Dosificador de sólidos y polvos

Dosificador de sólidos y polvos

una bomba programable, única para sustancias sólidas sólidas en polvo de flujo libre

El LAMBDA DOSER es una bomba programable, única para sustancias sólidas sólidas en polvo de flujo libre. El dosificador permite la adición automática o continua de substancias en polvo, substancias polvorosas y cristalinas, sin necesidad de cucharilla o espátulas.

El dosificador DOSER consiste en una unidad de dosificación acoplada a un motor paso a paso controlado digitalmente por una moderna electrónica. La bomba dosificadora permite una adición constante y reproducible, incluso de sustancias en polvo “difíciles” de manipular.

El dosificador de sólidos DOSER ofrece diferentes posibilidades de control remoto o a distancia y puede ser utilizado para el control automático de una gran variedad de procesos.

El LAMBDA DOSER modernizará su laboratorio. 

Galería de imágenes del dispensador de polvo: 

Los instrumentos de dosificación de polvo como DOSER 0.2 L, DOSER 1 L, DOSER 3 L, HI-DOSER 1 L, HI-DOSER 3 L y sus accesorios y consumibles se pueden ver en https://www.lambda-instruments.com/es/dosificador-de-solidos/doser-hidoser-galeria/   

Características del dosificador de sólidos LAMBDA DOSER

Caudal

El control digital de la velocidad de dosificación de 0 a 999 permite la dosificación de sólidos de forma precisa y reproducible (por ejemplo: 50 mg/min hasta 50 g/min para el NaCl).

Programable

Se pueden programar fácilmente hasta 27 pares de velocidades y tiempos de dosificación.

Capacidad

El recipiente de vidrio tiene una capacidad de aproximadamente 200 mL (equivale a 250 g de NaCl, 200 g de NaHCO3, 150 g de sacarosa). Esta capacidad es ideal para la mayoría de las aplicaciones en el laboratorio. También suministramos un recipiente de 1 L aproximadamente.

Seguridad

Gracias al DOSER, la adición de sustancias químicas pulverulentas ha pasado a ser reproducible, segura y conforme a las normas de seguridad y estándares de calidad para la manipulación de productos químicos en el trabajo de investigación en el laboratorio (GLP). Su construcción hermética permite la manipulación segura de sustancias sólidas peligrosas o tóxicas.

Fácil montaje y limpieza

El dosificador de sustancias en polvo LAMBDA DOSER ha sido construido persiguiendo su fácil ensamblaje y limpieza. Puede ser conectado a cualquier recipiente de vidrio provisto de una conexión con esmerilado normalizado NS 29/32 o conexión con rosca SVL. Todas las partes que entrarán en contacto con las sustancias en polvo están hechas de materiales químico-resistentes.

Pequeñas dimensiones y robusta construcción

Se ha puesto especial atención en la creación de una bomba de pequeñas dimensiones, en consecuencia, el dosificador LAMBDA DOSER. El DOSER puede ser fácilmente adaptado a instalaciones de laboratorio complejas. Su robusta construcción y la alta calidad de sus materiales aseguran la larga vida útil de la bomba para sustancias en polvo LAMBDA DOSER.

Atmósferas controladas

Varios cierres herméticos permiten que el DOSER pueda ser utilizado bajo una leve sobrepresión o vacío. Así, si un proceso lo requiere, el DOSER puede ser lavado con un gas inerte durante la dosificación.

Económico

El usuario podrá ocuparse en otras labores, ya que el DOSER, por su sistema de adición automática de sustancias sólidas, permite la disminución en el número de experimentos, asegura la reproducibilidad del caudal y evita la repetición de experimentos a causa de errores de manipulación. Además, el dosificador de sustancias sólidas en polvo DOSER ofrece una excelente relación calidad-precio.

Control a distancia / control remoto

La velocidad de adición puede ser controlada a distancia en un intervalo completo mediante la aplicación de una tensión o voltaje de 0-10 V. La señal de encendido y apagado (ON/OFF) se efectúa por un simple contacto externo o por una señal de 12V. La interfaz RS-485 o RS-232 (opcional) permite el control avanzado por computador (caudales variables, gradientes de dosificación, etc.). Un programa de control PNet (opcional) también está disponible.

Cuantificación de las sustancias dosificadas

El DOSER puede ser configurado con el integrador electrónico LAMBDA INTEGRATOR (opcional) que permite determinar la cantidad de sustancia agregada en función del tiempo. Estos datos brindan información muy importante sobre el proceso y las reacciones, por ejemplo, cuando el dosificador es controlado, por un pH-stat (o pHmetro), termóstato, etc.

