CN105384324B - Biogas slurry and biogas residue separation of solid and liquid all-in-one - Google Patents

Abstract

The invention relates to an integrated solid-liquid separation machine for biogas slurry and biogas residue, which belongs to the technical field of general physical separation operations. The biogas slurry and residue solid-liquid separation machine includes a centrifugal mechanism, an auxiliary stirring mechanism, a shaftless screw pressing mechanism and a squeezing mechanism; the centrifugal mechanism, the auxiliary stirring mechanism, a shaftless screw pressing mechanism and a squeezing mechanism pass through each other sequentially from front to back The pipes are connected; when the integrated machine is in use, the biogas slurry and biogas residue continuously pass through the centrifugal mechanism, auxiliary stirring mechanism, shaftless screw pressing mechanism and pressing mechanism, and complete the first stage of centrifugal dehydration, secondary mixing and stirring, and mixing in sequence. Material pressure feeding and second stage dehydration. The biogas slurry and residue solid-liquid separation integrated machine has the advantages of compact structure, high separation efficiency of biogas slurry and residue, good raw material adaptability, and low water content of filter cake.

Description

Biogas slurry and biogas residue solid-liquid separation machine

technical field

The invention relates to an integrated solid-liquid separation machine for biogas slurry and biogas residue, which belongs to the technical field of general physical separation operations.

Background technique

At present, the function of biogas slurry and residue separation equipment is mainly to separate the biogas slurry that has been preliminarily treated, so that the residual biogas residue can be highly filtered, and the sewage can reach the standard of self-use and further treatment and discharge or make biogas slurry fertilizer.

The existing biogas slurry and biogas residue separation equipment is mainly composed of fixed filter screen, screw shaft, cylinder, frame, power and other parts. The principle of the equipment with this structure is that the biogas residue is separated by the screw shaft. The biogas slurry is rotated and pushed out, and the biogas slurry is precipitated by extrusion. After separation, the biogas slurry has a high slag content and the sewage is turbid. It is far away from the discharge and living utilization standards, and the value of the biogas slurry cannot be fully utilized. Blockage, low separation efficiency.

According to the applicant's understanding, the existing solid-liquid separation device for biogas slurry and biogas residue is not compact in structure, takes up a lot of space, and the effect is not good.

According to the applicant's understanding, traditional separators are mostly extensive separation, and the materials mostly enter through the main axis of rotation, and all of them are gathered in the inner cylinder of the centrifuge. The materials exist in the separator in a state similar to a solid cylinder, not only the machine workload Large, low efficiency, high noise, and large vibration amplitude.

Contents of the invention

The technical problem to be solved by the present invention is to propose an integrated biogas slurry and biogas residue solid-liquid separation machine with a compact structure and high separation efficiency in view of the deficiencies in the prior art.

The technical solution proposed by the present invention to solve the above technical problems is: an integrated machine for solid-liquid separation of biogas slurry and biogas slag, including a centrifugal mechanism and a pressing mechanism. The top of the centrifugal mechanism is provided with a primary feeding hopper. Above the all-in-one machine, the pressing mechanism is arranged below the all-in-one machine; the all-in-one machine also includes an auxiliary stirring mechanism and a shaftless screw pressing mechanism, and the auxiliary stirring mechanism is arranged in the middle of the all-in-one machine. The shaftless screw pressing mechanism is located on one side of the all-in-one machine and is located between the auxiliary stirring mechanism and the pressing mechanism; the centrifugal mechanism, auxiliary stirring mechanism, shaftless screw pressing mechanism and pressing mechanism are in sequence from front to back It is connected through a pipe connection; when the integrated machine is in use, the biogas slurry and biogas residue continuously pass through the centrifugal mechanism, auxiliary stirring mechanism, shaftless screw pressing mechanism and squeezing mechanism, and complete the first stage of centrifugal dehydration and secondary mixing in sequence Stirring, mixed material pressure feeding and second stage dehydration.

