A V-groove parallel scraper extractor

Abstract

The present invention relates to a V-groove parallel scraper extractor, wherein an annular chain is provided in the inner cavity of a box body, and scrapers are evenly installed on the annular chain, and the scrapers extend transversely along the box body, and the box body is provided with an inclined bottom wall with a high head end and a low tail end, and a driving shaft is provided at the upper part of the head end of the box body, and a driving sprocket is installed on the driving shaft; a tensioning shaft is provided at the upper part of the tail end of the box body, and a tensioning sprocket is installed on the tensioning shaft; a driven shaft is provided at the lower part of the tail end of the box body, and a driven sprocket is installed on the driven shaft; the annular chain is sequentially wrapped around the driving sprocket, the tensioning sprocket and the driven sprocket to form a triangle including a horizontal section, a vertical section and an inclined section, and the inclined section is parallel to the inclined bottom wall of the box body, and an extracting liquid is stored at the bottom of the box body to form an immersion pool, and the lower part of the inclined section is immersed in the immersion pool. The extractor alternately performs immersion extraction and spray extraction, which can ensure that the liquid can penetrate the powdered material, can meet large-scale industrial production, and realize "universal" extraction.

Description

Technical Field

[0001] The invention relates to an extraction device, in particular to a V-groove parallel scraper extractor, in particular to the extraction of powdered materials and high-powder solid materials, realizing the separation of solutes and solids, and belonging to the technical field of extraction equipment. Background Art

[0002] There are many types of extraction equipment on the market, including fixed bed type, moving bed type, basket type and cartridge type. The general principle is that the solids naturally accumulate into a stable bed or are forced to form a stable bed, and the extraction liquid or washing liquid is poured in from above the bed, and the liquid penetrates the material layer to complete the mass transfer process.

[0003] This type of equipment has requirements for the particle size of solid materials. Solid materials should be in bulk or flake form. There should be a certain gap between particles after stacking. Usually, the porosity needs to reach more than 10% to facilitate the penetration of extraction liquid or washing liquid. When the powder in the solid material is too large, the porosity of the material bed is insufficient. When the porosity is lower than 5%, the penetration rate will decrease or no penetration will occur, such as the leaching of fish meal, rice bran, rapeseed cake, tea seed cake, tea seed cake and palm kernel cake.

[0004] In addition, there are requirements for the physical and chemical properties of solids and liquids. Some solid components are miscible with liquid components to form viscous substances, which clog the filter or grid, resulting in reduced or unsustainable extraction or washing process effects, and require frequent cleaning and maintenance, such as soy concentrate protein extraction.

[0005] The white bean flakes or low-denaturation expanded materials used as the raw materials for processing soybean protein concentrate contain 8-10% high-powder debris, which cannot be processed through conventional leaching processes and must be screened out and treated as waste materials, resulting in low economic returns for the material, poor sales, and capital occupation.

[0006] There is a type IV extractor on the market now. Four inclined and parallel scrapers are installed in the same box. The upper scraper transports the material downward and soaks it in the extraction liquid. After reaching the bottom of the scraper, the lower scraper lifts the material upward. After rising to a certain height, it falls into the upper layer of the next scraper. In this way, the four scrapers repeatedly lift and fall, which prolongs the extraction time and path. However, the following problems still exist:

[0007] 1. The scrapers at all levels are arranged in sequence along the axis of the length of the box, similar to a long snake, which makes the equipment longer and has higher requirements on the length of the workshop;

[0008] 2. Most of the solid materials are in laminar contact with the extract, and are not fully mixed with the extract;

[0009] 3. The extract flows by gravity through the drop, the light phase is located at the top of the liquid layer, and the new solution is prone to short circuit;

[0010] 4. The above reasons lead to insufficient extraction power and low extraction efficiency;

[0011] 5. The extraction path seems to be long, but the material falling from the previous scraper directly falls into the area below the liquid surface of the upper scraper of the next level. Only a short path is used for immersion extraction, without draining and spraying extraction process. There is no material above the middle of the upper scraper, and the upper screen surface utilization rate of each group of leaching units is very low;

[0012] 6. The final extraction unit uses an upper scraper to transport materials upwards. Only the upper screen surface is the working surface, and the lower layer is empty and useless.

[0013] 7. Sprockets are set at the upper and lower ends of each scraper, with multiple shaft systems and complex drives, which can easily lead to mechanical failures. Summary of the invention

[0014] The purpose of the present invention is to overcome the problems existing in the prior art and provide a V-groove parallel scraper extractor, which alternately performs immersion extraction and spray extraction, has high penetration efficiency, can ensure that the liquid can penetrate the powdered material, can meet large-scale industrial production, and is widely applicable to most fish meal, rice bran, rapeseed cake, tea seed cake, oil sand ore and other oil or oil-containing materials, thereby realizing "universal" extraction.

