A device for processing wood chips
(57) Abstract:Usage: devices for processing wood chips. The inventive device ledges rolls taper towards the top and have a height equivalent to the desired chip thickness. 8 C. p. F.-ly. 6 Il. table 4. The invention relates to the pulp and paper industry, in particular to a device for processing wood chips.In a conventional papermaking process logs being unloaded and turned into chips, and then separated to separate the cellulose fibers from the chip for further processing and forming rolls of paper. The usual way to separate the cellulose fibers consists of vyvarki wood chips in a chemical solution at high temperatures and pressures in the digesters in order to remove lignin from the chips, which holds the fibers together. For further papermaking process, it is desirable that the obtained obuslovlyennyi fiber had essentially the same properties. To reduce getting nevyarovych or perevyazannyh chips in digesters, it is necessary that the penetration of the cooking solution in chips was the same for all St considered desirable to use the device for sorting chips, which simultaneously removes nepolnomernye and emergency chip size so that nepolnomernye can be processed separately, and excessive pass through a device designed to reduce the chip size to its vyvarki.A device used to reduce the size of excessive shavings, separated from the flow of chips through walls, is a knife for cutting chips. Basic operation of the knife for cutting is the work of the rotor drum in which an excessive amount of chips are driven under the knife and treated them to an acceptable thickness. An example of a knife for cutting chips can be knife, described in U.S. patent N 4235382, issued in the name of William C. Smith, "Method and device for grinding wood chips".The disadvantage of the invention is that the knives for cutting chips do not provide the processing chip to optimum size in those cases when they're stupid, or if not appropriate speed or load while reducing non-standard sizes tend to produce too small chips.Known interacting rolls for processing chip excessive amount of compression affecting prom for directions shavings sharp end in the fork between the rollers, with rollers, compression chips across their thickness to at least one-fifth of their original thickness, but not more than one-tenth of their original thickness. After that, the chips provide an opportunity to be heard prior to their original shape with a gap fibers in them by increasing the porosity of chips.In the well-known inventions opposite closely interacting rolls or splitting the rolls compress the chips to break them in fibers. The rolls are made smooth so that the impact on the chip was only compressive, due to which the structure of the chips varies not only to break the fibers.Chips tend to hide in the space above the rollers, and, in particular, the largest chip, who require splitting, stuck between the rollers in the upper part of the pair of rolls, and not stretched between them.Restructurirovanie or cleavage is not acceptable as a normal process due to the low performance of the splitting device and the subsequent impact on the operation vyvarki.The purpose of the invention a device for processing chip size, providing a reduction in the time required vyvarki, the STS.Another objective of the invention is to provide a device for processing an excessive amount of chips quickly and efficiently with the fast transmittance while minimizing congestion or clogging of the device.Another objective of the invention is to provide a device for the processing of wood chips, which splits or razmelchite excessive amount of chips without the formation of small shavings or chips, simple in operation, which requires minimal adjustment for optimal performance.Another objective of the invention is to provide a device for the processing of wood chips to increase the speed of impregnation solution, in particular large chips, and a device for destructuring wood chips, which would not depend on the specific orientation of the chip between closely interacting rolls.The goal is achieved by performing closely interacting opposing rotating rolls having aggressive surface. In the preferred construction the rolls have a pyramid-shaped projections made by machining on their surfaces. In the preferred exemplary embodiment, the peaks of the pyramids are located at a distance OA. When working peaks rolls can be accommodated orientations peak-to-peak or peak-to-trough. In the process, the chips are crushed in the direction of fiber orientation, and with the help of this device will be split regardless of how the chip is clamped between the rollers.The invention differs from known intended for destructuring or splitting devices that aggressive surface of the rolls is not only used for compression chips, but also to break or fracture the chip thickness.In Fig.1 shows a device for splitting wood chips; Fig.2 section a-a in Fig.1; Fig.3 the portion of the surface of one of the rolls of a device for splitting wood chips; Fig.4 a partial view from the end of one of the pairs of rolls in a device for splitting wood chips; Fig.5 different orientation of the roll; Fig.6 is the same, a different orientation of the roll.Wood chips in the device 1 is supplied with the switchgear 2, which delivers a steady stream of 3 wood chips to the pairs of upper and lower rolls 4 and 5. A pair of rolls 4 and 5 are placed in the housing 6, having a top opening 7, through which is sourced wood chips 3, and the lower hole 8, through the MIS 9 and 10 to the upper pair of 4 rolls, and the chips passing through the upper pair of rolls, shall be sent by the blades 11 and 12 on the lower pair of rolls 5. The transporting mechanism transports the processed chips from device 1 on