CN111423088A - Filtering and dehydrating device and dehydrating method - Google Patents
Filtering and dehydrating device and dehydrating method Download PDFInfo
- Publication number
- CN111423088A CN111423088A CN202010245728.6A CN202010245728A CN111423088A CN 111423088 A CN111423088 A CN 111423088A CN 202010245728 A CN202010245728 A CN 202010245728A CN 111423088 A CN111423088 A CN 111423088A
- Authority
- CN
- China
- Prior art keywords
- cylinder
- water
- pipe
- dehydration
- sludge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000001914 filtration Methods 0.000 title claims abstract description 99
- 238000000034 method Methods 0.000 title claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 171
- 239000010802 sludge Substances 0.000 claims abstract description 116
- 230000018044 dehydration Effects 0.000 claims abstract description 72
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 72
- 239000000463 material Substances 0.000 claims abstract description 72
- 238000007599 discharging Methods 0.000 claims abstract description 52
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 18
- 230000002093 peripheral effect Effects 0.000 claims description 25
- 238000011010 flushing procedure Methods 0.000 claims description 11
- 230000005484 gravity Effects 0.000 claims description 7
- 239000012466 permeate Substances 0.000 claims description 3
- 239000010865 sewage Substances 0.000 description 6
- 238000001035 drying Methods 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000005469 granulation Methods 0.000 description 2
- 230000003179 granulation Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/125—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using screw filters
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a filtering and dehydrating device and a dehydrating method, and belongs to the technical field of sludge dehydration. The filtering and dehydrating device comprises a frame, a dehydrating main body and a water filtering cylinder; the dehydration main body comprises a dehydration cylinder body, a dehydration rotating shaft and a driving motor; the dehydration cylinder comprises a feeding cylinder, a material moving cylinder and a discharging cylinder; the feeding cylinder comprises a feeding pipe and a first filter pipe; the material moving cylinder comprises a material moving inner cylinder and a material moving outer cylinder, the material moving inner cylinder and the material moving outer cylinder surround to form an air cavity, the material moving inner cylinder is provided with water filtering holes, the material moving inner cylinder is coated with a second filter screen, and the material moving outer cylinder is provided with a vacuum suction pipe and a second water filtering pipe; the dehydration rotating shaft is provided with a helical blade; the driving motor is connected with the dehydration rotating shaft through a speed reducer; the water filtering cylinder body is connected with the first water filtering pipe and the second water filtering pipe. The invention adopts a sectional filtration dehydration mode to filter and dehydrate the sludge, can improve the removal of free water and capillary water in the sludge and improve the dehydration rate of the sludge.
Description
Technical Field
The invention belongs to the technical field of sludge dewatering, and particularly relates to a filtering and dewatering device and a dewatering method.
Background
The sludge is a necessary product in the sewage treatment process, the sludge generated by sewage treatment has high water content, and after the sludge which is not well treated enters the environment, secondary pollution can be directly brought to water and atmosphere, thus forming a serious threat to the ecological environment and human activities. Therefore, the treatment of the sludge should be careful, and the current sludge treatment is mainly divided into sludge dehydration and sludge drying.
Sludge dewatering is a sludge treatment method which removes water from fluid primary, concentrated or digested sludge and converts the sludge into semi-solid or solid sludge. After dehydration, the water content in the sludge can be reduced to fifty-five percent to eighty percent. The sludge dewatering method mainly comprises a natural drying method, a mechanical dewatering method and a granulation method.
At present, the common mechanical dehydration method mainly utilizes a porous filter medium to intercept solid particles in sludge so as to realize the purpose of solid-liquid separation. Most of the free water in the sludge can be removed by filtration or extrusion, but the capillary pores of the sludge also contain a large amount of capillary water which is difficult to remove.
Inner cylinder of the invention
The purpose of the invention is as follows: provides a filtering and dehydrating device and a dehydrating method, which are used for solving the problems in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme:
a filter dewatering device comprising: the device comprises a frame, a dewatering main body obliquely arranged on the frame and a water filtering cylinder fixedly connected with the dewatering main body; the dehydration main body comprises a dehydration cylinder body, a dehydration rotating shaft inserted in the dehydration cylinder body and a driving motor for driving the dehydration rotating shaft to rotate; the dehydration cylinder body comprises a feeding cylinder body, a material moving cylinder body and a discharging cylinder body from bottom to top respectively; the feeding barrel comprises a feeding pipe and a first water filter pipe, the top of the first water filter pipe is fixedly connected with the outer wall of the peripheral surface of the feeding barrel, and a first filter screen is arranged at the joint of the first water filter pipe and the feeding barrel; the discharging cylinder is provided with a discharging inclined plate; the dehydration rotating shaft is coaxial with the dehydration barrel, two ends of the dehydration rotating shaft are respectively and rotatably connected with the end part of the feeding barrel and the end part of the discharging barrel, and the dehydration rotating shaft is provided with a helical blade; the driving motor is fixedly connected with the speed reducer, the output end of the speed reducer is fixedly connected with the end part of the dehydration rotating shaft extending out of the discharging cylinder, and the shell of the speed reducer is fixedly connected with the end part of the discharging cylinder; the bottom end of the water filtering cylinder body is fixedly connected with the bottom end of the first water filtering pipe, and a water filtering outlet is formed in the bottom end of the water filtering cylinder body.