Tipo: LAMBDA DOSER / HI-DOSER – Dosificador de sólidos o polvo programable controlado por microprocesador
Programación: DOSER: Hasta 27 pasos de velocidad de flujo o caudal y tiempo; HI-DOSER: Hasta 99 pasos de velocidad de flujo o caudal y tiempo
Tiempo de resolución: 0 hasta 999 minutos en pasos de 1 minuto o de 0 hasta 99.9 minutos en pasos de 0.1 minuto: el tiempo de resolución puede ser seleccionado individualmente para cada paso de programa
Motor: DOSER: Motor a pasos controlado por microprocesador; HI-DOSER: Motor de imanes permanentes sincrónicos BLDC (magnetos de neodiminio) controlado por microprocesador
Intervalo de control de velocidad: 0 hasta 999
Interfaz: RS-485 o RS-232
Fuente de energía: DOSER: 95–240 V/60–50 Hz CA conector a fuente de energía con salida a CD 12V/12W; HI-DOSER: 95–240 V/60–50 Hz CA conector a fuente de energía con salida a CD 12V/50W; Posibilidad de operación en campo con el uso de una batería de 12 V
Volumen: Aprox. Vasos de vidrio de 0.2 l, 1 l y 3 l
Dimensiones: DOSER Unidad del Motor: 6 (H) x 7 (A) x 13 (P) cm; HI-DOSER: Unidad del Motor: 10.5 (A) x 9.5 (H) x 13 (P) cm; Vaso de vidrio 0.2 l: 30 (H) x12 (A) x 5 (P) cm; Vaso de vidrio 1 l: 30 (H) x 18 (A) x 14 (P) cm; Vaso de vidrio 3 l: 38 (H) x 21 (A) x 17.5 (P) cm;
Seguridad: Conforme a la CE, conforme con la norma IEC 1010/1 para instrumentos de laboratorio
Temperatura de operación: 0 - 40 °C
Humedad de operación: 0-90% HR, sin condensado
Control remoto: 0-10 V (Control de velocidad de dosificado); 3-12 V CD (control ON/OFF); opción 0-20 o 4-20 mA; con interruptor de pie
Software: Programa de control por computador PNet (opcional)

Coal particles were introduced into the reactor through a N2-purged microprocessor-controlled programmable powder pump feeder (HI-DOSER, LAMBDA) positioned above the reactor tube...The advantage of this powder pump feeder is that the feeding amount is relatively uniform, avoiding the clogging of the feeder and instability of the gas production.

Tianle Dai, Cheng Xu, Qingmin Zhang, Xin Liu, Zheshao Chang, Yongping Yang. Experimental study of the solar-driven steam gasification of coal in an improved updraft combined drop-tube and fixed-bed reactor. Energy Conversion and Management, Volume 259, 2022, 115571, ISSN 0196-8904.


DOI: https://doi.org/10.1016/j.enconman.2022.115571 


The acid−base neutralization of CA and NaOH was performed in RC1e with the Lambda doser powder dosing instrument.

Zheng Ran, Lei Ni, Yong Pan, Yutong Chen, Jun Wang, Juncheng Jiang, and Chi-Min Shu. Safety Criteria for Solid–Liquid Heterogeneous Systems in Semibatch Reactors. ACS Omega 2022 7 (24), 21207-21219 

DOI: https://doi.org/10.1021/acsomega.2c02139  


Catalytic pyrolysis experimental setup: A programmable feeder (LAMBDA DOSER 1L) dispensed plastic pellets, typically at a feeding rate of 120 g/h, into aquartz reactor, which contained 1 kg of 8 mm silicon carbide balls. The ball bed was heated and maintained at 500 ◦C for all tests in this study bya programmable microwave heating system.

Nan Zhou, Leilei Dai, Yuancai Lyu, Yunpu Wang, Hui Li, Kirk Cobb, Paul Chen, Hanwu Lei, Roger Ruan. A structured catalyst of ZSM-5/SiC foam for chemical recycling of waste plastics via catalytic pyrolysis. Chemical Engineering Journal, Volume 440, 2022, 135836, ISSN 1385-8947. 

DOI: https://doi.org/10.1016/j.cej.2022.135836


Copper chloride fed into the quartz reactor by LAMBDA Powder Feeder for producing carbon-coated copper nanoparticles by vapor-phase reduction


Eiroma, K.; Forsman, J.; Hult, E.-L.; Auvinen, A.; Sipiläinen-Malm, T.; Alastalo, A.; Tapper, U.; Leppäniemi, J.; Mattila, P.; Lyyränen, J.; Sarlin, J.; Jokiniemi, J.; Mössmer, S.. Water-Based Carbon-Coated Copper Nanoparticle Fluid—Formation of Conductive Layers at Low Temperature by Spin Coating and Inkjet Deposition. Journal of Imaging Science and Technology, Volume 56, Number 4, July 2012 , pp. 40501-1-40501-10(10)
Keywords: Sedimentation, deposition, copper chloride, nanoparticles, Ethylene glycol, carbon, vapour phase reduction, porous alumina, CNT


