WO2006039770A1

WO2006039770A1 - Equipment and system destined for drying solid organic matter and utilization of the resulting product

Info

Publication number: WO2006039770A1
Application number: PCT/BR2005/000215
Authority: WO
Inventors: Jorge Cortizo Carvalho
Original assignee: MUNDO LIMPO SA
Current assignee: MUNDO LIMPO SA
Priority date: 2004-10-15
Filing date: 2005-08-14
Publication date: 2006-04-20
Anticipated expiration: 2007-04-15
Also published as: BRPI0404514A

Abstract

Equipment and system destined for drying solid organic matter and utilization of the resulting product, characterized by the fact that the dehydration chamber has feed inlet (2) to receive the waste that comes from a grinder (1), descending a ramp (3) installed on the upper part of a gas furnace (4). The waste is conducted to the central treatment chamber (7), which is supported on two supporting bases (5), the first of which also sustains a motor (6) that drives a gear (11), which in turn drives the dryer (7). Both bases have a pair of guide wheels (12). The Heat produced by the furnace (4) circulates inside the chamber (7), driven by the suction of a powerful outer blower (8), thereby increasing the temperature and pressure inside the chamber to treat the material, which is guided by fins (9) through the chamber and dehydrated while the particles and gases produced by the system are guided by a duct to the treatment unit.

Description

"EQUIPMENT AND SYSTEM DESTINED FOR DRYING SOLID ORGANIC MATTER AND UTILIZATION OF THE RESULTING PRODUCT"

This invention application is for a household solid waste (HSW) transformation system, which dehydrates and reduces waste volume through grinding and heat shock-induced moisture extraction, while controlling gas emissions in the points of suppression and combustion tolerance and sending such gases into a cyclone, from where they are sent to a gas treatment unit. The process seeks the utilization and the waste final destination, with control of the emission of gas particles from the treatment system to the atmosphere, thereby preventing the generation of leachate, the proliferation of vectors, the use of land fills and waste dumps, and especially the contamination of groundwater and the creation of holes in the ozone layer, as it impedes the generation of methane and carbon gases, which are produced by the decomposition of organic waste.

This invention is the result of nearly ten (10) years of research on the subject by the inventor, who has other previously applied patents pending, until the gravimetric, physical and chemical properties of household solid wastes were fully understood, making possible the development of a system capable to efficiently dehydrating and reducing waste volume, with the possibility of reusing the resulting product in various applications.

The use of this system is only possible thanks to the equipment developed especially for this purpose, which is basically made up of a rotary drier with unique features, that is, it enables organic compounds do be dehydrated, without igniting, until they are completely dry, while at the same time it impedes particles and gases produced in the system from being released into the atmosphere or the environment.

The main components of this dehydration system are a first dryer assembly comprising one or more dryers connected in parallel, with lower working temperature, and a second dryer assembly, connected in series in relation to the first dryer assembly, which second assembly is identical in all aspects to the first drier assembly except for its higher working temperature, which is controlled by outer panels.

As the invention in question is a modular system, it can be arranged otherwise, depending on specific requirements, and further units with the same characteristics may be coupled to form a single unit with the same capability to generate a contaminant-free dehydrated product.

The product obtained with this system may be used as a source of energy for the process itself. It may also be pressed into billets to replace firewood in furnaces or power plants. Yet another application is the use of the product for waterproofing the ground before paving, or in the manufacturing of bricks, blocks, etc. for civil construction.

The rotary φier in question is entirely novel and has great use to the public. It is designed to treat household solid waste (HSW), through waste volume reduction and dehydration, while controlling particle emission and treating the gases produced.

The invention is entirely comprehensible in the flowchart that accompanies and supports this documentation and by the description below, which contains the same reference numbers included to the attached drawing and describes the arrangement and operation of the rotary drier, enabling one to easily comprehend the entire arrangement, its parts and components: FIGURE 1 - illustration of the of the stages and operation of the drier for the process in question;

As seen in Figure 1, the unit has a feed inlet (2) for the waste coming from the grinder (1), which waste descends a guide ramp (3) installed on the upper inner part of a gas furnace (4), which will heat the air to be used to feed the drying system. The drying system comprises a drier mounted on two support bases (5), coupled to a motor (6), with a central treatment chamber (7) that is kept at a temperature ranging from 60° C to 100 ° C, in the first stage of treatment. The heat produced in the gas furnace (4) circulates through the treatment chamber (7), driven by a powerful suction blower (8), raising the temperature inside the main body to dehydrate the waste, which is then guided by fins (9) installed along the entire length of the treatment chamber (7), from where the material (13) exits for final disposal. Due to the heat shock, which causes dehydration, the organic waste releases gases and particles, which due to their properties and with the assistance of the suction blower are guided through a duct to the gas and particles treatment unit (10).

Each dryer chamber is supported by two concrete bases (5). A motor (6) is installed to the first of these bases to drive a gear (11), which in turn drives the treatment chambers. There is also a guide wheel (12) on each support base (5) to enable rotation of the assemblage.

Subsequently, the solid matter is sent to a second grinder (1') through a waste reception nozzle inlet (2'), conducted along a guide ramp (3'), which is also installed on the upper inner part of a gas furnace

(4'), which furnace will heat the air that feeds the second drying system

(7'). The elements of the second dryer will be the same as the elements of the first dryer, except temperature, which will range from 200° C to 250 ° C in the second stage of treatment.

Through this process, after being pre-dried, grinded twice, and treated in at least two rotary drying chambers fed by heat from a gas furnace and thermal shock, with temperature ranging from 60° C to 100° C in the first stage and 200° C to 250° C in the second stage, the organic matter is entirely dehydrated and its volume is reduced to 20% of the original volume, resulting in a product that can be used in civil construction in the form of bricks and as a replacement for firewood used in furnaces, after being pressed.

Claims

1 - EQUIPMENT AND SYSTEM DESTINED FOR DRYING SOLID ORGANIC MATTER AND UTILIZATION OF THE RESULTING PRODUCT, characterized by the fact that it is a modular dehydration unit comprising a feed inlet (2) for the waste coming from the grinder (1), which waste descends a guide ramp (3) that is installed on the upper part of a gas furnace (4). The waste is conducted to the central treatment chamber (7), which is supported by two bases (5), the first of which also supports a motor (6), which drives a gear (11), which in turn drives the dryer (7). On both bases there is a pair of guide wheels (12). The heat produced by the furnace (4) circulates inside the chamber (7), driven by a powerful outer blower (8), thereby increasing the temperature and pressure inside the chamber to treat the material, which is guided by fins (9) through the chamber and dehydrated as the particles and gases produced by the system are guided by a duct to a treatment unit.

2 - EQUIPMENT AND SYSTEM DESTINED FOR DRYING SOLID ORGANIC MATTER AND UTILIZATION OF THE RESULTING PRODUCT, according to claim 1, is characterized by the fact that it comprises at least two drying chambers (7-7'), connected in series, with the same components, and preceded by grinders (1-1'). The temperature of the first drying chamber (7) ranges from 6O⁰C and 100⁰C and that of the second chamber (7') ranges from 200⁰C to 250⁰C, and the thermal shock dehydrates the material.

3 - RESULTING PRODUCT, obtained according to the claims above, characterized by the fact that the dehydrated organic material may be used as source of energy for the process itself; or pressed into billets to replace firewood in furnaces; or used in the manufacturing of bricks, or other elements for civil construction.