CN210796174U

CN210796174U - Sludge dewatering device

Info

Publication number: CN210796174U
Application number: CN201921457302.6U
Authority: CN
Inventors: 周攀; 陈志寿; 梁斌; 李凯奇
Original assignee: CHINA LIGHT INDUSTRY WUHAN DESIGN ENGINEERING CO LTD
Current assignee: CHINA LIGHT INDUSTRY WUHAN DESIGN ENGINEERING CO LTD
Priority date: 2019-09-04
Filing date: 2019-09-04
Publication date: 2020-06-19
Anticipated expiration: 2029-09-04

Abstract

The utility model discloses a sludge dewatering device, which comprises a rotary drum, be provided with the toper binding off on the rotary drum, be provided with hollow rotating shaft in the rotary drum, the hollow rotating shaft outside is provided with outer spiral impeller, by separating the baffle in the hollow rotating shaft, hollow rotating shaft is located the part that separates the baffle both sides and advances mud section and pivot play water section respectively for the pivot, the pivot is advanced and has been seted up the inlet end hole on the mud section, the pivot is gone out and has been seted up the outlet end hole on the water section, pivot play water section inner wall is provided with interior spiral impeller, advance the mud hollow tube and pass the rotary drum and advance mud section intercommunication with the pivot, the tip that the pivot was gone out the water section extends the toper. The utility model provides a shortcoming that centrifugal sludge dewatering machine dehydration efficiency is low, introduced the negative pressure on original traditional centrifugal sludge dewatering's theoretical basis for on the position that forms ripe solid ring layer, mud and water can be faster, the separation is accomplished to the efficient under the dual function of centrifugal force and negative pressure, improve sludge dewatering efficiency.

Description

Sludge dewatering device

Technical Field

The utility model belongs to the water supply and drainage device field, concretely relates to sludge dewatering device is applicable to water supply and drainage.

Background

The water content of the sludge generated in the sewage treatment is high, generally between 97% and 99.6%, and the sludge has loose structure and large volume and is difficult to dispose and consume, so that the sludge needs to be further treated, namely a sludge dewatering process.

Sludge dewatering modes are many, and are roughly divided into: natural drying, mechanical dehydration, sludge drying, incineration and the like. Mechanical dehydration is widely applied because of its good dehydration effect, high efficiency, small occupied area and little influence of foul environment. Mechanical dehydration can be classified into three categories, vacuum filtration dehydration, filter-pressing dehydration and centrifugal dehydration according to the dehydration principle. The centrifugal machine has been used for sludge dewatering for decades, and has the advantages of compact structure, less accessory equipment, operation in a closed condition, little odor, no need of a filter medium, convenient maintenance and long-term automatic continuous operation. However, the water content of the sludge after centrifugal dehydration is still very high, and the sludge is not easy to separate when the solid-liquid density difference is very small, and the defects always restrict the development and the application of the centrifugal sludge dehydrator.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a sludge dewatering device to the above-mentioned problem that prior art exists, through the transformation to the hollow rotating shaft, promoted sludge dewatering device's dehydration efficiency greatly, can extensively be arranged in feedwater treatment and sewage treatment process.

In order to achieve the above object, the present invention provides the following technical solutions:

the utility model provides a sludge dewatering device, includes the rotary drum, be provided with the toper binding off on the rotary drum, be provided with hollow rotating shaft in the rotary drum, hollow rotating shaft outside is provided with outer spiral impeller, separate by separating the baffle in the hollow rotating shaft, the part that hollow rotating shaft is located to separate the baffle both sides is pivot mud feeding section and pivot play water section respectively, the pivot is seted up into the end hole on mud feeding section, the pivot is gone out to set up out the end hole on the water section, pivot play water section inner wall is provided with interior spiral impeller, it passes rotary drum and pivot mud feeding section intercommunication to advance the mud hollow tube, the pivot is gone out the tip of water section and is extended the toper binding off, pivot.

