WO2017013282A1 - Pulp press screws with double pitch of threads - Google Patents

Pulp press screws with double pitch of threads Download PDF

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Publication number
WO2017013282A1
WO2017013282A1 PCT/ES2016/070168 ES2016070168W WO2017013282A1 WO 2017013282 A1 WO2017013282 A1 WO 2017013282A1 ES 2016070168 W ES2016070168 W ES 2016070168W WO 2017013282 A1 WO2017013282 A1 WO 2017013282A1
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WO
WIPO (PCT)
Prior art keywords
turns
propellers
sub
pulp
press
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PCT/ES2016/070168
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Spanish (es)
French (fr)
Inventor
Guillermo Garcia Gil
Original Assignee
Talleres Mercier, S.A.
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Filing date
Publication date
Application filed by Talleres Mercier, S.A. filed Critical Talleres Mercier, S.A.
Priority to EA201790607A priority Critical patent/EA035769B1/en
Publication of WO2017013282A1 publication Critical patent/WO2017013282A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
    • B30B9/12—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing
    • B30B9/121—Screw constructions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
    • B30B9/12—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing
    • B30B9/16—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing operating with two or more screws or worms
    • C—CHEMISTRY; METALLURGY
    • C13—SUGAR INDUSTRY
    • C13B—PRODUCTION OF SUCROSE; APPARATUS SPECIALLY ADAPTED THEREFOR
    • C13B10/00—Production of sugar juices
    • C13B10/08—Extraction of sugar from sugar beet with water
    • C13B10/10—Continuous processes
    • C13B10/102—Continuous processes having rotatable means for agitation or transportation
    • C—CHEMISTRY; METALLURGY
    • C13—SUGAR INDUSTRY
    • C13B—PRODUCTION OF SUCROSE; APPARATUS SPECIALLY ADAPTED THEREFOR
    • C13B10/00—Production of sugar juices
    • C13B10/08—Extraction of sugar from sugar beet with water
    • C13B10/12—Details of extraction apparatus, e.g. arrangements of pipes or valves

Definitions

  • the present invention refers to a sub-helix system with double spiral turns for use in horizontal volumetric presses with two horizontal subhelices in parallel.
  • the present invention finds its field of application in the manufacture of press machines commonly used in the sugar industry, increasing the performance of said presses, based on the optimization of the cleaning of the accumulated pulp that obstructs the filter surface preventing the water outlet, mixing and crushing of it, as well as a greater labyrinth effect of the path of the pulp as it passes through the press. That is, a geometric closure that prevents the recoil of the product when compressed.
  • the pressing performance of the depleted beet pulp in the aforementioned presses conditions the subsequent final thermal drying processes, with the consequent fuel savings.
  • this thermal drying is carried out in rotary dryers / ovens where the product is dried until it reaches around 90% of dry matter, then a final pressing in pellets is carried out, prior to its commercialization as feed for cattle .
  • the "pulp press propellers with double turns” contribute with respect to the state of the art in general and, particularly, with respect to the aforementioned invention of BABBINI & C SAS FLLI, a horizontal double helix press, where the propellers have a double pitch of turns of the same height, housed so that there is no collision between them and whose use contributes, in combination with the incorporation of a scraper / cleaner edge on the outer end of the turns that make up the propellers of the press, the following advantages or effects that result in an improvement in the total performance of the press;
  • A. Cleaning effect This effect is improved by the use of a cutting edge with appropriate geometry and which gives it a great scratching and cleaning capacity.
  • the effective edge length of the turns on the filter jacket is doubled. This implies that the cleaning of the perforation of the filter jacket that may be obstructed by the pulp during the pressing operation is doubled and that it is cleaned or uncovered when the propeller is scratched by scratching the accumulated pulp on the surface.
  • C. Crushed Effect The crushing and twisting capacity of the pulp fibers is greatly increased as there are more turns and closer to each other. This effect occurs in the central zone between the two propellers. In said area, between the spiral flanks of different propellers when rotating in the opposite direction very close to each other and when the product is trapped between said turns, squeezing, twisting and crushing of the pulp fibers very beneficial for water extraction occurs. inside.
  • D. Labyrinth effect The closing of roads through which the product can go back due to pressure differences during product compression is significantly enhanced. Thus, in the area located between the two propellers, the turns are so close that any movement of pulp between the turns or turns compartments is limited.
  • each sub-propeller is formed according to two turns or turns of turns of the same distance to the filter jacket, this being constant and being once mounted on the volumetric press, said distance between one and two millimeters to the filter or wrapping jacket It contains the pulp.
  • the spiral edge of both the first and second pass has an extension of the spire or scraper-cleaner as a hard recharge provided by abrasion-resistant welding and with a knife effect as it passes through the inside of the jacket filter, based on its termination forming an obtuse angle with the filter jacket itself, with a scratching-cleaning effect that forms the leading edge of all the turns of each of the two sub-propellers, on the face that carries out the compression on the pulp, maintaining a constant distance throughout its outer perimeter.
  • Figure 1 Main section of "Pulp press propellers with double turns”.
  • Figure 2. Main section of "Pulp press propellers with double spiral passage" inside a horizontal volumetric press with two horizontal subhelics in parallel.
  • each sub-propeller contains a second step or spiral edge (2) identical to the first step or spiral edge (1). That is to say, each sub-propeller is shaped according to two turns of turns (1, 2) introduced in a jacket (4) or longitudinal envelope, of equal constant distance in relation to the inside of the longitudinal shirt (4) itself, to position itself in its sweep on the inside of the filter jacket (4). Said minimum distance is between one and two millimeters.
  • the steps or edges of turns (1, 2) move the pulp (6) with the scraper-cleaner (5), cleaning accordingly the layer of pulp (6) that obstructs the drilled surface of the filtering jacket (4) and making a differentiation in its passage between a previous area of the filtering jacket (4) where water withdrawal is reduced (7) followed by a subsequent one where water extraction is high (8) .
  • the yields obtained in the same horizontal volumetric press with two horizontal propellers in parallel are compared by means of certified tests in a sugar bowl, using two single-step propellers, in relation to the use of the propellers subject to the present invention, evidencing an increase of dry matter between 2% and 2.5%.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biochemistry (AREA)
  • Organic Chemistry (AREA)
  • Paper (AREA)
  • Solid Fuels And Fuel-Associated Substances (AREA)
  • Apparatuses For Bulk Treatment Of Fruits And Vegetables And Apparatuses For Preparing Feeds (AREA)
  • Fodder In General (AREA)
  • Filtering Materials (AREA)
  • Food-Manufacturing Devices (AREA)
  • Confectionery (AREA)
  • Manufacturing And Processing Devices For Dough (AREA)

