chamber 6a has two concave portions, wherein each concave portion faces one of the

turning devices

7a or 7b, and a set is formed thereon which is spaced apart from each other. Multiple communication ports 5. Usually, the number of concave portions or regions on the partition plate 4 of the curved surface coincides with the number of the turning means, and the concave portion may be a circular arc shape. A plate bridge 401 may be disposed above each of the communication ports 5, including a flat plate, a curved panel, a herringbone plate, and the like. In addition, the bridge member 401 may be provided on one or more of the communication ports 5, and the number of communication ports and the number of the bridge members need not be in one-to-one correspondence.

Figure 4 is an exploded perspective view showing another preferred embodiment of the bottom dry type sludge drying apparatus of the present invention, wherein the upper portion of the body 2 is integrally formed with the partitioning plate 4, and the lower portion thereof is integrated with the bottom plate 4a. Forming. As shown, a plurality of communication ports 5 are formed at the bottom of the first drying chamber 6a, that is, the partition plate 4, wherein the plurality of communication ports 5 are arranged in two rows along the longitudinal direction G of the casing, and in each row The plurality of communication ports 5 are arranged at a lower interval of the lower concave portion at a certain interval. Although the communication port 5 on the partitioning plate 4 facilitates the drying gas from the second drying chamber 6b into the first drying chamber 6a and passes through the sludge and is discharged from the exhaust port 10, when the sludge to be dried enters After the spout 8 is placed and stacked on the partitioning plate 4 of the first drying chamber 6a, a part of the sludge passes through the communication port as the turning

members

702a, 702b of the

turning device

7a, 7b are flipped and the drying gas acts. 5 falls or leaks from the first drying chamber 6a into the second drying chamber 6b. In order to reduce the leakage of the sludge, the bridge member 401 is disposed above the communication port 5, thereby reducing the sludge from the first drying chamber 6a or leaking into the second drying chamber 6b through the communication port 5 by the bridge member 401. . 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 X 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. 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 partition plate 4, and a side opening 402 may be formed on one side of the bridge 401, or A side opening 402 is formed on each side thereof. Due to the presence of the side opening 402, the drying gas needs to be diverted after flowing into the communication port 5 to flow to the side opening so as to pass through the curved path to reach the first drying chamber 6a. Similarly, the sludge also needs to pass through the side opening 402 to the communication port 5 The curved path can leak from the first drying chamber 6a to the second drying chamber 6b. Despite the release of sludge The amount of leakage is greatly reduced, but the sludge accumulated in the vicinity of the side opening also interferes with the flow of the dry gas from the second drying chamber 6b into the first drying chamber 6a. To facilitate the flow of the drying gas, the blades or ratchets 703a, 703b of the flipping

assemblies

702a, 702b are designed to scrape sludge near the side opening 402 of the bridge 401.

Fig. 5 shows an enlarged structure of the portion A circled in Fig. 1. The communication port 5 is formed at a concave portion of the partition plate 4 of a part of the curved surface, and the longitudinal direction X of the communication port intersects with the longitudinal direction G of the casing, preferably perpendicular. The bridge 401 above the communication port 5 spans the communication port 5 in the longitudinal direction and covers the communication port 5 in the width direction, but may partially cover the communication port 5. When the bridge member 401 is a flat plate and the recessed portion of the partitioning plate 4 near the communication port 5 is a circular arc shape, the side opening 402 has a crescent shape. Therefore, the shape of the side opening 402 depends on the shape of the bridge 401 and the degree of bending of the curved plate of the curved surface. Preferably, the concave portion of the curved surface facing the concave portion of the flipping device has a circular arc shape in the lateral direction, and the radius of the circular arc shape may be substantially larger than the axis of the rotating shaft to the longer blade of the flipping assembly. Or the distance of the tip of the ratchet such that the leading end of the blade or ratchet of the flipping assembly approaches the bottom of the drying chamber such that the distance of the tip of the blade or ratchet from the dividing plate is substantially equal within the scraping range.

