CN216918829U - Solid-liquid separation equipment for breeding industry - Google Patents

Abstract

The utility model discloses solid-liquid separation equipment for the breeding industry. The device comprises a dewatering device, a dewatering device frame, a flocculation mixing tank, an electric control cabinet and a pipeline pump; the spiral squeezing dewatering body and the spiral folding dewatering body of the dewatering equipment are obliquely arranged on the frame of the dewatering equipment; the flocculation mixing tank is arranged beside the frame of the dewatering equipment; the filtrate outflow port of the spiral squeezing dewatering body is connected with the sludge inlet of the flocculation mixing tank through a pipeline pump; the sludge outlet of the flocculation mixing tank is connected with the feed inlet of the spiral shell stacking dehydration body; the screw shaft of the screw press dehydration body adopts a structure of a double-screw propulsion shaft and an intermittent shaft: the conveying section adopts a double-head continuous spiral, the dewatering section adopts an interrupted spiral, namely a broken tooth spiral, and each group of two spiral blades of the broken tooth spiral are arranged in a mirror symmetry mode by taking the shaft as the center; the front end fracture of each helical blade of each broken tooth helical group is provided with a sharp cutting edge. The equipment is simplified, has high automation degree, is simple and convenient to operate, and reduces secondary pollution.

Description

A solid-liquid separation equipment for aquaculture industry

technical field

The utility model belongs to the technical field of sewage treatment, and relates to a solid-liquid separation device used in aquaculture industry.

Background technique

At present, what most farmers are worried about is not animal epidemics and volatile market prices, but the ban, shutdown and relocation of livestock and poultry that have swept across the country caused by increasingly severe environmental problems. Breeding pollution has existed since ancient times. In recent years, with the rapid development of animal husbandry production, the scale of breeding has continued to expand, and the amount of livestock and poultry manure, sewage and other breeding wastes has also increased rapidly, resulting in increased environmental load pressure, and the problem of livestock and poultry breeding pollution has become increasingly prominent. . According to the determination, the daily BOD (biochemical oxygen demand) in adult pig feces is 13 times that of human feces. Pig farms have become or are becoming a source of pollution equal to or even greater than industrial wastewater and domestic sewage. Improper treatment will pose a great threat to environmental protection.

As shown in Figure 1, the existing conventional aquaculture wastewater treatment simple process is: the aquaculture wastewater is filtered to remove part of the solid impurities through the grid, and then flows into the flotation tank for concentration, and the clarified liquid flows into the anaerobic fermentation process section, and the concentrated liquid passes through the drum-type solidification process. Liquid separators or other types of solid-liquid separation equipment produce mud cakes for outbound processing, and the filtrate flows into the anaerobic fermentation process section. It occupies a large area and requires a high initial investment.

In short, the existing aquaculture wastewater dehydration treatment process routes on the market have defects such as high input cost, excessive equipment classification, low degree of automation, complicated operation, dirty working environment, and serious secondary pollution.

The existing solid-liquid separation equipment used in the aquaculture industry needs to solve the following problems:

1. The entire sewage treatment process requires a lot of equipment, and the initial investment is large.

2. Each device operates independently, and the degree of automation is not high.

3. The discharged filtrate needs to be used with a filter tank or other equipment, which occupies a large area.

4. Aquaculture wastewater (sewage) has the characteristics of uneven concentration (sometimes thin, sometimes viscous). The sewage in the breeding industry is accompanied by more long-fiber materials (feces), fine particles (such as manure, feed, etc.) and other sundries. When the existing screw press dewatering equipment treats aquaculture sewage, since there are many long-fiber materials in the aquaculture sewage (sludge), it is easy to wrap around the spiral blades, causing the dehydration cavity to be blocked and stuck.

5. The existing solid-liquid separation equipment makes the fine particles (such as feces, feed, etc.) discharged with the filtrate, which cannot effectively clean up the solid suspended matter in time, and the concentration of CODcr and BOD5 increases greatly, which brings difficulties to the subsequent biochemical treatment and increases the treatment load , which affects the processing effect.

Utility model content

The purpose of this utility model is to overcome the deficiencies of the prior art, aiming at the defects of high input cost, excessive equipment, low degree of automation, complicated operation, messy working environment, secondary pollution, etc. The utility model relates to a solid-liquid separation device for aquaculture industry, which has simplified equipment, high degree of automation, simple and convenient operation, and can reduce secondary pollution.

