WO2017156645A1 - System for testing consistency transmitters - Google Patents
System for testing consistency transmitters Download PDFInfo
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- WO2017156645A1 WO2017156645A1 PCT/CL2017/050015 CL2017050015W WO2017156645A1 WO 2017156645 A1 WO2017156645 A1 WO 2017156645A1 CL 2017050015 W CL2017050015 W CL 2017050015W WO 2017156645 A1 WO2017156645 A1 WO 2017156645A1
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- pulp
- consistency
- flow
- transmitter device
- transmitters
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F1/00—Wet end of machines for making continuous webs of paper
- D21F1/08—Regulating consistency
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G9/00—Other accessories for paper-making machines
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/34—Paper
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
Definitions
- the present invention relates to a system and method for testing consistency transmitters in cellulose and paper processes.
- the potential field of application of the present invention is:
- the tests carried out by the laboratories to determine the value of the consistency of the cellulose pulp are determined by standardized procedures, which are performed by the personnel of laboratory. As this test is carried out through empirical processes, it is subject to many actions and conditions that alter the normal parameters of the sample (volume, type of fiber, etc.), which generates an error associated with each step of the procedure, which varies depending on the operator performing the test. This error generated in the consistency determination procedure is transferred to the consistency transmitters when calibrating them.
- US 6779377 B2 1 describes a method for calibrating consistency sensors comprising the steps of: providing a plurality of consistency sensors; automatically calibrate said plurality of stock consistency sensors online; obtain stock consistency readings; and determining the actual values of consistency from said stock consistency readings, at least a mass balance and characteristic curves of said plurality of consistency sensors.
- the problem with this solution is that it requires many consistency transmitters that must be placed in series, resulting in an open process where process properties cannot be controlled.
- the fragility in the process of determining consistency and the errors associated with the procedure not only affect the frequency with which laboratories They must calibrate the equipment or the range of consistency considered acceptable, but it also directly affects the process and production costs of cellulose, since the production calculation is based on two measurements, volumetric flow and consistency. Additionally, all the chemical dosages necessary to infer certain characteristics in the pulp (bleaches, wet strength, etc.) are based on Production (Kg / ton). The problem arises from the need to have a more precise method to calibrate the consistency transmitters to have reliable instruments while maintaining their accuracy and precision.
- a consistency transmitter test system was created. This system aims to detect and indicate the error associated with the measurements of the consistency transmitters and provide the necessary information to calibrate them, perform maintenance and indicate the end of their useful life.
- the consistency transmitters to be analyzed are connected in series with a highly calibrated standard device analyzing both the same pulp, in order to compare the results of the measurements delivered by the consistency transmitters with that of the standard device. By analyzing the information obtained from the comparison between the consistency transmitters and the standard device, it can be determined whether the consistency transmitter should be calibrated, requires replacement of parts or has reached the end of its useful life. At the same time that the state of the consistency transmitters is analyzed, the pulp sample used can be analyzed by the laboratories and thus be able to compare the measurements and Detect the error with which the laboratories are working.
- the operating frequency of the standard device is much less than the consistency transmitters installed in the process, thus reducing the probability of decalibrating it.
- Figure 1 represents a schematic diagram of the system and method according to a preferred embodiment of the invention.
- the present invention relates to a system and method for verifying the operation of a transmission device or pulp consistency transmitters in cellulose and paper processes.
- Figure 1 represents the system (100) for testing pulp consistency transmitters, according to an embodiment of the invention.
- the flow of cellulose pulp circulates through all the elements that make up the system (100) in a closed circuit where operating conditions similar to the processes in a production plant are given: pressure, flow, temperature. These variables are controlled as follows:
- the pressure is controlled by the opening of at least one variable valve (1).
- the process is implemented by at least one PLC (not shown), which receives the censor from at least one pressure transmitter device (2) that closes the feedback loop.
- the flow rate is controlled by the variation in the operating speed of at least one drive device (3).
