CN211339239U

CN211339239U - Sludge drying system

Info

Publication number: CN211339239U
Application number: CN201921626087.8U
Authority: CN
Inventors: 宋崎瑞; 叶春雨; 周晓娟
Original assignee: Nanjing Zhongdian Environmental Protection Solid Waste Resources Co ltd
Current assignee: Nanjing Zhongdian Environmental Protection Group Co ltd
Priority date: 2019-09-27
Filing date: 2019-09-27
Publication date: 2020-08-25
Anticipated expiration: 2029-09-27

Abstract

The utility model provides a sludge drying system, which comprises a belt type drying machine, a filtering device, a crushing device and a granulating device which are connected in sequence; the filtering device, the crushing device and the granulating device are used for filtering, crushing and granulating the sludge respectively; and a sludge outlet of the granulating device is connected with a belt type drier. The utility model is suitable for a mud of various moisture contents has strengthened the stability of belt drier cloth system, has promoted the technical level of sludge transportation link, has reduced the putty risk of each link, has avoided equipment parking regularly, has overhauld and maintain, has improved the efficiency that mud was dealt with greatly, and the health of guarantee belt drier is put into operation and is made the contribution.

Description

Sludge drying system

Technical Field

The utility model relates to a sludge treatment process flow, in particular to a sludge drying system.

Background

Sludge drying incineration is an important method for harmless treatment of sludge. The sludge incineration can reduce the volume of the sludge to the minimum, recover energy, be used for power generation and heat supply and be thoroughly harmless. However, the sludge produced by sewage plants has high water content and cannot be simply used as power generation fuel, so the sludge needs to be dried. Under the background, the belt type drier is greatly promoted as a key technology of sludge drying. The belt type dryer also shows relatively great development changes.

The belt drier heats and dries the sludge by using an industrial heat source. Sludge is firstly extruded into a strip shape by a press machine and enters a mesh belt of the drying machine, and the sludge runs from a feeding end to a discharging end under the action of the mesh belt. The belt type drying machine has high heat exchange efficiency, the drying system is safe and simple to operate, the automation degree is high, the unit treatment capacity can be flexibly adjusted, and the treatment capacity is large.

However, the source of the sludge is complex, and impurities are more, so that the material distribution system of the belt type drying machine is unstable, and normal production is directly influenced. At present, a material distribution system with stable operation and related facilities are still lacked in the market.

SUMMERY OF THE UTILITY MODEL

To the technical problem, the utility model provides a sludge drying system carries out preliminary treatment such as filtration, breakage earlier before carrying out the mummification to mud.

In order to realize the purpose, the utility model adopts the following technical scheme:

a sludge drying system comprises a belt type drying machine, and also comprises a filtering device, a crushing device and a granulating device which are sequentially connected and used for filtering, crushing and granulating sludge; and a sludge outlet of the granulating device is connected with a belt type drier.

Further, the filtering device comprises a sludge storage bin, a sludge inlet of the filtering device is provided with a filtering grid, and a vibrator is arranged on the filtering grid; the sludge outlet of the sludge storage bin is connected with a crushing device.

Further, the filter grid is a 400 x 400mm polytetrafluoroethylene grid.

Further, the crushing device is a double-rotor impact crusher.

Furthermore, the granulation device comprises an extruder, a sludge outlet of the extruder is provided with a rectangular hole grid strip, and the rectangular hole grid strip is parallel to a cross-shaped pressure head of the extruder; a material distribution die head is arranged on the sludge outlet side of the extruder and is parallel to the rectangular hole grid bars; the sludge outlet of the material distribution die head is connected with a belt type drier.

Further, the cloth die head is a flat nozzle type die head.

Has the advantages that: the utility model is suitable for a mud of various moisture contents has strengthened the stability of belt drier cloth system, has promoted the technical level of sludge transportation link, has reduced the putty risk of each link, has avoided equipment parking regularly, has overhauld and maintain, has improved the efficiency that mud was dealt with greatly, and the health of guarantee belt drier is put into operation and is made the contribution.

