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DODA BG80 Series Use And Maintenance Manual
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DODA BG80 Series Use And Maintenance Manual

Mixer for biogas fermenters
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COSTRUZIONE MACCHINE AGRICOLE
di
DODA ALDO & C SNC
USE AND MAINTENANCE MANUAL
MIXER FOR
BIOGAS
FERMENTERS
SERIES BG80
COSTRUZIONE MACCHINE AGRICOLE di DODA ALDO & C SNC
Via Sante Salmaso 18/20 46010 BUSCOLDO (MN) ITALY
Tel. +39 0376/410043 - Fax. +39 0376/410032
http://www.doda.com Email: doda@doda.com
1

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Summary of Contents for DODA BG80 Series

  • Page 1 DODA ALDO & C SNC USE AND MAINTENANCE MANUAL MIXER FOR BIOGAS FERMENTERS SERIES BG80 COSTRUZIONE MACCHINE AGRICOLE di DODA ALDO & C SNC Via Sante Salmaso 18/20 46010 BUSCOLDO (MN) ITALY Tel. +39 0376/410043 - Fax. +39 0376/410032 http://www.doda.com Email: doda@doda.com...
  • Page 2 INDEX EC Declaration of conformity Safety instructions Allowed employment Safety rules Symbols present in the manual Stickers Description Functioning Technical features Technical data Installation Mounting instructions 6.1.1 Mixer with roof mounting 6.1.2 Mixer with wall mounting Mixer mounting and installation 6.2.1 General instructions 6.2.2 Mixer with roof mounting 6.2.3 Mixer with wall mounting...
  • Page 3 EC DECLARATION OF CONFORMITY IN CONFORMITY WITH THE DIRECTIVE 89/392 EC DODA di Doda Aldo & c. s.n.c. Via Contrargine sud, 3/5 46010 Canicossa (Mantova) hereby declare under our own responsibility that the equipment, mentioned below, MIXER SERIE BG conforms to the requirements of the EC Directives 98/37/CE (replacing the previous one 89/392/CE) and 94/9/CE concerning equipment intended for use in potentially Explosive Atmospheres (ATEX).

  • Page 4: Safety Instructions

    SAFETY INSTRUCTIONS Allowed employment The BG80 mixer has to be employed only to homogenize biomass present in a digester or in fermentation tanks , such as slurry, non-homogeneous matter and other co-ferments. With our mixer it is not allowed to mix the following substances: Mud obtained by clarification Solid bulky matters Bodies with sharp corners which could damage the mixer...
  • Page 5 Stickers The mixer is provided with the following stickers: Read the instruction manual! Warning! Danger! Warning! Flammable and explosive atmosphere! IMPORTANT: Before setting the machine in motion, fill it up with oil till the PRIMA DELL’USO RIEMPIRE D’OLIO indicated level. FINO A LIVELLO Fill up the machine with oi l till the indicated level.
  • Page 6 DESCRIPTION The BG80 mixer is specifically designed for biogas fermentation tanks, characterized by an high dry matter content. The mixer employment is aimed at preventing the development of settled and floating layers in the tank. To ensure an excellent mixing efficiency, the BG80 mixer is provided with an hydraulic device for the regulation of the tilt angle of the propeller in the tank.
  • Page 7 FUNCTIONING According to the requested installation, the mixer is provided with a roof or wall mounting frame. Usually the mixer arm inclines towards the left with regards to the tank wall, but on request the mixer can be supplied with arm leaning towards the right. The machine is equipped with a hydraulic device for the mixing propeller tilt regulation.
  • Page 8 If the tank is filled with already fermented substrate coming from other Biogas containers, there could be material floating on the surface, due to a high dry matter content. That could also occur in case of a fault in the Biogas plant and the consequent unforeseen mixer stopping.

  • Page 9: Technical Features

    TECHNICAL FEATURES The data indicated refer to a standard supply. The manufacturer reserves the right to introduce changes without prior notice. 1. All components touching the fluid , as well as all parts situated in the tank, are made of stainless steel.