- the drive device (3) corresponds to a centrifugal pump.
- the process implemented in the at least one PLC receives the feedback sent by at least one flow transmitting device (4) and thus regulates the voltage output of at least one frequency inverter (not shown in the figure). to keep the selection point (set point) of the drive device (3) entered manually,
- the temperature of the pulp is controlled by the ignition of at least one heater (5), preferably arranged inside a main tank (6) where the pulp is passed through the process diagram programmed in the PLC Said tank comprises at least one temperature transmitter device (7).
- the feedback is sent by the temperature transmitter (7) to the PLC.
- the aforementioned variables are controlled to generate operating conditions similar to those found in a cellulose pulp production process.
- the pulp consistency measurements made by at least two transmitting devices (8a, 8b) are compared; one as a standard device (8a) and another as a test device (8b), the latter arranged in a test chamber (9).
- Consistency values are stored in a database and a comparison is made between them.
- the main tank (6) comprises at least one pulp inlet (6a), through which the pulp that will be circulated through the closed circuit (100) is entered.
- the main tank (6) further comprises at least one high level switch (6b) and one low level switch (6c), to have control over the level of the pulp inside said main pond (1)
- the delivery device (3) takes the pulp from the discharge of the main tank (6) and sends it to the test chamber (9), by passing it through the at least one pressure transmitter device (2) the at least one device Pattern (8b) and the at least one flow transmitter device (4). After the test chamber
- the pulp flow passes through the at least variable valve (1) until it is directed to the main tank (6), thus constituting the closed system.
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
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Abstract
The invention relates to a system for checking the functioning of a transmission device or transmitters of the consistency of the pulp in cellulose and paper processes. The system according to the invention is a closed system comprising at least the pulp consistency measurements carried out by at least two transmitter devices, wherein a transmitter device functions as a pattern device and another functions as a test device, with the latter being disposed in a test chamber, wherein the consistency values are stored in a database and a comparison between them is carried out. The invention also relates to an associated method.
Description
SISTEMA PARA PRUEBA DE TRANSMISORES DE CONSISTENCIA SYSTEM FOR CONSISTENCY TRANSMITTER TESTING
CAMPO DE APLICACIÓN SCOPE
La presente invención se relaciona con un sistema y método para pruebas de transmisores de consistencia en procesos de celulosa y papel. The present invention relates to a system and method for testing consistency transmitters in cellulose and paper processes.
ANTECEDENTES BACKGROUND
En la actualidad, la industria de celulosa y papel utiliza una gran cantidad de sensores con los cuales se miden, cuantifican y controlan procesos de producción desde sus inicios hasta obtener el producto final. Algunas variables que permiten conocer el comportamiento del proceso en tiempo real son; temperatura, peso, torque, presión, caudal, velocidad, consistencia, entre otros. Este comportamiento es posible conocerlo gracias a instrumentos industriales quienes deben ser calibrados bajo procedimientos estandarizados o patrones certificados. Una de las variables de proceso más importantes en la industria de la celulosa y el papel es la consistencia. Esta es el porcentaje de fibra que existe en un volumen de pulpa (mezcla de fibra, agua y aditivos). Currently, the pulp and paper industry uses a large number of sensors with which production processes are measured, quantified and controlled from the beginning until the final product is obtained. Some variables that allow to know the behavior of the process in real time are; temperature, weight, torque, pressure, flow, speed, consistency, among others. This behavior is possible to know thanks to industrial instruments who must be calibrated under standardized procedures or certified standards. One of the most important process variables in the pulp and paper industry is consistency. This is the percentage of fiber that exists in a pulp volume (mixture of fiber, water and additives).
En Chile el campo de aplicación es relevante ya que existen varias empresas en la industria de celulosa y papel. Es decir el potencial campo de aplicación de la presente invención es: In Chile the field of application is relevant since there are several companies in the pulp and paper industry. In other words, the potential field of application of the present invention is:
• 5 plantas de celulosa del grupo Arauco. • 5 cellulose plants of the Arauco group.