In a further embodiment, the material moving cylinder comprises a material moving inner cylinder and a material moving outer cylinder, the material moving inner cylinder and the material moving outer cylinder surround to form an air cavity, the peripheral wall of the material moving inner cylinder is provided with a plurality of water filtering holes, the peripheral outer wall of the material moving inner cylinder is coated with a second filter screen, the peripheral wall of the material moving outer cylinder is respectively provided with a vacuum suction pipe and a second water filtering pipe, the top of the second water filtering pipe is fixedly connected with one end, close to the bottom, of the peripheral wall of the material moving outer cylinder, and the vacuum suction pipe and the second water filtering pipe are communicated with the air cavity; the bottom end of the second water filtering pipe is fixedly connected with the water filtering cylinder body; inhale the air cavity through the vacuum suction pipe, form the negative pressure in the air cavity, move the pressure in the material inner tube great, free water and capillary water in the mud are inhaled the air cavity through the drainage hole, and the second filter screen filters the moisture of inhaling, and the water that the air cavity is gathered flows into the drainage barrel through the second drainage pipe to improve the dehydration rate of mud.
In a further embodiment, the diameter of the end part of the water filtering hole close to the inner wall of the peripheral surface of the material moving inner cylinder is smaller than that of the end part of the water filtering hole close to the outer wall of the peripheral surface of the material moving inner cylinder; the risk of sludge entering the water filtering holes is reduced by the arrangement.
In a further embodiment, the sponge is filled in the water filtering holes, the sponge has excellent water absorption performance, and meanwhile, the sludge can be further blocked, and the dehydration rate of the sludge is improved.
In a further embodiment, the dewatering rotating shaft comprises a first shaft part positioned in the dewatering cylinder and a second shaft part extending out of the dewatering cylinder, the first shaft part is of a conical structure, and the diameter of one end, close to the feeding cylinder, of the first shaft part is smaller than that of one end, close to the discharging cylinder, of the first shaft part; the second shaft part is connected with a speed reducer; when the sludge moves from one end of the feeding cylinder to one end of the discharging cylinder, the space is gradually reduced to extrude the sludge, and part of free water and capillary water in the sludge are extruded out, so that the dehydration rate of the sludge is improved.
In a further embodiment, the dewatering cylinder further comprises a flush pipe and a drain pipe; the flushing pipe is fixedly connected with one end, close to the top, of the peripheral outer wall of the material moving outer cylinder, and the bottom end of the flushing pipe extends downwards and is connected with the peripheral wall of the material moving inner cylinder; the water discharging pipe is fixedly connected with one side, close to the bottom, of the end part of the feeding barrel, and a water discharging valve is arranged on the water discharging pipe; the dewatering rotating shaft, the helical blade and the material moving inner barrel are washed by injecting water through the flushing pipe, and the washed sewage is discharged through the drain pipe.
In a further embodiment, a barometer is connected to the vacuum suction tube, and the air pressure in the air cavity is monitored by the barometer.
In order to achieve the purpose, the invention provides the following technical scheme:
the dewatering method of the filtering dewatering device comprises the following steps
Step 1: injecting sludge into the feeding cylinder through the feeding pipe, wherein free water in the sludge downwards permeates through the first filter screen under the influence of self gravity and then enters the water filtering cylinder through the first filter screen;
step 2: the driving motor operates to drive the dehydration rotating shaft to rotate through the speed reducer, the spiral blade on the dehydration rotating shaft rotates to drive sludge to be transferred from one end of the feeding cylinder body obliquely upwards, in the sludge transfer process, the space between the spiral blade and the material transferring inner cylinder is gradually reduced to extrude the sludge, part of free water and capillary water in the sludge are extruded out, and the extruded water enters the air cavity after being filtered through the water filtering holes in the material transferring inner cylinder through the second filter screen;
and step 3: the air cavity is continuously sucked by the vacuum suction pipe, the air pressure in the air cavity is reduced to form negative pressure, the internal pressure of the material moving inner cylinder is greater than that of the air cavity, free water and capillary water in the sludge are further sucked into the air cavity through the water filtering holes, and the water in the air cavity enters the water filtering cylinder body through the second water filtering pipe;
and 4, step 4: the helical blade continues to rotate to transfer the dewatered mud blocks to the discharging cylinder, and the mud blocks of the discharging cylinder are discharged through the discharging inclined plate.