Figure 6 is a cross-sectional view taken in the width direction of the bridge member in the portion A circled in Figure 1, wherein the blade or ratchet scraping tip of the flipping assembly is located at one of the bridge members 401 side. As shown, the bridge 401, together with the partition 4, forms two side openings 402 on either side of the bridge, and the vanes or ratchets 703 are in the vicinity of one of the side openings 402 for scraping. mud. Generally, the opening direction of the side opening is substantially parallel to the longitudinal direction G of the housing. In addition to the scraping action, the blades or ratchets 703a, 703b of the flipping

assemblies

702a, 702b also function to shear, break and flip the sludge. In another embodiment, a side fence may be provided in the width direction of the bridge 401, that is, in a direction substantially transverse to the longitudinal direction G of the housing to block one of the side openings 402, leaving only the other The side opening 402 allows the drying gas to enter the first drying chamber 6a in one direction. The side dam is disposed in the side opening 402 along the length of the bridge 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 side dams is such that the drying gas flows out of the side opening 402 into the first drying chamber 6a in only one direction, and prevents the drying gas from entering the first drying chamber from the opposite direction to reduce sludge leakage.

Referring to Figures 1-4, the two

flipping devices

7a, 7b are arranged such that the first flipping assembly 702a on the first rotating shaft 701a and the second flipping assembly 702b on the second rotating shaft 701b are respectively spaced apart from the two rows. The piece 401 corresponds. Flipping assembly 702a of flipping

device

7a or 7b or The blade or ratchet 703a or 703b of 702b is of sufficient length such that when the flipping

assembly

702a or 702b rotates with the

rotating shaft

701a or 701b, the side edges of the leading end of the blade or ratchet 703a or 703b can scrape the bridge 401 The sludge near the side opening 402. At least one of the plurality of flipping

assemblies

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

members

702a and 702b does not have to correspond one-to-one with the number of the communication ports 5 or the bridge members 401 above them. In another embodiment, referring to Fig. 4, the

scrapable members

704a, 704b can be mounted on the blades or ratchets of the

flip assembly

702a or 702b as needed to scrape the side openings with the side edges of the front end of the scrapable member. Sludge near 402. a blade or ratchet having a scrapable front end or a blade or ratchet flipping assembly having a scrapable member mounted thereon and corresponding to the bridge member for flipping the blade or ratchet scraping front end when the assembly is rotated or The side edge of the front end of the scrapable member can scrape the sludge near the side opening of the bridge member, so that the dry gas having entered the communication port 5 smoothly passes through the side opening 402 into the first drying chamber 6a. In addition, the blade or ratchet 703a of the flipping assembly having the scrapable front end or the blade or ratchet on which the scraping member is mounted may be located between the two bridges 401 so as to scrape the front end or may be The side edges of the front ends of the scraping members may scrape the side openings 402 of the opposite sides of the two bridge members 401.

Figure 7 shows another preferred embodiment of the bridge wherein the side opening of the bridge is modified. Figures 8 and 9 show the structure of the bridge of Figure 7 in a transverse cross-sectional view and a horizontal cross-sectional view, respectively. Referring to FIGS. 7-9, a first baffle 403a is disposed in the width direction of the bridge member 401, that is, in the opening direction of the side opening to block one of the side openings 402 of the bridge member 401, and the second or the other A 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, preferably for example, an angle of 0°-85°. 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 passing through the side opening 402 or the opening 404a, so that the leakage path of the sludge from the slit 404b to the communication port 5 can be reduced to the second drying chamber 6b, and the dry gas can be smoothly flowed in. It is inside the first drying chamber 6a. In addition, it is possible to reduce the leakage of sludge by forming a plurality of small through-hole arrays on the

baffle

403a or 403b.