The technical scheme of the present utility model is as follows:

The utility model relates to a solid-liquid separation device (specialized machine for aquaculture pretreatment) used in the aquaculture industry, which comprises a dehydration device and a dehydration device rack, as well as a flocculation mixing tank, an electric control cabinet and a pipeline pump; the dehydration device includes The screw press dehydration body (screw press) and the snail stacking dehydration body (screw stacking machine); the screw press dehydration body and the snail stacking dehydration body are installed obliquely on the dehydration equipment rack; the flocculation mixing tank is arranged beside the dehydration equipment rack; The filtrate outlet of the screw press dewatering body (screw press) is connected to the mud inlet of the flocculation mixing tank through a pipeline pump; the mud outlet of the flocculation mixing tank is connected to the feeding port of the screw dewatering body (screw stacking machine);

The screw press conveying shaft of the screw press dewatering body, that is, the screw pressing screw shaft, adopts the structure of a double screw propeller shaft and an interrupted shaft: the screw pressing screw shaft includes shaft heads at both ends, as well as a middle conveying section and a dehydrating section; the conveying section A double-ended continuous helix is used, and the helical blades of the double-ended continuous helix are two continuous helical blades arranged mirror-symmetrically around the axis; The helical blades are single-piece, intermittently arranged two by two, and the two helical blades of each group are arranged mirror-symmetrically with the axis as the center; The helical segment and the discontinuity without the helical blade (there is a discontinuity between two adjacent helical segments); each helical blade of each group of the broken tooth helix has two front and rear fractures (that is, the front and rear ends) ; A sharp blade is provided at the fracture of the front end (front feeding end) of each spiral blade of each group of broken tooth spirals.

Further, the screw press dehydration body includes the screw press screw shaft, and also includes a screw press dehydration deceleration motor, a back pressure spring, a back pressure cone, a screen barrel in the conveying section, a screen barrel in the dewatering section, a feeding hose, an overflow soft Pipe and feeding connection plate; the screen barrel of the conveying section and the screen barrel of the dewatering section are installed on the frame, and are arranged in the middle and front of the dewatering body of the screw press in sequence; There is a mud outlet at the bottom of the barrel end; both ends of the screw shaft are installed on the bearing seat through bearings, and the bearing seat is installed on the frame; the conveying section and the dewatering section of the screw shaft are located in the conveying section screen barrel and the dewatering section screen respectively. On the central axis of the barrel; on the end shaft head of the screw pressure screw shaft, the outermost end is connected with a screw pressure dehydration gear motor, and the inner side is sequentially provided with a spring top plate, a back pressure spring and a back pressure cone head; the spring top plate is fixed on the machine. On the rack, the back pressure cone head is connected with the back pressure spring; the feed connection plate is fixedly arranged at the front end of the screw press dehydrator; the feed connection plate is fixed at the front end of the screw press dewatering body, and there are upper and lower flange ports on it. Among them, the upper one is the mud inlet, and the lower one is the overflow outlet; the feed inlet at the upper end of the front part of the screen barrel of the conveying section is connected with the mud inlet on the feed connection plate through the feeding hose. The overflow port below the feed port at the front upper end of the screen barrel of the conveying section is connected with the overflow port on the feed connection plate through an overflow hose; the overflow hose is arranged below the feed hose.

Further, there are protruding teeth on the inner wall of the screen barrel of the dewatering section, and the protruding teeth are just embedded in the discontinuity of the discontinuous spiral to prevent the material from accumulating in the discontinuous part of the spiral blade and causing blockage.

Further, dehydration equipment protective cover plates are installed on both sides of the dehydration equipment frame.

Further, the dehydration equipment includes a screw press dehydration body (screw press, screw dehydration body) and one or more screw stacking dehydration bodies (screw stacker).

Further, the flocculation mixing tank includes a mixing tank body, a stirring paddle, a stirring motor, a dosing pipe, and an overflow regulating pipe; the stirring paddle is vertically arranged in the center of the mixing tank body; the upper end of the stirring paddle is connected with the stirring motor and is connected by the stirring motor. Drive; the upper part of the mixing tank is provided with a dosing pipe, which is connected to the dosing equipment; the upper part of the mixing tank is provided with a mud feeding box, and the outlet of the pipeline pump is connected to the mud feeding of the flocculation mixing tank through the mud feeding pipe port (flange) connection; the bottom of the mud inlet box of the flocculation mixing tank is provided with a mud inlet port and an overflow port; there is an overflow regulating pipe on the mud inlet box, and the bottom of the overflow regulating pipe is an overflow port, and the overflow The flow port is connected with the overflow pipe; the upper part of the other side of the mixing tank is provided with a mud outlet, which is connected with the feed port of the screw stacker dewatering body (screw stacker).