[0015] In order to solve the above technical problems, a V-groove parallel scraper extractor of the present invention comprises a box body, the inner cavity of the box body is provided with an annular chain, scrapers are evenly installed on the annular chain, the scrapers extend laterally along the box body, the box body is provided with an inclined bottom wall with a high head end and a low tail end, a driving shaft is provided at the upper part of the head end of the box body, and a driving sprocket is installed on the driving shaft; a tensioning shaft is provided at the upper part of the tail end of the box body, and a tensioning sprocket is installed on the tensioning shaft; a driven shaft is provided at the lower part of the tail end of the box body, and a driven sprocket is installed on the driven shaft; the annular chain is sequentially wrapped around the driving sprocket, the tensioning sprocket and the driven sprocket to form a triangle including a horizontal section, a vertical section and an inclined section, the inclined section is parallel to the inclined bottom wall of the box body, an extraction liquid is stored at the bottom of the box body to form a soaking pool, and the lower part of the inclined section is immersed in the soaking pool.

[0016] As an improvement of the present invention, a spray section, a drain section and a blanking section are sequentially arranged along the forward direction of the horizontal section of the circular chain, a spray pipe is arranged above the spray section, an extraction liquid distribution trough extending laterally along the box body is arranged below the spray hole of the spray pipe, a liquid-permeable grid is arranged below the circular chain of the spray section and the drain section, and a draining blanking trough is arranged below the circular chain of the blanking section.

[0017] As a further improvement of the present invention, the box body is provided with a plurality of mutually parallel longitudinal partitions to divide the inner cavity of the box body into a plurality of leaching units, and the leaching units are arranged side by side in the transverse direction of the box body; each leaching unit is provided with the annular chain, and the scraper on each annular chain matches the width of the corresponding leaching unit; a conveying auger extending transversely along the box body is provided below the horizontal section of the annular chain near the rear end of the box body, and the two ends of the conveying auger extend outside the box body respectively, and one end of the conveying auger is provided with a feed port opening upward, and the other end is provided with a discharge port opening downward; the upper part of the cylinder body of the conveying auger located in the box body is open, and the discharge of the draining and dropping trough of each leaching unit falls into the auger trough of the conveying auger respectively, and the bottom of the conveying auger is provided with a plurality of auger dropping ports corresponding to each level of immersion pools one by one, and the dropping of each auger dropping port respectively enters the next level of immersion pools so that adjacent leaching units are connected in series in sequence.

[0018] As a further improvement of the present invention, a draining slide is provided at the lower end of each draining trough, the lower end of each draining slide is inclined toward the discharge port, and the projection of each draining slide on the bottom of the conveying auger covers the auger discharge port of this level.

[0019] As a further improvement of the present invention, an immersion chute inclined toward the discharge port is provided below each auger discharge port, and each immersion chute guides the material to the middle area of ​​the corresponding immersion tank.

[0020] As a further improvement of the present invention, each auger discharge port is located above the upper level immersion pool, the middle section of each immersion chute passes through the hole of the corresponding longitudinal partition or the side wall of the box, and the lower end of each immersion chute points to the middle area of ​​the immersion pool of this level.

[0021] As a further improvement of the present invention, an oil hopper is provided at the lowest point of the bottom wall of the soaking tank of each leaching unit, and a filter grating is provided at the upper port of each oil hopper. The outlet of each oil hopper is connected to the inlet of the extraction liquid circulation pump, and the outlet of each extraction liquid circulation pump is connected to the inlet of the spray pipe of this level through the extraction liquid circulation pipe.

[0022] As a further improvement of the present invention, each of the longitudinal partitions is provided with a partition overflow port, and the closer to the feed port, the lower the overflow height of the partition overflow port; the spray pipe of the leaching unit near the discharge port is also connected to the new solution supply pipe.

[0023] As a further improvement of the present invention, each of the baffle overflow ports is provided with a C-shaped guide groove for guiding the extraction liquid to the lower part of the soaking tank, and the opening of each C-shaped guide groove is welded to the longitudinal baffle.

[0024] As a further improvement of the present invention, the overflow ports on adjacent longitudinal partitions are alternately staggered in the length direction of the box body, so that the overflow paths of adjacent leaching units are S-shaped.

[0025] As a further improvement of the present invention, the free ends of the scrapers are respectively provided with scraper folds bent in the forward direction, and the scrapers are evenly and densely covered with fish scale holes.

[0026] As a further improvement of the present invention, the box body is stacked with at least two layers in the height direction, the conveying directions of the conveying augers in two adjacent layers are opposite, and the discharge port of the upper conveying augers is connected to the feed port of the lower conveying augers through a vertical interlayer chute.