The present invention adopts the above-mentioned technical scheme, which brings the following effects: by integrating the centrifugal mechanism, auxiliary stirring mechanism, shaftless screw pressing mechanism and pressing mechanism, and combining the centrifugal mechanism, auxiliary stirring mechanism, shaftless screw pressing mechanism The mechanism and the pressing mechanism are connected to each other sequentially from front to back, and the first stage of centrifugal dehydration, secondary mixing and stirring, mixed material pressure feeding and second stage of squeezing dehydration are completed in sequence, and the centrifugal mechanism with strong adaptability and high degree of automation of raw materials and High performance, low energy consumption, and continuous operation of the pressing mechanism are organically combined, and the overall structure is very compact, which realizes the high-efficiency and high-quality separation of biogas slurry and residue. The advantage of low rates.

The improvement of the above technical solution is that: the centrifugal mechanism also includes a chassis arranged at the bottom of the centrifugal mechanism and driven to rotate by the first external motor, a distribution disc arranged at the outlet of the primary feeding hopper, Between the cylindrical screen, the outside of the screen is provided with an outer cylinder; the chassis is made with a slag outlet, the screen is fixed on the chassis and the cylindrical rotation center line of the screen is vertically upward , the distributing pan protrudes into the upper part of the screen and forms a distributing gap with the inner wall of the cylinder of the screen, the distributing gap is used to pass the biogas slurry and residue and make the biogas slurry and residue along the The inner wall of the cylinder of the screen forms a uniform annular material layer.

The present invention adopts the above-mentioned technical scheme, which brings the following effects: the centrifugal mechanism of the present invention, when the biogas slurry and residue evenly reaches the upper edge of the screen through the distribution plate, under the action of gravity, it will move downward along the screen wall. Flow, due to the reasonable control of the feeding amount, the material forms a uniform annular material layer with a certain thickness along the screen wall. During the downward movement of the biogas slurry and residue along the screen, the high-speed rotating screen generates centrifugal force to drive the ring. The material layer rotates at a high speed, so that the biogas slurry is separated from the mixed material during the top-down movement, and the biogas residue gathers on the chassis, and the solid and liquid phases are separated during the top-down movement of the material. , high separation efficiency.

A further improvement of the above technical solution is that: the chassis is fixed with a support shaft that coincides with the center line of the screen rotation, and a plurality of claws are arranged spirally at intervals on the support shaft, and the end of each claw is fixed with a A flexible unloading plate with brushes fixed on the unloading plate.

A further improvement of the above-mentioned technical solution is: the cylinder wall of the screen is provided with buffer bars, and the cylinder wall of the screen presents an inclination angle with the vertical plane.

One of the perfections of the above technical solution is: the all-in-one machine also includes a buffer mechanism, the buffer mechanism is formed with an overflow port, and the buffer mechanism is provided with a hydraulic propeller and a pusher plate.

The second improvement of the above technical solution is: the auxiliary stirring mechanism includes a stirring shaft connected to the output end of the second motor, the auxiliary stirring mechanism is provided with a secondary feeding hopper, a stirring inlet and a stirring outlet, and the stirring shaft is located at A cross stirrer is fixed at one end of the stirring inlet, and a screw conveying blade is fixed at the other end of the stirring shaft at the stirring outlet.

The third improvement of the above-mentioned technical solution is: the squeezing mechanism includes a squeezing casing, a screw squeezer located in the squeezing casing and a squeezing screen, and the screw squeezer includes two side-by-side connected to the output end of the third motor. Screw shafts, screw press blades fixed on each screw shaft and having an 8-shaped cross section, the press mechanism is formed with a press inlet and a press outlet, and the press housing is provided with a liquid outlet.

The fourth improvement of the above technical solution is: the shaftless screw pressing mechanism includes a shaftless screw conveyor connected to the output end of the fourth motor.