Abstract

The invention relates to pulp press screws with a double pitch of threads, for the use thereof in horizontal volumetric presses with two horizontal subscrews arranged in parallel and inserted into a longitudinal sleeve or envelope, common in the sugar industry, where the subscrews have a double pitch of threads at equal distance from the filtering sleeve, housed such that the two do not collide, the use thereof providing, combined with the incorporation of a scraper-cleaner edge on the outer end of the threads forming the two subscrews of the press, a substantial improvement in the yield of the assembly.

Description

Hélices de prensa pulpa con doble paso de espiras  Pulp press propellers with double turns
OBJETO DE LA INVENCIÓN La presente invención, según se expresa en el enunciado de esta memoria descriptiva, se refiere a un sistema de subhélices con doble paso de espiras para su uso en prensas volumétricas horizontales con dos subhélices horizontales en paralelo. OBJECT OF THE INVENTION The present invention, as expressed in the statement of this specification, refers to a sub-helix system with double spiral turns for use in horizontal volumetric presses with two horizontal subhelices in parallel.
La presente invención encuentra su campo de aplicación en la fabricación de máquinas de prensado de uso habitual en la industria azucarera, aumentando el rendimiento de la referidas prensas, en base a la optimización de la limpieza de la pulpa acumulada que obstruye la superficie filtrante impidiendo la salida de agua, el mezclado y el estrujado de la misma, así como un mayor efecto laberinto del recorrido de la pulpa a su paso por la prensa. Es decir, un cierre geométrico que impide el retroceso del producto al ser comprimido. The present invention finds its field of application in the manufacture of press machines commonly used in the sugar industry, increasing the performance of said presses, based on the optimization of the cleaning of the accumulated pulp that obstructs the filter surface preventing the water outlet, mixing and crushing of it, as well as a greater labyrinth effect of the path of the pulp as it passes through the press. That is, a geometric closure that prevents the recoil of the product when compressed.
ANTECEDENTES EN EL ESTADO DE LA TÉCNICA BACKGROUND IN THE STATE OF THE TECHNIQUE
A modo de introducción, las prensas volumétricas horizontales con dos hélices en paralelo fueron inventadas por la empresa noruega STORD para el prensado de restos de pescado y posterior producción de harinas de pescado. Con el paso del tiempo, se le dieron nuevas aplicaciones, entre las principales se encuentra su uso hasta nuestros días, para el prensado de la pulpa agotada de remolacha en las azucareras. By way of introduction, horizontal volumetric presses with two parallel propellers were invented by the Norwegian company STORD for pressing fish debris and subsequent production of fishmeal. With the passage of time, new applications were given, among the main ones is its use to this day, for pressing the depleted pulp of beet in the sugar factories.
Así, durante la década de los 70 las compañías STORD, BABBINI & C SAS FLLI y la propia MERCIER vinculada a la presente invención, han suministrado estas máquinas a las azucareras de todo el mundo, sin que se hayan llevado a cabo en el tiempo grandes innovaciones en su diseño; uso de hélices cónicas en vez de bicilíndricas, uso de núcleos perforados/filtrantes en las hélices e instalación de pequeñas espiras en la zona de presión, principalmente. Thus, during the 1970s, the STORD, BABBINI & C SAS FLLI and MERCIER companies linked to the present invention have supplied these machines to sugar mills around the world, without having been carried out in time. innovations in its design; use of conical propellers instead of two-cylinder, use of perforated / filter cores in the propellers and installation of small turns in the pressure zone, mainly.
En la actualidad, el rendimiento del prensado de la pulpa agotada de remolacha en las referidas prensas, condiciona los procesos posteriores de secado térmico final, con el consiguiente ahorro de combustible. Habitualmente, este secado térmico se realiza en secaderos/hornos rotativos donde se seca el producto hasta un alcanzar entorno a un 90% de materia seca, a continuación se lleva a cabo un prensado final en pellets, previo a su comercialización como pienso para el ganado. At present, the pressing performance of the depleted beet pulp in the aforementioned presses conditions the subsequent final thermal drying processes, with the consequent fuel savings. Usually, this thermal drying is carried out in rotary dryers / ovens where the product is dried until it reaches around 90% of dry matter, then a final pressing in pellets is carried out, prior to its commercialization as feed for cattle .