Has the advantages that: the sludge is filtered and dehydrated in a sectional filtering and dehydrating mode, and the sludge enters the feeding cylinder body and is filtered by the first filter screen to realize the preliminary separation of free water in the sludge; the dewatering rotating shaft drives the spiral blade to move the sludge into the material moving cylinder, and the sludge is extruded out by free water and capillary water at the extruded part in the material moving cylinder, and is collected in the air cavity after being filtered by the second filter screen; meanwhile, by vacuumizing the air cavity, capillary water in the sludge is further sucked into the air cavity, the dewatered sludge is discharged from the discharge cylinder, and the filtered water is collected through the water filtering cylinder. Compared with the prior art, the filtering and dehydrating device provided by the invention can improve the removal of free water and capillary water in the sludge and improve the dehydration rate of the sludge.
Drawings
FIG. 1 is a schematic view showing the construction of a filtration and dehydration apparatus according to the present invention.
Fig. 2 is a schematic structural view of a dewatering body and a water filtering cylinder body of the filtering and dewatering device of the invention.
Fig. 3 is a sectional view of a dewatering cylinder of the filtering dewatering device of the present invention.
Fig. 4 is a partial view of the invention at a of fig. 3.
Fig. 5 is a partial view of the invention at a of fig. 3.
FIG. 6 is a schematic view showing the construction of a dewatering spindle and a spiral blade of the filtration dewatering device of the present invention.
The reference signs are: the device comprises a frame 10, a support upright 11, a support body 12, a support cross bar 13, a dewatering body 20, a dewatering cylinder 21, a feeding cylinder 211, a feeding pipe 2111, a first filter pipe 2112, a first filter screen 2113, a material moving cylinder 212, a material moving inner cylinder 2121, a filter hole 21211, a material moving outer cylinder 2122, a vacuum suction pipe 21221, a second filter pipe 21222, an air cavity 2123, a second filter screen 2124, a sponge 2125, a discharging cylinder 213, a discharging inclined plate 2131, a flushing pipe 214, a drain pipe 215, a drain valve 2151, a dewatering rotating shaft 22, a first shaft 221, a second shaft 222, a driving motor 23, a spiral blade 24, a speed reducer 25, an air pressure gauge 26, a water filtering cylinder 30, a water filtering outlet 31 and a ferrule 32.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the invention.
Researches of researchers find that a large amount of sludge is generated in the sewage treatment process, the sludge contains a large amount of water, and if the sludge cannot be effectively treated, secondary pollution is brought to a water body and the atmosphere. The sludge treatment method mainly comprises sludge dehydration and sludge drying. Common sludge dewatering methods mainly include a natural drying method, a mechanical dewatering method and a granulation method, wherein the mechanical dewatering method mainly utilizes a porous filter medium to intercept solid particles in sludge so as to realize solid-liquid separation and remove most of free water in the sludge, but a large amount of capillary water in the sludge is difficult to remove, so that the dewatering rate of the sludge is low.
In order to solve the above problems, the present invention provides a filtering and dewatering device, as shown in fig. 1, including a frame 10, a dewatering body 20, and a water filtering cylinder 30.
Specifically, the frame 10 includes a support column 11 and a support body 12. The support columns 11 have four in total, two of the support columns are shorter in length, the other two support columns are longer in length, and the four support columns 11 are all vertically arranged. The support main body 12 is obliquely arranged, one end of the support main body 12 is welded and fixed with the two shorter support columns 11, and the other end of the support main body 12 is welded and fixed with the two longer support columns 11. The support body 12 is recessed downwardly along its length to form a semi-circular groove. In order to ensure the stability of the frame 10, two adjacent support columns 11 with different lengths are fixedly connected through a support cross rod 13. Meanwhile, in order to prevent the frame 10 from being corroded and rusted, the support columns 11, the support main body 12, and the support cross bar 13 are made of cast steel or stainless steel.