The fifth improvement of the above technical solution is: the outlet of the primary feeding hopper is provided with a valve for adjusting the amount of feed, and the distribution pan is provided with a liquid level sensor.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing:

Figure 1 is a schematic diagram of the device structure of the biogas slurry and biogas slag solid-liquid separation machine of the present invention

Figure 2 is a schematic structural view of the centrifugal mechanism in Figure 1

Figure 3 is a working principle diagram of the centrifugal mechanism in Figure 2

Figure 4 is a schematic diagram of the assembly structure of the auxiliary stirring mechanism, buffer mechanism and shaftless screw pressing mechanism in Figure 1

Figure 5 is a top view of Figure 4

Figure 6 is a schematic structural view of the pressing mechanism in Figure 1

Figure 7 is a top view of Figure 6

Fig. 8 is a schematic structural view of the shaftless screw pressing mechanism in Fig. 1 .

detailed description

Example

The biogas slurry and biogas slag solid-liquid separation integrated machine of this embodiment, as shown in Figure 1, includes a centrifugal mechanism 1, an auxiliary stirring mechanism 2, a shaftless screw pressing mechanism 3 and a squeezing mechanism 4, and the top of the centrifugal mechanism 1 is provided with a primary Feed hopper 11.

Centrifugal mechanism 1 is arranged on the top of this all-in-one machine, and squeezing mechanism 4 is arranged on the below of this all-in-one machine. The auxiliary stirring mechanism 2 is arranged in the middle of the all-in-one machine, and the shaftless screw pressing mechanism 3 is arranged on one side of the all-in-one machine and is located between the auxiliary stirring mechanism 2 and the pressing mechanism 4; the centrifugal mechanism 1, the auxiliary stirring mechanism 2, the The shaft screw pressing mechanism 3 and the squeezing mechanism 4 communicate with each other sequentially through pipe joints from front to back. Pipe connection refers to communication through the pipeline joints between the above-mentioned centrifugal mechanism 1 , auxiliary stirring mechanism 2 , shaftless screw pressing mechanism 3 and squeezing mechanism 4 .

When the all-in-one machine is in use, the biogas slurry and biogas residue continuously pass through the centrifugal mechanism 1, the auxiliary stirring mechanism 2, the shaftless screw pressing mechanism 3 and the squeezing mechanism 4, and the first stage of centrifugal dehydration, secondary mixing and stirring, and mixture pressing are completed in sequence. Sent to the second stage of dehydration.

As shown in Fig. 2 and Fig. 3, the centrifugal mechanism 1 of this embodiment also includes a chassis 13 arranged at the bottom of the centrifugal mechanism and driven to rotate by an external first motor 12, and a distribution pan 14 arranged at the outlet of the primary feeding hopper 11 1. A cylindrical screen 15 arranged between the primary feed hopper 11 and the chassis 13, the outside of the screen 15 is provided with an outer cylinder. The centrifugal mechanism 1 is provided with a biogas slurry outlet and a biogas residue outlet connected to the slag outlet.

The chassis 13 is formed with a slag outlet 131, the screen 15 is fixed on the chassis 13 and the centerline of the cylindrical rotation of the screen is vertically upward. The distributing pan 14 extends into the upper part of the screen 15 and forms a distributing gap with the inner wall of the screen 15. The distributing gap is used to pass the biogas slurry and dregs and make the biogas slurry and dregs along the inner wall of the screen 15. Form a uniform annular material layer.

The chassis 13 of this embodiment is fixed with a support shaft 16 that coincides with the center line of the screen rotation, and a plurality of claws 17 are spirally arranged at intervals on the support shaft 16, and a flexible discharge plate is fixed at the end of each claw 17. 18. A brush is fixed on the unloading plate. A slag scraper 19 is fixed on the chassis 13 .

When the screen cloth 15 rotated, when the discharge plate 18 scraped off the biogas residue on the screen cloth 15 wall, the brushes cleaned the mesh of the screen cloth 15, effectively improving the screen cloth clogging problem.

The cylinder wall of the screen 15 is provided with buffer grids 151 . The material distributing tray 14 is shaped on a certain inclination angle, and the screen cloth 15 adopts an oblique screen cloth, and the cylinder wall of the screen cloth 15 presents an inclination angle with the vertical plane. A valve 111 for adjusting the feeding amount is provided at the outlet of the primary feeding hopper 11 , and a liquid level sensor 141 is provided on the distribution pan 14 .

