阅读说明：本技术 一种复合固液分离装置 (Composite solid-liquid separation device ) 是由 张凝 陈宣 于 2021-03-14 设计创作，主要内容包括：本发明公开了一种复合固液分离装置,包括挤压脱水装置和离心脱水装置。挤压脱水装置包括筒体、旋转轴,旋转轴上设置有若干叶片。筒体选用三套筒结构,包括固定式设置的内筒和外筒,以及旋转式设置的中筒。内筒和中筒均采用网状结构,且内筒网状结构孔径大于中筒网状结构。筒体内从里到外依次形成第一浆料通道、第二浆料通道和第一浆液通道。离心脱水装置包括固定式的外壳体和旋转套筒。旋转套筒包括内离心筒和外离心筒,均选用凹凸结构的离心网,且内离心筒的离心网孔径大于外离心筒的离心网孔径。内离心筒的转速小于外离心筒的转速。本发明通过设置挤压脱水和离心脱水两个串联环节,有效实现了水热裂解产物粘稠物料的高效固液分离。(The invention discloses a composite solid-liquid separation device which comprises an extrusion dehydration device and a centrifugal dehydration device. The extrusion dehydration device comprises a cylinder body and a rotating shaft, and a plurality of blades are arranged on the rotating shaft. The barrel adopts a three-sleeve structure and comprises an inner barrel and an outer barrel which are fixedly arranged and a middle barrel which is rotatably arranged. The inner cylinder and the middle cylinder both adopt a net structure, and the pore diameter of the net structure of the inner cylinder is larger than that of the net structure of the middle cylinder. A first slurry channel, a second slurry channel and a first slurry channel are sequentially formed in the cylinder from inside to outside. The centrifugal dewatering device comprises a fixed outer shell and a rotating sleeve. The rotating sleeve comprises an inner centrifugal cylinder and an outer centrifugal cylinder, wherein centrifugal nets with concave-convex structures are selected, and the aperture of the centrifugal net of the inner centrifugal cylinder is larger than that of the centrifugal net of the outer centrifugal cylinder. The rotating speed of the inner centrifugal cylinder is less than that of the outer centrifugal cylinder. According to the invention, two serial links of extrusion dehydration and centrifugal dehydration are arranged, so that efficient solid-liquid separation of a viscous material of a hydrothermal cracking product is effectively realized.)

1. The composite solid-liquid separation device is characterized by comprising an extrusion dehydration device (2) and centrifugal dehydrationThe device (3) comprises a cylinder body and a rotating shaft (202) arranged in the center of the cylinder body, wherein a plurality of blades are arranged on the rotating shaft (202); the barrel is of a three-sleeve structure, and the three-sleeve structure comprises an inner barrel (203) and an outer barrel (201) which are fixedly arranged and a middle barrel (204) which is rotatably arranged; the inner barrel (203) and the middle barrel (204) both adopt a net structure, and the apertures of the inner barrel and the middle barrel net structure are respectively Brownon_inAnd both_outBroadlay_in>ø_out(ii) a A first slurry channel (205) is formed at the tail end of the inner cylinder (203), a second slurry channel (206) is formed between the inner cylinder (203) and the middle cylinder (204), and a first slurry channel is formed between the middle cylinder (204) and the outer cylinder (201); the centrifugal dewatering device (3) comprises a fixed outer shell (301) and a rotating sleeve which is coaxially arranged with the outer shell (301), wherein the rotating sleeve comprises an inner centrifugal cylinder (303) and an outer centrifugal cylinder (302); the inner centrifugal cylinder (303) and the outer centrifugal cylinder (302) both adopt centrifugal nets, and the aperture of the inner centrifugal cylinder is larger than that of the outer centrifugal cylinder; and the outlet of the first slurry channel (205) is arranged at the top of the inner centrifugal cylinder (303), and the outlet of the second slurry channel is arranged at the top of the outer centrifugal cylinder (302).

2. The composite solid-liquid separation device of claim 1, wherein the centrifugal nets of the inner centrifugal cylinder (303) and the outer centrifugal cylinder (302) are both concave-convex structures.