  • Page 11: Installation

    Before installing the mixer, ask for the written authorisation of the person in charge with the wall static calculations. Doda is not responsible for possible tank damages caused by an unsuitable installation or use of the mixer. Explosion danger due to a thunderbolt! Arrange for a lightning protection system.
  • Page 12 A resistant sealing between the mounting frame and the concrete surface is ensured only if the surfaces surrounding the installation plate are polished and even. Danger of explosion due to biogas emissions! To ensure the mixer frame sealing, the tank cover has to be even enough, i.e. it has not to have hollows or unevenness! Check the correct grounding connection of the mixer! 6.1.2 Mixer with wall mounting...
  • Page 13 Danger of explosion due to biogas emissions! To ensure the mixer frame sealing, the tank cover has to be even enough, i.e. it has not to have hollows or unevenness! Check the correct grounding connection of the mixer! Near the mixer there have to be no trees, equipments or anything that could endanger its correct functioning.
  • Page 14 Mixer mounting and installation 6.2.1 General instructions The electric motors installed on our mixers are suitable for an outside installation, therefore humidity and dirt resistant, according to their IP55 protection degree. Anyway, for a correct motor and gearbox operating, the outside temperature has not to be lower than –10°C and higher than +40°C.
  • Page 15 Warning! Flammable and explosive atmosphere! No mounting or installing operations have to be carried out for any reason in potentially explosive atmosphere! The mixer can be installed and employed only in the allowed zones! As concerns the position of the dangerous zones, refer to the Classification of the potentially explosive zones which the user and the designer have to follow strictly! Notify any change made in potentially explosive areas influenced by the mixer and check if the new arrangement complies with the rules in force.
  • Page 16 Only adults can use the machine and absolutely in a place not accessible to children. Before any operation, check the stability of the whole working unit (machine and tractor). Do not carry out any repair, adjustment or maintenance operations if the unit is working or supplied.
  • Page 17 Put anti-seize grease on the bolt threads, to prevent the anchor bolts from locking before reaching the torque. After having built the mixer into the roof, tighten the anchor bolts. Check the bolt tightening after a few days. 6.2.3 Mixer with wall mounting Before mounting the mixer, check the dimensions of the hole made in the wall, as well as the correct mixer positioning.
  • Page 18 Electric connection Our mixer is standard supplied without electric switchboard. The motor starting has not to be direct but progressive (i.e. provided with soft starter, inverter, etc..), so that the mixer reaches the nominal rotation speed in about 3-5 sec. Avoid any sharp starting or stopping! We recommend the use of an inverter! Warning! Danger electricity!
  • Page 19 The motor is equipped with thermistors, so that an additional thermal protection of the machine could be used. (TMS / Thermal management system ) Attention! In case of an installation in compliance with ElexV regulations, employ only TMS trip device (trip device for cold conductors). PTC thermistors/probes have a maximum measurement and testing equal to 2,5 V.

  • Page 20: Setting In Motion

    SETTING IN MOTION 7.1 Check at the first setting in motion Check the motor rotation direction: the motor has to turn clockwise as indicated by the arrow on the motor. Start the motor for any seconds to check if the motor cooling fan turn rightwards. The mixing propeller has to turn clockwise as well.
  • Page 21 1) Drive line oil level 2) Drive line oil vent/ inlet 3) Gearbox oil level 4) Gearbox oil vent/level fig. 4 7.2 Checks before each setting in motion/ daily checkings Each time you set the unit in motion, check if the network or better the supply line complies with the regulations in law.
  • Page 22 7.3 Mixer Functioning Hazard of damages to the mixer and injuries to persons Follow the instructions indicated in Chapter 2. For a correct installation of the propeller, take into account the mixer tilt! Danger of explosion! Due to the overheating of the intermediate and lower bearings, caused by non-lubrication.

  • Page 23: Maintenance Program

    MAINTENANCE PROGRAM Check all bold and nut set on the mixer, the frame and all other components after the first 2 working hours and then after 100 operating hours (at the latest after 1 working month). Control the fixing anchor bolts on the mixer mounting frame and if necessary tighten them further on! SCREW TORQUE in Nm Bolt...
  • Page 24 Current maintenance The propeller waste depends on the working time and on the qualiity of the product to be mixed. If the power absorption is clearly lower than the highest nominal charge, you have to replace the worn-out propeller, as well as the self-locking M30 fixing bolts. During the replacement, check if the installation surfaces are clean.
  • Page 25 AUTHORIZATION TO OPERATE IN POTENTIALLY EXPLOSIVE ATMOSPHERES Fill in only the parts that concern you. Delete the parts that don’t concern you. Authorization to carry out welding, drilling, polishing, hammering and chiselling, and any other operation which can generate flames or sparks. This document is necessary also in case of employment of not flameproof equipments.
  • Page 26 Works to be carried out inside or close to tanks, equipments, pits, pipes, dismantled plant components, in narrow rooms etc. Further precautions. □ a. Transit permit…………………………………………No..……………………………..dtd…………………………………… □ b. Work permit………………………………………….. No.……………………………..dtd………….………………………… □ c. Safety documentation for electric systems………..No………………………………dtd………………………… □ d…………………………………………………………………………………………………………………………………………………… □...
  • Page 27 DOCUMENTATION ABOUT REPAIR AND MAINTENANCE HOUR WORK CARRIED OUT SIGNATURE OR STAMP OF THE PERSON IN CHARGE WITH WORK DONE...
  • Page 28 DOCUMENTATION ABOUT REPAIR AND MAINTENANCE DATE HOUR WORK CARRIED OUT SIGNATURE OR STAMP OF THE PERSON IN CHARGE WITH WORK DONE...
  • Page 37 COSTRUZIONE MACCHINE AGRICOLE di DODA ALDO & C SNC Via Sante Salmaso 18/20 46010 BUSCOLDO (MN) ITALY Tel. +39 0376/410043 - Fax. +39 0376/410032 http://www.doda.com Email: doda@doda.com...

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