JPH0683759U - Fine powder separator for miscella in oil extractor - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a fine powder separating device for a miscella in an oil extractor that removes fine powder that tends to be generated by using an oil and fat raw material such as rice bran. [Structure] A scraper 9 for sliding traveling is arranged on a smooth conveying surface 4 for receiving the oil / fat raw material fed from the raw material hopper 2, and the oil / fat raw material that moves at an appropriate layer height by this scraper 9 is used for the ceiling portion of the casing 1. The solvent to be sprayed is permeated through the solvent pipe 8 which is piped to the oil pipe to extract the oil, and the miscella in which the oil and the solvent are mixed is received by the plurality of miscella hoppers 7 below through the smooth transport surface 4, and the hoppers 7 of In an oil extractor in which the miscella is used as a solvent at the near side and the near side miscella hopper 7 is made into a dense miscella, an arc-shaped screen 15 is vertically provided at the inner center of the end miscella hopper 7'becomes a fine powder separating device. The feed header 17 on the vertical casing 12 which is installed and divided into two chambers, front and rear, is connected, and the rich miscella flowing into the feed header 17 is connected to the guide tube 1
The liquid is sprayed from 8 through the nozzle 16 onto the screen surface 14a of the arcuate screen 15 to allow only liquid to pass therethrough, block fine powder from passing through, and drop downward to separate.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention also relates to a fine powder separator for miscella in an oil extractor for extracting oil from soybeans, rapeseed, and other plant seeds, particularly rice bran oil and fat raw materials.

[0002]

[Prior art]

 Generally, oils and fats such as soybeans, rapeseed, other plant seeds, and rice bran are sprayed with a solvent such as hexane, and the solvent permeates the oils and fats to extract the oils and obtain a mixture of oils, a so-called miscella oil. Various types of extractors are known. In this case, there is a continuous extraction device in which the structure of the extraction device is not complicated and the extraction device main body is relatively compact, and there is, for example, the oil and fat extraction device presented by the applicant of the present application (Japanese Patent Publication No. 2-53480).

This is because the oil / fat raw material supplied to the raw material hopper is once received and accumulated in a fixed smooth conveying surface located below, and is accumulated in a pile, and is moved forward with a predetermined height by a scraper that slides on the smooth conveying surface. Then, during this movement, the solvent sprayed from the upper solvent pipe is permeated into the oil / fat raw material to extract the oil, and the miscella mixed with the oil is dropped through the slits on the smooth transport surface, and the multiple oils are placed below. The configuration is such that the individual hoppers for the miscella will receive them one after another. In this case, for the solvent flowing into the solvent pipe, the miscella accumulated in the miscella hopper is pumped up and the circulating solvent is used as the solvent used at the front position.

[0004]

[Problems to be solved by the device]

 However, in order to use the miscella accumulated in the miscella hopper as a solvent, the fine powder in the miscella inevitably increases when the oil and fat raw material is a fine material such as rice bran, and in the miscella hopper at the end, This is one of the causes of troubles in the process, as the proportion of fine powder increases and the refining yield in the next process (refining process) decreases. As a means for solving this defect, it is also considered to equip a fine powder separating means such as filtering fine powder each time when pumping up through each micella hopper, but in this way, a separating means is provided for each hopper. To install it, the size of the entire device is inevitable, and maintenance is extremely troublesome. For this reason, it has not been put to practical use.

In view of the above situation, the present invention solves the above problems by spraying a miscella on an arc-shaped screen body in a casing separately installed behind the hopper for the end miscella to forcibly separate the liquid and fine powder. The purpose of the present invention is to provide a fine powder separation device for a miscella in an oil extractor that is a countermeasure against fine powder.

[0006]

[Means for Solving the Problems]

 In the present invention, in the airtight case, the oil / fat raw material supplied to the raw material hopper is stored on the lower fixed smooth transport surface, and this oil / fat raw material is moved forward with a scraper running on the smooth transport surface at an appropriate layer height. During the movement of the oil / fat raw material, the miscella that permeates the solvent sprayed from above and becomes the solvent containing the oil is sequentially received by the multiple hoppers for miscella arranged below through the slits on the smooth transport surface. In an oil extractor that pumps each miscella whose concentration has been increased toward the front side hopper and uses it as the solvent at the front position to obtain a high concentration miscella at the frontmost hopper on the smooth transport surface, from the end miscella hopper. The discharge processing pipe is connected to the diverting feed header of the vertical casing, and the injection nozzles of the plurality of guide tubes branching and projecting from the feed header are connected to It is installed along the arc surface at the upper end position of the arc-shaped screen body vertically mounted in the center of the housing, and the casing below the arc-shaped screen body is divided into the liquid recovery hopper part and the fine powder recovery hopper part. is there.