[0027] As a further improvement of the present invention, the liquid level heights of adjacent leaching units in each box body decrease in turn in the lateral direction of the box body, the immersion liquid level near the discharge port is the highest, and the leaching units with high liquid levels overflow to the adjacent leaching units with low liquid levels in turn, and the leaching unit with the highest liquid level in the bottom box body is provided with a new solution supply pipe, which is connected to the inlet of the spray pipe of the same unit; the leaching unit with the lowest liquid level in each layer of the box body transports the extract to the leaching unit with the highest liquid level in the upper layer of the box body through an extract delivery pump or through a cross-layer oil pipe connected to the extract circulation pipe.

[0028] Compared with the prior art, the present invention has achieved the following beneficial effects: 1. It is suitable for leaching various high-powder materials, reducing powder waste, improving the utilization rate and economic value of oil-containing materials such as fish meal, rice bran, rapeseed cake and tea seed cake, and can also improve the utilization value of oil sands and tailings, eliminate environmental pollution, and can be used for "universal" extraction of most oil-containing powders;

[0029] 2. Make full use of the width of the box, set up multiple leaching units side by side, each leaching unit is equipped with an annular scraper, and the annular scrapers are arranged side by side. Adjacent leaching units are horizontally transported by conveying augers. Adjacent leaching units are arranged in parallel in space, forming a series process in the extraction process. Multi-stage extraction greatly saves space occupation and reduces the supporting feeding equipment;

[0030] 3. During the extraction process at each level, the powder is fed by both the scraper in translation and the auger in spiral. The powder is stirred and turned over many times, so that the powder can be fully soaked by the extraction liquid when it falls into the soaking tank, forming soaking extraction; after being taken out of the soaking tank, it is sprayed with the extraction liquid, so that the extraction liquid around the powder is frequently renewed, avoiding the agglomeration of the powder and the inability of the powder agglomerate to contact the extraction liquid;

[0031] 4. The liquid level of the primary soaking tank is the lowest, and the concentration of the extract is the highest. The new powder with the highest oil content first enters the primary soaking tank for extraction by the concentrated solution; the powder with slightly higher oil content enters the intermediate soaking tank for extraction by the second fresh extract; the liquid level of the final soaking tank is the highest, and the concentration of the extract is the lowest. The powder with the lowest oil content to be discharged is extracted by the freshest dilute solution; the material and the extract flow in the opposite direction, always maintaining a large extraction power, which greatly improves the leaching efficiency of the powdered material; for equipment of the same volume, under the condition of the same extract feed amount, when processing materials of the same mass, the residual oil (or solute) content in the solid residue is low, and the solute recovery rate is high;

[0032] 5. The extraction process has been improved. Traditional extraction is a simple process of scooping out, soaking, scooping out again, and soaking again. The material moves along the length of the box and is only pushed by the scraper. The scraper has almost no stirring effect on the material. In addition, the material soaking time is relatively short and cannot be fully soaked. There is no draining and spraying process. The relative movement speed between the solid phase and the liquid phase is low, the solid-liquid contact surface is in a stagnant state, and the relative flow between the liquid and the liquid is insufficient. The light phase (dilute solution) floats on the liquid surface, and a short circuit is bound to occur when overflowing;

[0033] The present invention is an all-round extraction, and each leaching unit includes soaking, draining, spraying, and draining again, so as to realize full-effect extraction under turbulent state; the drained material is horizontally transported to the next-level soaking tank by the conveying auger, and in the horizontal transportation process, the material is fully turned over after two droppings and multiple turnings by spiral blades, and the powder mass is loosely reconstructed, thereby improving the extraction effect;

[0034] 6. The extraction process includes not only soaking at the bottom of the box, but also eluting and draining the upper screen surface. The single leaching unit process is complete, avoiding the defect of poor permeability of materials and extracts in a single soaking process;

[0035] 7. Equipped with an extraction liquid circulation pump, the extraction liquid is forced to circulate in the oil bucket, the material on the sieve can be fully eluted by the extraction liquid, and the filtered mixed liquid is mixed evenly in the oil bucket to avoid the extraction liquid short circuit phenomenon;

[0036] 8. The mixed oil (extract) flows in both vertical and horizontal S-shaped flows between the leaching units, which can prevent the extract from short-circuiting;

[0037] 9. A single extractor is equipped with three, four or five-stage immersion tanks. Two extractors can be stacked in series to complete six, eight or ten-stage immersion. They can also be flexibly matched according to process requirements or material characteristics to complete large-scale industrial extraction. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The accompanying drawings are only provided for reference and explanation and are not intended to limit the present invention.

[0039] Figure 1 It is a front view of the V-groove parallel scraper extractor of the present invention;

[0040] Figure 2 for Figure 1 A top view of

[0041] Figure 3 for Figure 1 Left view of

[0042] Figure 4 A longitudinal cross-sectional view of a V-groove parallel scraper extractor according to the present invention;

[0043] Figure 5 It is a transverse cross-sectional view of the first embodiment of the V-groove parallel scraper extractor of the present invention;

[0044] Figure 6 It is a transverse cross-sectional view of the second embodiment of the V-groove parallel scraper extractor of the present invention;

[0045] Figure 7 It is a three-dimensional diagram of the V-groove parallel scraper extractor of the present invention when multiple layers are stacked.