Referring to Figures 3 and 4, in two flipping

devices

7a, 7b arranged in a staggered relationship with each other, The scrapable front end of the blade or ratchet 703a of the first flipping assembly 702a on a rotating shaft 701a or the front end of the scrapable member fixed thereon can be adjacent to the second rotating shaft 701b and located at two adjacent second Flipping between components 702b, and vice versa. This shortens the axial spacing between the first rotating shaft 701a and the second rotating shaft 701b, and also avoids interference between the first turning assembly 702a and the second turning assembly 702b, thereby making the overall structure of the sludge drying device compact. Additionally, the number of flipping

assemblies

702a, 702b on the two

flipping devices

7a, 7b and the number of vanes or ratchets 703a, 703b on each flipping assembly may be the same or different. 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. 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 of the

components

702a, 702b. The side edge of the front end of the scraping member or the scraping member can be scraped off to scrape the sludge near the side opening 402 of the bridge 401 so that the dry gas smoothly flows into the first drying chamber 6a. In other words, 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.

As shown, the external power unit drives the transmission, and the transmission device sequentially drives the first rotating shaft 701a of the first turning device 7a or the power input member of the second rotating shaft 701b of the second turning device 7b, such as a gear or The

pulleys

18a, 18b further rotate the

rotating shafts

701a and 701b. The first rotating shaft 701a and the second rotating shaft 701b may be arranged to be reversely rotatable relative to each other or in the same direction as needed.

Figure 10 shows a preferred embodiment of the second drying chamber, wherein the second drying chamber 6b comprises an air inlet 15 provided on a side wall of the lower portion of the body 2, i.e. the air inlet 15 is located at the second On the side wall of the drying chamber 6b, the drying gas used for the sludge to be dried enters into the second drying chamber 6b, and the inlet port may be one or more. Additionally, the air inlet 15 may be disposed on or in the circumferential wall including the side walls and the end walls. Despite the bridge member 401 above the communication port 5 of the partition plate 4 and the scrapable front end of the blade or ratchet of the flipping

assembly

702a, 702b or the front end of the

scrapable members

704a, 704b mounted on the blade or ratchet The scraping of the sludge near the side opening 402 of the bridge 401 by the side edges 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 curved path of the side opening 402 or the slit 404b to the communication port 5 leaks into the second drying chamber 6b. In order to clear the drain The sludge leaking into the second drying chamber 6b is provided with a cleaning port 15a 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, wherein The port 15a serves to discharge 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. The discharge device 25 is disposed at a position of the bottom of the second drying chamber 6b. The discharge device may be a screw conveyor 25, but it may also be a belt conveyor, a net chain conveyor, a gas conveyor, or the like. The auger 25 has a rotating shaft 25a and a screw 25b fixed to the rotating shaft 25a, wherein the rotating shaft 25a is disposed in the shaft hole of the end wall of the second drying chamber 6b, and one end thereof is provided with a power input member 25c so that When the transmission is rotated by the power input member driving rotary shaft 25a, the screw 25b can move the sludge to the cleaning port 15a on the end wall of the second drying chamber 6b and discharge the casing. The second drying chamber 6b has a substantially funnel shape in the lateral direction, and the side wall, that is, the side wall of the lower portion of the body 2 is gradually narrowed from the partitioning plate toward the bottom thereof, and the shape of the bottom portion at the narrowed portion may be an arc. The radius of the shape or semicircular shape, the arc or the semicircle is slightly larger than the radius of the rotary spiral 25b, so that a longitudinal passage of an arcuate section is formed at the bottom of the second drying chamber 6a. 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 to be removed from the second drying chamber 6b by the auger 25 disposed 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 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.