i Así mismo, también es importante indicar, como las referidas prensas volumétricas horizontales con dos hélices en paralelo también se utilizan para otros residuos generados en las azucareras tales como hojas y rabillos de remolacha, pulpa de achicoria, residuos de pescado, residuos cárnicos, subproductos agrícolas como soja, almidón, cítricos, alfalfa, patata, etc., tratamiento de residuos y, en general, todo tipo de productos sobre los que aporte valor el proceso de prensado que se lleva a cabo. i Likewise, it is also important to indicate, as the aforementioned horizontal volumetric presses with two parallel propellers are also used for other waste generated in the sugar factories such as beet leaves and rabillos, chicory pulp, fish residues, meat residues, agricultural by-products such as soy, starch, citrus, alfalfa, potato, etc., waste treatment and, in general, all kinds of products on which the pressing process carried out is valuable.
Atendiendo al estado de la técnica en la materia, únicamente, la patente de invención identificada por su número de publicación y título, respectivamente; EP0773100B1 "Screw press for dehydrating fibrous materials", bajo la titularidad de BABBINI & C SAS FLLI, se aporta una prensa de doble hélice en paralelo, con doble paso de espiras, donde la altura de una de las espiras es significativamente menor que la de la otra. Es decir, son hélices con un doble paso en el que se hace uso de una segunda espira de altura comprendida entre 50 y 60 mm, sustancialmente menor a la altura de la primera espira. Adicionalmente, tampoco se trata de espiras de altura total constante. According to the state of the art in the art, only, the patent of invention identified by its publication number and title, respectively; EP0773100B1 "Screw press for dehydrating fibrous materials", under the ownership of BABBINI & C SAS FLLI, a parallel double helix press is provided, with double turns, where the height of one of the turns is significantly less than that of the other. That is to say, they are propellers with a double passage in which a second turn of height between 50 and 60 mm is used, substantially less than the height of the first turn. Additionally, it is not about turns of constant total height.
A modo de conclusión la "Hélices de prensa pulpa con doble paso de espiras" aporta respecto al estado de la técnica en general y, particularmente, respecto a la referida invención de BABBINI & C SAS FLLI, una prensa de doble hélice horizontal, donde las hélices presentan un doble paso de espiras de la misma altura, alojadas de forma que no existe colisión entre ambas y cuyo uso aporta, en combinación con la incorporación de un filo rascador/limpiador sobre el extremo exterior de las espiras que conforman las hélices de la prensa, las siguientes ventajas o efectos que redundan en una mejora del rendimiento total de la prensa; By way of conclusion, the "pulp press propellers with double turns" contribute with respect to the state of the art in general and, particularly, with respect to the aforementioned invention of BABBINI & C SAS FLLI, a horizontal double helix press, where the propellers have a double pitch of turns of the same height, housed so that there is no collision between them and whose use contributes, in combination with the incorporation of a scraper / cleaner edge on the outer end of the turns that make up the propellers of the press, the following advantages or effects that result in an improvement in the total performance of the press;
A. Efecto limpieza: Se mejora este efecto por el uso de un filo con geometría apropiada y que le otorga una gran capacidad de rascado y limpiado. Además, se duplica la longitud del filo efectivo que tienen las espiras sobre la camisa filtrante. Esto implica que se duplica la limpieza de la perforación de la camisa filtrante que pueda quedar obstruida por la pulpa durante la operación de prensado y que se limpia o destapona al pasar la hélice rascando la pulpa acumulada en la superficie. A. Cleaning effect: This effect is improved by the use of a cutting edge with appropriate geometry and which gives it a great scratching and cleaning capacity. In addition, the effective edge length of the turns on the filter jacket is doubled. This implies that the cleaning of the perforation of the filter jacket that may be obstructed by the pulp during the pressing operation is doubled and that it is cleaned or uncovered when the propeller is scratched by scratching the accumulated pulp on the surface.
B. Efecto Mezclado: Se duplica la capacidad que tiene la máquina de mezclar la pulpa que llega a la zona de intersección entre las hélices donde las espiras de ambas hélices rompen los "paquetes" o volúmenes de pulpa que allí se interceptan al tratar de compartir un mismo espacio. En esta zona las espiras de ambas hélices atacan a los "paquetes" de pulpa rompiéndolos y mezclando así la pulpa. Este mezclado y reordenación de pulpa hace que las partículas no avancen en bloques de principio a fin de la máquina sin estar expuestas, las partículas de su interior, a la camisa filtrante y así poder desalojar el agua que contienen a través de esta. B. Mixed Effect: The capacity of the machine to mix the pulp that reaches the intersection zone between the propellers where the turns of both helices break the "packages" or volumes of pulp that are intercepted there when trying to share is doubled a same space. In this area the turns of both helices attack the pulp "packages" breaking them and thus mixing the pulp. This mixing and rearrangement of the pulp means that the particles do not advance in blocks from the beginning to the end of the machine without being exposed, the particles inside, to the filter jacket and thus being able to dislodge the water they contain through it.