Referring to fig. 1 and 2, the dewatering main body 20 is disposed obliquely, and the dewatering main body 20 includes a dewatering cylinder 21, a dewatering rotating shaft 22, and a driving motor 23. Wherein, the dehydration cylinder 21 is obliquely arranged in the groove of the support main body 12, and the dehydration cylinder 21 is fixedly connected with the support main body 12. The dehydration cylinder 21 includes a feeding cylinder 211, a material moving cylinder 212, and a discharging cylinder 213 from bottom to top. The feed cylinder 211 includes a feed pipe 2111 for injecting sludge and a first filtered water pipe 2112 for collecting filtered water. The feed pipe 2111 is provided on the side of the peripheral wall of the feed cylinder 211 near the top. The top of the first water filtering cylinder is fixedly connected with one side of the peripheral wall of the feeding cylinder body 211 close to the bottom; a first filter screen 2113 is arranged at the joint of the first filter pipe 2112 and the second feeding cylinder 211. The material moving cylinder 212 is communicated with the material feeding cylinder 211, the material discharging cylinder 213 is communicated with the material moving cylinder 212, a material outlet (not shown in the figure) is arranged downwards on the peripheral wall of the material discharging cylinder 213, and a material discharging inclined plate 2131 is arranged on one side, close to the material outlet, of the peripheral wall of the material discharging cylinder 213. The dehydration rotating shaft 22 is inserted into the dehydration cylinder 21, specifically, the dehydration rotating shaft 22 and the dehydration cylinder 21 are coaxially arranged, two ends of the dehydration rotating shaft 22 are respectively rotatably connected with the end of the feeding cylinder 211 and the end of the discharging cylinder 213, the dehydration rotating shaft 22 is provided with a helical blade 24, and the end of the dehydration rotating shaft 22 close to the discharging cylinder 213 extends out of the discharging cylinder 213 from the inside of the discharging cylinder 213. The output shaft of the driving motor 23 is fixedly connected with the input end of the speed reducer 25, the shell of the driving motor 23 is fixedly connected with the shell of the speed reducer 25, the output end of the speed reducer 25 is fixedly connected with the end part of the dewatering rotating shaft 22 extending out of the discharging cylinder 213, and the shell of the speed reducer 25 is fixedly connected with the end part of the discharging cylinder 213.
Referring to fig. 1 and 2, the water filtering cylinder 30 is obliquely disposed below the dewatering body 20, and the bottom end of the first water filtering pipe 2112 extends downward and penetrates through the support body 12 to be fixedly connected to the water filtering cylinder 30. The bottom end of the water filtering cylinder 30 is provided with a filtered water outlet 31. The two ferrules 32 are sleeved on the outer wall of the circumferential surface of the water filtering cylinder 30, the two ferrules 32 are fixedly connected with the bottom of the support body 12, and the water filtering cylinder 30 and the support body 12 are fixed through the ferrules 32, so that the stability of the water filtering cylinder 30 is improved.
The sludge is driven by the helical blade 24 to move from the feeding cylinder 211 to the discharging cylinder 213 through the material moving cylinder 212, and in the process of the sludge helical ascending, the free water in the sludge is further separated from the sludge under the influence of self gravity and flows into the feeding cylinder 211 along the material moving cylinder 212. Although the dehydration rate of the sludge is improved, the dehydration mode mainly depends on self gravity is a passive dehydration mode, and a large amount of free water and capillary water in the sludge are not removed, so that the device is required to be improved if the dehydration rate of the sludge is further improved. Referring to fig. 3 and 4, the material moving cylinder 212 includes a material moving inner cylinder 2121 and a material moving outer cylinder 2122, which are coaxially disposed, the outer wall of the circumferential surface of the material moving inner cylinder 2121 and the inner wall of the circumferential surface of the material moving outer cylinder 2122 surround to form a closed air cavity 2123, and the material moving inner cylinder 2121 is communicated with the material feeding cylinder 211. The inner transferring cylinder 2121 has a plurality of water filtering holes 21211 on its circumferential wall, and the inner transferring cylinder 2121 has a second filter 2124 on its circumferential outer wall. A vacuum suction pipe 21221 and a second water filtering pipe 21222 are arranged on the circumferential wall of the material moving outer barrel 2122; the top of the second strainer 21222 is fixedly connected to the end of the peripheral wall of the material-moving outer cylinder 2122 close to the bottom, and the second strainer 21222 and the vacuum suction pipe 21221 are both communicated with the air chamber 2123. The bottom end of the second strainer 21222 extends downward and penetrates the support body 12 to be fixedly connected to the strainer body 30. The material moving inner cylinder 2121 is communicated with the feeding cylinder 211, and the material discharging cylinder 213 is communicated with the material moving inner cylinder 2121. The air cavity is sucked by a vacuum suction pipe, the air pressure in the air cavity 2123 is reduced to form negative pressure, and the pressure in the material moving inner cylinder 2121 is higher, so that free water and capillary water in the sludge are sucked into the air cavity 2123 through the water filtering holes 21211; the sucked free water and capillary water are filtered by the second filter 2124, and the water accumulated in the air chamber 2123 flows into the water filtering cylinder 30 through the second water filtering pipe 21222, thereby increasing the dehydration rate of the sludge. Meanwhile, in the process of spiral lifting of the sludge, free water removed by the self gravity can directly enter the air cavity 2123 through the water filtering holes 21211, so that the sludge is quickly separated from the free water, and the dehydration rate of the sludge is further improved.