Further, the stirring paddle is a straight plate type or a large-area inclined blade type stirring paddle, and the rotating speed is 20-40 RPM; the stirring deceleration motor is a deceleration motor driven by a frequency converter, and has the function of speed regulation.

Further, the screw stacking dehydration body (screw stacking machine) includes a screw stacking dehydration gear motor, a back pressure plate, a screw stacking screw shaft, a dehydration section ring piece, a concentration section ring piece and a feed port; one end of the screw stacking screw shaft is connected to the screw stacking dehydration. The geared motor is connected; the other end of the screw stacking screw shaft is provided with a feeding port; on the screw stacking screw shaft, the side of the stacking screw screw shaft is the concentration section, which is provided with a concentration section ring; There is a back pressure plate behind the dewatering section on the screw shaft of the stacked screw.

Further, a PLC controller is arranged in the electric control cabinet; the screw pressure dehydration deceleration motor, the screw stack dehydration deceleration motor, and the stirring deceleration motor are all connected with the output end of the PLC controller.

As shown in Figure 2, the dehydration treatment process route of aquaculture wastewater using the special machine for aquaculture pretreatment of the present invention is as follows: the aquaculture wastewater directly enters the special machine for aquaculture pretreatment, and the larger hard particles, coarse fibers are removed by screw pressing the dewatering body. The filtrate flows into the flocculation mixing tank, and the dosing equipment puts the PAM agent of about 1.5‰ to 2‰ into the flocculation mixing tank. The mud cake with a moisture content of 80% is transported out for treatment, the clarified liquid is discharged after treatment, and the concentrated liquid is returned to the flocculation mixing tank for further treatment.

Technical features of the present utility model:

1) The structure of the special machine for aquaculture pretreatment is composed of the above components. The overall process is: mud feeding - screw pressing main body (slag discharge, water content of about 50%, that is, the moisture content of the filter residue after screw pressing is about 50%) - filtrate tank collection - pump - Dosing - flocculation in mixing tank - main body of stacked snails (particulate matter, water content of about 80%, that is, the moisture content of the mud cake after the dehydration of stacked snails is about 80%).

2) The flocculation stirring device in the flocculation mixing tank, the stirring blade is a straight plate type or a large-area inclined blade type stirring blade, and the speed is 20-40RPM; the stirring gear motor is a gear motor driven by a frequency converter, and has the function of speed regulation.

3) A screw press dehydration body plus one or more stacked screw dehydration bodies form a dehydration part.

4) The screw press conveying shaft of the screw press dewatering body, that is, the screw press screw shaft adopts the structure of double screw propeller shaft and interrupted shaft.

5) The filtration accuracy of the screw plug seam (the screen barrel of the dehydration section and the screen barrel of the conveying section are made of screens, and the filtering accuracy of the screen of the screen barrel of the dehydration section and the screen barrel of the conveying section, that is, the pore size of the screen is 0.5～0.75mm).

The beneficial effects of the present utility model:

The solid-liquid separation equipment product of the utility model used in the breeding industry is popular in the market due to the high input cost, excessive equipment, low degree of automation, complicated operation and dirty working environment of the existing breeding and dehydration process routes on the market. It is developed on the basis of the advanced stacked screw sludge dewatering machine combined with the advanced technology of the company's sludge treatment equipment. Compared with the previous process route, it has the advantages of small footprint, fewer process steps, one device can replace multiple previous devices, and greatly simplifies the difficulty of personnel operation and maintenance, which can basically be unattended, reducing manpower and material resources.

The solid-liquid separation equipment used in the breeding industry of the utility model has the advantages of simplified equipment, high degree of automation, simple and convenient operation, and reduced secondary pollution. After being processed by this solid-liquid separation equipment, the aquaculture sewage is turned into reclaimed water, and the garbage, feces or sludge are also completely separated, and the dry humidity reaches more than 80%. The sludge can be used as the raw material of organic fertilizer and compound fertilizer. It has effectively realized the function of environmental protection governance going to the grassroots level, treating it from the source, and turning waste into treasure at the source. It has changed the current situation of serious secondary pollution, and realized the harmless, reduction and resource treatment of garbage.