3. The composite solid-liquid separation device according to claim 1, characterized in that the rotation speed of the inner centrifugal cylinder (303) is less than the rotation speed of the outer centrifugal cylinder (302).

4. The composite solid-liquid separation device of claim 1, characterized in that a first discharge channel is arranged at the bottom of the inner centrifugal cylinder (303), a second discharge channel is arranged at the bottom of the outer centrifugal cylinder (302), and a second slurry channel is arranged below the outer shell (301).

Technical Field

The invention relates to a composite solid-liquid separation device, in particular to a composite solid-liquid separation device for organic waste thermal cracking products such as livestock and poultry manure, straws, agricultural product processing residues, forestry waste and the like, and belongs to the technical field of environmental protection technology and mechanical equipment.

Background

On one hand, with the development of rural aquaculture, rural water, atmosphere and soil pollution caused by aquaculture excrement is increasingly concerned, and harmful substances such as germs, hormones, antibiotics and the like enter soil and water in an agricultural mode through livestock excrement without being effectively treated, so that the harmful substances further enter a food chain while the environment is deeply threatened to form a food safety problem. The in-situ incineration of straw is one of the important causes of air pollution. On the other hand, the use of a large amount of chemical fertilizers causes soil hardening and fertility reduction, and the residual chemical fertilizers are harmful to food safety, and simultaneously, water and soil pollution is aggravated and a large amount of resources are wasted.

With the increasing environmental importance of the public, the organic wastes such as the livestock and poultry manure, the straw and the agricultural product processing residues in the rural areas cannot be discarded or incinerated at any time, and the cost of the incineration disposal is relatively high when the wastes are collected. The organic wastes are autoclaved and hydrothermally cracked to prepare the fertilizer, which is undoubtedly an effective recycling treatment way.

Hydrothermal cracking (also called hydrothermal degradation) is an important link in a fertilizer making process, and can not only enable organic degradable substances, antibiotics and other substances in the fertilizer to have high-pressure water thermal cracking reaction, but also kill bacteria and viruses. However, the products of the hydrothermal cracking are often viscous high-moisture slurry-like materials, and particularly, the solid-liquid separation is difficult to be well carried out under the condition of only excrement. The existing solid-liquid separation equipment is difficult to carry out the solid-liquid separation for effectively separating the products.

Disclosure of Invention

The invention aims to provide a composite solid-liquid separation device capable of separating viscous materials after thermal cracking of water.

The invention is realized by the following technical scheme.

A composite solid-liquid separation device comprises an extrusion dehydration device and a centrifugal dehydration device, wherein the extrusion dehydration device comprises a cylinder body and a rotating shaft arranged in the center of the cylinder body, and a plurality of blades are arranged on the rotating shaft; the barrel adopts a three-sleeve structure, and the three-sleeve structure comprises an inner barrel and an outer barrel which are fixedly arranged and a middle barrel which is rotatably arranged; the inner tube and the middle tube both adopt a net structure, and the apertures of the inner tube and the middle tube net structure are respectively the hot town_inAnd both_outBroadlay_in>ø_out(ii) a A first slurry channel is formed at the tail end of the inner cylinder, and a second slurry channel is formed between the inner cylinder and the middle cylinderA slurry channel, wherein a first slurry channel is formed between the middle cylinder and the outer cylinder; the centrifugal dehydration device comprises a fixed outer shell and a rotary sleeve which is coaxially arranged with the outer shell, wherein the rotary sleeve comprises an inner centrifugal cylinder and an outer centrifugal cylinder; the inner centrifugal cylinder and the outer centrifugal cylinder both adopt centrifugal nets, and the aperture of the centrifugal net of the inner centrifugal cylinder is larger than that of the centrifugal net of the outer centrifugal cylinder; the outlet of the first slurry channel is arranged at the top of the inner centrifugal cylinder, and the outlet of the second slurry channel is arranged at the top of the outer centrifugal cylinder.

Optionally, according to an embodiment of the present invention, in the foregoing technical solution, both the centrifugal nets of the inner centrifugal cylinder and the outer centrifugal cylinder adopt concave-convex structures.

