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Title:
METHOD & APPARATUS FOR CONTINUOUS PRODUCTION OF CHARCOAL FROM WASTE
Document Type and Number:
WIPO Patent Application WO/2018/154591
Kind Code:
A1
Abstract:
Present invention proposes a method and apparatus for continuous production of charcoal from waste where the method and apparatus comprises of continuously feeding the waste into a receptacle where the receptacle is connected to an assemblage of metallic ducts, which have one or more openings, heated by an external source and the assemblage of metallic ducts is fitted with a pushing mechanism to transport the waste from the proximal end connected to the receptacle to the distal end of the assemblage.

Inventors:
JAIN PANKAJ (IN)
Application Number:
IN2017/050568
Publication Date:
August 30, 2018
Filing Date:
December 04, 2017
Export Citation:
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Assignee:
JAIN PANKAJ (IN)
International Classes:
F23G5/00
Foreign References:
BR102012032651A22014-08-26
DE202016007348U12017-01-13
Attorney, Agent or Firm:
MENEZES, Shalini (Plot C-12 Navelcar Hill City,Bainguinim, Old Goa, Goa, Old Goa 2, IN)
Download PDF:
Claims:
We claim:

1. An apparatus for continuous production of charcoal from waste, said apparatus comprising of a receptacle; an assemblage wherein the assemblage comprises of one or more ducts having one or more openings to collect by-products, wherein the assemblage is connected to the receptacle at one end hereinafter known as the proximal end;

2. The assemblage of ducts is fitted with a pushing mechanism wherein the pushing mechanism transports the waste from the proximal end to the other end of the assemblage, hereinafter known as the distal end wherein the charcoal is collected at the distal end.

3. The apparatus for continuous production of charcoal from waste in claim 1 wherein the assemblage may contain one or more metallic ducts for the waste to travel through.

4. The apparatus of continuous production of charcoal from waste in claim 1 wherein the metallic ducts within the assemblage may be placed horizontally and stacked one on top of another.

5. The apparatus of continuous production of charcoal from waste in claim 1 wherein the individual metallic ducts may be sealed at both ends and connected to the adjacent duct by means of one or more orthogonal connecting mechanisms fitted along the longitudinal edge of the horizontal ducts.

6. The apparatus of continuous production of charcoal from waste in claim 1 wherein the pushing mechanism may be a screw conveyor or a piston.

7. A method for continuous production of charcoal from waste, the method comprising of a. Continuously feeding waste into a receptacle;

b. The assemblage of metallic ducts is heated by means of an external source ;

8. The method for continuous production of charcoal from waste in claim 1 wherein the waste may comprise of biowaste, agrowaste, biomass, algae, fungi, cyanobacteria, woodchips, wood shavings or sawdust or a combination thereof.

9. The method for continuous production of charcoal from waste in claim 1 wherein the by-products may be redirected to the assemblage of ducts as fuel for continued heating.

10. The method of continuous production of charcoal from waste in claim 1 wherein the temperature of the assemblage of metallic ducts may range from 200- 700 °C.

Description:
METHOD & APPARATUS FOR CONTINUOUS PRODUCTION OF CHARCOAL FROM WASTE

The following specification describes the invention and the manner in which it is to be performed.

CROSS-REFERENCE TO RELATED APPLICATIONS AND PRIORITY

[001] The present application claims priority from Indian Patent bearing application number 201721006095 filed on 21/2/2017.

TECHNICAL FIELD

[002] This invention relates to a method and apparatus for continuous production of charcoal from waste.

BACKGROUND OF THE INVENTION

[003] Charcoal is produced by pyrolysis wherein wood is heated in presence of limited/absence of oxygen. The wood may be heated either by placing it in a sealed receptacle and heating the receptacle by an external source or by setting the wood directly on fire and cutting off the oxygen supply after a certain stage. In the traditional process, some oxygen is continuously required which in turn burns a percentage (10%) of wood to ash thus reducing the recovery of charcoal. This method is not sustainable or viable as it entails deforestation to provide for the wood. This method of making charcoal is disallowed in certain countries for environmental reasons. [004] A carboriser is typically used to produce charcoal in batches. In this process, external heat is applied by either burning wood / agro waste in a sealed container using electricity / natural gas / or any other fuel. This increases the cost of manufacturing of charcoal as external fuel is used in the process. Alternatively, the wood may be directly set on fire in the presence of limited amount of oxygen. However, this leads to ash as a by-product which is undesirable.