The solid-liquid separation equipment used in the breeding industry of the utility model solves the problems to be solved in the prior art, and has the following advantages:

1. The use effect of a single device can replace multiple devices in the original process route, and the initial investment is small;

2. The whole set of equipment can run automatically, without the need for resident personnel, with a high degree of automation, reducing personnel maintenance costs;

3. There is no need to use supporting filters or other equipment to discharge the filtrate, and the floor area is small;

4. The screw-pressing screw shaft of the screw-pressing dehydration body adopts the structure of double-helix propelling shaft and discontinuous shaft. The front-end fracture of each screw blade of each group of the screw-tooth screw is provided with a sharp blade, which has a cutting function and can be rotated during rotation. It can effectively cut off long fibers and other sundries, prevent the machine from being blocked and stuck, quickly filter large particles and long fibers, and effectively improve the production capacity of the equipment.

5. The screw stacker can effectively clean up suspended solids through the flocculation effect of PAM, reduce the concentration of CODcr and BOD5, and greatly reduce the subsequent biochemical treatment load.

Description of drawings

Fig. 1 is the simple flow chart of existing conventional aquaculture wastewater treatment;

Fig. 2 is the process route diagram of dehydration treatment of aquaculture wastewater using the special machine for aquaculture pretreatment of the present invention;

Fig. 3 is the side view structure schematic diagram of a kind of solid-liquid separation equipment used in aquaculture industry of the present invention;

Fig. 4 is the top view structure schematic diagram of the solid-liquid separation equipment used for breeding industry of the present invention;

Fig. 5 is the side view structure schematic diagram of the screw press dewatering body 2 in the present invention;

Fig. 6 is the front view structure schematic diagram of the flocculation mixing tank 3 in the present utility model;

Fig. 7 is the side view structure schematic diagram of the flocculation mixing tank 3 in the present utility model;

FIG. 8 is a schematic side view of the structure of the stacked snail dehydration body 6 in the present invention.

In the figure: 1. Dehydration equipment rack; 2. Screw press dehydration body; 3. Flocculation mixing tank; 4. Electric control cabinet; 5. Pipeline pump; 6. Snail stacking dehydration body;

11. Interruption; 12. Blade; 13. Double-ended continuous spiral; 13a, 13b, double-ended continuous spiral blade; 14. Broken tooth spiral; 14a, 14b, broken tooth spiral blade; ;B, dehydration section; G, material advancing direction;

21. Screw pressure dehydration gear motor; 22. Spring top plate; 23. Back pressure spring; 24. Back pressure cone; 25. Screen barrel in dehydration section; 26. Screen barrel in conveying section; material connecting plate; 29, screw screw shaft; 30, overflow hose;

31, mixing tank body; 32, stirring paddle; 33, stirring gear motor; 34, dosing pipe; 35, overflow regulating pipe; 36, mud inlet; 37, mud inlet pipe; 38, mud inlet; 39, Overflow port; 40. Mud outlet;

61, dehydration gear motor for stacked screw; 62, back pressure plate; 63, screw shaft for stacking screw; 64, dehydration section ring piece; 65, concentrated section ring piece; 66, feeding port.

Detailed ways

The utility model will be further described below in conjunction with the accompanying drawings and embodiments.

Example

As shown in Figure 3 and Figure 4, the utility model is a solid-liquid separation equipment (special machine for aquaculture pretreatment) used in the breeding industry, which comprises a dehydration equipment rack 1, a screw press dewatering body 2 (screw press), The flocculation mixing tank 3, the electric control cabinet 4, the pipeline pump 5, the snail stacking dehydration body 6 (screw stacking machine) and the dehydration equipment protective cover plate 7; 2) and two screw stacking machines (screw stacking dehydration body 6). The screw press dewatering body 2 and the screw stacking dewatering body 6 are installed obliquely on the dewatering equipment rack 1, and dewatering equipment protective cover plates 7 are installed on both sides of the dewatering equipment rack 1; the flocculation mixing tank 3 and the electric control cabinet 4 are arranged in Next to the dewatering equipment rack 1; the filtrate outlet of the liquid collecting tank at the bottom of the screw press dewatering body 2 is connected to the mud inlet 38 of the flocculation mixing tank 3 through the pipeline pump 5; the mud outlet 40 of the flocculation mixing tank 3 is connected to the stack screw The feed port 66 of the dehydration body 6 (screw stacker) is connected.

As shown in Figure 2, the dehydration treatment process route of the aquaculture wastewater using the special machine for aquaculture pretreatment of the present invention is as follows: the aquaculture wastewater directly enters the special machine for aquaculture pretreatment, and the larger dewatering body 2 (screw press) is squeezed by the screw press. Hard particles and coarse fibrous substances are filtered out, the filter residue is transported out for treatment, the filtrate flows into the flocculation mixing tank 3, the dosing equipment puts the PAM agent of about 1.5‰ to 2‰ into the flocculation mixing tank 3, and the filtrate is flocculated and stirred to form flocculation. The mass enters the snail stacking dehydration body 6 (screw stacking machine), and forms a mud cake with a moisture content of 80% for external transportation. The clarified liquid flowing out of the concentration section is treated and discharged, and the concentrated liquid flowing out of the dewatering section is returned to the flocculation mixing tank for processing again. .