During the long-term use of the dehydration device, the sludge block formed after the sludge dehydration is condensed in the dehydration cylinder 21 and on the dehydration rotating shaft 22 and the helical blade 24, and is difficult to clean. To solve this problem, referring to fig. 3, in a further embodiment, the dewatering cylinder 21 further includes a flushing pipe 214 and a drain pipe 215, the flushing pipe 214 is fixedly connected to one end of the outer peripheral wall of the material-moving outer cylinder 2122 near the top, the bottom end of the flushing pipe extends downward and is fixedly connected to the outer peripheral wall of the material-moving inner cylinder 2121, and the flushing pipe is communicated with the inside of the material-moving inner cylinder 2121. The water discharging pipe 215 is fixedly connected with one side, close to the bottom, of the end part of the feeding cylinder body 211, the water discharging pipe 215 is communicated with the inside of the feeding cylinder body 211, and the water discharging valve 2151 is arranged on the water discharging pipe 215. When the dewatering device needs to be cleaned, water is injected into the dewatering cylinder 21 through the flushing pipe 214 to flush the material moving inner cylinder 2121, the dewatering rotating shaft 22 and the helical blade 24, the flushed sewage is discharged through the water discharge pipe 215, and the water discharge valve 2151 is in an open state. When the dewatering device dewaters sludge, the drain valve 2151 is in a closed state.
During evacuation of the air chamber 2123, the pressure inside the air chamber 2123 is low, while the pressure inside the transfer inner barrel 2121 is high, so that free water and capillary water in the sludge are sucked into the air chamber 2123. However, in this process, since the sludge contains water, the sludge has a certain fluidity, and it is very easy for the sludge to be sucked into the drainage holes 21211, which may cause the drainage holes 21211 to be blocked, thereby reducing the dehydration rate of the sludge. In order to solve the problem, the water filtering holes 21211 in the present embodiment are designed to be smaller at one end and larger at the other end, and specifically, referring to fig. 4, the diameter of the end of the water filtering holes 21211 close to the inner wall of the material moving inner cylinder 2121 is smaller than the diameter of the end of the water filtering holes 21211 close to the outer wall of the material moving inner cylinder 2121, so that the sludge is difficult to enter the water filtering holes 21211, and even if some sludge enters the water filtering holes 21211, because the diameter of the end of the water filtering holes 21211 close to the outer wall of the material moving inner cylinder 2121 is larger, a larger accommodating space is provided in the water filtering holes 21211, the water filtering holes 21211 are not blocked, and.
In order to improve the dewatering efficiency of the sludge during the movement, in a further embodiment, in conjunction with fig. 5, a sponge 2125 is plugged into the drainage holes 21211; on the one hand, the sponge 2125 has good air permeability, so that the permeability of the drainage holes 21211 is not significantly reduced, thereby facilitating the suction of water in the sludge into the air cavity 2123 when the air cavity 2123 is sucked; on the other hand, the sponge 2125 has many fine pores, which is very beneficial to absorbing capillary water, so that the sponge 2125 has excellent water absorption performance, and can greatly improve the removal of the capillary water in the sludge, thereby further improving the dehydration rate of the sewage. Meanwhile, the sponge 2125 is filled in the water filtering holes 21211, so that the sludge can be blocked, and the risk of the sludge entering the water filtering holes 21211 is reduced.