In order to make full use of the re-dried sludge in the second drying chamber 6b, it can be conveyed to the first drying chamber 6a for mixing with the sludge to be dried. Referring to Figures 1-4, a returning device for conveying dried sludge is provided in the casing, wherein the returning device is vertically located between the first drying chamber 6a and the second drying chamber 6b and passes through the points. A return hole 5a formed in the partition 4. The returning device may be a screw conveyor 26, but it may also be a tipping type, a scraper type conveyor or the like. The auger 26 has a rotating shaft 26a and a screw 26b fixed to the rotating shaft 26a, wherein one end of the rotating shaft 26a may be disposed in a shaft hole of the upper cover 3, and the other end thereof may be disposed on the bottom plate 4a. In the shaft hole, the shaft hole may also be formed on the base 26d provided on the bottom plate 4a. A power input member 26c is provided at one end of the rotating shaft 26a, such as near the upper cover, so that the screw 26b can transport the dried sludge in the second drying chamber 6b when the transmission rotates by the power input member to drive the rotating shaft 26a. It is introduced into the first drying chamber 6a to be mixed into the sludge to be dried.

Referring to Fig. 2, the sludge drying apparatus 1 further includes an air blowing device 12 not shown in Fig. 1, wherein the air blowing device 12 communicates with the gas inlet 15 of the second drying chamber 6b via the duct 12a to blow dry gas. Go to 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 sent to 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 or the like. 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. Also, the air-inducing device 13 can be replaced 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 the heating device (not shown) may be separately disposed at an upstream position or a downstream position of the air blowing device, or may be combined with the air blowing device. Integrated together. 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. 11 shows another preferred embodiment of the bottom dry sludge drying apparatus of the present invention, wherein the returning means is disposed outside the casing. Fig. 12 shows the internal configuration of the sludge drying device of Fig. 11 in a cutaway perspective view. Parts that are the same or similar to those of the sludge drying apparatus of Figs. 1 and 2 will not be described again, but only the portions different therefrom will be described in detail. In the sludge drying device, the return casing 27 is vertically disposed on the side outside the end of the casing of the sludge drying device, wherein the return device is disposed in the return chamber of the return casing 27 . The returning device may be a screw conveyor 26, or may be a belt type, a net chain type, and a gas conveying device, and a tipping type, a funnel type conveying device, or the like. The return chamber of the return housing 27 is provided with a feed passage 27a formed at a lower portion thereof to the cleaning port 15a of the second drying chamber 6b, and an upper portion thereof forms a return passage 27b and a discharge opening 27c, wherein the returning material The passage 27b leads to a return port 28 formed on the upper end portion of the body 2, that is, the end wall of the first drying chamber 6a, so that the drying by the screw conveyor 26 is completed. The sludge is returned to the first drying chamber 6a through the return port 28 and mixed with the sludge to be dried, and the discharge port 27c is communicated with the sludge collecting device to transport the dried sludge as a product to the collection. device. The return housing 27 shown in the figures is separate from the housing of the sludge drying device, however, it is conceivable to integrate the two housings together, for example by using a part of the end wall of the housing for returning The side wall of the casing 27 is passed, and the screw conveyor located in the return chamber transfers the dried sludge from the cleaning port 15a of the second drying chamber 6b to the return port 28 of the first drying chamber 6a. Alternatively, the returning device may be disposed at other positions outside the casing and the returning operation may be realized by, for example, a belt conveyor.

Referring to Figures 1, 2 and 11, 12, the sludge can be dried using the bottom dry sludge drying apparatus 1 of the present invention. As the sludge to be dried is fed into the first drying chamber 6a by a conveying device not shown, the external power device drives the rotating shaft to rotate by the transmission device and the power input member, thereby driving the turning assembly to rotate, so that the flipping assembly is rotated. Each blade or ratchet constantly flips the sludge. At least one blade or ratchet scraping front end of the flipping assembly or the front end of the scraping member mounted on the blade or ratchet is spaced at a time interval while the flipping assembly continuously shears, shreds, and flips the sludge. The sludge near the side opening 402 of the bridge can be scraped off. The air blowing device 12 delivers the dry gas to the second drying chamber 6b via the duct 12a and the gas inlet 15. The flow of dry gas is associated with the operation of the flipping