the following stages of the process.The upper pair of rolls 4 includes rollers 13 and 14, located close to the opposed rotating so that the upper recess between the rollers surface moved to the narrow area formed by closely interacting rollers 13 and 14, as shown by the arrows 15 and 16.The lower pair of rolls 5 includes rollers 17 and 18, closely spaced and opposed rotating so that the upper recess between the rollers surface passed to the narrow area formed by closely spaced rollers 17 and 18, as shown by the arrows 19 and 20.Each of the rolls 13, 14, 17, 18 rotates in bearings 21, for rotation of the rolls is provided a drive mechanism 22. The drive mechanism 22 includes a motor 23 or other source of energy and drive gear 24. The drive gear 24 drives each of the rollers, however, it is sometimes necessary to give effect to only one roller of each pair of rolls. Smooth roller in each pair of rolls, opposed rotating the roll position can be blank, which is only one roller of each pair. When the chips are received in the device and wedged between the rotating and non-rotating rolls, non-rotating roller will rotate, contributing to the splitting and passing through the wood chips.Distribution mechanism 22 includes a housing 25 having an aperture 26 for receiving the chips from the feeder chips, switch screw 27 for flow equalization chips along the distribution mechanism and distribution grid 28 through which the chips pass with the distribution mechanism 22 to the first pair of rolls 4. Distribution auger 27 is driven by an appropriate power source 29 and rotates in bearings 30 in the housing 25.In known installations, use only one pair of rolls or more than two pairs of rolls, and mechanism for feeding chips on a pair or pairs of rolls may be of other types than the distribution mechanism 2 described above.The surface of the rolls used in the present invention, differ from the surfaces of the rolls used for splitting chips earlier, the fact that the surface of the rolls have an aggressive path. In the exemplary embodiment shown in Fig. 3, the surface of the roll is the basis witheringly V-shaped grooves 32 and axial V-shaped grooves 33 on the roll at right angles. By performing a mechanical processing such intersecting grooves on the surface of the roll is formed of a quadrilateral pyramid, lying radially outward. Each of the protrusions 31 has a peak 34 formed by the remaining material of the outer parts of the machined surface of the roll, and the base 35, the limited depth of the intersecting grooves 32 and 33 in the material area of the machine. Usually both roll roll pairs have the same surface configuration, but you can have one of Valka in each pair smooth or to have a more aggressive or less aggressive contour than the contour of the surface of the other roll in the roll pair.In one embodiment, the structure was formed, the surface of the roll at which the peaks 34 was placed at a distance from each other in a half inch and each peak had a smooth surface about one-sixteenth of an inch squared. The depth of each pyramid peak 34 to the base was 35 mmWhen the use and operation of the device for destructuring wood chips, shavings served on a distribution mechanism 2, and the distribution mechanism 2 is uniformly along the axial length of the first pair of rolls 4. Entering on raspredeliteli, separated in the previous step, sorting, or the entire flow of chips to be recycled into wood pulp in the device.Possible separation from the flow of chips only nepolnomernyh size and then processing chip unsuitable size and the appropriate size by means of the proposed device.The device can skip a large amount of chips, providing the ability to handle the entire flow of chips in the car with the exception of dropping excessive shavings. When passing through the device unsuitable size of the chips, there is no need to separate the unsuitable chips for separate processing. Small chips passing through the respective rollers will pass through the raw device and in this case, the split will only unsuitable chip size. After treatment acceptable and excessive size of chips processed chips will be equally meet the educational process wood pulp.With distribution mechanism 2 chips are in an area over a pair of rolls. The rollers may be rotated separately, and their positions are controlled so that they were aligned with the peaks with the orientation of the grooves as shown in the same process, where in addition to the splitting of the desirable compression, or where appropriate the chip thickness is thin, it may be desirable closely interacting ratio of peak-to-trough, as shown in Fig.6. In other operations, where the flow of energy in the device is minimized, and is driven by one roller of each roller pair and the others remain idle. When the chips are suitable to the rolls and are clamped between them, the idle roller is driven by a drive roller via a drive connection is formed sandwiched between wood shavings.When the chips pass between the pairs of rolls, regardless of orientation, the chips have a tendency to split or crack parallel to the orientation of the fibers in the chips. This happens regardless, are there chips between the rollers along or forward end.When applied orientation peak-trough, as shown in Fig.4 and 6, together with pyramidal protrusions, spaced a half inch apart from each other and a height of 6 mm, cracks appearing in the shavings, occur approximately every quarter of an inch. Emerging intermediate distance between the cracks meet acceptable to the thickness of the chips in the operations of clicks is relevant to the penetration of the solution. Rupture of the fibers, resulting compression, penetration of the solution into chips contribute to the holes created by the cracks. The displacement of the