[0046] In the figure: 1. Box body; 1a. Longitudinal partition; 1a1. Partition overflow port; 1a2. C-shaped guide groove; 1b. Exhaust port; 2. Ring chain; 2a. Spraying section; 2b. Draining section; 2c. Blanking section; 2d. Vertical section; 2e. Inclined section; 3. Scraper; 3a. Scraper folding edge; 4. Driving shaft; 4a. Driving sprocket; 4b. Driving sprocket; 5. Tensioning shaft; 5a. Tensioning sprocket; 6. Driven shaft; 6a .Driven sprocket; 7.Spray pipe; 8.Extraction liquid distribution trough; 9.Conveying auger; 9a.Feeding port; 9b.Auger discharge port; 9c.Immersion chute; 9d.Discharge port; 10.Drainage chute; 10a.Drainage slide; 11.Oil hopper; 11a.Filter grid; 12.Extraction liquid circulation pump; 13.Extraction liquid circulation pipe; 14.Main reduction motor; 15.Auger reduction motor; 16.Vertical interlayer chute. DETAILED DESCRIPTION

[0047] In the following description of the present invention, the directions or positional relationships indicated by terms such as "up", "down", "front", "back", "left", "right", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not mean that the device must have a specific direction.

[0048] like Figures 1 to 5As shown, the V-groove parallel scraper extractor of the present invention comprises a box body 1, an inner cavity of the box body 1 is provided with an annular chain 2, scrapers 3 are evenly installed on the annular chain 2, the scrapers 3 extend transversely along the box body, the box body 1 is provided with an inclined bottom wall with a high head end and a low tail end, a driving shaft 4 is provided at the upper part of the head end of the box body 1, and a pair of driving sprockets 4b are installed on the driving shaft 4; a tensioning shaft 5 is provided at the upper part of the tail end of the box body 1, and a pair of tensioning sprockets 5a are installed on the tensioning shaft 5; a driven shaft 6 is provided at the lower part of the tail end of the box body 1, and a pair of driven sprockets 6a are installed on the driven shaft 6; the annular chain 2 is sequentially wrapped around the driving sprocket 4b, the tensioning sprocket 5a and the driven sprocket 6a to form a triangle including a horizontal section, a vertical section 2d and an inclined section 2e, the inclined section 2e is parallel to the inclined bottom wall of the box body 1, and an extraction liquid is stored at the bottom of the box body 1 to form a soaking pool, and the lower part of the inclined section 2e is immersed in the soaking pool. The top of the box body 1 is provided with an exhaust port 1b or a spare port.

[0049] The shaft end of the driving shaft 4 is provided with a driving sprocket 4a, which is driven by the main reduction motor 14 through a chain. The outer periphery of the scraper 3 turning at the driving shaft 4 and the driven shaft 6 is provided with an enveloping arc section, which facilitates the scraper 3 to push the powder forward at the turning point.

[0050] The endless chain 2 is triangular in shape, and the wrap angles on the driving sprocket 4b, the tensioning sprocket 5a and the driven sprocket 6a are relatively large, the number of meshing teeth is large, the contact stress of the sprocket is small, the wear of the chain roller and the sprocket tooth profile is light, and the single-axis drive can make the endless chain 2 run smoothly.

[0051] The length of the horizontal section is usually four to five times the length of the vertical section 2d, and the length of the inclined section 2e is even longer. Both the horizontal section and the inclined section 2e are effective working sections for pushing materials. The vertical section 2d does not transport materials, and its length accounts for only about one tenth of the total length of the ring chain 2, making the extractor's working efficiency very high.

[0052] A spray section 2a, a drain section 2b and a blanking section 2c are arranged in sequence along the forward direction of the horizontal section of the circular chain. A spray pipe 7 is arranged above the spray section 2a. An extraction liquid distribution trough 8 extending laterally along the box body is arranged below the spray hole of the spray pipe 7. Liquid-permeable grids are arranged below the circular chain 2 of the spray section 2a and the drain section 2b. A draining blanking trough 10 is arranged below the circular chain 2 of the blanking section 2c.

[0053] An oil hopper 11 is provided at the lowest point of the bottom wall of the soaking tank of each leaching unit, and a filter grid 11a is provided at the upper end of each oil hopper 11. The outlet of each oil hopper 11 is connected to the inlet of an extraction liquid circulation pump 12, and the outlet of each extraction liquid circulation pump 12 is connected to the inlet of the spray pipe 7 of this stage through an extraction liquid circulation pipe 13.