As shown in Figure 5, the screw press dehydration body 2 includes a screw pressure dehydration deceleration motor 21, a spring top plate 22, a back pressure spring 23, a back pressure cone 24, a dewatering section screen barrel 25, a conveying section screen barrel 26, and a feeding hose. 27. Feeding connecting plate 28, screw pressing screw shaft 29, overflow hose 30; screen barrel 26 of conveying section and screen barrel 25 of dewatering section are installed on the frame, and are arranged in the middle and front positions of the dewatering body 2 of the screw press in sequence Both ends of the screw shaft 29 are mounted on the bearing seat through bearings, and the bearing seat is installed on the frame; the conveying section A and the dewatering section B of the screw pressing screw shaft 29 are respectively located in the conveying section screen barrel 26 and the dewatering section screen barrel 25 On the central axis of the inner part; the upper end of the front part of the screen barrel 26 of the conveying section is provided with a feeding port, and the lower part of the end of the screen barrel 25 of the dewatering section is provided with a mud outlet; The geared motor 21 is provided with a spring top plate 22, a back pressure spring 23 and a back pressure cone head 24 on the inner side in turn; the spring top plate 22 is fixed on the frame; the back pressure cone head 24 is connected with the back pressure spring 23 and can be screwed in the screw The shaft 29 slides on the shaft 29; the feed connection plate 28 is fixedly arranged at the front end of the screw press dewatering body 2, and there are upper and lower flange ports on it, among which the upper one is the mud inlet and the lower one is the overflow port; the conveying section screen The opening (feed port) at the upper end of the front of the barrel 26 is connected to the mud feed port on the feed connection plate 28 through a feed hose 27 . The overflow port below the feed port at the front upper end of the screen barrel 26 of the conveying section is connected to the overflow port on the feed connection plate 28 through an overflow hose 30 ;

The working principle of the screw press dewatering body 2: the aquaculture wastewater enters the screen barrel 26 of the conveying section and the screen barrel 25 of the dehydration section through the flange port (mud inlet) on the feeding connecting plate 28 in turn, and then enters the screen barrel 26 of the conveying section and the screen barrel 25 of the dewatering section in sequence. And under the action of the back pressure cone 24, pressure is formed between the sieve barrel 25 of the dehydration section, the sieve barrel 26 of the conveying section, and the screw-pressing screw shaft 29, and the filtrate is squeezed from the gap (sieve hole) on the surface of the sieve barrel by the pressure. out, the filter residue is sent to the mud outlet through the screw press conveying shaft (screw pressing screw shaft 29).

Structural design and advantages of the screw press conveying shaft (screw pressing screw shaft 29 ) of the screw press dewatering body 2:

(1) The screw-pressing screw shaft 29 adopts the structure of a double screw propeller shaft (conveying section) plus an interrupted shaft (extrusion section): the screw-pressing screw shaft 29 includes shaft heads at both ends and a long shaft in the middle. The shaft is divided into two parts. Conveying section A and dewatering section B; Conveying section A adopts a double-ended continuous screw 13, and the helical blades of the double-ended continuous screw 13 are two whole continuous helical blades (ie, double-ended continuous helical blades) mirror-symmetrically arranged around the axis. 13a, 13b); the dehydration section B (extrusion section) adopts an intermittent spiral (also called the broken tooth spiral 14), and the spiral blades of the intermittent spiral (the broken tooth spiral 14) are single-piece, two by two. A group of intermittently arranged, two helical blades of each group (that is, the broken-tooth helical blades 14a, 14b) are arranged mirror-symmetrically with the axis as the center; segment and the discontinuity 11 without helical blades (there is a discontinuity 11 between two adjacent helical segments); when the material is continuously pushed forward, it reaches the discontinuity 11, because the discontinuity 11 has no helical surface (no helical blade) , Therefore, the material accumulates at the discontinuity 11 until it accumulates to a certain extent, and when sufficient pressure is formed, it will continue to be pushed to the next helical section (the place where the helical blade is provided on the screw shaft 29 of the dehydration section B). Due to the existence of the discontinuity 11, the discontinuous screw (broken tooth screw 14) has a higher working speed, and can adapt to changes in feed speed and feed concentration. The drop is of great significance; that is to say, in view of the uneven concentration of manure, the spiral discontinuous shaft can adjust the state of the sludge in the dewatering body through the special structure of the discontinuous shaft part (the existence of the discontinuity 11), and reduce the water content of the sludge. On the other hand, the intermittent screw (broken tooth screw 14) can handle viscous and other difficult-to-handle materials.