C. Efecto Estrujado: Se incrementa considerablemente la capacidad de estrujado y retorcimiento de fibras de la pulpa al haber más espiras y más próximas entre sí. Este efecto se produce en la zona central entre las dos hélices. En dicha zona, entre los flancos de espiras de distintas hélices al rotar en sentido contrario muy próximas entre si y estando el producto atrapado entre dichas espiras, se produce un estrujamiento, retorcimiento y aplastamiento de las fibras de pulpa muy beneficioso para la extracción del agua en su interior. D. Efecto laberinto: Se potencia de forma importante el cierre de caminos por donde el producto puede retroceder por diferencia de presiones durante la compresión del producto. Así, en la zona ubicada entre las dos hélices, las espiras están tan próximas que se limita cualquier movimiento de pulpa entre los pasos o compartimentos de espiras. EXPLICACIÓN DE LA INVENCIÓN C. Crushed Effect: The crushing and twisting capacity of the pulp fibers is greatly increased as there are more turns and closer to each other. This effect occurs in the central zone between the two propellers. In said area, between the spiral flanks of different propellers when rotating in the opposite direction very close to each other and when the product is trapped between said turns, squeezing, twisting and crushing of the pulp fibers very beneficial for water extraction occurs. inside. D. Labyrinth effect: The closing of roads through which the product can go back due to pressure differences during product compression is significantly enhanced. Thus, in the area located between the two propellers, the turns are so close that any movement of pulp between the turns or turns compartments is limited. EXPLANATION OF THE INVENTION
A modo explicación de la invención de las "Hélices de prensa pulpa con doble paso de espiras", la misma consiste en un sistema de subhélices con doble paso de espiras concebida para su instalación en prensas volumétricas horizontales con dos subhélices horizontales en paralelo, donde cada subhélice incorpora las siguientes especificaciones: By way of explanation of the invention of the "pulp press propellers with double turn of turns", it consists of a system of sub-propellers with double turn of turns designed for installation in horizontal volumetric presses with two horizontal subhelices in parallel, where each Sub-helix incorporates the following specifications:
Como ya se ha anunciado, un segundo paso o filo de espiras de idéntico a un primer paso o filo de espiras, estando ambos pasos de espiras introducidos en una camisa o envolvente longitudinal, y situados de forma que no exista colisión en el recorrido libre de las espiras en la zona en la que más se aproximan las dos subhélices. Por tanto, cada subhélice se conforma según dos pasos o filos de espiras de la misma distancia a la camisa filtrante, siendo ésta constante y quedando una vez montada en la prensa volumétrica, dicha distancia comprendida entre uno y dos milímetros hasta la camisa filtrante o envolvente que contiene la pulpa. Adicionalmente, el filo de espiras tanto de primer paso como de segundo, presenta una prolongación de la espira o rascador-limpiador a modo de recargue duro aportado por soldadura resistente a la abrasión y con efecto de cuchilla a su paso por el interior de la camisa filtrante, en base a su terminación conformando un ángulo obtuso con la propia camisa filtrante, con capacidad de efecto rascador-limpiador que conforma el borde de ataque de todas las espiras de cada una de las dos subhélices, en la cara que lleva a cabo la compresión sobre la pulpa, manteniendo una distancia constante en todo su perímetro exterior. Por tanto, de forma que en el recorrido de cada espira por el interior de la camisa filtrante, exista una distancia mínima a la propia camisa filtrante comprendida entre uno y dos milímetros, optimizando el efecto de rascado-limpiado y destaponado, fundamental para que el agua pueda ser desalojada a través de la propia camisa filtrante, habitualmente limitada por la obstrucción de sus taladros al retener la propia pulpa prensada. As already announced, a second step or spiral edge identical to a first step or spiral edge, both turns being inserted into a longitudinal jacket or envelope, and positioned so that there is no collision in the free path of the turns in the area where the two sub-helices are closest. Therefore, each sub-propeller is formed according to two turns or turns of turns of the same distance to the filter jacket, this being constant and being once mounted on the volumetric press, said distance between one and two millimeters to the filter or wrapping jacket It contains the pulp. Additionally, the spiral edge of both the first and second pass, has an extension of