CN116021823A

CN116021823A - Solid-liquid separation equipment for mixing wet materials

Info

Publication number: CN116021823A
Application number: CN202211582122.7A
Authority: CN
Inventors: 赵永峰; 余志敏
Original assignee: Beijing Huanqing Environmental Technology Co ltd
Current assignee: Beijing Huanqing Environmental Technology Co ltd
Priority date: 2022-12-08
Filing date: 2022-12-08
Publication date: 2023-04-28

Abstract

The invention provides solid-liquid separation equipment for mixing wet materials, which comprises a shell, a first screen drum and a first spiral propeller, wherein the first spiral propeller is arranged on the shell; the first screen cylinder is fixedly arranged in the shell and is a cylinder body with two open ends, one open end is large, the other open end is small, the opening is large, and the other side is a discharge hole; the first helical blade of the first screw propeller is matched with the shape of the first screen drum and is used for conveying the first screen drum material from the feed inlet to the discharge outlet. According to the solid-liquid separation equipment for mixing wet materials, disclosed by the invention, the materials are extruded and dried by adopting the spiral blades matched with the first sieve cylinder with the large inlet and the small outlet, so that the dehydration of the colloid-containing materials can be effectively reduced; and based on the first screen cylinder and the second screen cylinder matching structure, the inside and outside reverse rotation and differential rotation not only give consideration to the dehydration problem of strong colloid viscosity and large molecular group volume, but also increase friction and disturbance on materials by matching the pore sizes of the first screen cylinder and the second screen cylinder, thereby solving the difficult problem that water is adsorbed on fibrous substances and colloid and is difficult to separate.

Description

Solid-liquid separation equipment for mixing wet materials

Technical Field

The invention relates to the field of environmental protection equipment, in particular to solid-liquid separation equipment for mixing wet materials.

Background

The water content of the product obtained by carrying out hydrothermal pyrolysis by taking straw and fecal sewage as raw materials is about 78-85%, and the water permeable hole aperture of the general dehydration part of the existing device is smaller (such as most 0.5-2.0 mm) because of the rich fibrous substances and colloid substances, so that mechanical dehydration is difficult, a large amount of colloid can block the tiny water permeable hole, and the solid-liquid separation dehydration cannot be carried out due to the blockage of the material; if the diameter of the water permeable holes is simply increased to 2.0-4.0mm or even larger, a large amount of non-dehydrated materials can be directly penetrated from the water permeable holes, so that the dehydration process is ineffective. Aiming at how to effectively dehydrate the materials and avoid blocking sieve holes, the solution is needed.

Disclosure of Invention

In order to solve the problems in the background art, the invention provides solid-liquid separation equipment for mixing wet materials, which comprises a shell, a first screen drum and a first spiral propeller; the first screen cylinder is fixedly arranged in the shell and is a cylinder body with two open ends, one open end is large, the other open end is small, the opening is large, and the other side is a discharge hole; the first spiral blade of the first spiral propeller is matched with the shape of the first screen drum and is used for conveying the first screen drum material from the feed inlet to the discharge outlet.

In the solid-liquid separation equipment for mixing wet materials, the first screen cylinder is of a cone frustum structure, and the vertex angle is 30-50 degrees; the first helical blade is a tapered helical blade.

In the solid-liquid separation equipment for mixing wet materials, the included angle between the blades of the first spiral blade and the rotation axis is A, and A is more than or equal to 30 degrees and less than or equal to 60 degrees

In the solid-liquid separation equipment of mixed wet material of this application, solid-liquid separation equipment still includes first inlet pipe, first inlet pipe one end is located the shell outside, and is the feed side, the other end intercommunication first screen drum, and be the ejection of compact side.

In the solid-liquid separation equipment for mixing wet materials, the solid-liquid separation equipment further comprises a first discharging pipe; one end of the first discharging pipe is communicated with the discharging hole, and the other end of the first discharging pipe is positioned outside the shell and is a discharging side.

In the solid-liquid separation device for mixing wet materials of the present application, the first screw propeller further comprises a first driving device for driving the screw blade to rotate.

In the solid-liquid separation equipment for mixing wet materials, the solid-liquid separation equipment further comprises a second screen drum, a second driving device and a second spiral blade; the second screen cylinder is rotatably arranged on the shell and sleeved on the outer side of the first screen cylinder; the second driving device is used for driving the second screen drum to rotate; the second helical blade is shaftless helical blade, and set firmly in the second screen cylinder inner wall.

In the solid-liquid separation equipment for mixing wet materials, the included angle between the blades of the second spiral blade and the rotation axis is B, and A is more than or equal to 60 degrees and less than or equal to 85 degrees.

In the solid-liquid separation equipment for mixing wet materials, the first screen drum is of a cone structure, the outer edge of the second spiral blade is far away from the outer wall of the first screen drum, the minimum vertical distance is L, and the L is gradually increased from the side of the discharge hole to the side of the feed inlet.

