Abstract

The present disclosure provides a bottom drying type sludge drying device, comprising: a housing in which a curved-face partition is provided for separating space in the housing into first and second drying chambers; a feed gate and an outlet provided on an upper portion of the first drying chamber, and a discharge gate provided on the circumferential wall of the first drying chamber. An inlet is provided on a side wall or bottom of the second drying chamber. The curved-face partition comprises a depressed area in which a communication opening is formed, and a bridge-shaped element is provided above the communication opening, forming a lateral aperture between the bridge-shaped element and the partition. A sludge stirring assembly is provided in the first drying chamber, which comprises a rotary shaft and a stirring unit fixed on the rotary shaft, and the stirring unit is configured to cut, break and stir the sludge and/or that a front end thereof faces and is close to the lateral aperture, such that the front end scrapes the sludge in or at the communication opening as the stirring unit rotates. The present disclosure further provides a method of drying sludge using a sludge drying device.

IPC Classes  ?

• F26B 11/12 - Machines or apparatus for drying solid materials or objects with movement which is non-progressive in stationary drums or other mainly-closed receptacles with moving stirring devices
• F26B 17/20 - Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by rotating helical blades or other rotary conveyors moving materials in stationary chambers the axis of rotation being horizontal or slightly inclined
• C02F 11/12 - Treatment of sludgeDevices therefor by de-watering, drying or thickening
• F26B 17/10 - Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by fluid currents, e.g. issuing from a nozzle
• C02F 11/121 - Treatment of sludgeDevices therefor by de-watering, drying or thickening by mechanical de-watering
• F26B 3/06 - Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried
• F26B 25/00 - Details of general application not covered by group or
• F26B 25/04 - Agitating, stirring, or scraping devices
• F26B 11/16 - Machines or apparatus for drying solid materials or objects with movement which is non-progressive in stationary drums or other mainly-closed receptacles with moving stirring devices the stirring device moving in a vertical or steeply-inclined plane

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 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 or at a bottom of the second drying chamber (6b); the curved partition plate (4) has a sunken portion; a communication opening (5) is formed at the sunken portion; a bridge piece (401) is provided above the communication opening (5) to form a side opening (402) between the bridge piece (401) and the partition plate (4); 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; and the stirring assembly (702a, 702b) is configured to be capable of cutting, breaking and stirring sludge, and/or a front end of the stirring assembly (702a, 702b) is configured to face toward and be adjacent to the side opening (402) to scrape the sludge in or around the communication opening (5) when the stirring assembly (702a, 702b) rotates. Also provided is a method for drying the sludge by using the sludge drying device (1).

IPC Classes  ?

• C02F 11/12 - Treatment of sludgeDevices therefor by de-watering, drying or thickening
• F26B 17/10 - Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by fluid currents, e.g. issuing from a nozzle

Abstract

A sludge drying system (1), comprising a conveying device (101), a conditioning device (102), a dehydration device (105) and a drying device (107); the drying device (107) comprises a casing; the casing has a partition wall (4) to divide the casing into a first drying chamber (6a) and a second drying chamber (6b); a communication opening (5) communicating the first drying chamber (6a) and the second drying chamber (6b) is formed on the partition wall (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 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) provided on the rotating shaft (701a, 701b) and capable of scraping sludge around the communication opening (5); and a blowing device (12) is in communication with the second drying chamber (6b) via the air inlet (15). Also provided is a method for drying the sludge by using the sludge drying system (1).

IPC Classes  ?

• C02F 11/12 - Treatment of sludgeDevices therefor by de-watering, drying or thickening
• F26B 17/10 - Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by fluid currents, e.g. issuing from a nozzle

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).

IPC Classes  ?

• C02F 11/12 - Treatment of sludgeDevices therefor by de-watering, drying or thickening
• F26B 17/18 - Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by rotating helical blades or other rotary conveyors moving materials in stationary chambers

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).