[005] Biomass is a naturally abundant domestic energy source and the successor as an alternative to existing sources of energy. Biomass refers to non-fossil biodegradable organic material from plant, animal and microbial origin. Biomass materials include products, by-products, residues and wastes from agricultural and forestry activities, non-fossil and biodegradable fractions from wastes. Examples of biomass would be trees, grasses, agricultural crops, agricultural wastes, wood waste and their derivatives, bagasse, municipal solid waste, waste paper, waste from food processing as well as aquatic plants and algae animal wastes.

[006] Agro-waste is defined as waste which is produced from various agriculture activities. These agro-wastes include manures, plant stalks, hulls, leaves, and vegetable matter. Agro-waste is usually produced through farming activities. In farming situation, the agro-waste is often useless and will be discarded. The accumulation of agro-waste may cause health, safety, environmental, and aesthetic concern. Thus, this represents a problem which requires safe disposal.

[007] Biomass or agrowaste is considered renewable resource as it is derived from naturally occurring resources and if managed well, can be used without significant depletion of its source. [008] The existing methods for producing charcoal from agrowaste are batch processes requiring constant fuel supply. In these traditional methods Syngas is usually released in atmosphere and the biodiesel is not recovered.

SUMMARY OF THE INVENTION

[009] Before the present method and apparatus for continuous manufacture of charcoal from agrowaste are described, it is to be understood that this application is not limited to the particular system(s), and methodologies described, as there can be multiple possible embodiments which are not expressly illustrated in the present disclosures. It is also to be understood that the terminology used in the description is for the purpose of describing the particular implementations or versions or embodiments only, and is not intended to limit the scope of the present application. This summary is provided to introduce aspects related to continuous manufacture of charcoal from agrowaste. This summary is not intended to identify essential features of the claimed subject matter nor is it intended for use in determining or limiting the scope of the claimed subject matter.

[010] Accordingly, the present invention provides an apparatus for continuous production of charcoal from waste where the method and apparatus comprises of continuously feeding the waste into a receptacle where the receptacle is connected to an assemblage of metallic ducts, which have one or more openings, the assemblage of metallic ducts is fitted with a pushing mechanism to transport the waste from the proximal end connected to the receptacle to the distal end of the assemblage and the assemblage heated by an external source.

[011] Accordingly, the present invention provides a method for continuous production of charcoal from waste where the method and apparatus comprises of continuously feeding the waste into a receptacle where the receptacle is connected to an assemblage of metallic ducts, which have one or more openings, heated by an external source- and the assemblage of metallic ducts is fitted with a pushing mechanism to transport the waste from the proximal end connected to the receptacle to the distal end of the assemblage.

BRIEF DESCRIPTION OF THE DRAWINGS

[012] The foregoing detailed description of embodiments of a method and apparatus for continuous production of charcoal is better understood when read in conjunction with the appended drawings. For the purpose of illustrating of the present subject matter, an example of the apparatus is provided as figures; however, the invention is not limited to the specific method and system disclosed in the document and the figures.

[013] In the detailed description, an embodiment of a method and apparatus for continuous production of charcoal is described in detail with reference to the accompanying figures. In the figures, the left-most digit(s) of a reference number identifies the figure in which the reference number first appears. The same numbers are used throughout the drawings to refer various features of the present subject matter.

[014] Figure 1 illustrates an apparatus for continuous production of charcoal in accordance with an embodiment of the present subject matter.

[015] Figure 2 illustrates a side view of the apparatus for continuous production of charcoal in accordance with an embodiment of the present subject matter.

[016] It should be noted that the terms "first", "second", and the like, herein do not denote any order, quantity or importance, but rather are used to distinguish one element from another. Further, the terms "a" and "an" herein do not denote a limitation of quantity, but rather denote the presence of at least one of the referenced

DETAILED DESCRIPTION

[017] Some embodiments of this disclosure, illustrating all its features, will now be discussed in detail. The words "comprising," "having," "containing," and "including," and other forms thereof, are intended to be equivalent in meaning and be open ended in that an item or items following any one of these words is not meant to be an exhaustive listing of such item or items, or meant to be limited to only the listed item or items. It must also be noted that as used herein and in the appended claims, the singular forms "a," "an," and "the" include plural references unless the context clearly dictates otherwise.

[018] Various modifications to the embodiment will be readily apparent to those skilled in the art and the generic principles herein may be applied to other embodiments for method and apparatus for continuous production of charcoal from agrowaste. However, one of ordinary skill in the art will readily recognize that the disclosure for the present invention is not intended to be limited to the embodiments described, but is to be accorded the widest scope consistent with the principles and features described herein.