In the solid-liquid separation equipment for mixing wet materials, the maximum value in L is L ₁ Minimum value is L ₂ ，L ₁ ＝(1.5-3)L ₂ 。

The beneficial effects of the invention are as follows: according to the solid-liquid separation equipment for mixing wet materials, disclosed by the invention, the materials are extruded and dried by adopting the spiral blades matched with the first sieve cylinder with the large inlet and the small outlet, so that the dehydration of the colloid-containing materials can be effectively reduced; and based on the first screen cylinder and the second screen cylinder matching structure, the inside and outside reverse rotation and differential rotation not only give consideration to the dehydration problem of strong colloid viscosity and large molecular group volume, but also increase friction and disturbance on materials by matching the pore sizes of the first screen cylinder and the second screen cylinder, thereby solving the difficult problem that water is adsorbed on fibrous substances and colloid and is difficult to separate.

Drawings

FIG. 1 is a schematic diagram of a solid-liquid separation apparatus for mixing wet materials according to the present invention;

FIG. 2 is a cross-sectional view of a first screw blade of the wet material mixing solid-liquid separation apparatus of the present invention.

FIG. 8, a solid-liquid separation device; 81. a housing; 82. a first screen drum; 821. a feed inlet; 822. a discharge port; 83. a first auger; 831. a first helical blade; 832. a first driving device; 84. a first feed tube; 85. a first discharge pipe; 86. a second screen drum; 87. a second driving device; 88. a second helical blade; 89. and a material collecting groove.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description of the applications herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description and claims of the present application and in the description of the figures above are intended to cover non-exclusive inclusions.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

A solid-liquid separation apparatus for mixing wet materials according to the present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1, a solid-liquid separation device for mixing wet materials comprises a shell 81, a first screen drum 82 (screens with different apertures can be selected according to requirements, preferably, the screen aperture diameter is 3-6mm, the materials pass through the holes with 3-6mm under the action of pressure, the undersize materials cannot pass through smoothly to cause blockage, the oversized materials cannot form pressure difference to cause ineffective dehydration), and a first screw propeller 83; the first screen drum 82 is fixedly arranged in the shell 81, is a cylinder with two open ends, has a large opening at one end and a small opening at the other end, is a feed inlet 821 and a discharge outlet 822 at the other side; the first screw blade 831 (e.g., an axial belt screw blade) of the first screw propeller 83 is adapted to the shape of the first screen drum 82, and is used for conveying the material of the first screen drum 82 from the feed inlet 821 to the discharge outlet 822 (the first screw propeller 83 further comprises a first driving device 832 (e.g., a motor drives a decelerator, which drives the first screw blade 831 to rotate), and the first driving device is used for driving the screw blade 831 to rotate); a liquid outlet is arranged at the bottom of the shell 81, and a plurality of liquid collecting chambers can be arranged to collect the discharged liquid; based on the fact that the first screen drum is large in one end opening and small in one end opening, namely, the first spiral propeller 83 (the rotating speed is 3-12rpm, the material residence time is too short due to the too high rotating speed, the dehydration effect is reduced, and the processing amount is reduced due to the too low rotating speed), when the material is output from the discharge port 812, the material needs to be extruded and dried, and therefore the drying effect of the material is improved.

According to the solid-liquid separation equipment for mixing wet materials, disclosed by the invention, the materials are extruded and dried by adopting the spiral blades matched with the first sieve barrel with the large inlet and the small outlet, so that the dehydration of colloid-containing materials can be effectively reduced, and the water content of outlet solid materials can be reduced to 45-55%.

In some embodiments, as shown in fig. 1, the first screen cylinder 82 is in a cone frustum structure, the vertex angle D is 30-50 °, and the cone-based first screen cylinder 82 is matched with the conical spiral blade of the first spiral blade 831, so that the materials in the cylinder are continuously extruded and dehydrated (the extrusion force of the cylindrical cylinder cone cylinder on the materials is larger, the moisture removal is facilitated), the volume of the materials is reduced along with the extrusion of the moisture, the volume of the materials is also reduced along with the forward conveying of the materials to the first screen cylinder 82, so that the materials are continuously extruded, and the dehydration and drying effect is ensured (a mode of improving the extrusion force (selecting a motor with higher power) is generally adopted when the conventional cylindrical cylinder is extruded), so that when similar colloid-contained materials are processed, the water in the materials cannot be separated, but colloid particles are crushed into small particles, and how solid materials and liquid are not separated, and solid-liquid separation cannot be realized due to the fact that the size is reduced and flows out directly from the sieve holes; the vertex angle D is selected to be within the range of 30-50 degrees, the material is difficult to extrude and push due to the fact that the vertex angle D is lower than 30 degrees, the processing amount of the material is reduced, the first screen drum is easy to damage or the motor of the first screw propeller 83 is easy to burn, and when the vertex angle D is higher than 50 degrees, the drying effect is improved obviously compared with that of a cylindrical drum. Preferably, the rotation speed and the vertex angle D of the first screw propeller 83 are 30-50 degrees, so that the dehydration effect and the treatment capacity are ensured, and the service life of the equipment (such as a rotating shaft h and a motor) is also ensured.