the spire or scraper-cleaner as a hard recharge provided by abrasion-resistant welding and with a knife effect as it passes through the inside of the jacket filter, based on its termination forming an obtuse angle with the filter jacket itself, with a scratching-cleaning effect that forms the leading edge of all the turns of each of the two sub-propellers, on the face that carries out the compression on the pulp, maintaining a constant distance throughout its outer perimeter. Therefore, so that in the course of each turn through the inside of the filter jacket, there is a minimum distance to the filter jacket itself between one and two millimeters, optimizing the effect of scratching-cleaning and uncapping, essential for the Water can be dislodged through the filter jacket itself, usually limited by the obstruction of its holes by retaining the pressed pulp itself.
DESCRIPCIÓN DE LAS FIGURAS DESCRIPTION OF THE FIGURES
Para complementar la descripción que se está realizando y con objeto de ayudar a una mejor comprensión de las características de la invención, de acuerdo con unos ejemplos preferentes de realización práctica de la misma, se acompaña como parte integrante de esta descripción, un juego de figuras en las que, con carácter ilustrativo y no limitativo, se ha representado lo siguiente: To complement the description that is being made and in order to help a better understanding of the features of the invention, according to some preferred examples of practical realization thereof, a set of figures is attached as an integral part of this description. in which, by way of illustration and not limitation, the following has been represented:
Figura 1 .- Sección principal de "Hélices de prensa pulpa con doble paso de espiras". Figure 1 .- Main section of "Pulp press propellers with double turns".
Figura 2.- Sección principal de "Hélices de prensa pulpa con doble paso de espiras" en el interior de una prensa volumétrica horizontal con dos subhélices horizontales en paralelo. Figure 2.- Main section of "Pulp press propellers with double spiral passage" inside a horizontal volumetric press with two horizontal subhelics in parallel.
Figura 3.- Detalle de filo rascador-limpiador de "Hélices de prensa pulpa con doble paso de espiras" en el recorrido de la espira por el interior de la camisa filtrante. En las citadas figuras se pueden destacar los siguientes elementos constituyentes: Figure 3.- Detail of the scraper-cleaning edge of "Pulp press propellers with double turns" in the course of the turn inside the filter sleeve. In the mentioned figures the following constituent elements can be highlighted:
1 . Espiras de primer paso. one . First step turns.
2. Espiras de segundo paso.  2. Second step turns.
3. Ejes horizontales en paralelo.  3. Horizontal axes in parallel.
4. Camisa filtrante. 4. Filter shirt.
5. Filo de espiras con efecto rascador-limpiador. 6. Pulpa 5. Spiral edge with scraper-cleaner effect. 6. Pulp
7. Área de camisa filtrante de extracción reducida de agua.  7. Filter jacket area with reduced water extraction.
8. Área de camisa filtrante de extracción elevada de agua. EJEMPLO DE REALIZACIÓN PREFERENTE  8. High water extraction filter jacket area. EXAMPLE OF PREFERRED EMBODIMENT
A modo de ejemplo de realización preferente de las "Hélices de prensa pulpa con doble paso de espiras" a la vista de las figuras 1 y 2 se aprecia cómo se ha hecho uso de un sistema de subhélices con doble paso de espiras , para su instalación en una prensa volumétrica horizontal con dos subhélices horizontales en paralelo (3), donde, adicionalmente cada subhélice contiene un segundo paso o filo de espiras (2) idéntico al primer paso o filo de espiras (1 ). Es decir, cada subhélice se conforma según dos pasos de espiras (1 , 2) introducidos en una camisa (4) o envolvente longitudinal, de igual distancia constante en relación al interior de la propia camisa (4) longitudinal, para posicionarse en su barrido por el interior de la camisa (4) filtrante . Dicha distancia mínima está comprendida entre uno y dos milímetros. As an example of a preferred embodiment of the "pulp press propellers with double turns" in view of figures 1 and 2, it can be seen how a sub-helix system with double turns is used, for installation in a horizontal volumetric press with two horizontal parallel sub-propellers (3), where, additionally each sub-propeller contains a second step or spiral edge (2) identical to the first step or spiral edge (1). That is to say, each sub-propeller is shaped according to two turns of turns (1, 2) introduced in a jacket (4) or longitudinal envelope, of equal constant distance in relation to the inside of the longitudinal shirt (4) itself, to position itself in its sweep on the inside of the filter jacket (4). Said minimum distance is between one and two millimeters.
Así mismo, en la figura 3 se aprecia el filo de espira (1 ) con un rascador-limpiador (5) resistente a la abrasión y de configuración idéntica para las espiras de segundo paso (2). Likewise, in figure 3 the spiral edge (1) with an abrasion-resistant scraper-cleaner (5) of identical configuration for the second pass turns (2) can be seen.