(2) The dehydration section B (extrusion section) adopts an intermittent spiral, because its spiral blades are monolithic and intermittent in groups (sections and sections) set separately (intermittently), so it is also called intermittent spiral. Tooth helix 14; each helical blade of each group of broken tooth helix 14 has two front and rear fractures (ie, front and rear ends), and the material is between the rear fracture of the former helical blade and the front fracture of the latter helical blade The discontinuity of the 11 gathers to form a "soft extrusion" area. Only when the materials are squeezed with each other to achieve sufficient pressure can the materials be pushed forward and conveyed, thus greatly improving the dehydration effect. However, such a structure also makes it easy for long fibers, coarse fibers or other debris to hang at the fractures and discontinuities of the spiral blades, and the continuous enrichment of materials leads to difficulty or no material discharge. The broken-tooth screw 14 is optimized at the feed end fracture of each helical blade, and each screw blade of each group of the broken-toothed screw 14 (ie, the broken-tooth helical blades 14a, 14b) is provided with a front feed end fracture. The sharp blade 12 has a cutting function, and the sharp blade 12 (cut) can effectively cut off long fibers and other sundries when rotating, preventing the machine from being blocked and stuck.

(3) The conveying section A adopts the double-head continuous screw 13 to increase its effective compression area, enhance the axial conveying capacity, and achieve the purpose of rapid discharge.

The shaft of the screwing screw shaft 29 and the double-ended continuous helix 13 and the broken tooth helix 14 on the shaft are all made of stainless steel. The two continuous spiral blades of the double-ended continuous spiral 13 in the conveying section A are welded and fixed on the shaft. In the dewatering section B, the two spiral blades of each group of the tooth-breaking spiral 14 are welded and fixed on the shaft.

There are convex teeth 15 on the inner wall of the screen barrel 25 of the dewatering section. The convex teeth 15 are just embedded in the discontinuity 11 of the discontinuous helix (broken tooth helix 14). blocked.

As shown in Figures 6 and 7, the flocculation mixing tank 3 (existing) includes a mixing tank body 31, a stirring paddle 32, a stirring deceleration motor 33, a dosing pipe 34, and an overflow regulating pipe 35; the stirring paddle 32 is vertical The upper end of the stirring paddle 32 is connected to and driven by the stirring deceleration motor 33; the upper part of the mixing tank body 31 is provided with a dosing pipe 34, which is connected with the dosing equipment. The upper part of one side of the mixing tank body 31 is provided with a mud feeding box 36, and the outlet of the pipeline pump 5 is connected with the mud feeding port 38 (flange) of the flocculation mixing groove 3 through the mud feeding pipe 37; the mud feeding box 36 of the flocculation mixing groove 3 The bottom is provided with a mud inlet 38 and an overflow port 39; the mud inlet box 36 is provided with an overflow adjustment pipe 35, the bottom of the overflow adjustment pipe 35 is an overflow port 39, and the overflow port 39 is connected with the overflow pipe ; The upper part of the other side of the mixing tank tank body 31 is provided with a mud outlet 40, which is connected to the feed port 66 of the screw dewatering body 6 (screw stacking machine).

The working principle of the flocculation mixing tank 3: the sludge and the liquid medicine are fully mixed and conditioned in the flocculation mixing tank 3 by stirring; the stirring paddle 32 adopts the inclined blade type, which helps the mud medicine to be fully mixed and dissolved quickly; the stirring paddle 32 The rotating speed is controlled at 29RPM to 35RPM by the stirring geared motor 33 (the geared motor driven by the frequency converter); the sludge and the liquid medicine are fully mixed and flocculated in the flocculation mixing tank 3 by stirring, and the sludge is prevented from precipitation; the stirring paddle 32 The straight-plate stirring paddle or the large-area inclined-blade stirring paddle is used, which is helpful for flocculation; the stirring gear motor 33 is a gear motor driven by a frequency converter and has the function of speed regulation; by adjusting the rotation speed, the mixing effect of the muddy water and the chemical can be effectively improved , effectively improve the flocculation effect under different conditions; the sludge and liquid medicine are in the flocculation mixing tank 3 by the way of bottom-in and top-out to prolong the flocculation time of the sludge medicine; form ideal flocs, and then enter the screw stacker (stacker The dehydration body 6) is used to separate mud and water. The level of the liquid level in the mixing tank body 31 is ensured by the position of the overflow regulating pipe 35, so as to adjust the flocculation effect.