Optionally, according to an embodiment of the present invention, in the foregoing technical solution, a rotation speed of the inner centrifugal cylinder is less than a rotation speed of the outer centrifugal cylinder.

In the technical scheme, a first discharging channel is arranged at the bottom of the inner centrifugal cylinder, a second discharging channel is arranged at the bottom of the outer centrifugal cylinder, and a second slurry channel is arranged below the outer shell.

The invention has the following advantages and beneficial effects: the material through extrusion dewatering device initial separation has become the part that contains more thick material, the part that contains more thin material and the part that takes liquid as the main, and the material after these separations gets into the centrifugation part and carries out differential centrifugal separation, can further reduce solid portion moisture content, reaches more thorough solid-liquid separation effect. And the extrusion dewatering device changes the rotating speed by additionally arranging the middle barrel with the adjustable rotating speed, and can effectively clear the materials blocking the sieve pores while improving the separation efficiency, thereby effectively preventing the materials from blocking the sieve pores in the separation process. Through setting two series links of extrusion dehydration and centrifugal dehydration, can effectively realize the high-efficient solid-liquid separation of hydrothermal cracking product viscous material.

Drawings

FIG. 1 is a schematic view of a composite solid-liquid separation apparatus according to one embodiment of the present invention.

Fig. 2 is a schematic view of a concave-convex structure of the rotating sleeve according to the present invention.

In the figure: 1-a storage bin; 2-an extrusion dehydration device; 3-a centrifugal dehydration device; 201-outer cylinder; 202-axis of rotation; 203-inner cylinder; 204-middle cylinder; 205-a first slurry channel; 206-a second slurry channel; 301-an outer shell; 302-external centrifuge bowl; 303-internal centrifuge bowl.

Detailed Description

The following describes the embodiments and operation of the present invention with reference to the accompanying drawings.

The terms of orientation such as up, down, left, right, front, and rear in the present specification are established based on the positional relationship shown in the drawings. The corresponding positional relationship may also vary depending on the drawings, and therefore, should not be construed as limiting the scope of protection.

In the process of preparing organic fertilizer from livestock and poultry manure (including cow manure, pig manure and chicken manure), crop straws and other rural wastes, viruses and worm eggs can be inactivated by high-pressure water thermal cracking, and substances such as antibiotics and organic matters can be decomposed at the same time. But is thermally cracked under high pressure water to produce a viscous high moisture slurry. The composite solid-liquid separation device is used for separating the viscous high-moisture slurry-like material.

As shown in figure 1, the composite solid-liquid separation device comprises an extrusion dehydration device 2 and a centrifugal dehydration device 3.

The extrusion dehydration device comprises a cylinder body and a bin 1 arranged at one end of the cylinder body. The high-moisture slurry material to be separated enters the barrel from the bin 1. The barrel adopts a three-sleeve structure and comprises an inner barrel 203 and an outer barrel 201 which are fixedly arranged and a middle barrel 204 which is rotatably arranged, and the rotating speed of the middle barrel 204 is adjustable. The cylinder body of the middle cylinder 204 rotates, so that a rotary extrusion channel is respectively formed between the inner cylinder 203 and the middle cylinder 204 and between the middle cylinder 204 and the outer cylinder 201. Further, a rotating shaft 202 is arranged at the center of the cylinder, and a plurality of blades are arranged on the rotating shaft 202. One end of the rotating shaft is provided with a motor for driving the rotating shaft to rotate, so that a rotating extrusion channel is formed inside the inner cylinder. The inner cylinder 203 and the middle cylinder 204 both adopt a net structure, and the apertures of the inner cylinder and the middle cylinder net structure are respectively the hot town_inAnd both_outBroadlay_in>ø_out. At this time, a first slurry passage 205 is formed at the end of the inner cylinder 203, a second slurry passage 206 is formed between the inner cylinder 203 and the middle cylinder 204, and a first slurry passage is formed between the middle cylinder 204 and the outer cylinder 201.