IPC Classes  ?

• C02F 11/12 - Treatment of sludgeDevices therefor by de-watering, drying or thickening
• F26B 17/10 - Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by fluid currents, e.g. issuing from a nozzle

Abstract

A sludge drying system (1), comprising a conveying device (101), a drying device (105) for receiving sludge and sending the sludge downstream, the drying device (105) comprising a housing, a partition plate (4) being disposed inside the housing so as to divide the housing into a first drying chamber (6a) and a second drying chamber (6b), a communication port (5) being formed in the partition plate (4) and communicating the first drying chamber (6a) with the second drying chamber (6b), a feeding port (8) and an air outlet (10) disposed on an upper portion of the first drying chamber (6a), a discharge port (9) disposed on a peripheral wall of the first drying chamber (6a), an air intake port (15) disposed on a side wall of the second drying chamber (6b), mixing devices (7a, 7b) disposed inside the first drying chamber (6a) and comprising rotating shafts (701a, 701b) and mixing assemblies (702a, 702b) disposed on the rotating shafts (701a, 701b) and capable of scraping off sludge near the communication port. An air blasting device (12) is in communication with the second drying chamber (6b) via the air intake port (15). Also provided is a sludge drying method using the sludge drying system (1).

IPC Classes  ?

• C02F 11/12 - Treatment of sludgeDevices therefor by de-watering, drying or thickening
• F26B 17/10 - Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by fluid currents, e.g. issuing from a nozzle

Abstract

A stirring device (7) adopted in a sludge drying device (1), the stirring device (7) comprising a rotating shaft (701), wherein two ends of the rotating shaft (701) are respectively and rotatably provided in shaft holes on walls at two sides of a drying chamber of the sludge drying device (1); a plurality of stirring assemblies (702) are fixedly installed on the rotating shaft (701) at predetermined intervals, and rotate with the rotating shaft (701); each stirring assembly (702) of the plurality of stirring assemblies (702) has a blade or a ratchet (703) extending outward in a radial direction from an axis of the rotating shaft (701); and the blades or the ratchets (703) corresponding to every two adjacent stirring assemblies (702) of the plurality of stirring assemblies (702) are spaced apart from each other by an angle α in a circumferential direction of a rotation of the rotating shaft. Also provided is a sludge drying device (1) using the stirring device (7).

IPC Classes  ?

• C02F 11/12 - Treatment of sludgeDevices therefor by de-watering, drying or thickening
• F26B 17/10 - Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by fluid currents, e.g. issuing from a nozzle

Abstract

A bottom-drying sludge drying device (1), comprising: a casing, wherein a first drying chamber (6a) and a second drying chamber (6b) are formed in the casing; a partition plate (4), provided between the first drying chamber (6a) and the second drying chamber (6b); a feeding port (8) and an air outlet (10), provided at an upper portion of the first drying chamber (6a); a discharging port (9), provided on a circumferential wall of the first drying chamber (6a); an air inlet (15), provided on a circumferential wall or at a bottom of the second drying chamber (6b); a communication opening (5), formed on the partition plate (4); and a sludge stirring device (7a, 7b), provided in the first drying chamber (6a), and comprising a rotating shaft (701a, 701b) and a stirring assembly (702a, 702b) fixed on the rotating shaft (701a, 701b). A size of the stirring assembly (702a, 702b) is determined to allow cutting, breaking and stirring sludge, and a tip of the stirring assembly (702a, 702b) faces toward and is adjacent to the communication opening (5) to scrape the sludge in or around the communication opening (5) when the stirring assembly (702a, 702b) and the rotating shaft (701a, 701b) rotate. Also disclosed is a method for drying the sludge by using the sludge drying device (1).

IPC Classes  ?

• C02F 11/12 - Treatment of sludgeDevices therefor by de-watering, drying or thickening
• F26B 17/10 - Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by fluid currents, e.g. issuing from a nozzle