CN108341576B

CN108341576B - Municipal sludge drying treatment device

Info

Publication number: CN108341576B
Application number: CN201810103579.2A
Authority: CN
Inventors: 吴星华
Original assignee: Zhongwei Construction Engineering Co Ltd
Current assignee: WENZHOU HUARUI CONSTRUCTION Co.,Ltd.
Priority date: 2018-02-01
Filing date: 2018-02-01
Publication date: 2020-03-17
Anticipated expiration: 2038-02-01
Also published as: CN108341576A

Abstract

The invention discloses a municipal sludge drying treatment device which is characterized by comprising a drying shell, wherein the drying shell is provided with a feeding port, a discharging port and an exhaust port, a screw rod is rotatably connected in the drying shell and is connected with a driving piece, the screw rod is a hollow rod, a plurality of air outlets are formed in the circumferential direction of the rod part of the screw rod, the air outlets are communicated with the inside of the screw rod, and one end of the screw rod is connected with an air inlet pipe. The sludge drying device solves the problem that the drying efficiency is low because sludge is not uniformly heated in the shell of the drying machine due to the non-uniform distribution of the heating devices in the conventional sludge drying device.

Description

Municipal sludge drying treatment device

Technical Field

The invention relates to a drying device, in particular to a municipal sludge drying treatment device.

Background

Sludge or sludge in a plurality of lakes and rivers in China contains a large amount of combustible substances. In order to save energy and facilitate further processing, people adopt a sludge drying device to dry sludge as fuel. The existing drying device is only used for simple heating and drying, and steam with higher temperature generated in the drying process of sludge can not be recycled, so that the energy consumption in the drying process is higher, and the drying cost is high.

In order to solve the technical problems, the Chinese patent document with the authorization publication number of CN201318862Y in the prior art discloses a sludge drying device, which comprises a dryer shell, wherein the top of the dryer shell is provided with a sludge feeding hole, a steam outlet and a material returning hole; the bottom of the dryer shell is provided with a dried particle outlet; one or more than one feeding shaft is arranged in the shell of the dryer; the feeding shaft is formed by connecting two sections or three sections of hollow pipes; the lower part of the dryer shell is provided with a frame. The invention can recycle the steam with higher temperature generated in the sludge drying process through the steam outlet, and after being separated by the separator, the sludge in the steam is separated and then returned to the dryer shell from the material returning port, thereby reducing the waste of raw materials. In addition, the feeding shaft is divided into several hollow pipes which are not communicated with each other, part of the hollow pipes are heated by fresh heating medium, and the rest of the hollow pipes are heated by the recovered steam to dry the sludge, so that the heat energy utilization rate can be improved.

The sludge drying device has the problems that the sludge is heated unevenly in the shell of the dryer due to uneven distribution of the heating device, and the drying efficiency is low.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a municipal sludge drying treatment device, which solves the problem that the sludge drying device in the prior art is low in drying efficiency due to the fact that sludge is unevenly heated in a dryer shell because heating devices are unevenly distributed.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a municipal administration silt drying process device, includes dry casing, dry casing is equipped with charge door, discharge gate and gas vent, the dry casing internal rotation is connected with the screw rod, the screw rod is connected with the driving piece, the screw rod is hollow pole, be equipped with a plurality of air outlets in the week of screw rod pole portion, the air outlet is linked together with the screw rod is inside, the intake pipe is connected to the one end of screw rod.

By adopting the technical scheme, the driving piece is started to drive the screw to rotate, dry hot air is introduced into the air inlet pipe, the hot air flows into the inner cavity of the screw from the air inlet pipe, and then the hot air is discharged into the inner cavity of the drying shell from the air outlet on the screw; at the moment, sludge which is not dried is added into the inner cavity of the drying shell from the feeding hole, the sludge flows in the drying shell along with the rotation of the screw rod and moves towards the discharging hole, meanwhile, dry hot gas discharged from the air outlet enters the sludge to fully heat the sludge, the hot gas moves upwards in the sludge and is discharged from the air outlet together with moisture in the sludge; through heating silt from the hot gas of exhaust in the air outlet, the flow of hot gas in silt is even, and gets into the silt of a large amount of gases and can form the state of "boiling", makes the heating of silt more abundant, and the difficult caking of silt after the drying.

The invention is further configured to: the screw rod is provided with a plurality of air caps, and the air outlet is formed in one side, close to the discharge hole, of each air cap.

Through adopting above-mentioned technical scheme, be close to the air outlet of discharge gate one side and can effectively avoid causing the jam to the air outlet to the silt that the discharge gate removed.

The invention is further configured to: and a mud scraper is arranged inside the screw rod.

Through adopting above-mentioned technical scheme, meet with emergency such as outage when this municipal administration silt drying process device during operation, during silt flows backward into the screw rod, rotatable and take out the mud scraper and scrape out the silt in the screw rod.

The invention is further configured to: the drying shell is a cylindrical shell with the inner diameter equal to the outer diameter of the screw.