[0007]

[Action]

 As described above, the oil / fat raw material charged in the raw material hopper is temporarily stored on the smooth conveying surface, and the scraper traveling on the smooth conveying surface moves to the front side which is the solvent spraying process side with a predetermined layer height and moves from the solvent pipe on the ceiling side. The spraying solvent is poured into the oil / fat raw material, the oil content in the oil / fat raw material is extracted with the solvent, and the miscella, which has become the solvent containing this oil, is dripped in sequence onto multiple hoppers for miscella through the slits on the smooth transport surface. The miscella accumulated in each miscella hopper is pumped up to the solvent pipes at the front position and used as the solvent to be used. For this reason, the concentration of the miscella that accumulates toward the miscella hopper on the raw material feeding side (front side) increases, and the concentrated miscella accumulated in the hopper at the end is guided to the miscella fine powder separator to separate fine powder and liquid. That is, the rich miscella introduced from the miscella hopper flows into the feed header of the vertical fine powder separation device for miscella, flows from the feed header into the injection nozzle, and ejects the miscella from the injection nozzle into an arc-shaped screen body. When sprayed onto the screen surface, only the liquid (oil, solvent) passes through the net-type screen surface and flows outward, and the fine powder that cannot pass through the screen surface slides down along the inner arc. That is, the liquid and the fine powder are reliably separated.

[0008]

【Example】

 The present invention will be described below with reference to the drawings of the embodiments.

Reference numeral 1 denotes a rectangular casing having an airtight tank structure, which is a main body of an apparatus, in which a tower-shaped raw material hopper 2 is provided at one end and a discharge hopper 3 is provided at a lower end of the other end. A fixed type smooth conveying surface 4 for transporting oil and fat materials and for dropping a miscella is laid, and a scraper 6 that rotates with an endless rotating chain 5 runs on the smooth conveying surface 4, and A plurality of miscella hoppers 7 having a funnel-shaped tank structure are continuously provided in the lower longitudinal direction, and a pumping pipe 9 connected to an outlet 7a at the bottom of each miscella hopper 7 is connected to the miscella hopper. 7 is a circulation pipe that is sequentially connected to a solvent pipe 8 that is laterally piped on the housing ceiling portion 1a that is located directly above the miscella hopper 7 and that is mainly composed of an oil extractor. Reference numeral 10 denotes a fine powder separation device for miscella, which is arranged at the tip end side of the processing pipe 11 connected to the outlet 7a of the misper hopper 7'of the end of the plurality of miscella hoppers 7 for accumulating rich miscella. The fine powder separating apparatus 10 for la has a structure in which an arc-shaped screen body 15 formed by a rectangular cartridge frame 13 having a side arc and a net screen 14 is vertically mounted in the center of the inside of a vertical casing 12 and two chambers in the front and rear are provided inside the casing. A plurality of miscella injection nozzles 16 are located at the upper edge 15a of the arcuate screen body 15, and are located on the extension line of the arcuate end of the arcuate screen body 15 and the nozzle port 16a is screened. Each of them is mounted so as to face the inside of the surface 14a, and the base end of each miscella injection nozzle 16 protruding outside the casing is laterally arranged on the outer top of the casing 12. Before and after the curved screen body 15 is located at the lower end of the casing 12 to which the curved tip ends of the guide tubes 18 made of a plurality of flexible tubes branchingly projecting from the miscella inlet feed header 17 are connected. A liquid recovery hopper section 19 and a fine powder recovery hopper section 20 are formed at the positions. Reference numeral 21 is a nozzle setting tool for holding the tip of the miscella injection nozzle 16 and reference numeral 22 is a ball valve interposed at the base end of the guide tube 18. Further, the tip of the processing pipe 11 is connected to the back of the miscella feed header 17.

Explaining this action, first, the oil / fat raw material (substance to be extracted) A which has been subjected to a predetermined pretreatment is put into the raw material hopper 2 from the screw conveyor 23 and sequentially received by the lower smooth conveying surface 4, and the raw material hopper 2 The deposition state is reached up to the middle position. Here, the oil / fat raw material A is fed out to a predetermined layer height by a scraper 6 that slides on the smooth conveying surface 4, and is forwarded to the solvent spraying process side.

As described above, the solvent B such as hexane sprayed from the solvent pipe 8 at the ceiling portion passes through the inclined uniform spray plate 24 on the oil / fat raw material A that has moved to the front of the smooth transport surface 4 in the solvent spray step. Pour (sprinkle) evenly. The solvent B permeates the oil / fat raw material A to extract the oil, and the miscella C in which the oil and the solvent are mixed is formed between the plurality of wedge wires 4a having a triangular cross section which constitute the smooth transport surface 4. It is dropped from the slit 4b and is successively accumulated in the hopper 7 for the miscella below.