• 3 plantas del grupo CMPC. • 3 plants of the CMPC group.
• 2 plantas de papel periódico.
• 3 plantas de Tissue. • 2 plants of newspaper. • 3 Tissue plants.
• 4 plantas de papel reciclado. • 4 recycled paper plants.
• 3 de Cartulinas. Adicionalmente, se deben considerar los países con industria en celuosa y papel como Brasil, EE.UU, Finlandia, Suecia y otros. • 3 of Cardboards. Additionally, countries with paper and paper industry such as Brazil, USA, Finland, Sweden and others should be considered.
En estas industrias donde se produce celulosa, o la celulosa es materia prima para otro producto final como el papel o cartulinas, el análisis de la consistencia en sus procesos productivos es efectuado mayoritariamente por transmisores de consistencia instalados en diferentes puntos del proceso, los cuales otorgan un rango de aceptabilidad a los niveles de consistencia pre definidos. La exactitud con la cual operan estos transmisores va a influir en la cantidad de insumos a utilizar y finalmente en la calidad del producto final. Por esto todo el proceso de calibración de los sensores o medidores de consistencia requiere un análisis de laboratorio, si el proceso de análisis tiene algún error este influirá en el resultado final que a su vez será traspasado a la medición. In these industries where cellulose is produced, or cellulose is a raw material for another final product such as paper or cardboard, the analysis of the consistency in its production processes is carried out mostly by consistency transmitters installed at different points of the process, which grant a range of acceptability at pre-defined levels of consistency. The accuracy with which these transmitters operate will influence the quantity of inputs to be used and finally the quality of the final product. This is why the entire process of calibration of the sensors or consistency meters requires a laboratory analysis, if the analysis process has any error this will influence the final result that in turn will be transferred to the measurement.
a) Para calibrar los transmisores de consistencia. a) To calibrate the consistency transmitters.
b) Para monitorear la consistencia en puntos específicos del proceso donde no se dan las condiciones para instalar un transmisor de consistencia. En el caso de ensayos para la calibración, si el laboratorio detecta valores por sobre el rango aceptado, implica que el transmisor de consistencia está "descalibrado" y requiere ser ajustado, reparado o reemplazado. En la medida que se eleve el nivel de confianza en las mediciones efectuadas por los transmisores de consistencia,
menor será la incidencia del laboratorio en el control. b) To monitor the consistency at specific points of the process where the conditions for installing a consistency transmitter are not met. In the case of tests for calibration, if the laboratory detects values above the accepted range, it implies that the consistency transmitter is "uncalibrated" and needs to be adjusted, repaired or replaced. To the extent that the level of confidence in the measurements made by the consistency transmitters is raised, The lower the incidence of the laboratory in the control.
Por otra parte, los ensayos realizados por los laboratorios para determinar el valor de la consistencia de la pulpa de celulosa (ya sea con fines de calibración de transmisores o control directo), están determinados por procedimientos estandarizados, los cuales son ejecutados por el personal de laboratorio. Al ser este ensayo realizado mediante procesos empíricos, está sujeto a muchas acciones y condiciones que alteran los parámetros normales de la muestra (volumen, tipo de fibra, etc.), lo que genera un error asociado a cada paso del procedimiento, el cual varía en función del operador que realiza el ensayo. Este error generado en el procedimiento de determinación de la consistencia, es traspasado a los trasmisores de consistencia al momento de calibrarlos. On the other hand, the tests carried out by the laboratories to determine the value of the consistency of the cellulose pulp (either for the purposes of transmitter calibration or direct control), are determined by standardized procedures, which are performed by the personnel of laboratory. As this test is carried out through empirical processes, it is subject to many actions and conditions that alter the normal parameters of the sample (volume, type of fiber, etc.), which generates an error associated with each step of the procedure, which varies depending on the operator performing the test. This error generated in the consistency determination procedure is transferred to the consistency transmitters when calibrating them.