En su movimiento natural de avance, los pasos o filos de espiras (1 , 2) desplazan la pulpa (6) con el rascador-limpiador (5), limpiando en consecuencia la capa de pulpa (6) que obstruye la superficie taladrada de la camisa (4) filtrante y haciendo una diferenciación a su paso entre un área previa de la camisa (4) filtrante donde la extracción de agua es reducida (7) a la que le sigue otra posterior donde la extracción de agua es elevada (8). In its natural movement of advance, the steps or edges of turns (1, 2) move the pulp (6) with the scraper-cleaner (5), cleaning accordingly the layer of pulp (6) that obstructs the drilled surface of the filtering jacket (4) and making a differentiation in its passage between a previous area of the filtering jacket (4) where water withdrawal is reduced (7) followed by a subsequent one where water extraction is high (8) .
Para evaluar los resultados se comparan, mediante ensayos certificados en una azucarera, los rendimientos obtenidos en la misma prensa volumétrica horizontal con dos hélices horizontales en paralelo, haciendo uso de dos hélices de un solo paso, en relación con el uso de las hélices objeto de la presente invención, evidenciando un incremento de materia seca comprendido entre un 2% y un 2,5%. To evaluate the results, the yields obtained in the same horizontal volumetric press with two horizontal propellers in parallel are compared by means of certified tests in a sugar bowl, using two single-step propellers, in relation to the use of the propellers subject to the present invention, evidencing an increase of dry matter between 2% and 2.5%.
Para un análisis completo de los resultados obtenidos, es preciso tener en cuenta que una prensa de pulpa trabajando a bajo rendimiento obtiene entre un 20 y 24% de materia seca, mientras que a rendimiento óptimo estaría comprendido entre el 30 y el 34% en materia seca, evidenciando un incremento de la materia seca obtenida de entre un 2% y un 2,5% de materia seca. Esto es un aumento muy relevantes 18% en el rendimiento del prensado, teniendo en cuenta que el rango de rendimiento de la prensa está comprendido entre un 20% y 34%. Luego a modo de conclusión se ha evidenciado un importante aumento en el rendimiento del proceso de prensado y secado mecánico de la pulpa agotada de remolacha, que supone para el industrial un elevado ahorro en la demanda posterior de combustible necesario para llevar a cabo el secado térmico final de la pulpa prensada. En una realización alternativa, también es posible diseñar el doble paso de espiras (2) solamente en un tramo de cada una de las dos subhélices siendo, así mismo, idéntico al primer paso de espiras (1 ) para posicionarse en su barrido por el interior de la camisa (4) filtrante a una distancia mínima de la misma comprendida entre uno y dos milímetros. Así mismo, en otra realización alternativa, se podría hacer uso de la mejora descrita en la presente invención, incorporándolas a prensas volumétricas horizontales con tres o, en general, más de dos subhélices en paralelo. For a complete analysis of the results obtained, it is necessary to take into account that a pulp press working at low yield obtains between 20 and 24% of dry matter, while at optimum performance it would be between 30 and 34% in matter dry, showing an increase in dry matter obtained between 2% and 2.5% of dry material. This is a very relevant 18% increase in the press performance, taking into account that the range of press performance is between 20% and 34%. Then, by way of conclusion, there has been a significant increase in the performance of the mechanical pressing and drying process of depleted beet pulp, which means for the industrialist a high saving in the subsequent demand for fuel necessary to carry out thermal drying Pressed pulp end. In an alternative embodiment, it is also possible to design the double turn of turns (2) only in a section of each of the two sub-propellers being, likewise, identical to the first turn of turns (1) to position themselves in its internal sweep of the filter jacket (4) at a minimum distance thereof between one and two millimeters. Likewise, in another alternative embodiment, use could be made of the improvement described in the present invention, incorporating them into horizontal volumetric presses with three or, in general, more than two subhelices in parallel.
No se considera necesario hacer más extensa esta descripción para que cualquier experto en la materia comprenda el alcance de la invención y las ventajas que de la misma se derivan. Los elementos que lo componen, sus dimensiones, formas o técnicas de implementación, serán susceptibles de variación siempre y cuando ello no suponga una alteración en la esencialidad del invento. It is not considered necessary to make this description more extensive so that any person skilled in the art understands the scope of the invention and the advantages derived therefrom. The elements that compose it, its dimensions, forms or techniques of implementation, will be susceptible of variation as long as this does not imply an alteration in the essentiality of the invention.