[0054] The material falling into the immersion tank is subjected to immersion extraction. The main reduction motor 14 drives the driving sprocket 4a to rotate through the chain. The driving sprocket 4a drives the ring chain 2 to rotate through the driving shaft 4 and the driving sprocket 4b. The scraper 3 on the ring chain 2 goes up along the inclined bottom wall of the box body, scoops out the powder at the bottom of the immersion tank, and climbs up along the inclined bottom wall. After passing the driving sprocket 4b, the powder enters the liquid-permeable grid of the spray section 2a.

[0055] The extract passes through the material layer and the filter grid plate 11a spread at the bottom of the soaking tank, is pumped out by the extract circulation pump 12, and is injected into the spray pipe 7 of this level through the extract circulation pipe 13. The spray pipe 7 extends along the length direction of the box body. The liquid outlet of the spray pipe 7 enters the multi-channel extract distribution trough 8. Each extract distribution trough 8 extends along the transverse direction of the box body, spraying the material layer of the spray section 2a to achieve spray extraction. After the extract is leached and filtered on the material layer on the permeable grid plate, it falls into the soaking tank below, and then circulates and is pumped out by the extract circulation pump 12. After the material continues to move forward and leaves the spray section 2a, it enters the draining section 2b, and the mixed oil absorbed by the material is gradually drained. At the end of the permeable grid plate is the material drop section 2c, and the material falls into the draining drop trough 10 to complete the extraction of this level. The powder is fully in contact with the extract, and the extract around the powder is frequently updated, which avoids the concentrated solution retention or difficulty in diffusion around the powder, which is conducive to the extraction and improves the extraction efficiency.

[0056] The box is provided with a plurality of longitudinal partitions 1a parallel to each other to divide the inner cavity of the box into a plurality of leaching units, and each leaching unit is arranged side by side in the transverse direction of the box; each leaching unit is provided with an annular chain 2, and the scraper 3 on each annular chain 2 matches the width of the corresponding leaching unit; a conveying auger 9 extending transversely along the box is provided below the horizontal section of the annular chain near the rear end of the box. Both ends of the conveying auger 9 extend outside the box respectively, and the core shaft driving end of the conveying auger 9 is driven by an auger reduction motor 15, and the base of the auger reduction motor 15 is welded to the outer wall of the box.

[0057] One end of the conveying auger 9 is provided with a feed port 9a opening upward, and the other end is provided with a discharge port 9d opening downward; the upper part of the cylinder of the conveying auger 9 located in the box is open, forming a U-shaped auger groove with an upper end open. The lower end of the draining and dropping trough 10 of each leaching unit is respectively aligned with the auger groove of the conveying auger 9, and the bottom of the conveying auger 9 is provided with a plurality of auger dropping ports 9b corresponding to each level of soaking pool, and the dropping of each auger dropping port 9b enters the soaking pool of the next level in sequence, so that the adjacent leaching units are connected in series in sequence.

[0058] The raw material enters the conveying auger 9 from the feed port 9a, and the auger reduction motor 15 drives the core shaft and the screw belt of the conveying auger 9 to rotate, pushing the raw material to move horizontally along the box body, and falls into the first-stage immersion tank from the first auger drop port for first-stage immersion extraction. After being fished out from the first-stage immersion tank, the first-stage spray extraction is performed, and then the material falls back from the first-stage drain drop trough into the auger trough of the conveying auger 9, and continues to move to the next-stage leaching unit under the push of the screw belt, and falls into the second-stage immersion tank from the second auger drop port for Secondary immersion extraction, after being fished out from the secondary immersion pool, secondary spray extraction is carried out, then the material falls back from the secondary drain chute into the auger trough of the conveying auger 9, continues to move forward under the push of the screw belt, falls into the third immersion pool from the third auger discharge port, and undergoes tertiary immersion extraction, after being fished out from the tertiary immersion pool, tertiary spray extraction is carried out, then the material falls back from the tertiary drain chute into the auger trough of the conveying auger 9, and is extracted step by step as follows until the material is discharged from the discharge port 9d of the conveying auger 9.

[0059] A single extractor can be equipped with two, three, four or five-stage immersion tanks, which can be set according to process requirements.

[0060] The lower end of each draining trough 10 is provided with a draining slide 10a, and the lower end of each draining slide 10a is inclined toward the discharge port 9d, so that the material of the draining trough 10 of this stage is directed to the direction of the next soaking pool, and is transported by the conveying auger 9 to the next leaching unit, and falls from the auger discharge port of the next stage into the soaking pool of the next stage, and is extracted step by step, and the material of the last draining trough 10 is discharged from the discharge port 9d. The projection of each draining slide 10a at the bottom of the conveying auger 9 covers the auger discharge port 9b of this stage, which can prevent the material entering the conveying auger 9 from the draining trough 10 of this stage from falling from the auger discharge port 9b of this stage.