assemblies

702a, 702b of the flipping

devices

7a, 7b, the air blowing means 12 and the air guiding means 13. The scraping of the sludge near the tip end of the blade or ratchet of the flipping assembly or the front end of the scrapable member mounted on the blade or ratchet to the sludge near the side opening 402 facilitates the drying gas entering the first drying chamber 6a. As the blade or ratchet of the flipping assembly in the first drying chamber 6a shears, breaks and flips the sludge and the drying effect of the drying gas on the sludge, the granularity of the sludge is from agglomerate or fragmented to granular. Gradually granulate. Moreover, the scraping of the sludge near the side opening 402 promotes the drying gas to enter the first drying chamber 6a through the curved path from the communication port to the side opening, and the contact frequency of the drying gas with the sludge is greatly increased, and the fouling is shortened. The drying time of the mud reduces the amount of sludge leaking from the first drying chamber 6a to the second drying chamber 6b. The flow direction of the drying gas entering the first drying chamber 6a at the side opening 402 is tangential to the scraping front end of the blade or ratchet or the circular path of the rotation of the scrapable member mounted at the front end of the blade or ratchet At an angle to each other, usually roughly vertical. Further, depending on the shape of the bridge, the opening direction of the side opening 402 may be at an angle different from the longitudinal direction of the housing, preferably -30 to 30, generally substantially parallel, so that the drying gas leaves the side opening. The direction is substantially parallel to the axial direction of the rotating shaft. After the drying of the sludge is completed, the drying gas is passed through the air guiding device 13 via the first drying chamber 6a. The exhaust port 10 and the conduit 13a are introduced into the atmosphere or a gas treatment system for subsequent processing. After drying, the moisture content of the sludge is significantly reduced and discharged from the discharge port 9.

The rotational trajectory of the tip of the flipping assembly of the flipping device or the blade or the ratchet or the top of the scrapable member is in contact with the communicating opening 5 of the curved partitioning plate 4 or the concave curved shape of the vicinity of the bridge 401 The matching sludge to be dried which enters the first drying chamber 6a is accumulated in a lower position of the concave curved region. When the side edge of the front end of the blade or ratchet of the flipping assembly or the scraping member mounted on the blade or the ratchet sweeps over the side opening 402 to remove the sludge in the vicinity thereof, it is scraped and flipped The sludge is also more easily returned to the lower region of the first drying chamber 6a along the concave curved contour of the partition plate, thereby increasing the frequency of contact of the drying gas with the sludge. In order to further reduce the leakage of sludge to the second drying chamber, one of the two side openings 402 formed by the partitioning plate 4 and the bridge 401 is generally blocked, and the opening of the opposite side is utilized at the other side opening 402. A plurality of grids 405 disposed at an angle in the opening direction form a plurality of slits 404b. This can prevent the leakage of the sludge and the smooth flow of the dry gas into the first drying chamber 6a through the curved path from the communication port to the slit.

In order to remove the sludge which is dropped or leaked into the second drying chamber 6b by the first drying chamber 6a by the curved path from the side opening 402 to the communication port 5, the discharge device such as the auger 25 can be continuously or intermittently operated. Therefore, the sludge leaking from the first drying chamber 6a into the second drying chamber 6b may fall along the side wall of the inclined surface into the longitudinal passage of the bottom of the second drying chamber 6b and be directed by the auger toward one end of the housing. The cleaning port 15a is transported.