Claims

REIVINDICACIONES
1 . - Hélices de prensa pulpa con doble paso de espiras, que están concebidas para su instalación en prensas volumétricas horizontales, comprendiendo dos subhélices horizontales en paralelo, caracterizada porque cada subhélice se conforma teniendo en cuenta las siguientes especificaciones: one . - Pulp press propellers with double spiral passages, which are designed for installation in horizontal volumetric presses, comprising two horizontal subhelices in parallel, characterized in that each sub-helix is shaped taking into account the following specifications:
Cada subhélice dispone de un segundo paso o filo de espiras completo e idéntico a un primer paso o filo de espiras en la misma subhélice, estando ambas subhélices introducidas en una camisa o envolvente longitudinal y situadas de forma que no exista colisión en el recorrido libre de las espiras en la zona en la que más se aproximan las dos subhélices, por tanto cada subhélice se conforma según dos pasos o filos de espiras que presentan la misma distancia a la camisa filtrante, siendo esta distancia constante y quedando, una vez montada en la correspondiente prensa volumétrica, la distancia comprendida entre uno y dos milímetros hasta la camisa filtrante o envolvente que contiene la pulpa.  Each sub-propeller has a second step or complete edge of turns and identical to a first step or edge of turns in the same sub-propeller, both sub-propellers being inserted in a longitudinal jacket or envelope and positioned so that there is no collision in the free path of the turns in the zone in which the two sub-propellers are closest, therefore each sub-propeller is formed according to two steps or turns of turns that have the same distance to the filter jacket, this distance being constant and remaining, once mounted on the corresponding volumetric press, the distance between one and two millimeters to the filter or envelope jacket that contains the pulp.
2. - Hélices de prensa pulpa con doble paso de espiras concebidas para su instalación en prensas volumétricas horizontales según la reivindicación 1 , caracterizada por el hecho de que el filo de espiras tanto de primer paso como de segundo, presenta una prolongación de la espira o rascador-limpiador a modo de recargue duro aportado por soldadura, y con efecto de cuchilla a su paso por el interior de la camisa filtrante, y con capacidad de efecto de rascado o limpiado que conforma el borde de ataque de todas las espiras de cada una de las dos subhélices, en base a su terminación conformando un ángulo obtuso con la propia camisa filtrante en la cara que lleva a cabo la compresión sobre la pulpa, manteniendo la distancia a la camisa filtrante constante en todo su perímetro exterior entre uno a dos milímetros. 2. - Pulp press propellers with double turns of turns designed for installation in horizontal volumetric presses according to claim 1, characterized in that the spiral edge of both first and second turns, has an extension of the spiral or scraper-cleaner as a hard recharge provided by welding, and with a knife effect as it passes through the inside of the filter jacket, and with a scratching or cleaning effect that forms the leading edge of all turns of each of the two sub-propellers, based on their termination forming an obtuse angle with the filter sleeve itself on the face that performs the compression on the pulp, keeping the distance to the filter sleeve constant throughout its outer perimeter between one to two millimeters .
PCT/ES2016/070168 2015-07-20 2016-03-15 Pulp press screws with double pitch of threads WO2017013282A1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020104767A1 (en) * 2018-11-19 2020-05-28 De Smet Rosedowns Limited Improved press