Through adopting above-mentioned technical scheme, the external diameter can impel silt to the discharge gate motion with the same screw rod of the internal diameter of dry casing to can strike off the silt of adhesion on dry casing inner wall.

The invention is further configured to: the upper end of the drying shell is provided with an exhaust groove, and the exhaust port is communicated with the exhaust groove.

Through adopting above-mentioned technical scheme, steam upward movement in silt enters into the exhaust duct of drying shell top together with the moisture in the silt, discharges from the gas vent again, and the exhaust duct can hold a certain amount of gas, prevents that silt from directly entering into and causing the jam in the gas vent.

The invention is further configured to: the exhaust port is connected with an exhaust pipe spirally wound outside the drying shell.

Through adopting above-mentioned technical scheme, the gas that gets into in the blast pipe still has certain heat, and the gas that has the heat carries out further heating along winding outside blast pipe to the silt in the dry shell body.

The invention is further configured to: the outside of dry casing is equipped with protective housing, the blast pipe is located between protective housing and the dry casing.

Through adopting above-mentioned technical scheme, the blast pipe can be avoided receiving the destruction to the protection casing, can also prevent that harmful gas from polluting operational environment when the blast pipe takes place to leak.

The invention is further configured to: the outer side of the protective shell is covered with a heat-insulating layer.

Through adopting above-mentioned technical scheme, the outer heat preservation of protecting sheathing keeps warm to the drying cylinder, avoids ambient temperature to influence drying effect, makes the heat obtain make full use of.

The invention is further configured to: the screw rod is connected with the air inlet pipe through a rotary joint.

Through adopting above-mentioned technical scheme, the screw rod that links to each other through rotary joint and intake pipe both can realize rotatoryly and can realize sealing.

In conclusion, the invention has the following beneficial effects: 1. the sludge is heated more fully, and the dried sludge is not easy to agglomerate; 2. the invention has simple structure and easy maintenance; 3. the invention can realize secondary utilization of heat, and is energy-saving and environment-friendly.

Drawings

FIG. 1 is an isometric view of the entirety of the embodiment;

FIG. 2 is an isometric view of the drying cylinder, screw and air inlet tube of an embodiment;

FIG. 3 is an enlarged view of a portion A of FIG. 2;

FIG. 4 is a partial cross-sectional view of an embodiment dryer can;

FIG. 5 is an isometric view of the screw of the embodiment;

FIG. 6 is a partial enlarged view of portion B of FIG. 5;

FIG. 7 is an isometric view of the mud scraper of an embodiment;

FIG. 8 is an enlarged view of a portion C of FIG. 5;

fig. 9 is an isometric view of the drying cylinder of the embodiment.

In the figure: 1. a frame; 2. a drying cylinder; 21. a hopper; 22. a discharge hopper; 23. an exhaust pipe; 24. a heat-insulating layer; 25. a protective housing; 26. drying the shell; 261. a feed inlet; 262. a discharge port; 263. an exhaust groove; 264. an exhaust port; 3. a screw; 31. a hood; 311. an air outlet; 32. a mud scraper; 4. an air inlet pipe; 5. a drive motor; 6. a rotary joint.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example (b): the utility model provides a municipal administration silt drying process device, as shown in figure 1, includes frame 1, is fixed with the cylindrical drying cylinder 2 that the level set up in the frame 1, is equipped with horizontally screw rod 3 in the drying cylinder 2, and screw rod 3 is coaxial with drying cylinder 2 and is connected with drying cylinder 2 rotation, and drying cylinder 2 is all stretched out at the both ends of screw rod 3, and the one end of screw rod 3 is connected with driving motor 5, and the other end is connected with intake pipe 4.

As shown in fig. 2, fig. 3 and fig. 4, the drying cylinder 2 includes a drying casing 26 and a protective casing 25 located outside the drying casing 26, a layer of heat insulating layer 24 covers the exterior of the protective casing 25, a loading hopper 21 is arranged at one end of the upper side of the drying cylinder 2 far away from the air inlet pipe 4, a discharging hopper 22 is arranged at one end of the lower side of the drying cylinder 2 close to the air inlet pipe 4, the loading hopper 21 and the discharging hopper 22 penetrate through the heat insulating layer 24 and the protective casing 25 to be communicated with the inner cavity of the drying casing 26, an exhaust pipe 23 is connected at one end of the upper side of the drying casing 26 close to the air inlet pipe 4, the exhaust pipe 23 is spirally wound outside the drying casing 26 and located between the protective casing 25 and the drying casing; the screw 3 is connected with an air inlet pipe 4 through a rotary joint 6.

As shown in fig. 4, 5 and 6, the screw rod 3 is a hollow rod, one end of the screw rod 3 is open and the other end is closed, the open end of the screw rod 3 is connected with the air inlet pipe 4, a plurality of uniformly distributed wind caps 31 are arranged on the side wall of the screw rod 3, the air outlet 311 of the wind caps 31 is arranged on one side of the wind caps 31 close to the discharge hopper 22, and the outer diameter of the screw rod 3 is the same as the inner diameter of the drying shell 26.