The rotating drum is cylindrical, one end of the rotating drum is a closed end, the other end of the rotating drum is provided with a conical closing-in, and the mud feeding hollow pipe penetrates through the closed end of the rotating drum to be communicated with the mud feeding section of the rotating shaft.

The hollow shaft as described above is collinear with the central axis of the drum.

The ratio of the length to the diameter of the drum as described above is 2.5 or more.

The taper angle of the tapered closing-in is 8-12 degrees.

The outer spiral impeller and the inner spiral impeller have the same propelling direction.

Compared with the prior art, the beneficial effects of the utility model are as follows:

1. the shortcoming of low dehydration efficiency of the centrifugal sludge dehydrator is overcome, negative pressure is introduced on the theoretical basis of the traditional centrifugal sludge dehydration, so that mud and water can be separated more quickly and efficiently under the dual actions of centrifugal force and negative pressure on the position where a mature solid ring layer is formed, and the sludge dehydration efficiency is improved.

2. The utility model discloses water and mud after the separation discharge through the route of difference, do not produce alternately, can not influence the centrifugal separation process, have certain promotion effect to the dehydration effect.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

In the figure: 1-rotating the drum; 2-a hollow rotating shaft; 201-rotating shaft mud feeding section; 202-rotating shaft water outlet section; 3-water outlet hollow pipe; 4-a mud feeding hollow pipe; 5-internal helical impeller; 6-a sludge outlet; 7-baffle plate; 8-inlet end holes; 9-outlet holes; 10-tapered closing in; 11-external spiral impeller.

Detailed Description

To facilitate understanding and practice of the invention by those of ordinary skill in the art, the following detailed description of the invention is provided in connection with the examples, and it is to be understood that the examples described herein are for purposes of illustration and explanation only and are not intended to limit the invention.

As shown in fig. 1, a sludge dewatering device comprises a rotating drum 1, wherein a tapered closing-in 10 is arranged on the rotating drum 1, a hollow rotating shaft 2 is arranged in the rotating drum 1, an outer spiral impeller 11 is arranged outside the hollow rotating shaft 2, the hollow rotating shaft 2 is separated by a partition plate 7, the parts of the hollow rotating shaft 2, which are positioned at two sides of the partition plate 7, are a rotating shaft sludge inlet section 201 and a rotating shaft water outlet section 202 respectively, a sludge inlet hole 8 is formed in the rotating shaft sludge inlet section 201, a sludge outlet hole 9 is formed in the rotating shaft water outlet section 202, an inner spiral impeller 5 is arranged on the inner wall of the rotating shaft water outlet section 202, a sludge inlet hollow pipe 4 penetrates through the rotating drum 1 to be communicated with the rotating shaft sludge inlet section 201, the tapered closing-in 10 is extended.

The rotary drum 1 is cylindrical, one end of the rotary drum 1 is a closed end, the other end of the rotary drum 1 is provided with a conical closing-in 10, and the mud feeding hollow pipe 4 penetrates through the closed end of the rotary drum 1 and is communicated with the mud feeding section 201 of the rotary shaft.

The hollow rotating shaft 2 is collinear with the central shaft of the rotary drum 1.

The ratio of the length to the diameter of the rotating drum 1 is greater than or equal to 2.5.

The taper angle of the tapered closing-in 10 is 8-12 degrees.

The outer helical impeller 11 and the inner helical impeller 5 have the same propelling direction.

The size of the rotary drum 1 is determined according to the sludge treatment amount, and the length of the rotary drum 1 is 2.5-3.5 times of the diameter.

The rotary drum 1, the hollow rotary shaft 2, the water outlet hollow pipe 3, the mud inlet hollow pipe 4, the external spiral impeller 11, the internal spiral impeller 5, the baffle 7 and the tapered closing-in 10 are all made of stainless steel materials.