material at the crack more for thick chips than thin, and as a result, holes for penetration of the solution are less thick shavings than thin, thereby equating the rate of penetration of the solution into thick and thin shavings. Due to the fact that the rolls are at a distance from each other, the middle of the chip is not shifted, although the offset of the cracks can be significant and chips remain intact without the formation of small particles, splinters or broken chips.In those cases, when using multiple vertically arranged roller pairs, as shown in Fig.1 and 2, it is expedient to provide smaller swath of space in the lower roller pairs. In this case, excessively exceeding standard dimensions of the chip will be compressed and/or fragmentation of the upper rollers with the formation of acceptable or exceeding the minimum standard size chips that pass through them. These roller pairs will additionally be able to handle significantly larger than the standard size and the minimum is larger than the standard size Botanik one pair of rolls, on which the protrusions of adjacent rolls are in mutual engagement, as shown in Fig.6. To control one sample was not processed, while other samples were cut into pieces known machines for cutting thick shavings. Several samples have been processed so-called soft processing, and other processed hard treatment. When soft processing the distance between the protrusions in the area where the tabs with each roll have the smallest distance from each other, is 6 mm hard When processing the shortest distance between the projections of the rolls was 3 mmIn table.1 shows the characteristics of the different samples, on which the study was carried out.The samples were classified by the classifier chip SS (Prader Companie). Samples were separated on a trifle, which passes through a circular hole of 3 mm, the chip thickness from 0 to 2 mm; the acceptance of a thickness of from 2 to 8 mm; everything has a thickness more than 8 mm; the other had a thickness of more than 14 mm In table.2 shows characteristics thickness of each sample.In all samples, except those that have been chopped vertolety chips, 50% or more of the chips in each sample were greater than the maximum established acceptable thickness is remained in a laboratory digester way Kraft vyvarki. Several samples were produced by individual parties in the terms of a separate boiling cycles. One party were produced using a mixture of 15% (85% shavings from samples 3 and 4). The cooking conditions for each batch, and sample type chip described in table.3.Strength properties of the pulp were calculated after cleaning boiled mass at 30000 rpm. In table.4 shows the results.As can be seen from the table.4, the length of the break and elongation did not change under the action of the degradation process of the chip. As planed, and split the chips had the same strength characteristics. However, the performance gap, strength and tangled below for split shavings.Smaller gaps were noted among the range of grinding with minimal breaks chips when their hard processing. When mixed with breaks shavings breaks in weight from a combination of samples 3 and 4 were greater than for the broken chips (sample). Therefore, acceptable for the formation of wood pulp are considered to be mixtures of fissionable chips with conventional chips.Wood pulp from chips, processed by the device according to the invention, had minimal levels of marriage and considerably smaller than the mass of the floor Means for processing the excessive size of the chips provides obtaining suitable, acceptable wood pulp, with characteristics similar to the mass obtained from the appropriate size of the chips. The device reduces the formation of fines and defective fibers. 1. A DEVICE FOR PROCESSING WOOD CHIPS, comprising a housing with an inlet for loading the chip and the outlet for discharging the treated chips, means for flow of wood chips and its distribution along the length of the gap of a predetermined size formed between at least one pair of parallel rolls mounted in the housing for rotation, at least one pair of rolls is associated with a rotational drive, and on the surface of at least one of the rolls in the pair performed a multitude of protrusions, wherein the protrusions taper towards the top and have a height, equivalent to the desired thickness of the chip.2. The device under item 1, characterized in that the projections are made on the surface of both rolls in a pair, while the shape and location of the protrusions on the surface of one and the other rolls in the pair are identical.3. The device according to PP.1 and 2, Otley which have the shape of a regular square pyramid, which are adjacent to each other.5. The device according to PP.2 to 4, characterized in that the rolls in the pair is installed with the possibility of placing the vertices of the projections of one roll across the tops of the projections of the other roll in the gap between the rollers.6. The device according to PP.2-4, characterized in that the rolls in the pair is installed with the possibility of placing the vertices of the projections of one roll opposite to troughs of the other roll in the gap between the rollers.7. The device according to PP.2 4 and 6, characterized in that the rolls in the pair is installed with the possibility of placing the vertices of the projections of one roll in the hollows of the other roll in the gap between the rollers.8. The device according to PP. 1 and 2, characterized in that the protrusions are in the form of axisymmetric shapes and their axes arranged radially with respect to the surface of the roll.9. The device according to PP.1, wherein a distance between tops of the projections essentially equal to their height.
FIELD: technological processes.