El documento US 6779377 B2 1 describe un método para calibrar sensores de consistencia que comprende las etapas de: proporcionar una pluralidad de sensores de consistencia; calibrar automáticamente en línea dicha pluralidad de sensores de consistencia de existencias; obtener lecturas de consistencia de existencias; y determinar los valores reales de consistencia a partir de dichas lecturas de consistencia de existencias, al menos un balance de masas y curvas características de dicha pluralidad de sensores de consistencia. El problema de esta solución es que requiere de muchos transmisores de consistencia que deben ser colocados en serie, resultando un proceso abierto donde no se puedan controlar las propiedades del proceso. US 6779377 B2 1 describes a method for calibrating consistency sensors comprising the steps of: providing a plurality of consistency sensors; automatically calibrate said plurality of stock consistency sensors online; obtain stock consistency readings; and determining the actual values of consistency from said stock consistency readings, at least a mass balance and characteristic curves of said plurality of consistency sensors. The problem with this solution is that it requires many consistency transmitters that must be placed in series, resulting in an open process where process properties cannot be controlled.
PROBLEMA TÉCNICO TECHNICAL PROBLEM
La fragilidad en el proceso de determinación de la consistencia y los errores asociados al procedimiento, no solo afectan la frecuencia con la que los laboratorios
deben calibrar los equipos ni el rango de consistencia considerada como aceptable, sino que también afecta directamente el proceso y los costos de producción de celulosa, ya que el cálculo de producción se basa en dos mediciones, el flujo volumétrico y la consistencia. Adicionalmente todas las dosificaciones de químicos necesarios para inferir determinadas características en la pulpa (Blanqueantes, resistencia en húmedo, etc.) son con base en la Producción (Kg/ton). La problemática nace de la necesidad de tener un método más preciso para calibrar los transmisores de consistencia para contar con instrumentos que sean confiables manteniendo su exactitud y precisión. The fragility in the process of determining consistency and the errors associated with the procedure, not only affect the frequency with which laboratories They must calibrate the equipment or the range of consistency considered acceptable, but it also directly affects the process and production costs of cellulose, since the production calculation is based on two measurements, volumetric flow and consistency. Additionally, all the chemical dosages necessary to infer certain characteristics in the pulp (bleaches, wet strength, etc.) are based on Production (Kg / ton). The problem arises from the need to have a more precise method to calibrate the consistency transmitters to have reliable instruments while maintaining their accuracy and precision.
SOLUCIÓN TÉCNICA TECHNICAL SOLUTION
Para abordar la problemática, se creó un sistema de prueba de transmisores de consistencia. Este sistema tiene como finalidad detectar e indicar el error asociado a las mediciones de los transmisores de consistencia y proporcionar la información necesaria para calibrarlos, realizar mantenciones e indicar el fin de su vida útil. Los transmisores de consistencia a analizar son conectados en serie con un dispositivo patrón altamente calibrado analizando ambos la misma pulpa, para de esta forma comparar los resultados de las mediciones entregadas por los transmisores de consistencia con la del dispositivo patrón. Mediante el análisis de la información obtenida de la comparación entre los transmisores de consistencia y el dispositivo patrón, se puede determinar si el transmisor de consistencia debe ser calibrado, requiere reemplazar piezas o ha llegado al fin de su vida útil. Al mismo tiempo que se analiza el estado de los trasmisores de consistencia, la muestra de pulpa utilizada puede ser analizada por los laboratorios y así poder comparar las mediciones y
detectar el error con el cual los laboratorios están trabajando. To address the problem, a consistency transmitter test system was created. This system aims to detect and indicate the error associated with the measurements of the consistency transmitters and provide the necessary information to calibrate them, perform maintenance and indicate the end of their useful life. The consistency transmitters to be analyzed are connected in series with a highly calibrated standard device analyzing both the same pulp, in order to compare the results of the measurements delivered by the consistency transmitters with that of the standard device. By analyzing the information obtained from the comparison between the consistency transmitters and the standard device, it can be determined whether the consistency transmitter should be calibrated, requires replacement of parts or has reached the end of its useful life. At the same time that the state of the consistency transmitters is analyzed, the pulp sample used can be analyzed by the laboratories and thus be able to compare the measurements and Detect the error with which the laboratories are working.