Under the extrusion effect formed by the rotation of the rotating shaft 202 with blades, the slurry carries part of the fine (smaller than or equal to the mesh aperture of the inner cylinder) solid materials to enter the second slurry channel through the mesh structure on the inner cylinder 203, and the coarse materials dehydrated in the first stage advance along the inner cylinder 203 in the extrusion process. The slurry and the fine solid materials entering the second slurry channel enter the first slurry channel through the mesh structure of the middle cylinder under extrusion formed by rotation of the middle cylinder, and are finally collected from the tail end of the middle cylinder. The collected slurry is often used for making liquid fertilizer. While the finer material that is dewatered in the first stage travels along the second slurry path 206.

Above-mentioned extrusion dehydration separation's in-process through changing well section of thick bamboo rotational speed, can also effectively clear up the material that blocks up the sieve mesh to can effectively prevent that the material from blockking up the sieve mesh.

The centrifugal dewatering device 3 comprises a fixed outer casing 301 and a differential rotation sleeve, and the differential rotation sleeve and the outer casing 301 are coaxially arranged. The differential rotation sleeve comprises an inner centrifugal cylinder 303 and an outer centrifugal cylinder 302, and the rotation speed of the inner centrifugal cylinder 303 is less than that of the outer centrifugal cylinder 302. The inner centrifugal cylinder 303 and the outer centrifugal cylinder 302 both use centrifugal nets with net structures, and the aperture of the centrifugal net of the inner centrifugal cylinder is larger than that of the centrifugal net of the outer centrifugal cylinder. The inner centrifugal cylinder 303 serves as a first centrifugal area, and the space between the outer centrifugal cylinder 302 and the inner centrifugal cylinder 303 serves as a second centrifugal area.

In one embodiment, as shown in fig. 1, the lower portions of the inner centrifugal cylinder 303 and the outer centrifugal cylinder 302 are truncated cone shaped material collecting ends, and the material collecting ends may be fixedly arranged. The top of the centrifugal dewatering device is sealed with the outer shell, and a rotating gap is left between the top ends of the inner centrifugal cylinder 303 and the outer centrifugal cylinder 302.

An outlet of the first slurry channel 205 is arranged at the top of the inner centrifugal cylinder 303, so that the thicker materials extruded by the extrusion dehydration device in the inner cylinder 203 can fall into a first centrifugal area of the inner centrifugal cylinder 303, the thicker materials are centrifugally separated under the rotating centrifugal action of the inner centrifugal cylinder 303, and the centrifugally separated dry coarse materials are output from a first discharge channel arranged at the bottom of the inner centrifugal cylinder 303 and enter a subsequent process to prepare the solid organic fertilizer. And the centrifuged slurry carries a portion of the finer material through the wall of the inner bowl into the second centrifuge zone.

The outlet of the second slurry channel is arranged at the top of the outer centrifuge bowl 302 and between the outer centrifuge bowl 302 and the inner centrifuge bowl 303, so that the finer material which advances through the second slurry channel 206 enters the second centrifuge zone, and under the centrifugal separation action of the outer centrifuge bowl 302, the centrifugally separated dry fine material is output from the second discharge channel arranged at the bottom of the second centrifuge zone and enters the subsequent process. The separated slurry passes through the wall surface of the centrifugal net of the outer centrifugal cylinder and enters the shell area to be collected, the separated slurry is collected through a second slurry channel arranged at the bottom of the outer shell and is further subjected to concentration separation together with the slurry collected from the first slurry channel, the concentrated solution is used for preparing liquid fertilizer, and the dilute solution is used for infiltrating the raw materials.

In the above-mentioned centrifugal separation process, the inner and outer centrifugal cylinders are operated simultaneously, so that the separation of the slurry containing the finer material from the first centrifugal zone into the second centrifugal zone also takes place simultaneously.

As an optimized technical scheme, as shown in fig. 2, the centrifugal nets of the inner centrifugal cylinder and the outer centrifugal cylinder are both of concave-convex structures, materials rub and drag with each other in the rotating process, and the centrifugal net has the function of cleaning materials blocked by sieve pores, so that the separation effect is better, and the materials are prevented from being adhered to the wall surface.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.