Continuous feeding of Copper chloride powder on alumina (Al2O3) pellet bed within a quartz glass nanoparticle reactor to develop Carbon coated copper nanoparticle Inkjet Fluid

Eiroma, Kim; Auvinen, Ari; Forsman, Johanna; Hult, Eva-Lena; Jokiniemi, Jorma; Koskela, Pirjo; Sarlin, Juha; Sipiläinen-Malm, Thea; Tapper, Unto. Development of Conductive Carbon Coated Copper Nanoparticle Inkjet Fluid. NIP & Digital Fabrication Conference, 2011 International Conference on Digital Printing Technologies. Pages 418-826. , pp. 458-461(4)
Keywords: continuous, flow reactor, copper chloride, nanoparticles, gas phase, aluminium oxide, carbon nanotubes, CNT, inkjet, spin coating


Timed particle additions using LAMBDA Powder DOSER to study the fabrication and evaluation of the ferroelectric reinforced metal matrix composites (FR-MMCs)

Poquette, Ben David. Understanding Ferroelastic Domain Reorientation as a Damping Mechanism in Ferroelectric Reinforced Metal Matrix Composites
Virginia Polytechnic Institute and State University in Blacksburg, Virginia
Keywords: Metal Matrix Composites, Damping, Ferroelectric, Ferroelastic, Twinning, Domain Reorientation, Electroless Plating, Electrodeposition, Electroforming, Dispersion Strengthening


 LAMBDA Powder DOSER used as a particle feeder for Drop Tube Reactor (DTR)

Hampp F., Janajreh I., Development of a Drop Tube Reactor to Test and Assist a Sustainable Manufacturing Process. Advances in Sustainable Manufacturing, pp 141-148. 2011.
Department of Mechanical Engineering, Masdar Institute of Science and Technology, Abu Dhabi, UAE
Keywords: Gasification, Drop Tube Reactor, Sustainable Product, Development, Small Scale Experiments, Simulation Assisted Design


Pre-treated (over dried at 60%, moisture content 2.38%) lignocellulosic biomass feeding operation for fed-batch enzymatic hydrolysis was controlled by programmed LAMBDA powder DOSER

Chao Tai, Deepak R. Keshwani, Diego S. Voltan, Pankaj S. Kuhar, Aaron J. Engel. Optimal control strategy for fed-batch enzymatic hydrolysis of lignocellulosic biomass based on epidemic modelling, Biotechnol Bioeng. 2015 Feb 5. doi: 10.1002/bit.25552
University of Nebraska-Lincoln, USA; São Paulo State University, Brazil and CAPES Foundation, Brazil.
Keywords: Biofuels; Enzymatic hydrolysis; Epidemic model; Fed-batch; Optimal control


Established amounts of spherical and transparent glass particles simulating fuel droplets were introduced into the channel using Lambda powder dosing device

V. Bodoc, D. Voicu. Experimental investigation of the infrared extinction limitations for vapor concentration measurement in a gas/particle flow. 17th International Symposium on Applications of Laser Techniques to Fluid Mechanics, Jul 2014, LISBONNE, Portugal.
ONERA - The French Aerospace Lab, France.
Keywords: Light Scattering; Vapor Molar Concentration; Infrared Absorption; Laser Beam


Dried and sieved bagasse particles were fed by the calibrated feeder (LAMBDA DOSER) into the drop-tube trickle-bed reactor

Krüsi, Michael. Heat transfer enhancement in a solar biomass gasifier. PhD diss., Diss., Eidgenössische Technische Hochschule ETH Zürich, Nr. 21821, 2014.
ETH-Zürich, Switzerland.
Keywords: Alternative Energies; Biomass; Fuel Technology; Synthesis Gas


Feeding operation of fed-batch enzymatic hydrolysis conducted by DOSER which received timely commands from LabVIEW (fuzzy logic control system)

Tai, Chao, Diego S. Voltan, Deepak R. Keshwani, George E. Meyer, and Pankaj S. Kuhar. "Fuzzy logic feedback control for fed-batch enzymatic hydrolysis of lignocellulosic biomass." Bioprocess and biosystems engineering (2016): 1-8.
University of Nebraska-Lincoln, USA and São Paulo State University, Brazil
Keywords: Fuzzy Logic Control; Cellulose Conversion Rate; Acid-pretreated Corn Stover; Pretreated Corn Stover; Batch Enzymatic Hydrolysis; Enzyme Feeding; Pretreated Biomass; High Solid Loading; Corn Stover Sample; Glucose Concentration; Glucose Release Rate


 The reactor is fitted with the LAMBDA POWDER DOSER to supply solid NaBH4 continuously

Muir, Sean S. (2013). Sodium borohydride production and utilisation for improved hydrogen storage. PhD Thesis https://doi.org/10.14264/uql.2016.54
Australian Institute for Bioengineering and Nanotechnology, The University of Queensland