La robustez de este sistema y la confianza en los resultados depende de la calibración y exactitud de las mediciones del transmisor de consistencia a utilizar como dispositivo patrón, es por esto que estas condiciones se deben asegurar mediante procesos y regulaciones de funcionamiento. Los parámetros que aseguran la calibración y exactitud de las mediciones del dispositivo patrón son las siguientes: The robustness of this system and the confidence in the results depend on the calibration and accuracy of the measurements of the consistency transmitter to be used as a standard device, which is why these conditions must be ensured by operating processes and regulations. The parameters that ensure the calibration and accuracy of the measurements of the standard device are the following:
a) El principio de funcionamiento del dispositivo patrón es óptico, de esta forma se eliminan considerablemente las causas de falla que se presentan en los equipos rotativos (los equipos rotatorios son los transmisores de consistencia de mayor presencia en la industria). a) The principle of operation of the standard device is optical, in this way the causes of failure that occur in rotating equipment are eliminated considerably (rotary equipment is the consistency transmitters with the greatest presence in the industry).
b) El sistema de prueba de pulpa genera condiciones de proceso controladas y menos hostiles que un proceso real, reduciendo el riesgo de descalibrar el equipo. b) The pulp test system generates controlled and less hostile process conditions than a real process, reducing the risk of decalibrating the equipment.
c) La frecuencia de funcionamiento del dispositivo patrón es mucho menos que los transmisores de consistencia instalados en el proceso, reduciendo de esta forma la probabilidad de descalibrarlo. c) The operating frequency of the standard device is much less than the consistency transmitters installed in the process, thus reducing the probability of decalibrating it.
d) La frecuencia y el proceso de la calibración del dispositivo patrón es definido por TAPPI (Technical Association of the Pulp and Paper Industry), entidad internacional de mayor experiencia en procesos de medición de consistencia.
DESCRIPCIÓN DE LAS FIGURAS d) The frequency and calibration process of the standard device is defined by TAPPI (Technical Association of the Pulp and Paper Industry), an international entity with the greatest experience in consistency measurement processes. DESCRIPTION OF THE FIGURES
La Figura 1 representa un diagrama esquemático del sistema y del método de acuerdo a una modalidad preferida de la invención. Figure 1 represents a schematic diagram of the system and method according to a preferred embodiment of the invention.
DESCRIPCIÓN DETALLADA DE LA INVENCIÓN DETAILED DESCRIPTION OF THE INVENTION
La presente invención se relaciona con un sistema y método para verificar el funcionamiento de dispositivo de transmisión o transmisores de consistencia de la pulpa en procesos de celulosa y papel. The present invention relates to a system and method for verifying the operation of a transmission device or pulp consistency transmitters in cellulose and paper processes.
La figura 1 represente el sistema (100) para pruebas de transmisores de consistencia de pulpa, de acuerdo a una modalidad de la invención. El flujo de pulpa celulosa circula a través de todos los elementos que componen el sistema (100) en un circuito cerrado donde se dan condiciones de operación similares a los procesos en una planta de producción: presión, caudal, temperatura. Estas variables son controladas de la siguiente forma: Figure 1 represents the system (100) for testing pulp consistency transmitters, according to an embodiment of the invention. The flow of cellulose pulp circulates through all the elements that make up the system (100) in a closed circuit where operating conditions similar to the processes in a production plant are given: pressure, flow, temperature. These variables are controlled as follows:
a) La presión es controlada por la apertura de al menos válvula variable (1 ). El proceso es implementado mediante al menos un PLC (no mostrado), el cual recibe el censado desde al menos un dispositivo transmisor de presión (2) que cierra el lazo de control retroalimentado. a) The pressure is controlled by the opening of at least one variable valve (1). The process is implemented by at least one PLC (not shown), which receives the censor from at least one pressure transmitter device (2) that closes the feedback loop.