SUBSTANCE: invention is related to metal forming and may be used to make lengthy items with ribs by means of die forming. Hydraulic press comprises bed plate with guides, where movable crosspiece is installed with upper die. Lower die is mounted on fixed crosspiece. Press is equipped with two pairs of power thrusts, which rotate on cylindrical journals. Journals are arranged at the ends of movable crosspiece. Two sliders are installed in guides by cylindrical journals. On these journals there are lower ends of power thrusts installed. Return hydraulic cylinders joined to sliders are fixed on bed plate. In order to avoid slipping of lower die versus upper one, there is teethed sector and spring-loaded rack provided. Upper and lower dies are arranged accordingly with flat and radius-convex working surfaces or accordingly radius-convex and radius-convex or concave working surfaces. Using upper die with radius-convex surface, stock is exposed to rolling action with controlled force in process of return-rolling motion of upper die.
EFFECT: invention provides for improved accuracy of die forming and improved operational characteristics of press.
4 cl, 4 dwg
SUBSTANCE: machine for finishing construction panels comprises a conveyor line designed to receive incoming housing elements of construction panels and to transport the housing elements in the working direction (F) along the group of treatment stations (A, B, C, D) in the machine. Moreover, construction products are essentially made in the form of rectangular parallelepipeds having: a base, main, side and an opposite additional main side, each of which has a relatively large contoured area; and four edge sides having a relatively small contoured area. Wherein the first treatment station (A) from said treatmentstations comprises treatment means acting in the width direction, designed for introducing, by means of gluing, a first edge strip along the first edge side, from the four edge sides, so that the first edge strip is located parallel to the base, main, side. The second treatment station (B) from said treatment stations, comprises treatment means acting in the vertical direction, designed for introducing, by means of gluing, a basic surface layer covering the entire base, main, side and the base side of the first edge strip. Thereinafter, vertical pressure is applied to the housing element and the first edge strip in the direction transverse to the working direction (F), when the housing element and the first edge strip are passed through the second treatment station, so that the basic side of the first edge strip is aligned with base, main, side of the housing element when they are passed through the second treatment station (B).
EFFECT: improving the panel finishing efficiency.
19 cl, 6 dwg
FIELD: pulp and paper industry.
SUBSTANCE: the invention presents a method of extraction of a reaction wood and-or normal wood from a nonstandard large wood chips and is intended for use in a pulp and paper industry. The invention provides for reduction of the nonstandard large wood chips to small-sized chips, their exsiccation with following mixture with water. Then the small-sized wood chips containing high density of extractive substances and having a high specific weight are settling. The settled small-sized wood chips are extracted for excretion of valuable extractive substances, in particular, lignites. The more light-weight small-sized chips floated on water surface are removed to return the normal timber for production of a paper stuff. The invention ensures a simple and economically efficient method of concentration of a gnarled timber material and-or normal timber out of a nonstandard large-scale wood chips. At that the process of concentration is so effective, that makes it economically expedient to recover the extractive substances from it.
EFFECT: the invention ensures a simple and economically efficient concentration of a gnarled and normal timber material out of a nonstandard large-scale wood chips.
8 cl, 1 dwg, 1 tbl, 3 ex
FIELD: wood-pulp and paper industry.
SUBSTANCE: fibrous material is subject to compression. Pectin-enriched areas in walls of fiber are attenuated selectively due to impregnation of fibrous material with water-based pectines-containing liquid, which results in hydrolysis of pectines. Fibrous material is divided to fibers and refined to produce wood fibrous pulp.
EFFECT: limitation of losses of outcome of fibrous pulp to level at which level decomposition of pectines occurs.
22 cl, 3 dwg, 4 tbl, 4 ex
FIELD: textile, paper.
SUBSTANCE: invention relates to preliminary treatment of raw materials at plants of wood-working and paper-and-pulp-industries. Device for continuous rinsing of chipped wood includes housing with nozzle for cleaning fluid supply, which is displaced on housing lid, spacing frame located over loading screw end, inclined unloading screw. Housing is represented as convergent nozzle and placed with clearance in external housing. External housing is represented with truncated cone. Top lid of housing is installed at tilting angle equal to unloading crew tilting angle. Inlet end of the screw is above spacing frame. Besides, screw and housing axis are located in the same plane. Invention ensures intensification of mass transfer between cleaning fluid and chipped wood with effect on device efficiency improvement.
EFFECT: improvement of continuous chipped wood rinsing efficiency.
FIELD: textile industry, paper industry.