Preferably, the first helical blade 831 is located a minimum vertical distance H from the first screen cylinder 82 of 13-33mm. The size of the material rich in colloid is mostly less than 10mm, and the range can ensure the material to pass through and dehydrate under the action of larger friction force. Smaller than this size will cause the material to become stuck in the interlayer; larger than this size may seriously affect the dewatering effect.

In some embodiments, as shown in fig. 1 and 2, the included angle between the blade of the first spiral blade 831 and the rotation axis is A, and is more than or equal to 30 degrees and less than or equal to 60 degrees, so that the stay time of the material in the first screen drum is ensured within the range, and the dehydration effect can be improved; the material residence time below 30 degrees is too short, and the dehydration is insufficient; and the temperature is higher than 60 degrees, so that the discharging is difficult, and the load of a motor is increased. Preferably, the water content can be reduced from 78-85% to 45-55% by matching the angle D of the vertex angle of the first screen drum of 30-50 degrees, and the water content of the material after extrusion dehydration of a conventional cylinder for treating the same material is 60-65%. The pitch can be selected to be 0.5-1.0 times of the height of the blade, so that the treatment capacity and the dewatering effect are ensured.

In some embodiments, as shown in fig. 1, the solid-liquid separation apparatus 8 further includes a first feed pipe 84, one end of the first feed pipe 84 is located outside the housing 81 and is a feed side, and the other end is communicated with the first screen drum 82 and is a discharge side. Preferably, the discharge side of the first feed tube 84 is in abutting engagement with the inlet 821.

In some embodiments, as shown in fig. 1, the solid liquid separation device 8 further comprises a first discharge pipe 85; one end of the first discharging pipe 85 is communicated with the discharging hole 822, and the other end of the first discharging pipe is positioned outside the shell 81 and is a discharging side. The first discharge pipe 85 is fixedly connected with the discharge hole 822 in a butt joint mode.

In some embodiments, as shown in fig. 1, the pre-drying apparatus 8 further comprises a second screen drum 86 (screen diameter 1-3mm, material size 0.1-1.0mm after the first screen drum 82, screen size selected to create an effective pressure differential that does not clog the screen, but also dewaters); the second screen drum 86 is rotatably disposed on the housing 81 (opposite to the rotation direction of the first screw 83 to effectively increase friction and improve dewatering efficiency); specifically, the end is in sealing connection with the housing and sleeved outside the first screen drum 82; the second driving device 87 is used for driving the second screen drum 86 to rotate; the second helical blade 88 is a shaftless helical blade, such as a ribbon helical blade; and is fixedly arranged on the inner wall of the second screen drum 86; based on the matching structure of the first screen drum and the second screen drum, the inside and outside reverse rotation and differential rotation are adopted, so that the problems of strong colloid viscosity and large molecular group volume are solved, friction and disturbance on materials are increased by matching the aperture sizes of the first screen drum and the second screen drum, the difficult problem that water is adsorbed on fibrous materials and colloids and is difficult to separate is solved, the second screen drum 86 is arranged, the materials screened out of the first screen drum 82 are subjected to secondary treatment, the yield of solid materials in the materials (generally, the water content of the materials screened out of the first screen drum 82 is about 75 percent, the water content of the materials screened out of the second screen drum is about 60-62 percent, and the water content of the materials screened out of the second screen drum is about 55 percent), and preferably, the speed of the second screen drum is 1.0-2.0 times that of the first drum, so that effective dehydration can be carried out.

Preferably, the included angle between the blades of the second spiral blade 88 and the rotation axis is B, and B is more than or equal to 60 degrees and less than or equal to 85 degrees, and the water content in the material can be reduced to 60-65% when the material is used in a cone structure by matching with the first screen drum in the range; the material with the angle of more than 85 degrees is difficult to advance, so that the load of the second driving device 87 is increased, the energy consumption is increased, but the dehydration efficiency is not obviously increased, and the material with the angle of less than 60 degrees stays in the cylinder too short, so that the dehydration effect is reduced. Especially, the effect of improving the dewatering and drying effect and ensuring the treatment capacity and the solid material yield can be achieved by being matched with the use of the first spiral blade 831 with the blade and the rotation axis of which the included angle A is more than or equal to 30 degrees and less than or equal to 60 degrees and the vertex angle D of the first screen drum is 30-50 degrees; when the B is 65 degrees and the D is 45 degrees, the optimal dehydration effect can be obtained, and the water content of the discharged material of the second screen drum 86 can reach 50-52%; the pitch n= (1.0-1.2) Z, n1= (1.0-1.2) Z1 of the specific first helical blade 831; and so on.