b) El caudal es contralado por la variación de velocidad del funcionamiento de al menos un dispositivo de impulsión (3). En una modalidad preferida, el dispositivo de impulsión (3) corresponde a una bomba centrífuga. El proceso implementado en el al menos un PLC recibe la retroalimentación enviada por al menos un dispositivo transmisor de flujo (4) y de esta forma regula la salida de voltaje de al menos un variador de frecuencia (no mostrado en la figura
para mantener el punto de selección (set point) del dispositivo de impulsión (3) ingresado manualmente, b) The flow rate is controlled by the variation in the operating speed of at least one drive device (3). In a preferred embodiment, the drive device (3) corresponds to a centrifugal pump. The process implemented in the at least one PLC receives the feedback sent by at least one flow transmitting device (4) and thus regulates the voltage output of at least one frequency inverter (not shown in the figure). to keep the selection point (set point) of the drive device (3) entered manually,
c) Así mismo la temperatura de la pulpa es controlada por el encendido de al menos un calefactor (5), dispuestos preferentemente al interior de un estanque principal (6) donde se hace pasar la pulpa, a través del diagrama de procesos programado en el PLC. Dicho estanque comprende al menos un dispositivo transmisor de temperatura (7). Para cerrar el lazo de control de temperatura, la retroalimentación es enviada por el transmisor de temperatura (7) al PLC. c) Likewise, the temperature of the pulp is controlled by the ignition of at least one heater (5), preferably arranged inside a main tank (6) where the pulp is passed through the process diagram programmed in the PLC Said tank comprises at least one temperature transmitter device (7). To close the temperature control loop, the feedback is sent by the temperature transmitter (7) to the PLC.
Mediante el sistema (100) de la presente invención, se controlan las variables antes mencionadas para generar condiciones de operación similares a las que se encuentran en un proceso de producción de pulpa celulosa. Al hacer recircular pulpa celulosa a través del circuito cerrado del sistema (100), mostrado en la Figura 1 se comparan las mediciones de consistencia de pulpa realizadas por al menos dos dispositivos transmisores (8a, 8b); uno como dispositivo patrón (8a) y otro como dispositivo de prueba (8b), este último dispuesto en una cámara de prueba (9). Los valores de consistencia son almacenados en una base de datos y se realiza una comparación entre ellos. By means of the system (100) of the present invention, the aforementioned variables are controlled to generate operating conditions similar to those found in a cellulose pulp production process. By recirculating cellulose pulp through the closed circuit of the system (100), shown in Figure 1, the pulp consistency measurements made by at least two transmitting devices (8a, 8b) are compared; one as a standard device (8a) and another as a test device (8b), the latter arranged in a test chamber (9). Consistency values are stored in a database and a comparison is made between them.
A partir de los resultados de la comparación se concluye si el dispositivo de prueba (8b): From the results of the comparison it is concluded if the test device (8b):
a) necesita mantenimiento, a) needs maintenance,
b) sustitución de algunos de sus elementos, o b) replacement of some of its elements, or
c) fin de su vida útil.