SUBSTANCE: method (version) relates to production of paper base meant for vulcanising and parchmentising and can be used in paper-pulp industry. The method includes the following stages. Energy radiation of cellulose fiber in dry condition. Grinding and refining of irradiate fiber in aqueous media till homogeneous fiber solution is prepared. Formation of web from prepared fibrous suspension, which is dewatered and dried to prepare paper base. According to another version, after paper web forming paper base is exposed to radiation to decrease polymerisation degree of fiber.
EFFECT: development of clean and economically effective process of paper base production for vulcanising and parchmentising as well as decrease of environmental pollution.
26 cl, 4 tbl, 3 ex
SUBSTANCE: method involves a) chemical treatment of substance containing lignocellulose through an oxidative system which contains at least one non-enzymatic oxidising agent and an activator at pH ranging from approximately 2 to approximately 6.5 and b) mechanical treatment of the substance containing lignocellulose during a period time sufficient for obtaining high alpha-cellulose pulp, where the lignocellulose-containing substance is chemically treated before and/or during any stage for mechanical treatment, and where the lignocellulose-containing substance is not chemically treated at pH ranging from approximately 11.5 to approximately 14 between stages a) and b).
EFFECT: reduced energy consumption, simplification of the method without need for considerable capital investments and improved quality of the end product.
15 cl, 8 dwg, 6 ex, 6 tbl
FIELD: wood working industry.
SUBSTANCE: method includes steaming, impregnation with chemical reagents, two stages of chemical-thermal-hydrolytic treatment of wood chips, multiple grinding with extraction of steam condensates and recuperation of heat at the first stage of grinding. Soaking of ground mass in bath, washing of mass and formation of drain water flow. In zones of contact of products of chemical, chemical-thermal-hydrolytic, mechanical treatment of wood chips and/or fibrous dispersion with air of production premises, air mixture is extracted with contaminated water vapors released from products. Then drain water is saturated by this mixture. Afterwards drain water is exposed to floatation and additional biological cleaning.
EFFECT: reduced content of hazardous substances inside production premises below limit permissible concentration, reduced pollution of environment.
FIELD: textile industry.
SUBSTANCE: wood mass is deaerated. For this purpose it is steamed at the temperature of 80-100°C for removal of air from wood chips. Then steamed chips are impregnated with alkaline impregnating solution. At the same time at the stage of impregnation temperature of impregnating solution is maintained below temperature of steaming. Under these conditions alkali penetrates into wood chips. Produced mass of wood chips is ground down to desired freeness. Impregnation is carried out at excessive pressure.
EFFECT: reduced amount of alkali used for impregnation, increased light scattering of mass without increase in content of non-ground fibres and increased specific volume of mass.
14 cl, 1 dwg, 4 tbl, 2 ex
FIELD: textiles, paper.
SUBSTANCE: method involves sorting of balances with the selection of defective ones, separation from them those parts of the stem with length of 0.5-0.8 m, which are visually identified as contaminated by rot. These parts are subjected to peeling and chopping at the wood chips in a separate stream. Chips are cut and sorted on the program in accordance with a given size of chips on the length and thickness. Then all chips are crushed and sorted to obtain fractions consisting of acceptable chips in the form separated to the longitudinal fragments, and the fraction containing wood fines and particles of rot.
EFFECT: reduced duration of treatment of wood chips and reduction of power consumption during processing of pulpwood.
5 cl, 3 ex
FIELD: machine building.
SUBSTANCE: invention relates to impregnation of fibrous materials, in particular, wood, wood chips and wastes. Plant for wetting of fibrous material by proposed method with application of variable pressure comprises sealed and steam-proof body and vacuum pipeline. Note here that first two-way valve is arranged in vacuum pipeline. Said body has at least one closable bore to load and unload the body and vent pipeline. Third two-valve is arranged in said vent pipeline. Vacuum pipeline communicates with vacuum tank. Note that first two-way valve is arranged between said body and vacuum tank. In compliance with this invention, this plant incorporates pressure pipe connected with high-pressure tank. Note also that second two-way valve is arranged in said pressure line between said body and said high-pressure tank.
EFFECT: simple and efficient impregnation of wood chips or packs of wastes.
9 cl, 6 dwg
FIELD: process engineering.
SUBSTANCE: invention relates to woodwork, particularly, to production of composites, for example, wood boards. First, bark if separated from chips wood. Then chips are dried to form the ply of chips. Then, ply of ships is conveyed and compressed. Bark separation from wood is performed in two steps. At first step, bark major inclusions are separated after chips ply compression. At second step, final separation of bark is carried out at vibrating screens with balls. Chips ply compression pressure, amplitude and frequency of screens vibration is adjusted subject to ash content of chips.
EFFECT: higher quality of chips.