After the sludge is primarily filtered and dehydrated in the feeding cylinder 211, a large amount of free water and capillary water still exist in the sludge. In order to further improve the dehydration rate of the sludge, referring to fig. 6, in a further embodiment, the dehydration rotation shaft 22 includes a first shaft portion 221 located inside the dehydration cylinder 21 and a second shaft portion 222 extending out of the dehydration cylinder 21, the first shaft portion 221 is of a conical structure, and the diameter of the end of the first shaft portion 221 close to the feeding cylinder 211 is smaller than the diameter of the end of the first shaft portion 221 close to the discharging cylinder 213; the second shaft portion 222 is connected to the speed reducer 25. In the rotation process of the dewatering rotating shaft 22, the helical blade 24 drives the sludge to move towards one end of the discharging cylinder 213, and since the diameter of the first shaft 221 of the dewatering rotating shaft 22 close to one end of the discharging cylinder 213 is larger, the space of the sludge in the moving process is gradually reduced to cause the sludge to be extruded, free water and capillary water in the sludge are extruded out and permeate into the water filtering holes 21211 to enter the air cavity 2123 after being filtered by the second filter screen 2124, and thus the dewatering rate of the sludge is further improved.
The working principle is as follows: sludge is injected into the feeding cylinder body 211 through the feeding pipe 2111, free water in the sludge is downward permeated under the influence of self gravity, primary filtration is completed through the first filter screen 2113, and the filtered water is filtered out of the cylinder body 30 through the first filter pipe 2112. Meanwhile, the driving motor 23 operates to drive the dewatering rotating shaft 22 to rotate through the speed reducer 25, the dewatering rotating shaft 22 rotates to drive the helical blade 24 to rotate to enable the sludge in the feeding cylinder 211 to move towards the material moving cylinder 212, the sludge moves upwards in an inclined mode due to the fact that the feeding cylinder 211 is arranged in an inclined mode, free water in the sludge is further seeped and separated under the influence of gravity in the sludge moving process, meanwhile, in the sludge moving process, the space between the helical blade 24 and the material moving inner cylinder 2121 is gradually reduced to achieve extrusion on the sludge, the free water and capillary water in the sludge are further squeezed out to achieve separation from the sludge, and the separated free water and the capillary water enter the air cavity 2123 after being filtered through the water filtering holes 21211 and the second filter screen 2124. In addition, during the movement of the sludge, the air chamber 2123 is sucked by the vacuum suction pipe 21221, the air pressure in the air chamber 2123 is small to form a negative pressure, the pressure in the material moving inner cylinder 2121 is higher than the pressure in the air chamber 2123, free water and capillary water in the sludge are sucked out and filtered by the water filtering holes 21211 and the second filter 2124, and then enter the air chamber 2123, and the water accumulated in the air chamber 2123 enters the water filtering cylinder 30 through the second water filtering pipe 21222. In order to monitor the air pressure in the air chamber 2123 during the sludge dewatering process, an air pressure gauge 26 is connected to the vacuum suction tube 21221, and since the vacuum suction tube 21221 is connected to the air chamber 2123, the air pressure in the air chamber 2123 can be obtained from the reading of the air pressure gauge 26. The dewatered sludge is coagulated into sludge blocks, the helical blades 24 continue to rotate to transfer the sludge blocks to the discharging cylinder 213, and the sludge blocks of the discharging cylinder 213 are discharged through the discharging inclined plate 2131.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the embodiments, and various equivalent changes can be made to the technical solution of the present invention within the technical idea of the present invention, and these equivalent changes are within the protection scope of the present invention.
Claims (8)
1. A filter dewatering apparatus, comprising: the device comprises a frame, a dewatering main body obliquely arranged on the frame and a water filtering cylinder fixedly connected with the dewatering main body; the dehydration main body comprises a dehydration cylinder body, a dehydration rotating shaft inserted in the dehydration cylinder body and a driving motor for driving the dehydration rotating shaft to rotate; the dehydration cylinder body comprises a feeding cylinder body, a material moving cylinder body and a discharging cylinder body from bottom to top respectively; the feeding barrel comprises a feeding pipe and a first water filter pipe, the top of the first water filter pipe is fixedly connected with the outer wall of the peripheral surface of the feeding barrel, and a first filter screen is arranged at the joint of the first water filter pipe and the feeding barrel; the discharging cylinder is provided with a discharging inclined plate; the dehydration rotating shaft is coaxial with the dehydration barrel, two ends of the dehydration rotating shaft are respectively and rotatably connected with the end part of the feeding barrel and the end part of the discharging barrel, and the dehydration rotating shaft is provided with a helical blade; the driving motor is fixedly connected with the speed reducer, the output end of the speed reducer is fixedly connected with the end part of the dehydration rotating shaft extending out of the discharging cylinder, and the shell of the speed reducer is fixedly connected with the end part of the discharging cylinder; the bottom end of the water filtering cylinder body is fixedly connected with the bottom end of the first water filtering pipe, and a water filtering outlet is formed in the bottom end of the water filtering cylinder body.