Tal como muestra la Figura 1 , el estanque principal (6) comprende al menos una entrada de pulpa (6a), por donde se ingresa la pulpa que se hará circular por el circuito cerrado (100). El estanque principal (6) comprende además al menos un switch de nivel alto (6b) y un switch de nivel bajo (6c), para tener control sobre el nivel de la pulpa al interior del dicho estanque principal (1 ) c) end of its useful life. As Figure 1 shows, the main tank (6) comprises at least one pulp inlet (6a), through which the pulp that will be circulated through the closed circuit (100) is entered. The main tank (6) further comprises at least one high level switch (6b) and one low level switch (6c), to have control over the level of the pulp inside said main pond (1)
El dispositivo de impulsión (3) toma la pulpa desde la descarga del estanque principal (6) y la envía hacia la cámara de prueba (9), haciéndola pasar por el al menos un dispositivo trasmisor de presión (2) el al menos un dispositivo Patrón (8b) y el al menos un dispositivo transmisor de flujo (4). Posterior a la cámara de pruebaThe delivery device (3) takes the pulp from the discharge of the main tank (6) and sends it to the test chamber (9), by passing it through the at least one pressure transmitter device (2) the at least one device Pattern (8b) and the at least one flow transmitter device (4). After the test chamber
(1 ), el flujo de pulpa pasa por la al menos válvula variable (1 ) hasta dirigirse al estanque principal (6), constituyendo así el sistema cerrado.
(1), the pulp flow passes through the at least variable valve (1) until it is directed to the main tank (6), thus constituting the closed system.
Claims
1 . - Un sistema para verificar el funcionamiento de dispositivo de transmisión o transmisores de consistencia de la pulpa en procesos de celulosa y papel, CARACTERIZADO porque el sistema es cerrado y comprende al menos las mediciones de consistencia de pulpa realizadas por al menos dos dispositivos transmisores, donde un dispositivo transmisor funciona como como dispositivo patrón y otro como dispositivo de prueba, este último dispuesto en una cámara de prueba, donde los valores de consistencia son almacenados en una base de datos y se realiza una comparación entre ellos. one . - A system to verify the operation of a transmission device or pulp consistency transmitters in cellulose and paper processes, CHARACTERIZED because the system is closed and comprises at least the pulp consistency measurements made by at least two transmitting devices, where a transmitter device functions as a standard device and another as a test device, the latter arranged in a test chamber, where the consistency values are stored in a database and a comparison is made between them.
2. - El sistema de acuerdo a la reivindicación 1 , CARACTERIZADO porque comprende al menos válvula variable, para controlar la presión del sistema, y al menos un dispositivo transmisor de presión. 2. - The system according to claim 1, CHARACTERIZED in that it comprises at least a variable valve, to control the system pressure, and at least one pressure transmitting device.
3. - El sistema de acuerdo a la reivindicación 1 , CARACTERIZADO porque comprende al menos un dispositivo de impulsión, para impulsar el flujo en el sistema cerrado, y un dispositivo transmisor de flujo para regulación del caudal. 3. - The system according to claim 1, CHARACTERIZED because it comprises at least one drive device, to drive the flow in the closed system, and a flow transmitter device for flow regulation.
4. - El sistema de acuerdo a la reivindicación 1 , CARACTERIZADO porque comprende al menos un calefactor, dispuesto preferentemente al interior de un estanque principal donde se hace pasar la pulpa. 4. - The system according to claim 1, CHARACTERIZED because it comprises at least one heater, preferably arranged inside a main tank where the pulp is passed.
5. - El sistema de acuerdo a la reivindicación 4, CARACTERIZADO porque dicho estanque comprende al menos un sensor de temperatura. 5. - The system according to claim 4, CHARACTERIZED in that said tank comprises at least one temperature sensor.