[0061] Under each auger discharge port 9b, there is provided an inlet chute 9c inclined toward the discharge port 9d, and each inlet chute 9c guides the material to the middle area of ​​the corresponding soaking tank. Each auger discharge port 9b of the conveying auger 9 is biased toward the direction of the feed port 9a. The inlet chute 9c guiding the material to the middle area of ​​the soaking tank is provided by utilizing the clearance between the auger discharge port 9b and the liquid surface of the soaking tank. After the material falls from the auger discharge port 9b, it flows down along the inlet chute 9c and falls into the middle area of ​​the soaking tank. Under the disturbance of the liquid and the scraper 3, the material is spread on the inclined bottom wall in a semi-fluidized state.

[0062] Each longitudinal partition 1a is provided with a partition overflow port 1a1. The closer to the feed port 9a, the lower the overflow height of the partition overflow port 1a1, and the high liquid level overflows to the low liquid level step by step. The leaching unit close to the discharge port 9d is the final stage, and the leaching unit close to the feed port 9a is the primary stage. The new solution supply pipe is connected to the spray pipe 7 of the final stage, and the new solution is injected to participate in the spraying of the final stage; the fresh extract can also be directly injected into the final soaking tank to dilute the extract of the final stage. The closer to the primary stage, the concentration of the extract increases step by step.

[0063] Each baffle overflow port 1a1 is provided with a C-shaped guide groove 1a2, and the opening of each C-shaped guide groove 1a2 is welded on the longitudinal baffle 1a. The C-shaped guide groove 1a2 guides the extract to the lower part of the soaking tank to avoid short-circuit overflow from the top, so that the extract flows in an S shape in the height direction.

[0064] The partition overflow ports 1a1 on adjacent longitudinal partitions 1a are alternately staggered in the length direction of the box body, and the distance between the partition overflow ports 1a1 of adjacent leaching units is increased, so that the overflow paths of adjacent leaching units flow in an S-shaped return flow, and the overflowing extract can be fully mixed with the extract in the immersion tank to avoid short circuit on the horizontal path.

[0065] Since the particle size of the powder is very small, after being soaked in the extracting liquid, it is easy to form a fluidized state of solid-liquid mixture, and it is not easy to be scooped out from the soaking pool by the scraper 3 and moved to the upper layer for draining. The present invention provides a scraper fold 3a bent in the forward direction at the free end of the scraper 3, which is conducive to holding the fluidized material. The scraper 3 is evenly and densely covered with fish scale holes, which can cover the material and facilitate the extraction liquid to seep out during spraying and draining to accelerate the draining.

[0066] In the usual practice, each auger discharge port 9b is located above the current soaking tank, and the material flows down the inlet chute 9c for a short distance to reach the middle area of ​​the soaking tank; however, this brings the following problems: since the distance between the drain discharge chute 10 and the conveying auger 9 is relatively short, a large angle must be set between the drain slide 10a and the vertical plane to cover the current auger discharge port 9b, making the slope of the drain slide 10a small. When the material flows up and down the relatively flat drain slide 10a, it is easy to be retained and not easy to be discovered. The retained material is easy to mold, etc., causing material pollution and affecting product quality.

[0067] like Figure 6 As shown, the present invention adopts the following measures to solve the problem that the draining slide 10a is too flat. By taking advantage of the relatively high clearance between the bottom of the conveying auger 9 and the bottom of the soaking tank, each auger drop port 9b is offset towards the feed port 9a by a distance, thereby extending the length of each soaking chute 9c. In this way, the coverage width of the draining slide 10a becomes narrower and can be set steeper to ensure that no material is retained and the extraction quality is guaranteed.

[0068] Each auger feed opening 9b can be completely located above the upper soaking pool, and the auger feed opening 9b corresponding to the first soaking pool is located outside the side wall of the box body, close to the feed opening 9a, and the middle section of the first soaking chute passes through the hole in the side wall of the box body, and the lower end of the first soaking chute points to the middle area of ​​the first soaking pool;

[0069] The auger discharge port 9b corresponding to the second-stage immersion tank is located above the first-stage immersion tank, the middle section of the second-stage immersion chute passes through the hole of the first-stage longitudinal partition, and the lower end of the second-stage immersion chute points to the middle area of ​​the second-stage immersion tank;

[0070] The auger discharge port 9b corresponding to the third-stage immersion tank is located above the second-stage immersion tank, the middle section of the third-stage immersion chute passes through the hole of the second-stage longitudinal partition, and the lower end of the third-stage immersion chute points to the middle area of ​​the third-stage immersion tank. In this way, the drain slide 10a is steeper, and the angle between it and the vertical plane can be less than 20°, and the safety distance between the lower end of the drain slide 10a and the auger discharge port 9b is longer, which can be greater than 90mm.

[0071] like Figure 7 As shown, when a single extractor cannot meet the extraction requirements, two or more layers can be stacked up and down, and the feeding directions of the two adjacent layers of conveying augers 9 are opposite. The discharge port 9d of the upper conveying augers is connected to the feed port 9a of the lower conveying augers through a vertical interlayer chute 16.