Spectral Characterization of Copper and Iron Sulfide Combustion with experimental setup: A) gas & solid feeding LAMBDA DOSER systems; B) reaction zone and electrical furnace; C) optical sensing system

Diaz, W., Toro, C., Balladares, E., Parra, V., Coelho, P., Reyes, G. & Parra, R. (2019). Spectral Characterization of Copper and Iron Sulfide Combustion: A Multivariate Data Analysis Approach for Mineral Identification on the Blend. 
Metals 2019, 9(9), 1017; https://doi.org/10.3390/met9091017.
Keywords: copper concentrate; pyrometallurgy; flash smelting; combustion; classification; spectroscopy; PCA; SIMCA; PLS-DA; k-NN; support vector machines; rotary feeder; solid feeder


The feeder (LAMBDA DOSER) was placed on the top of the DTF to continuously and uniformly feed the pulverized coal with a flow rate of 0.6 to 0.7 g/min. Aims to investigate the hydropyrolysis behavior of pulverized bituminous coal in a drop-tube furnace (DTF) with a temperature of 800–1000 °C.

Rui Gao; Benhao Dou; Qinghua Chang; Jianliang Xu; Zhenghua Dai; Guangsuo Yu; Fuchen Wang. (2020). Effect of temperature and hydrogen on product distribution and evolution of char structure during pyrolysis of bituminous coal in a drop tube furnace.
Fuel, ISSN: 0016-2361, Vol: 267, Page: 117078; http://doi.org/10.1016/j.fuel.2020.117078
Keywords: Hydropyrolysis; DTFT; Tar composition; Char structure evolution. 


The  solid powder feeding system (LAMBDA HI-DOSER 1L)  was used to feed the premixed iron ore and lime continuously into the plasma arc zone during the arc operation. The powder dispenser consists of a dosing unit and a powder distributor coupled to a stepping motor to control the number of turns per minute and accordingly the dispensing rate.

Naseri Seftejani, M.; Schenk, J.; Spreitzer, D.; Andreas Zarl, M. (2020). Slag Formation During Reduction of Iron Oxide Using Hydrogen Plasma Smelting Reduction.
Materials 2020, 13, 935; http://doi.org/10.20944/preprints202001.0337.v1 
Keywords: slag; basicity; hydrogen plasma; smelting reduction; iron oxide; plasma arc; hydrogen utilisation; degree of reduction; hematite

What is the lead time of Powder Doser?

We have DOSERs in stock and it can be delivered to you within a few days from order. Practically, it is only the time taken for shipping


Do you accept Credit Card payments?

You can pay using your credit card via PayPal. Most importantly, it is not necessary to have a PayPal account to make the payment via credit card.


Could you please confirm the particle size that can be fed by the dosing system?

The biggest particle size for powders that could be dosed with our DOSER is about 4 mm. A good dosing of powders depends essentially on the flowing properties of the respective powders to be dosed. In general, homogeneous and free-flowing powders can be dosed best.


How does the LAMBDA DOSER work with the substances which are prone to agglomeration?

The powder / granules / solid must be properly treated for good flowing properties It is also possible to allow a gas flow to pass through the Lambda dosing vessel in order to create a controlled atmosphere.
It is often possible to substantially improve the flowing properties of the respective powder / granules / solid by adding Aerosil (fumed silica – pure SiO2) to your powder (~0.1 - 2% by weight).


How the LAMBDA DOSER reacts to abrasive powders?

In the case of abrasive materials being used with the LAMBDA Powder DOSER, you will have an opportunity to replace the glass vessel and / or the distributors as needed.


What is the accuracy of the each dispensing?

The motor of the driving unit is controlled with quartz-driven electronics, similarly as it is done in electronic watches.Therefore, the accuracy depends mainly on the powder. For best accuracy and precise doses, the powder needs to be free-flowing and homogeneous.


Can the DOSER control the mass flow rate (g/min) of the powder being dispensed?

It is always possible to control the mass flow rate of the powder using the LAMBDA Doser. You could program the DOSER up to 27 pairs of speed and time settings to control your desired mass flow rate (g/min).


Is it possible to control the DOSER via Mettler Toledo titroprocessor to dispense NaF to the titration process when required?

Yes, the powder DOSER can be controlled by Mettler Titration Excellence T50/T70/T90 via RS-232 communication (most common type of connection with Mettler accessories), to dispense the desired amount of powder to the titration process.
The powder DOSER has to be included as RS-232 control in the titroprocessor unit and the desired activity can be selected (e.g.: the signal would switch off the DOSER or switch it on, etc.)
For integration of DOSER with your Mettler titroprocessor, you would need the RS-232 interface activated in the powder dosing unit and RS-232 connection cable.