The clearance between the water outlet section 202 of the rotating shaft and the tapered closing-in 10 is a sludge outlet 6.

The inner helical impeller 5 for generating negative pressure may be replaced by a pump or the like.

The utility model discloses a use as follows:

the utility model discloses when using, mud enters into the pivot by advancing mud hollow tube 4 and advances in mud section 201, and driving motor drives hollow shaft 2 rotatoryly, and under the effect of centrifugal force, mud in the mud section 201 is advanced in the pivot enters into rotary drum 1 and advances the region between mud hollow tube 4 through inlet end hole 8, and water and mud carry out preliminary separation under the centrifugal force effect, form solid ring layer and liquid ring layer, under the constantly propulsion of outer spiral impeller 11, solid ring layer mud is ripe gradually. Because the inner spiral impeller 5 and the outer spiral impeller 11 have the same propelling direction, when the pushing action of the outer spiral impeller 11 pushes the liquid ring layer and the solid ring layer to the outlet hole 9 on the water outlet section 202 of the rotating shaft, the negative pressure generated by the inner spiral impeller 5 acts on the liquid ring layer in the solid ring layer through the outlet hole 9, so that the liquid ring layer is further stripped from the solid ring layer. The inner spiral impeller 5 and the outer spiral impeller 11 are coaxial, the higher the rotating speed of the hollow rotating shaft 2 is, the better the preliminary separation effect of mud and water is, namely, the better the molding effect of the solid ring layer and the liquid ring layer is, and meanwhile, the stronger the negative pressure generated by the inner spiral impeller 5 is, the better the stripping effect of the liquid ring layer from the solid ring layer is. The mud in the solid ring layer is pushed by the outer spiral impeller 11 to the mud outlet 6, the discharged mud cake can be transported and disposed, and the water in the liquid ring layer enters the rotating shaft water outlet section 202 from the outlet end hole 9 on the rotating shaft water outlet section 202 under the action of the negative pressure of the inner spiral impeller 5 and is finally discharged through the water outlet hollow pipe 3.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein will be apparent to those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. The sludge dewatering device comprises a rotary drum (1) and is characterized in that a conical closing-in opening (10) is arranged on the rotary drum (1), a hollow rotary shaft (2) is arranged in the rotary drum (1), an outer spiral impeller (11) is arranged outside the hollow rotary shaft (2), the hollow rotary shaft (2) is separated by a partition plate (7), the parts, located on two sides of the partition plate (7), of the hollow rotary shaft (2) are a rotary shaft sludge inlet section (201) and a rotary shaft water outlet section (202), a sludge inlet hole (8) is formed in the rotary shaft sludge inlet section (201), a sludge outlet hole (9) is formed in the rotary shaft water outlet section (202), an inner spiral impeller (5) is arranged on the inner wall of the rotary shaft water outlet section (202), a sludge inlet hollow pipe (4) penetrates through the rotary drum (1) and is communicated with the rotary shaft sludge inlet section (201), the end of the rotary shaft water outlet section (202) extends out of the conical closing-in opening.

2. The sludge dewatering device according to claim 1, wherein the drum (1) is cylindrical, one end of the drum (1) is a closed end, the other end of the drum is provided with a tapered closing-in (10), and the sludge feeding hollow pipe (4) penetrates through the closed end of the drum (1) and is communicated with the rotating shaft sludge feeding section (201).

3. A sludge dewatering apparatus according to claim 2, characterized in that the hollow shaft (2) is co-linear with the central axis of the drum (1).

4. A sludge dewatering apparatus according to claim 2, characterized in that the ratio of the length to the diameter of the drum (1) is 2.5 or more.

5. A sludge dewatering apparatus according to claim 2, characterized in that the cone angle of the conical closure (10) is 8 ° to 12 °.

6. A sludge dewatering apparatus according to claim 2, characterized in that the outer helical impeller (11) and the inner helical impeller (5) are propelled in the same direction.