[0072] Taking the three-stage extraction of each layer as an example, the new material enters from the feed port 9a on the right side of the upper extractor, and is discharged from the discharge port 9d on the left side of the upper extractor after the first three stages of extraction, and flows down through the vertical interlayer chute 16 to the feed port 9a on the left side of the lower extractor, and is discharged from the discharge port 9d on the right side of the lower extractor after the last three stages of extraction, and so on. Flexible settings can be made according to process requirements or material characteristics to complete large-scale industrial extraction.

[0073] The liquid level heights of adjacent leaching units in each box body decrease in turn in the transverse direction of the box body, the immersion liquid level near the discharge port 9d is the highest, and the leaching units with high liquid levels overflow to the adjacent leaching units with low liquid levels in turn. The leaching unit with the highest liquid level in the bottom box body is provided with a new solution supply pipe, which is connected to the inlet of the spray pipe 7 of the same unit; the leaching unit with the lowest liquid level in each layer of the box body delivers the extract to the leaching unit with the highest liquid level in the upper layer of the box body through an extract delivery pump or through a cross-layer oil pipe connected to the extract circulation pipe 13.

[0074] The new solution first enters the sixth-level immersion tank with the highest liquid level in the lower extractor, and overflows to the fifth-level immersion tank and the fourth-level immersion tank in turn. Then, the extractant delivery pump or the cross-layer oil pipe flows to the third-level immersion tank with the highest liquid level in the upper extractor, and overflows to the second-level immersion tank and the first-level immersion tank in turn. The reverse flow of the extractant and the material is achieved between the upper and lower extractors and between each level of the extractors on the same layer, maintaining the maximum extraction power and the highest extraction efficiency.

[0075] The present invention can be used for leaching powdered materials and materials with high powder content. It can solve the bottleneck of preparing soybean protein concentrate and cottonseed protein concentrate, overcome the problems of poor material permeability, easy dissolution of protein and sugar to block the grid plate, shallow leaching material layer, large equipment investment, low production efficiency, high system failure rate, etc. For powdered scraps that cannot be processed in traditional leaching processes, such as high-powder-content soybean white bean flakes and semi-denatured puffed powder, the V-groove parallel scraper leacher of the present invention can be used to extract such materials and process them into concentrated protein, which can greatly improve the economic value of such materials and enhance the economic benefits and market competitiveness of enterprises.

[0076] It can be used for oil-containing materials such as fish meal, rice bran, rapeseed cake and tea seed cake to improve their utilization rate and economic value; it can be used for pressing palm kernel cake for leaching, and when the thickness of the rolled embryo is appropriate, the palm kernel can be directly leached, with low equipment investment and easy use; it can be widely used in the processing of most oil or oil-containing materials to achieve "universal" extraction.

[0077] Taking the treatment of oil-based mud used in oil exploration drilling as an example, oil-based mud contains aromatic substances. Oil-based mud contains a large amount of diesel and aromatic substances, which are highly toxic. During drilling construction, a large amount of oil-containing mud will be produced incidentally, which must be harmlessly treated. If the base oil in the oil-containing mud is recycled, on the one hand, it can reduce exploration costs and material losses, and at the same time eliminate environmental pollution, which is a two-pronged approach. Traditionally, the centrifugal drying method is used, which can reduce the moisture content to 12% at most, and it is difficult to completely eradicate the toxicity of the mud. Using this leacher extraction, 99% of the base oil and aromatic substances can be recovered, achieving complete and thorough harmless treatment of contaminated soil, and recovering high-value base oil at the same time. When treating oil-containing soil, if the average oil content in the soil reaches 20%, 198kg of base oil can be recovered for every ton of soil treated. The treatment cost per ton is 100-200 yuan / ton, which can generate direct economic benefits of 750-800 yuan.

[0078] The above description is only a preferred embodiment of the present invention, and does not limit the scope of patent protection of the present invention. In addition to the above embodiments, the present invention may also have other implementations. Any technical solution formed by equivalent replacement or equivalent transformation falls within the protection scope required by the present invention. The technical features not described in the present invention can be realized by or using existing technologies, and will not be repeated here.