Drawings

FIG. 1 is a main process flow diagram of the present invention;

FIG. 2 is a schematic view of a dual rotor impact crusher;

fig. 3 is a schematic view of an extruder.

FIG. 4 is a schematic side view of the extruder;

fig. 5(a), (b), and (c) are a front view, a side view, and a top view, respectively, of the cloth die.

Reference numbers in the figures: 1. sludge; 2. a feed inlet; 3. a housing; 4. a first rotor; 5. a second rotor; 6. a discharge port; 7. A liner plate; 8. a hammer head; 9. obtaining a finished product; 10. a cross head; 11. a rectangular hole grid strip; 12. a material distribution die head; 13. A sludge outlet; 14. an electric hydraulic trash remover.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings.

When the sludge transport vehicle unloads, the vibrator is started, the polytetrafluoroethylene grating is vibrated, sludge enters the sludge bin through the polytetrafluoroethylene grating, and the grating filters out fiber materials such as large bricks, large-particle-size impurities, cloth and the like.

The mud in mud storehouse passes through conveying equipment and gets into birotor impact crusher, the breaker is when handling mud, under the drive of motor, the rotor is high-speed rotatory, mud gets into the board hammer zone of action time, it is broken with the board hammer striking on the rotor, the back is thrown again and is broken once more to the impact device, then rebound the board hammer zone of action from the impact welt and break again, this process is repeated going on, the material gets into the impact chamber by big to little and is repeated broken, until mud by broken to required granularity, discharge by the discharge gate. This process breaks down relatively large pieces of sludge and impurities into small particle sizes.

And (4) after the sludge is subjected to the pretreatment process flow, the sludge enters a material distribution process flow. The pretreated sludge enters an extruder, a cross pressure head of the extruder extrudes the sludge through the rectangular hole grid bars, the sludge through the rectangular hole grid bars enters a material distribution die head, and the material is shaped and discharged. The rectangular hole grid bars are parallel to the cross-shaped pressure head, and the material distribution die head is parallel to the grid bars. The rectangular hole grid bars are composed of 8 round steel pipes DN25, the length of the square hole is 3m, and the width of the square hole is 8 mm. The distribution die head adopts a flat nozzle type die head, and a vertical steel wire is arranged at the outlet of the die head, so that sludge is convenient to divide, and the heating area of the sludge is increased. The cross pressure head is provided with a travel switch, a signal in place is pressed without feedback, the situation that the material is blocked by the rectangular hole grids is described, the cross pressure head returns to the place at the moment, the hydraulic side plates on the two sides of the extruding machine are opened, the hydraulic dirt cleaner is pushed out (twice in a reciprocating mode) to clean impurities and sludge above the grid strips, and the sludge and the impurities enter temporary storage bins at the two ends of the extruding machine together for temporary storage. After the cleaning is finished, the cross pressure head idles once to ensure the cleaning cleanness.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A sludge drying system comprises a belt type drying machine and is characterized by also comprising a filtering device, a crushing device and a granulating device which are connected in sequence; the filtering device, the crushing device and the granulating device are used for filtering, crushing and granulating the sludge respectively; and a sludge outlet of the granulating device is connected with a belt type drier.

2. The sludge drying system as claimed in claim 1, wherein the filtering device comprises a sludge storage bin, a sludge inlet of the sludge storage bin is provided with a filtering grid, and the filtering grid is provided with a vibrator; the sludge outlet of the sludge storage bin is connected with a crushing device.

3. The sludge drying system of claim 2, wherein the filter grid is a 400 x 400mm teflon grid.

4. The sludge drying system of claim 1, wherein the crusher is a double rotor impact crusher.

5. The sludge drying system as claimed in claim 1, wherein the granulating device comprises an extruder, a sludge outlet of the extruder is provided with a rectangular hole grid bar, and the rectangular hole grid bar is parallel to a cross-shaped pressure head of the extruder; a material distribution die head is arranged on the sludge outlet side of the extruder and is parallel to the rectangular hole grid bars; the sludge outlet of the material distribution die head is connected with a belt type drier.

6. The sludge drying system of claim 5, wherein the cloth die head is a flat nozzle die head.