In some embodiments, as shown in FIG. 1, the first screen drum 82 has a conical structure, the second helical blades 88 have a minimum vertical distance L from the outer wall of the first screen drum 82 (specifically L is 10-30mm. The size of the colloid-rich material is mostly less than 10mm, which can ensure the material to pass through and dehydrate under the action of large friction force, and less than this size can cause the material to be clamped in the interlayer, and more than this size can seriously affect the dehydration effect.) L gradually increases from the side of the discharge port 812 to the side of the feed port 811; the clearance between the outer edge of the second spiral vane 88 and the outer wall of the first screen cylinder 82 is used for facilitating the normal rotation of the second screen cylinder 86 and avoiding the blocking phenomenon. Maximum value in L is L ₁ Minimum value is L ₂ ，L ₁ ＝1.5-3L ₂ 。

In some embodiments, as shown in fig. 1, the second screen drum 86 is a cylinder, and the second spiral vane 88, the second screen drum 86, the first screen drum 82 and the first spiral vane 831 are coaxially arranged, the second screen drum 86 has an annular outlet 821 from a portion between the second screen drum 86 and the first screen drum 82 located on the side of the feed inlet 811, and the corresponding solid-liquid separation apparatus 8 further includes a collecting tank 89; the collecting groove 89 is an annular groove matched with the annular outlet 821, is fixedly arranged on the shell 81 and is used for collecting materials output by the annular outlet 821, and the bottom is provided with a second discharge hole 891.

Claims

1. A solid-liquid separation device (8) for mixing wet materials, characterized by comprising a shell (81), a first screen drum (82) and a first screw propeller (83);

the first screen cylinder (82) is fixedly arranged in the shell (81) and is a cylinder with two open ends, one open end is large, the other open end is small, the opening is large and is a feed inlet (821), and the other side is a discharge outlet (822);

the first spiral blades (831) of the first spiral propeller (83) are matched with the shape of the first screen drum (82) and are used for conveying the material of the first screen drum (82) from the feed inlet (821) to the discharge outlet (822).

2. The solid-liquid separation equipment (8) for mixing wet materials according to claim 1, wherein the first screen cylinder (82) is of a truncated cone structure, and the apex angle is 30-50 °; the first helical blade (831) is a tapered helical blade.

3. The solid-liquid separation apparatus (8) for mixing wet materials according to claim 1, wherein the angle of the blades of the first spiral blade (831) to the rotation axis is a,30 ° or more a or less 60 °.

4. The solid-liquid separation device (8) for mixing wet materials according to claim 1, wherein the solid-liquid separation device (8) further comprises a first feeding pipe (84), one end of the first feeding pipe (84) is located outside the shell (81), is a feeding side, and the other end is communicated with the first screen drum (82), and is a discharging side.

5. The solid-liquid separation device (8) for mixing wet materials according to claim 1, characterized in that the solid-liquid separation device (8) further comprises a first discharge pipe (85);

one end of the first discharging pipe (85) is communicated with the discharging hole (822), and the other end of the first discharging pipe is positioned outside the shell (81) and is a discharging side.

6. Solid-liquid separation plant (8) for mixing wet materials according to claim 1, characterized in that the first screw propeller (83) further comprises a first driving means (832) for driving the screw blade (831) in rotation.

7. The solid-liquid separation apparatus (8) for mixing wet materials according to claim 1, wherein the solid-liquid separation apparatus (8) further comprises a second screen drum (86), a second driving device (87) and a second helical blade (88);

the second screen cylinder (86) is rotatably arranged on the shell (81) and sleeved outside the first screen cylinder (82);

the second driving device (87) is used for driving the second screen drum (86) to rotate;

the second spiral blade (88) is a shaftless spiral blade and is fixedly arranged on the inner wall of the second screen drum (86).

8. Solid-liquid separation apparatus (8) for mixed wet materials according to claim 7, characterized in that the angle between the blades of said second helical blade (88) and the rotation axis is B,60 ° or more a or less than 85 °.

9. The solid-liquid separation equipment (8) for mixing wet materials according to claim 1, wherein the first screen drum (82) has a cone structure, the minimum vertical distance from the outer edge of the second spiral vane (88) to the outer wall of the first screen drum (82) is L, and the L gradually increases from the discharge port (812) side to the feed port (811) side.

10. Solid-liquid separation plant (8) for mixing wet materials according to claim 9, characterized in that the maximum value in L is L ₁ Minimum value is L ₂ ，L ₁ ＝(1.5-3)L ₂ 。