Claims

1. A V-groove parallel scraper extractor, comprising a box, an inner cavity of the box is provided with an annular chain, scrapers are evenly installed on the annular chain, and the scrapers extend transversely along the box, characterized in that: The box body is provided with an inclined bottom wall with a higher head end and a lower tail end, a driving shaft is provided at the upper part of the head end of the box body, and a driving sprocket is installed on the driving shaft; a tensioning shaft is provided at the upper part of the tail end of the box body, and a tensioning sprocket is installed on the tensioning shaft; a driven shaft is provided at the lower part of the tail end of the box body, and a driven sprocket is installed on the driven shaft; the annular chain is sequentially wrapped around the driving sprocket, the tensioning sprocket and the driven sprocket to form a triangle including a horizontal section, a vertical section and an inclined section, the inclined section is parallel to the inclined bottom wall of the box body, an extraction liquid is stored at the bottom of the box body to form a soaking pool, and the lower part of the inclined section is immersed in the soaking pool; A spraying section, a draining section and a blanking section are sequentially arranged along the forward direction of the horizontal section of the ring chain, a spraying pipe is arranged above the spraying section, an extracting liquid distribution trough extending transversely along the box body is arranged below the spray hole of the spraying pipe, a liquid permeable grid is arranged below the ring chain of the spraying section and the draining section, and a draining blanking trough is arranged below the ring chain of the blanking section; The box body is provided with a plurality of mutually parallel longitudinal partitions to divide the inner cavity of the box body into a plurality of leaching units, and the leaching units are arranged side by side in the transverse direction of the box body; each leaching unit is provided with the annular chain, and the scraper on each annular chain matches the width of the corresponding leaching unit; a conveying auger extending transversely along the box body is provided below the horizontal section of the annular chain near the rear end of the box body, and the two ends of the conveying auger extend outside the box body respectively, and one end of the conveying auger is provided with a feed port opening upward, and the other end is provided with a discharge port opening downward; the upper part of the cylinder body of the conveying auger located in the box body is open, and the discharge of the draining and dropping trough of each leaching unit falls into the auger trough of the conveying auger respectively, and the bottom of the conveying auger is provided with a plurality of auger dropping ports corresponding to each level of immersion pools one by one, and the dropping of each auger dropping port respectively enters the next level of immersion pools to connect adjacent leaching units in series in sequence.

2. The V-groove parallel scraper extractor according to claim 1, characterized in that: The lower end of each draining and discharging trough is respectively provided with a draining slide, the lower end of each draining slide is respectively inclined toward the discharge port, and the projection of each draining slide on the bottom of the conveying auger covers the auger discharging port of this level.

3. The V-groove parallel scraper extractor according to claim 2, characterized in that: An immersion chute inclined toward the discharge port is provided below each auger discharge port, and each immersion chute guides the material to the middle area of ​​the corresponding immersion tank.

4. The V-groove parallel scraper extractor according to claim 3, characterized in that: The material discharge port of each auger is respectively located above the immersion tank of the previous level, the middle section of each immersion chute passes through the hole of the corresponding longitudinal partition or the side wall of the box, and the lower end of each immersion chute points to the middle area of ​​the immersion tank of this level.

5. The V-groove parallel scraper extractor according to claim 1, characterized in that: An oil hopper is provided at the lowest point of the bottom wall of the soaking tank of each leaching unit, and a filter grid is provided at the upper port of each oil hopper. The outlet of each oil hopper is connected to the inlet of the extraction liquid circulation pump, and the outlet of each extraction liquid circulation pump is connected to the inlet of the spray pipe of this level through the extraction liquid circulation pipe.

6. The V-groove parallel scraper extractor according to claim 1, characterized in that: Each of the longitudinal partitions is provided with a partition overflow port, and the closer to the feed port, the lower the overflow height of the partition overflow port; the spray pipe of the leaching unit close to the discharge port is also connected to the new solution supply pipe.

7. The V-groove parallel scraper extractor according to claim 1, characterized in that: A C-shaped guide groove is provided at the overflow port of each partition plate to guide the extraction liquid to the lower part of the soaking tank, and the opening of each C-shaped guide groove is welded to the longitudinal partition plate.

8. The V-groove parallel scraper extractor according to claim 1, characterized in that: The overflow ports on adjacent longitudinal partitions are alternately staggered in the length direction of the box body, so that the overflow paths of adjacent leaching units are S-shaped.

9. The V-groove parallel scraper extractor according to claim 1, characterized in that: The free ends of the scrapers are respectively provided with scraping material folding edges bent in the forward direction, and the scrapers are evenly and densely covered with fish scale holes.

10. The V-groove parallel scraper extractor according to claim 1, characterized in that: The box body is stacked with at least two layers in the height direction, the conveying directions of the conveying augers of two adjacent layers are opposite, and the discharge port of the upper conveying augers is connected with the feed port of the lower conveying augers through a vertical interlayer chute.

11. The V-groove parallel scraper extractor according to claim 1, characterized in that: The liquid level heights of adjacent leaching units in each box body decrease in turn in the lateral direction of the box body, the immersion liquid level near the discharge port is the highest, and the leaching units with high liquid levels overflow to the adjacent leaching units with low liquid levels in turn, and the leaching unit with the highest liquid level in the bottom box body is provided with a new solution supply pipe, which is connected to the spray pipe inlet of the same unit; the leaching unit with the lowest liquid level in each layer of the box body transports the extraction liquid to the leaching unit with the highest liquid level in the upper layer of the box body through an extraction liquid delivery pump or through a cross-layer oil pipe connected to the extraction liquid circulation pipe.

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