2. The filtration and dehydration device of claim 1, wherein the material-transferring cylinder comprises a material-transferring inner cylinder and a material-transferring outer cylinder, the material-transferring inner cylinder and the material-transferring outer cylinder surround to form an air cavity, the peripheral wall of the material-transferring inner cylinder is provided with a plurality of water filtering holes, the peripheral outer wall of the material-transferring inner cylinder is wrapped with a second filter screen, the peripheral wall of the material-transferring outer cylinder is respectively provided with a vacuum suction pipe and a second water filtering pipe, the top of the second water filtering pipe is fixedly connected with one end of the peripheral wall of the material-transferring outer cylinder close to the bottom, and the vacuum suction pipe and the second water filtering pipe are communicated with the air cavity; the bottom end of the second water filtering pipe is fixedly connected with the water filtering cylinder body.
3. The filtration and dehydration device of claim 2, wherein the diameter of the end part of the water filtering hole close to the inner wall of the peripheral surface of the material moving inner cylinder is smaller than that of the end part of the water filtering hole close to the outer wall of the peripheral surface of the material moving inner cylinder.
4. A filter-dewatering device according to claim 3, characterized in that the drainage holes are plugged with a sponge.
5. The filtration and dewatering apparatus according to claim 1, wherein the dewatering spindle includes a first shaft portion located inside the dewatering drum and a second shaft portion extending out of the dewatering drum, the first shaft portion is of a tapered configuration, and a diameter of an end of the first shaft portion adjacent to the feed drum is smaller than a diameter of an end of the first shaft portion adjacent to the discharge drum; the second shaft part is connected with a speed reducer.
6. The filter dewatering apparatus of claim 2, wherein the dewatering drum further comprises a flush pipe and a drain pipe; the flushing pipe is fixedly connected with one end, close to the top, of the peripheral outer wall of the material moving outer cylinder, and the bottom end of the flushing pipe extends downwards and is connected with the peripheral wall of the material moving inner cylinder; the water discharging pipe is fixedly connected with one side, close to the bottom, of the end part of the feeding barrel, and a water discharging valve is arranged on the water discharging pipe.
7. A filter-dewatering device according to claim 2, characterized in that a gas pressure gauge is connected to the vacuum suction tube.
8. The dewatering method of the filtering dewatering device is characterized by comprising the following steps
Step 1: injecting sludge into the feeding cylinder through the feeding pipe, wherein free water in the sludge downwards permeates through the first filter screen under the influence of self gravity and then enters the water filtering cylinder through the first filter screen;
step 2: the driving motor operates to drive the dehydration rotating shaft to rotate through the speed reducer, the spiral blade on the dehydration rotating shaft rotates to drive sludge to be transferred from one end of the feeding cylinder body obliquely upwards, in the sludge transfer process, the space between the spiral blade and the material transferring inner cylinder is gradually reduced to extrude the sludge, part of free water and capillary water in the sludge are extruded out, and the extruded water enters the air cavity after being filtered through the water filtering holes in the material transferring inner cylinder through the second filter screen;
and step 3: the air cavity is continuously sucked by the vacuum suction pipe, the air pressure in the air cavity is reduced to form negative pressure, the internal pressure of the material moving inner cylinder is greater than that of the air cavity, free water and capillary water in the sludge are further sucked into the air cavity through the water filtering holes, and the water in the air cavity enters the water filtering cylinder body through the second water filtering pipe;
and 4, step 4: the helical blade continues to rotate to transfer the dewatered mud blocks to the discharging cylinder, and the mud blocks of the discharging cylinder are discharged through the discharging inclined plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010245728.6A CN111423088A (en) | 2020-03-31 | 2020-03-31 | Filtering and dehydrating device and dehydrating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010245728.6A CN111423088A (en) | 2020-03-31 | 2020-03-31 | Filtering and dehydrating device and dehydrating method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111423088A true CN111423088A (en) | 2020-07-17 |