As shown in FIG. 4 and FIG. 5 , the all-in-one machine of this embodiment also includes a buffer mechanism 5 , which is formed with an overflow port 53 , and the buffer mechanism 5 is provided with a hydraulic pusher 51 and a pusher plate 52 .

The auxiliary stirring mechanism 2 of the present embodiment comprises a stirring shaft 22 connected to the output end of the second motor 21. The auxiliary stirring mechanism 2 is provided with a secondary feeding hopper, a stirring inlet and a stirring outlet 26, and the stirring shaft 22 is fixed at one end of the stirring inlet. There is a cross stirrer 23, and the other end of the stirring shaft 22 located at the stirring outlet is fixed with a screw conveying blade 24. A scraper 25 is provided at the feed inlet.

As shown in FIG. 6 and FIG. 7 , the squeezing mechanism 4 of this embodiment includes a squeezing casing 41 , a screw squeezer 42 and a squeezing screen 43 located in the squeezing casing. The screw press 42 includes two screw shafts connected side by side with the output end of the third motor 44, screw pressing blades fixed on each screw shaft and having an "8" shape in cross section, and the screw press blades on the two screw shafts. The pressing blades are arranged in a staggered interval, and the two screw shafts rotate in opposite directions relative to each other. The squeeze mechanism 4 is formed with a squeeze inlet 45 and a squeeze outlet 46 , and the squeeze housing 41 is formed with a liquid outlet 47 . The screw press blade is a screw blade with variable diameter and pitch.

As shown in FIG. 8 , the shaftless screw pressing mechanism 3 of this embodiment includes a shaftless screw conveyor 31 connected to the output end of a fourth motor 32 .

When performing solid-liquid separation of biogas slurry and biogas residue, the following steps are included:

1) The centrifugal mechanism 1 is used for the first stage of dehydration: the biogas slurry and residue is added from the primary feed hopper 11 and then reaches the top of the distribution plate 14, and the distribution gap is used to pass the biogas slurry and residue along the screen. The inner wall of the cylinder 15 forms a uniform annular material layer; the chassis 13 rotates at a high speed under the rotation of the first motor 12 to generate centrifugal force to drive the annular material layer to rotate at a high speed, so that the biogas slurry and a small amount of biogas residue with a particle size smaller than the aperture of the screen 15 are separated The biogas residue attached to the inner wall of the screen 15 will all fall into the bottom of the screen, and enter the auxiliary stirring mechanism in the middle from the biogas residue outlet through the slag outlet made on the chassis 13. within 2;

2) Auxiliary stirring mechanism 2 is used for stirring and mixing: add rice husk or straw powder and biogas residue through the secondary feeding hopper to mix, and then the mixed material is discharged from the stirring outlet 26;

3) The second-stage dehydration is carried out by the pressing mechanism 4: the uniformly mixed material is transported to the pressing inlet 45 of the pressing mechanism 4, and is pressed and dehydrated by the pressing mechanism.

In step 2), the stirring outlet 26 is also communicated with the overflow port 53 of the buffer mechanism 5, and the buffer mechanism 5 includes a hydraulic pusher 51 and a pusher plate 52; when there is too much mixed material, the excess material passes through the overflow port 53 is squeezed into the buffer mechanism 5, and when the mixed material is not enough to squeeze, the material in the buffer mechanism 5 is pressed into the squeeze mechanism 4 by the hydraulic propeller 51 and the pushing plate 52 to squeeze.

In step 1), a valve 111 for adjusting the amount of feed is provided at the outlet of the primary feed hopper 11, and a liquid level sensor 141 is provided on the material distribution pan 14; the liquid level sensor 141 detects the thickness of the annular material layer and transmits the thickness signal For the control system, the control system controls the opening size of the valve 111 .

The present invention is not limited to the above-mentioned embodiments. All technical solutions formed by equivalent replacements fall within the scope of protection required by the present invention.