As shown in fig. 5, 7 and 8, a spiral mud scraper 32 is arranged inside the screw rod 3, the outer diameter of the mud scraper 32 is the same as the inner diameter of the screw rod 3, and one end of the mud scraper 32 close to the air inlet pipe 4 extends out of the screw rod 3.

Meet with emergency such as outage when this municipal administration silt drying process device during operation, in silt flows backward into screw rod 3, can break off the link of screw rod 3 and intake pipe 4, rotatory and outwards take out the mud scraper 32 and scrape out the silt in the screw rod 3.

As shown in fig. 4 and fig. 9, the drying shell 26 is provided with a feeding port and a discharging port 262, the feeding port and the discharging port 262 respectively correspond to the feeding hopper and the discharging hopper 22, the upper end of the inner cavity of the drying shell 26 is provided with a strip-shaped exhaust groove 263, the length direction of the exhaust groove 263 is parallel to the axis of the drying shell 26, and one end of the exhaust groove 263 close to the feeding port is not communicated with the feeding port; the upper side of the drying shell 26 is further opened with an exhaust port 264, the exhaust port 264 is located at one end of the exhaust groove 263 close to the air inlet pipe 4, and the air inlet end of the exhaust pipe 23 is connected with the exhaust port 264.

The working principle of the municipal sludge drying treatment device is as follows: firstly, starting a driving motor 5 to drive a screw rod 3 to rotate, introducing hot air into an air inlet pipe 4, enabling the hot air to flow into an inner cavity of the screw rod 3 from the air inlet pipe 4, and then discharging the hot air into an inner cavity of a drying shell 26 from an air outlet 311 on the screw rod 3; at this time, the sludge which is not dried is added into the inner cavity of the drying shell 26 from the feeding hopper, the sludge flows in the drying shell 26 along with the rotation of the screw 3 and moves towards the direction of the discharge port 262, meanwhile, the dried hot air discharged from the air outlet 311 enters the sludge to sufficiently heat the sludge, the hot air moves upwards in the sludge, enters the exhaust groove 263 above the drying shell 26 together with moisture in the sludge and then enters the exhaust pipe 23 from the exhaust port 264 to be discharged, the gas in the exhaust pipe 23 also has certain heat, and the gas with the heat further heats the sludge in the drying shell 26 along the exhaust pipe 23 wound outside the drying shell 26.

The sludge is heated by the hot gas exhausted from the air outlet 311, the hot gas flows uniformly in the sludge, and the sludge entering a large amount of gas can form a boiling state, so that the sludge is heated more sufficiently, and the dried sludge is not easy to agglomerate; the screw 3 having the same outer diameter as the inner diameter of the drying casing 26 may push the sludge toward the discharge port 262 and may scrape off the sludge adhered to the inner wall of the drying casing 26; the heat preservation layer 24 outside the protective shell 25 is used for preserving heat of the drying cylinder 2, so that the drying effect is prevented from being influenced by the external temperature, and the heat is fully utilized.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.

Claims

1. The utility model provides a municipal administration silt drying process device, includes dry casing (26), dry casing (26) are equipped with charge door (261), discharge gate (262) and gas vent (264), dry casing (26) internal rotation is connected with screw rod (3), screw rod (3) are connected with the driving piece, screw rod (3) are hollow rod, be equipped with a plurality of air outlets (311) in the circumference of screw rod (3) pole portion, air outlet (311) are linked together with screw rod (3) inside, intake pipe (4), its characterized in that are connected to the one end of screw rod (3): a protective shell (25) is arranged on the outer side of the drying shell (26), the exhaust port (264) is positioned on the upper side of the drying shell (26), the exhaust port (264) is connected with an exhaust pipe (23) spirally wound on the outer side of the drying shell (26), and the exhaust pipe (23) is positioned between the protective shell (25) and the drying shell (26); the inner wall of the upper end of the drying shell (26) is also provided with an exhaust groove (263), and the exhaust port (264) is communicated with the exhaust groove (263).

2. The municipal sludge drying treatment apparatus of claim 1, wherein: the screw rod (3) is provided with a plurality of air caps (31), and the air outlet (311) is formed in one side, close to the discharge hole (262), of the air caps (31).

3. The municipal sludge drying treatment apparatus of claim 1, wherein: and a mud scraper (32) is arranged in the screw (3).

4. The municipal sludge drying treatment apparatus of claim 1, wherein: the drying shell (26) is a cylindrical shell with the inner diameter equal to the outer diameter of the screw (3).

5. The municipal sludge drying treatment apparatus of claim 1, wherein: the outer side of the protective shell (25) is covered with an insulating layer (24).

6. The municipal sludge drying treatment apparatus of claim 1, wherein: the screw rod (3) is connected with the air inlet pipe (4) through a rotary joint (6).