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3461793A (en) * 1967-06-26 1969-08-19 Stord Bartz Industri As Screw presses
EP0773100A1 (en) * 1995-11-10 1997-05-14 F.lli Babbini di Lionello Babbini & C. S.a.s. Screw press for dehydrating fibrous materials
US20020096062A1 (en) * 2001-01-23 2002-07-25 Johnston Robert Boyd Twin screw press with interrupted flights
AU2013219145A1 (en) * 1997-02-10 2013-09-05 The Track Shop Pty Ltd Abrasion resistant surface coatings and method of forming same

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE649638C (en) * 1935-03-05 1937-08-30 Kampens Mek Verksted As Screw press with two or more interlocking press screws
DE2055547A1 (en) * 1970-11-12 1972-05-18 Maschinenfabrik Selwig & Lange, 3300 Braunschweig Screw press with one or more horizontally arranged axially parallel screws
FR2699089B1 (en) * 1992-12-14 1995-06-16 Flurial Sa SELF-CLEANING FILTER DEVICE FOR FLUIDS CONTAINING SOLID PARTICLES.
FR2723598B1 (en) * 1994-08-10 1996-10-18 Sorgho Agro Ind Et Papetier Sa PROCESS FOR DEMOELLING MARINE PLANTS, ESPECIALLY SORGHO, IN ORDER TO OBTAIN PAPER QUALITY FIBERS
AT409108B (en) * 1996-04-25 2002-05-27 Andritz Ag Maschf SCREW PRESS FOR SEPARATING LIQUIDS FROM SOLIDS-LIQUID MIXTURES, ESPECIALLY FIBROUS SUSPENSIONS
ITRE20030079A1 (en) * 2003-09-12 2005-03-13 Internat Presses Manufactoring Ipm S R L SCREW PRESS FOR FIBERGLASS MATERIAL PRESSING,
CN2897633Y (en) * 2006-02-20 2007-05-09 顾强华 Oil press
KR101312119B1 (en) * 2013-07-18 2013-09-26 유재원 The screw press dewatering device using shearing Blade

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3461793A (en) * 1967-06-26 1969-08-19 Stord Bartz Industri As Screw presses
EP0773100A1 (en) * 1995-11-10 1997-05-14 F.lli Babbini di Lionello Babbini & C. S.a.s. Screw press for dehydrating fibrous materials
AU2013219145A1 (en) * 1997-02-10 2013-09-05 The Track Shop Pty Ltd Abrasion resistant surface coatings and method of forming same
US20020096062A1 (en) * 2001-01-23 2002-07-25 Johnston Robert Boyd Twin screw press with interrupted flights

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020104767A1 (en) * 2018-11-19 2020-05-28 De Smet Rosedowns Limited Improved press

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HRP20201058T1 (en) 2020-10-30
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EA201790607A1 (en) 2018-06-29
EP3120995B1 (en) 2020-04-22
MA39593B1 (en) 2020-05-29
PL3120995T3 (en) 2020-11-02
ES2788722T3 (en) 2020-10-22
EA035769B1 (en) 2020-08-07
ES2551254A1 (en) 2015-11-17

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