As shown in FIG. 8 , the screw stacking dehydration body 6 (the screw stacking machine, which is the existing one) includes the screw stacking dehydration deceleration motor 61 , the back pressure plate 62 , the screw stacking screw shaft 63 , the dehydration segment ring piece 64 , the concentration segment ring piece 65 and the feeding port 66; one end of the stacking screw shaft 63 is connected with the stacking screw dehydration deceleration motor 61; the other end of the stacking screw shaft 63 is provided with a feeding port 66; The dehydration section behind the concentration section is provided with a dehydration section ring 64; on the screw shaft 63, a back pressure plate 62 is arranged behind the dehydration section.

The stacked screw dehydration body 6 is composed of a fixed ring and a floating ring stacked on each other and a stacked screw shaft 63 passing through it. The first half is the concentration section, and the second half is the dehydration section. The sludge enters the inside of the stacking screw dewatering body 6 from the feeding port 66; passes through the first half of the concentrating segment ring 65, the sludge is concentrated by the action of gravity; and then passes through the second half of the dewatering segment ring The change of the wheelbase of the screw shaft 63 and the action of the back pressure plate 62 generate internal pressure to achieve the effect of dehydration. After dehydration in the dehydration section, a mud cake with a moisture content of 80% is formed for external transportation, the clarified liquid flowing out of the concentration section is treated and discharged, and the concentrated liquid flowing out of the dehydration section is returned to the flocculation mixing tank for reprocessing (the filtrate in the concentration section is relatively clear; dehydration The pressure in the section is relatively large, and it is easy to leak mud, and the filtrate in the dewatering section is not so clear).

There is a PLC controller in the electric control cabinet 4; the screw pressure dehydration deceleration motor 21, the screw stacking dehydration deceleration motor 61, and the stirring deceleration motor 33 are all connected with the output end of the PLC controller; the screw pressure dehydration deceleration can be automatically controlled by the PLC controller. The operation of the motor 21 , the screw dehydration deceleration motor 61 , and the stirring deceleration motor 33 realize the automatic operation of the whole set of solid-liquid separation equipment (specialized machine for aquaculture pretreatment).

Claims (10)

1. A solid-liquid separation device for the breeding industry is characterized by comprising a dehydration device, a dehydration device rack, a flocculation mixing tank, an electric control cabinet and a pipeline pump; the dewatering equipment comprises a spiral squeezing dewatering body and a spiral stacking dewatering body; the spiral squeezing dehydration body and the spiral folding dehydration body are obliquely arranged on the dehydration equipment frame; the flocculation mixing tank is arranged beside the frame of the dewatering equipment; the filtrate outflow port of the spiral squeezing dewatering body is connected with the sludge inlet of the flocculation mixing tank through a pipeline pump; a sludge outlet of the flocculation mixing tank is connected with a feed inlet of the screw-stacking dehydration body;

the screw pressing conveying shaft of the screw pressing dehydration body, namely the screw pressing screw shaft, adopts a structure of a double-screw propulsion shaft and an intermittent shaft: the screw pressing screw shaft comprises shaft heads at two ends, a conveying section and a dewatering section in the middle; the conveying section adopts a double-head continuous spiral, and the spiral blades of the double-head continuous spiral are two whole continuous spiral blades which are arranged in a mirror symmetry mode by taking the shaft as the center; the dewatering section adopts an interrupted screw, also called a broken tooth screw, the screw blades of the interrupted screw are in a single-piece type, two screw blades are arranged in a group, and the two screw blades of each group are arranged in a mirror symmetry mode by taking the shaft as the center; that is, the dewatering section of the screw pressing shaft comprises a screw section provided with screw blades and a discontinuity part without the screw blades; each helical blade of each broken tooth helical group has a front fracture and a rear fracture; the front end fracture of each helical blade of each broken tooth helical group is provided with a sharp cutting edge.