Claims (9)

1. set at the top of a kind of biogas slurry and biogas residue separation of solid and liquid all-in-one, including centrifugal mechanism and press mechanism, the centrifugal mechanism Once feed hopper, the centrifugal mechanism is located at the top of the all-in-one, and the press mechanism is located at the lower section of the all-in-one；Its It is characterised by, the all-in-one also includes auxiliary rabbling mechanism and shaftless screw feeding pressure mechanism, and the auxiliary rabbling mechanism is located at should The middle part of all-in-one, the shaftless screw feeding pressure mechanism is located at the side of the all-in-one and positioned at the auxiliary rabbling mechanism and pressure Between crusher structure；The centrifugal mechanism, auxiliary rabbling mechanism, shaftless screw feeding pressure mechanism and press mechanism are suitable each other from front to back Sequence is led in succession by pipe；The all-in-one in use, the biogas slurry and biogas residue continue through the centrifugal mechanism, auxiliary rabbling mechanism, Shaftless screw feeding pressure mechanism and press mechanism, are sequentially completed first order centrifugal dewatering, secondary mixing, compound force feed and The de- liquid of two grades of squeezings.

2. biogas slurry and biogas residue separation of solid and liquid all-in-one as claimed in claim 1, it is characterised in that：The centrifugal mechanism also includes being located at The centrifugal mechanism bottom and the chassis of rotation is driven by outside first motor, the cloth tray located at a feed hopper exit, set In a cylindrical sieve between feed hopper and chassis, the outside of the screen cloth is provided with outer barrel；The chassis is formed with slag notch, institute State screen cloth be fixed on chassis and the screen cloth tubular centre of gyration line straight up, the cloth tray is stretched into the screen cloth Top at and be formed between the cylinder inwall of the screen cloth cloth gap, the cloth gap is used for by biogas slurry and biogas residue simultaneously Make the cylinder inwall formation one uniform annulation bed of material of the biogas slurry and biogas residue along the screen cloth.

3. biogas slurry and biogas residue separation of solid and liquid all-in-one as claimed in claim 2, it is characterised in that：Be fixed with the chassis with it is described Interval spiral cloth is equipped with multiple pusher dogs, the end of each pusher dog in the support shaft that screen cloth centre of gyration line is overlapped, the support shaft Hairbrush is fixed with fixed flexible stripper, the stripper.

4. biogas slurry and biogas residue separation of solid and liquid all-in-one as claimed in claim 2, it is characterised in that：The barrel of the screen cloth is provided with slow Glazing bar is rushed, an inclination angle is presented in barrel and the vertical plane of the screen cloth.

5. Claims 1-4 it is any as described in biogas slurry and biogas residue separation of solid and liquid all-in-one, it is characterised in that：The all-in-one is also wrapped Buffer gear is included, the buffer gear is formed with overfall, and the buffer gear is provided with hydraulic pusher and scraping wings.

6. Claims 1-4 it is any as described in biogas slurry and biogas residue separation of solid and liquid all-in-one, it is characterised in that：The auxiliary stirring Mechanism includes the agitating shaft being connected with the second motor output end, and the auxiliary rabbling mechanism is provided with secondary feeds bucket, stirring import With stirring outlet, one end that the agitating shaft is located at stirring import is fixed with cross agitator, and the agitating shaft, which is located at, to be stirred out The other end of mouth is fixed with spiral conveying blade.

7. Claims 1-4 it is any as described in biogas slurry and biogas residue separation of solid and liquid all-in-one, it is characterised in that：The press mechanism Including squeezing housing, the screw press in squeezing housing and squeezing screen cloth, the screw press includes and the 3rd electricity Machine output end connection side by side two helical axis, be fixed on each helical axis and cross section be in 8-shaped screw press Blade, the press mechanism is formed with squeezing import and squeezing outlet, the squeezing housing and is formed with liquid outlet.

8. Claims 1-4 it is any as described in biogas slurry and biogas residue separation of solid and liquid all-in-one, it is characterised in that：The shaftless screw Feeding pressure mechanism includes the shaftless screw conveyer being connected with the output end of the 4th motor.

9. the biogas slurry and biogas residue separation of solid and liquid all-in-one as described in claim 2,3 or 4, it is characterised in that：Feed hopper goes out The valve for being used for adjusting inlet amount is provided with mouthful, the cloth tray is provided with liquid level sensor.