Family
ID=71556189
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010245728.6A Withdrawn CN111423088A (en) | 2020-03-31 | 2020-03-31 | Filtering and dehydrating device and dehydrating method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111423088A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112121506A (en) * | 2020-08-28 | 2020-12-25 | 中国建材国际工程集团有限公司 | A high-efficiency vacuum spiral dehydration and drug removal equipment |
| CN112121531A (en) * | 2020-09-23 | 2020-12-25 | 崔云华 | Classified recovery type sewage sludge filter-pressing system and treatment method thereof |
| CN112707621A (en) * | 2020-11-25 | 2021-04-27 | 国网河北省电力有限公司电力科学研究院 | Thermal power plant waste water treatment sludge concentration device |
| CN113998851A (en) * | 2021-11-23 | 2022-02-01 | 河海大学设计研究院有限公司 | Green cyclic utilization system of river silt |
| CN116871512A (en) * | 2023-05-31 | 2023-10-13 | 安徽旭晶粉体新材料科技有限公司 | A dehydration device for atomized copper powder processing |
| CN118830472A (en) * | 2024-08-01 | 2024-10-25 | 深圳市绿雅生态发展有限公司 | Water circulation irrigation system for landscaping maintenance |
| CN119390316A (en) * | 2024-12-12 | 2025-02-07 | 上海淮融科技有限公司 | A sludge concentration device |
| CN120864773A (en) * | 2025-09-17 | 2025-10-31 | 安徽省生态环境科学研究院(安徽省生态环境规划院、安徽省生态环境工程咨询设计院) | Recovered sludge filtering device and filtering method |
-
2020
- 2020-03-31 CN CN202010245728.6A patent/CN111423088A/en not_active Withdrawn
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112121506A (en) * | 2020-08-28 | 2020-12-25 | 中国建材国际工程集团有限公司 | A high-efficiency vacuum spiral dehydration and drug removal equipment |
| CN112121531A (en) * | 2020-09-23 | 2020-12-25 | 崔云华 | Classified recovery type sewage sludge filter-pressing system and treatment method thereof |
| CN112707621A (en) * | 2020-11-25 | 2021-04-27 | 国网河北省电力有限公司电力科学研究院 | Thermal power plant waste water treatment sludge concentration device |
| CN113998851A (en) * | 2021-11-23 | 2022-02-01 | 河海大学设计研究院有限公司 | Green cyclic utilization system of river silt |
| CN116871512A (en) * | 2023-05-31 | 2023-10-13 | 安徽旭晶粉体新材料科技有限公司 | A dehydration device for atomized copper powder processing |
| CN118830472A (en) * | 2024-08-01 | 2024-10-25 | 深圳市绿雅生态发展有限公司 | Water circulation irrigation system for landscaping maintenance |
| CN119390316A (en) * | 2024-12-12 | 2025-02-07 | 上海淮融科技有限公司 | A sludge concentration device |
| CN120864773A (en) * | 2025-09-17 | 2025-10-31 | 安徽省生态环境科学研究院(安徽省生态环境规划院、安徽省生态环境工程咨询设计院) | Recovered sludge filtering device and filtering method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN220432587U (en) | Sludge dewatering device for ecological management of water conservancy river channel | |
| CN217569189U (en) | Centrifugal dehydration device for earth excavation | |
| CN216863965U (en) | A filter device for sludge dewatering | |
| CN220834422U (en) | Negative pressure adsorption mechanism for sewage filtration treatment | |
| CN221412449U (en) | River sludge treatment device for municipal engineering | |
| CN112320985A (en) | Intelligent centralized treatment system for sewage station | |
| CN208594107U (en) | A kind of cleaning plant of sewage treatment settled sludge | |
| CN207546002U (en) | A kind of more medium filter | |
| JP3978661B2 (en) | Gravity concentration dehydrator | |
| CN206666355U (en) | One kind is used for chemical engineering sludge dehydration dispersing device | |
| CN111744255B (en) | Immersed disc slurry purification device | |
| CN211056841U (en) | Remove emergent rubbish penetrant treatment facility | |
| CN204434447U (en) | A kind of follow-on sludge vacuum dewatering unit | |
| CN108178483A (en) | Device for dehydrating sladge waste | |
| CN215209086U (en) | Sludge filter pressing device | |
| CN221999017U (en) | Filtering device for high-salt wastewater | |
| CN219539606U (en) | Sludge dewatering machine for dredging river channel | |
| CN205391851U (en) | Automatic excellent automatic pressure filter of performance | |
| CN218813419U (en) | A place belt cleaning device for mud is handled | |
| CN220666332U (en) | River channel dredging device | |
| CN116983745B (en) | Polycarboxylate water reducing agent preparation system of processing | |
| CN218686741U (en) | Breed concentrated machine of waste water pollutant | |
| CN221565950U (en) | Multistage filtering device for sewage treatment | |
| CN222305001U (en) | Ceramic disc vacuum filter | |
| CN223861413U (en) | A traditional Chinese medicine extract filtration and storage device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20200717 |