In order to function as a dry sludge leaking from the first drying chamber to the second drying chamber, the returning device can transport the sludge from the second drying chamber to the first drying chamber. When the returning device is disposed in the casing of the sludge drying device, the spiral 26b of the screw conveyor 26 conveys the sludge in the second drying chamber 6b from the spiral 25b to the vicinity of the cleaning port 15a through the partition plate 4 The return hole 5a is transferred to the first drying chamber 6a to mix the dried sludge to the sludge to be dried. This blending not only accelerates the drying of the sludge to be dried but also increases its fluidity. In addition, the operation of the returning device can be adjusted as required, for example, when it is not necessary to convey the dried sludge to the first drying chamber, the movable baffle 29 at the cleaning port 15a can be opened to transport the sludge to the shell. Outside the body. Similarly, when the returning device is disposed outside the casing of the sludge drying device, the screw 26b of the returning device such as the screw conveyor 26 will pass through the cleaning port 15a and the passage 27a from the second drying chamber 6b into the return casing 27 The dried sludge in the return chamber is transferred from one end of the return chamber to the other end of the return chamber as described above. The sludge located at the upper portion of the return chamber enters the first drying chamber 6a through the return passage 27b and the return port 28 and is to be dried. Sludge mixing. In order to properly use the dried sludge, a movable shutter can be provided at the discharge port 27c. For example, when it is not necessary to convey the dried sludge to the first drying chamber, the movable shutter at the discharge opening 27c can be opened to convey the sludge as a product to the sludge collecting device. In the monomer-type bottom drying type sludge drying device, a hot drying gas is usually used to dry the sludge, and thus, it can be heated by a heating device, and the hot drying gas is sent to the second drying chamber 6b by the air blowing device. Or in the form of a drying device that uses a drying gas delivered by the air blowing device.

Further, as shown in FIG. 1, in order to contribute to the improvement of the drying effect of the sludge, it is advantageous to arrange the feed port 8 on the cover 3 close to one end of the casing, and to make the discharge port 9 located in the casing. At the other end, and the exhaust port 10 is disposed at the same end as the feed port 8, and the flipping

devices

7a, 7b adopt a type which can both turn the sludge and push the sludge to move in the longitudinal direction G of the casing. Flip the device. When the sludge to be dried is conveyed from the feed port 8 into the first drying chamber 6a and laid on the partitioning plate 4, the second drying chamber 6b is passed along the curved path from the communication port 5 to the side opening 402. The drying effect of the drying gas entering the first drying chamber 6a on the continuous drying of the sludge and the turning, shearing and crushing of the

turning devices

7a, 7b, the granularity of the sludge is changed from large to small and gradually changes from granular to powdery. Moreover, the water content thereof is gradually lowered, and the

turning devices

7a, 7b push the sludge gradually toward the discharge port 9 while turning the sludge. Therefore, the sludge which is closer to the discharge port 9 is drier, and the dry gas becomes smoother when it enters the first drying chamber 6a from the side opening 402 in the vicinity thereof. Therefore, the drying gas near the discharge port 9 can also dry the sludge on the upper side of the casing from the discharge port to the feed port in the longitudinal direction G of the casing, thereby prolonging the drying gas and Sludge contact time.

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 bottom drying sludge drying device, the sludge drying device comprising:

a housing, wherein a curved partition plate is disposed in the housing to divide a space in the housing into a first drying chamber and a second drying chamber;

The curved partition plate has at least one concave portion in the first drying chamber, wherein a plurality of communication ports are formed in the at least one concave portion, and a bridge member is disposed above the at least one communication port Wherein the bridge member forms at least one side opening with the curved partition plate, and a return hole disposed on the curved partition plate;

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

At least one air inlet for the drying gas of the sludge to be dried disposed on the 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 at least one flipping member fixed to the rotating shaft, and the at least one lower portion The concave portions correspond such that each of the at least one flipping assembly of the at least one sludge turning device can scrape sludge adjacent the at least one side opening;

a returning device, wherein the returning device is disposed in the returning hole, wherein one end of the returning device is located in the first drying chamber, and the other end thereof is located in the second drying chamber, so that The sludge in the second drying chamber is delivered to the first drying chamber.
The sludge drying apparatus according to claim 1, further comprising a cleaning port for cleaning the sludge, wherein the cleaning port may be disposed on a circumferential wall or a bottom of the second drying chamber.
The sludge drying apparatus according to claim 1 or 2, wherein the plurality of communication ports are formed at a lower position of the concave portion of the partition plate of the curved surface at a certain interval.
A sludge drying apparatus according to any one of claims 1 to 3, wherein the bridge member is a plate member, wherein the plate member comprises a curved plate and a flat plate.
A method of drying sludge using the sludge drying apparatus according to any of the preceding claims, the method comprising the steps of:

The sludge is sent to the first drying chamber through a feed port for the sludge to be dried;

Rotating, crushing, and turning the sludge of the at least one sludge turning device disposed in the first drying chamber to shear, crush, and flip the sludge so that the front end of at least one blade or ratchet on each flipping assembly is mounted a side edge of the front end of the blade or ratchet on the scraping member scrapes off sludge adjacent to the at least one side opening, wherein the at least one side opening is separated by a curved surface separating the first drying chamber and the second drying chamber a bridge disposed above the at least one of the plurality of communication ports formed on the partition plate is defined together with the partition plate;

Passing dry gas into the second drying chamber through at least one air inlet, and entering the first drying chamber through a curved path from the at least one communication port to the side opening;

Drying the dried gas after drying the sludge and discharging the dried sludge through the exhaust port and the discharge port of the first drying chamber;

The sludge is conveyed from the second drying chamber to the first drying chamber through a return hole of the partitioning plate through a returning device.
A bottom drying sludge drying device, the sludge drying device comprising:

a housing, wherein a curved partition plate is disposed in the housing to divide a space in the housing into a first drying chamber and a second drying chamber;

The curved partition plate has at least one concave portion in the first drying chamber, wherein a plurality of communication ports are formed in the at least one concave portion, and a bridge member is disposed above the at least one communication port Wherein the bridge member forms at least one side opening with the curved partition plate;

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

Providing at least one air inlet for the drying gas of the sludge to be dried on the side wall or the bottom of the second drying chamber and a cleaning port for discharging the dried sludge;

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 to the rotating shaft, and the at least one lower portion The recessed portion corresponds such that each of the plurality of flipping assemblies of the at least one sludge turning device can scrape sludge adjacent the at least one side opening;

a returning device, wherein the returning device is disposed in a return chamber of the return housing outside the housing, and one end of the return chamber communicates with the cleaning port, and the other end thereof Said The return port is in communication to transport the dried sludge from the second drying chamber to the first drying chamber.
The sludge drying apparatus according to claim 6, wherein the plurality of communication ports are formed at a lower position of the concave portion of the partition plate of the curved surface at a certain interval.
The sludge drying apparatus according to claim 6 or 7, wherein the bridge member is a plate member, and wherein the plate member comprises a curved plate and a flat plate.
The sludge drying apparatus according to any one of claims 6 to 8, wherein the at least one side opening comprises two side openings, one of the side openings is provided with a shielding plate for blocking dry gas from After entering the drying chamber, the other side opening is provided with a plurality of grids.
A method of drying sludge using the sludge drying apparatus according to any one of claims 6-9, the method comprising the steps of:

The sludge is sent to the first drying chamber through a feed port for the sludge to be dried;

Rotating, crushing, and turning the sludge of the at least one sludge turning device disposed in the first drying chamber to shear, crush, and flip the sludge so that the front end of at least one blade or ratchet on each flipping assembly is mounted a side edge of the front end of the blade or ratchet on the scraping member scrapes off sludge adjacent to the at least one side opening, wherein the at least one side opening is separated by a curved surface separating the first drying chamber and the second drying chamber a bridge disposed above the at least one of the plurality of communication ports formed on the partition plate is defined together with the partition plate;

Passing dry gas into the second drying chamber through at least one air inlet, and entering the first drying chamber through a curved path from the at least one communication port to the side opening;

Drying the dried gas after drying the sludge and discharging the sludge through the exhaust port and the discharge port of the first drying chamber;

Discharging the dried sludge along a longitudinal passage of the bottom of the second drying chamber from a cleaning port provided at one end of the second drying chamber;

The dried sludge is transported from one end of the return chamber to the other end communicating with the return port by a returning device to be mixed with the sludge to be dried in the first drying chamber.