6. - El sistema de acuerdo a la reivindicación 5, CARACTERIZADO porque el estanque principal comprende además una entrada de pulpa y al menos un switch de nivel alto y un switch de nivel bajo, para tener control sobre el nivel de la pulpa
al interior del dicho estanque principal (1 ) 6. - The system according to claim 5, CHARACTERIZED in that the main tank further comprises a pulp inlet and at least one high level switch and a low level switch, to have control over the pulp level inside said main pond (1)
7. - Un método para verificar el funcionamiento de dispositivo de transmisión o transmisores de consistencia de la pulpa en procesos de celulosa y papel, CARACTERIZADO porque comprende los pasos de: 7. - A method to verify the operation of a transmission device or pulp consistency transmitters in cellulose and paper processes, CHARACTERIZED because it comprises the steps of:
- hacer recircular pulpa celulosa a través de un sistema cerrado; - recirculating cellulose pulp through a closed system;
- medir la consistencia de la pulpa del sistema cerrado mediante un dispositivo transmisor patrón; - measure the pulp consistency of the closed system by means of a standard transmitter device;
- medir la consistencia de la pulpa del sistema cerrado mediante un dispositivo transmisor patrón; - measure the pulp consistency of the closed system by means of a standard transmitter device;
- medir la consistencia de la pulpa del sistema cerrado mediante un dispositivo de prueba dispuesto en una cámara de prueba; - measure the pulp consistency of the closed system by means of a test device arranged in a test chamber;
- almacenar los valores de consistencia en una base de datos; y - store consistency values in a database; Y
- realizar una comparación entre ambos valores de consistencia. - make a comparison between both consistency values.
8. - El método de acuerdo a la reivindicación 7, CARACTERIZADO porque comprende el paso de controlar la presión del sistema cerrado mediante la apertura de al menos válvula variable, con información recibida de al menos un dispositivo transmisor de presión. 8. - The method according to claim 7, CHARACTERIZED in that it comprises the step of controlling the pressure of the closed system by opening at least one variable valve, with information received from at least one pressure transmitting device.
9. - El método de acuerdo a la reivindicación 7, CARACTERIZADO porque comprende el paso de controlar el caudal mediante la variación de velocidad del funcionamiento de al menos un dispositivo de impulsión, con información recibida de al menos un dispositivo transmisor de flujo. 9. - The method according to claim 7, CHARACTERIZED in that it comprises the step of controlling the flow rate by varying the speed of operation of at least one drive device, with information received from at least one flow transmitter device.
10. - El método de acuerdo a la reivindicación 9, CARACTERIZADO porque el al menos un dispositivo transmisor de flujo regula la salida de voltaje de al menos un variador de frecuencia para mantener el punto de selección (set point) del dispositivo
de impulsión ingresado manualmente. 10. - The method according to claim 9, CHARACTERIZED in that the at least one flow transmitter device regulates the voltage output of at least one frequency inverter to maintain the set point of the device of drive entered manually.
1 1 .- El método de acuerdo a la reivindicación 7, CARACTERIZADO porque comprende el paso de controlar la temperatura de la pulpa mediante el encendido de al menos un calefactor, dispuestos preferentemente al interior de un estanque principal, con información recibida de al menos un dispositivo transmisor de temperatura.
The method according to claim 7, CHARACTERIZED in that it comprises the step of controlling the temperature of the pulp by switching on at least one heater, preferably arranged inside a main tank, with information received from at least one temperature transmitter device.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201662307870P | 2016-03-14 | 2016-03-14 | |
| US62/307,870 | 2016-03-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2017156645A1 true WO2017156645A1 (en) | 2017-09-21 |
Family
ID=59850069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/CL2017/050015 WO2017156645A1 (en) | 2016-03-14 | 2017-03-14 | System for testing consistency transmitters |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2017156645A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115277486A (en) * | 2022-08-01 | 2022-11-01 | 广域铭岛数字科技有限公司 | Industrial Internet-based automatic testing method, device and medium |
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| CN115277486A (en) * | 2022-08-01 | 2022-11-01 | 广域铭岛数字科技有限公司 | Industrial Internet-based automatic testing method, device and medium |
| CN115277486B (en) * | 2022-08-01 | 2024-05-07 | 广域铭岛数字科技有限公司 | Automatic testing method, device and medium based on industrial Internet |
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