In this case, the miscella C accumulated in the miscella hopper 7 is pumped up from the outlet 7a provided at the funnel-shaped bottom part to the pumping pipe 9 by a predetermined amount so that the miscella hopper 7 is located in front of the miscella hopper 7. The solvent is fed to the solvent pipe 8 located directly above the micella hopper 7 and used as the solvent. That is, since the miscella C of each miscella hopper 7 is refluxed to be used as the solvent for the solvent pipe 8 of the adjacent miscella hopper 7, the plurality of miscella hoppers 7 have a smooth conveying surface 4 on which new raw materials are fed. The concentration is gradually increased toward the base side of, and the thickest miscella C is accumulated in the miscella hopper 7'for the end. However, since the amount of the fine powder b that has passed through the slit 4b of the smooth conveying surface 4 is gradually increasing in the miscella C, a predetermined fine powder separating operation is performed without directly sending the powder to the next purification step. I have to ask.

Here, the rich miscella C collected in the terminating miscella hopper 7 ′ is guided through a processing pipe 11 to a feed header 17 arranged above the fine powder separation device 10 for miscella, and the feed header 17 It is pressure-fed to the miscella injection nozzle 16 through a plurality of guide tubes 18 branchingly provided from 17.

Here, since the nozzle opening 16a of the nozzle 16 which is directed obliquely downward is located inside the screen surface 14a of the arc-shaped screen body 15, the miscella C ejected from this nozzle 16 is a liquid (oil, oil, Only the solvent a passes through the net screen 14, flows out to the outside of the arcuate screen body 15, and flows into the liquid recovery hopper section 19. On the other hand, the fine powder b in the miscella C, which could not pass through the screen surface 14a, falls along the inner arc of the screen surface 14a and accumulates in the differential recovery hopper 20 below. Therefore, the liquid a from which the fine powder b has been separated may be sent to the purification step of distillation.

By the way, in the miscella using rice bran, when the screen surface has an arc shape of R760 mm, the injection pressure from the nozzle may be 1 to 2 kg.

[0016]

[Effect of device]

 As described above, the fine powder separating device for the miscella in the oil extractor of the present invention is such that the arcuate screen body is vertically mounted in the vertical casing connected to the rear part of the micella hopper at the end, and the inside is vertically divided into two parts. Since the miscella is sprayed by the nozzle along the arc surface of the screen of the screen body, only the liquid (oil, solvent) passes through the screen, and the fine powder contacts the screen. Then, it becomes a kind of filtration state and remains inside the arc, and slides down along the arc. That is, the liquid and the fine powder can be easily and reliably separated only by ejecting the miscella onto the arc-shaped screen body. For this reason, since no countermeasures against fine powder are taken for each miscella hopper, it is possible to prevent the overall size of the oil extractor from increasing in size and to increase the yield of the refining process. Moreover, since the present invention has a simple structure in which the arc-shaped screen body and the nozzle are combined, it can withstand long-term use without causing troubles such as clogging during use and malfunctions. Of course, by appropriately selecting the arc angle of the arc-shaped screen body according to the raw material used, practical effects such as not causing clogging can be obtained.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of an oil extractor equipped with a fine powder separating device for a miscella according to the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is an enlarged cross-sectional view of a main part of a fine powder separating device for a miscella.

FIG. 4 is a partially cutaway front view of the fine powder separating apparatus for the miscella.

[Explanation of symbols]

 1 Case 2 Raw Material Hopper 4 Smooth Transport Surface 6 Scraper 7 Hopper for Miscella 8 Solvent Pipe 11 Processing Pipe 12 Vertical Casing 15 Circular Screen Body 16 Miscella Jet Nozzle 17 Feed Header 18 Guide Tube 19 Liquid Recovery Hopper 20 Fine Powder Recovery Hopper part

Claims (1)

[Scope of utility model registration request] 1. An oil / fat raw material supplied to a raw material hopper is stored in a fixed smooth conveying surface below in an airtight casing, and the oil / fat raw material is moved forward by a scraper traveling on the smooth conveying surface to a proper layer height. Then, while moving the oil and fat raw material, the solvent sprayed from above is permeated and the miscella that becomes the solvent containing the oil is sequentially received by the multiple hoppers for miscella arranged below through the slits on the smooth transport surface, and from this side hopper. In an oil extractor that pumps each miscella whose concentration has been increased toward the front hopper and uses it as the solvent at the front position to obtain a high-concentration miscella at the frontmost hopper on the smooth transport surface, from the end miscella hopper. The discharge processing pipe is connected to the diverting feed header of the vertical casing, and the injection nozzles of the plurality of guide tubes branching from the feed header are connected to the casing. Oil that is installed along the arc surface at the upper end position of the arc-shaped screen body vertically mounted in the center of the single chamber, and divides the casing below the arc-shaped screen body into the liquid recovery hopper part and the fine powder recovery hopper part. Fine powder separator for miscella in the extractor.