2. The solid-liquid separation equipment for aquaculture industry of claim 1, wherein the screw pressing dehydration body comprises the screw pressing screw shaft, and further comprises a screw pressing dehydration speed reduction motor, a back pressure spring, a back pressure conical head, a conveying section sieve barrel, a dehydration section sieve barrel, a feeding hose, an overflow hose and a feeding connecting plate; the conveying section sieve barrel and the dewatering section sieve barrel are arranged on the frame and are sequentially arranged at the front and rear positions in the middle of the spiral squeezing dewatering body; the upper end of the front part of the screen barrel of the conveying section is provided with a feed inlet, and the lower part of the tail end of the screen barrel of the dewatering section is provided with a sludge outlet; two ends of the screw pressing screw shaft are arranged on a bearing seat through a bearing, and the bearing seat is arranged on the rack; the conveying section and the dewatering section of the screw pressing screw shaft are respectively positioned on the central axis in the conveying section sieve barrel and the dewatering section sieve barrel; the tail end of the screw pressing screw shaft is connected with a screw pressing dehydration speed reducing motor, and a spring top plate, a back pressure spring and a back pressure conical head are sequentially arranged close to the inner side; the spring top plate is fixed on the frame, and the back pressure conical head is connected with the back pressure spring; the feeding connecting plate is fixedly arranged at the front end of the spiral squeezing dehydration body and is provided with an upper flange port and a lower flange port, wherein the upper part is a sludge inlet, and the lower part is an overflow port; a feed port at the upper end of the front part of the screen barrel at the conveying section is connected with a sludge inlet on a feed connecting plate through a feed hose; an overflow port below a feed port at the upper end of the front part of the conveying section sieve barrel is connected with an overflow port on the feed connecting plate through an overflow hose; the overflow hose is arranged below the feeding hose.

3. The solid-liquid separation equipment for aquaculture of claim 2, wherein the inner wall of the screen barrel of the dewatering section is provided with convex teeth, and the convex teeth are just embedded in the intermittent parts of the intermittent screw.

4. The solid-liquid separation equipment for the aquaculture industry of claim 2, wherein the screen mesh of the screen barrel of the dewatering section and the screen barrel of the conveying section has a filtering precision, namely the aperture size of the screen mesh is 0.5-0.75 mm.

5. The solid-liquid separation equipment for the aquaculture industry of claim 1, 2, 3 or 4 wherein dehydration equipment guard plates are mounted on both sides of the dehydration equipment frame.

6. Solid-liquid separation equipment for aquaculture according to claim 1, 2, 3 or 4, characterized in that the dewatering equipment comprises one screw press dewatering body and one or more stacked screw dewatering bodies.

7. The solid-liquid separation equipment for the aquaculture industry of claim 1, 2, 3 or 4, wherein the flocculation mixing tank comprises a mixing tank body, a stirring paddle, a stirring motor, a dosing pipe and an overflow regulating pipe; the stirring paddle is vertically arranged in the center of the mixing tank body; the upper end of the stirring paddle is connected with and driven by a stirring motor; the upper part of the mixing tank body is provided with a dosing pipe which is connected with dosing equipment; the upper part of one side of the tank body of the mixing tank is provided with a sludge inlet tank, and the outlet of the pipeline pump is connected with the sludge inlet of the flocculation mixing tank through a sludge inlet pipe; the bottom of the sludge inlet box of the flocculation mixing tank is provided with a sludge inlet and an overflow port; an overflow adjusting pipe is arranged on the sludge inlet box, the bottom of the overflow adjusting pipe is provided with an overflow port, and the overflow port is connected with an overflow pipe; the upper part of the other side of the mixing tank body is provided with a sludge outlet which is connected with the feed inlet of the spiral shell stacking dehydration body.

8. The solid-liquid separation equipment for the aquaculture industry of claim 7 wherein the paddles are straight or large area pitched blade paddles rotating at 20-40 RPM; the stirring speed reducing motor is a speed reducing motor driven by a frequency converter.

9. The solid-liquid separation equipment for the aquaculture industry of claim 1, 2, 3 or 4, wherein the spiral stacking dehydration body comprises a spiral stacking dehydration speed reduction motor, a back pressure plate, a spiral stacking shaft, a dehydration section ring sheet, a concentration section ring sheet and a feeding hole; one end of the spiral shaft is connected with a spiral dewatering speed reducing motor; the other end of the spiral shaft is provided with a feed inlet; a concentrating section is arranged on the side close to the feeding port on the spiral shaft and is provided with a concentrating section ring sheet; the dehydration section is arranged behind the concentration section and is provided with a dehydration section ring sheet; a back pressure plate is arranged behind the dewatering section on the spiral shaft of the spiral stacking machine.

10. The solid-liquid separation equipment for the aquaculture industry of claim 1, 2, 3 or 4, wherein a PLC controller is arranged in the electric control cabinet; the screw pressing dehydration speed reducing motor, the screw folding dehydration speed reducing motor and the stirring speed reducing motor are all connected with the output end of the PLC.

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