[019] Present invention proposes a method and apparatus for continuous production of charcoal from waste where the method and apparatus comprises of continuously feeding the waste into a receptacle 101 where the receptacle 101 is connected to an assemblage of metallic ducts 201, which have one or more openings, and the assemblage of metallic ducts 201 is fitted with a pushing mechanism 104 to transport the waste from the proximal end connected to the receptacle to the distal end of the assemblage.

[020] In the present invention, we replace the batch type carboriser with a continuous operation carboriser, which will only use an external source of heat at the initial stage and once the process has started, it will be a closed loop operation which will use the syngas generated as a by-product for further heating.

[021] In the present invention, bio diesel which is released during the process of pyrolysis is collected separately. In conventional process, this gets ignited during the process of pyrolysis and is not recovered and it releases fumes during burning which pollutes in the atmosphere.

[022] The bio diesel thus collected will be stored in tanks and can be used as an additional source of fuel (in addition to Syngas) to provide extra heat in the process of pyrolysis as and when required. The extra quantity can be sold to oil refineries for addition to automobile fuel as per the guidelines.

[023] The present invention details an apparatus comprising of an insulated rectangular heating chamber 102 having a temperature of 450°C-700°C and consisting of a conical hopper lOlat its upper extreme end. The agro waste is fed in continuously into this hopper by means of a continuous loading device such as a conveyor belt. The funnel of the hopper, inside the heating chamber is connected to one end of a pipe 103 which could be made from a metal or an alloy of metals. The pipe 103 is fitted with corkscrew conveyor 104 on the inside for pushing the agro waste in the pipe 103 from one end to the other end. The other end of this pipe 103 maybe connected to a second pipe 103 stacked beneath it and fitted with a corkscrew conveyor 104 in the opposite direction. The agro waste is sent through one or more such pipes or pairs of pipes before being discharged in a sealed, water-cooled container 106 as powdered charcoal.

[024] Each pipe 103 has one or more release outlets for collection of syngas and biodiesel vapours. These outlets are then connected outside the chamber to a sealed syngas collection receptacle and biodiesel condensate container respectively.

[025] Each of the corkscrew conveyors 104are connected outside the chamber by conventional connecting mechanism such as a chain-sprocket system 202 to a single gear box.

[026] The temperature of the heating chamber 102 is maintained by redirecting the syngas produced above into the heating chamber 102. The syngas thus introduced in the chamber 102 has to be ignited at the initial stages of the process. Once ignited, the temperature remains largely constant so long as the syngas is being channeled continuously into the heating chamber 102.

[027] In the event that the temperature in the heating chamber 102 drops below the prescribed lower limit, the biodiesel condensate may be additionally used as fuel to heat the heating chamber 102. The remaining biodiesel condensate may be sold in the markets for economic gains.

[028] The vapours from the burning of the fuel or syngas within the heating chamber 102 is released from the chamber 102 and are guided by means of one or more vents into the agro waste hopper 101 thus pre-heating the agrowaste before it is introduced into the pipe assembly 201. [029] In one embodiment three pairs of pipes 103 are stacked one on top of another.

[030] An other embodiment has a six metre long pipe 103 with a diameter of 450 mm.

[031] One embodiment has MS (mild steel) pipes 103. Yet another embodiment has cast iron pipes 103.

[032] Yet another embodiment has vents arranged all around the agrowaste hopper 101 in a circular fashion.

[033] One embodiment has a method for continuous production of charcoal from waste wherein the method comprises of continuously feeding the waste into a receptacle 101.

[034] Another embodiment of the invention has a receptacle 101 is connected to an assemblage of metallic ducts 201 at one end known as the proximal end.

[035] Yet another embodiment has an assemblage of metallic ducts 201 is fitted with a pushing mechanism 104 to transport the waste from the proximal end connected to the receptacle to the other end of the assemblage 201, known as the distal end.

[036] In another embodiment the assemblage of metallic ducts 201 are heated by means of an external source.

[037] One embodiment has the assemblage of metallic ducts 201 such that the metallic ducts 103 have one or more openings wherein said openings are fitted with mechanism for collecting the by-products. [038] In another embodiment the assemblage of metallic ducts 201 is connected at the distal end to a receptacle for collecting the charcoal produced.

[039] In one embodiment the waste may comprise of biowaste, agro waste, biomass, algae, fungi, cyanobacteria, woodchips, wood shavings or sawdust or a combination thereof.

[040] In another embodiment the assemblage 201 may contain one or more metallic ducts for the agrowaste to travel through.

[041] In another embodiment the metallic ducts within the assemblage 201 may be placed horizontally and stacked one on top of another.

[042] The present invention comprises of a method of continuous production of charcoal from waste in wherein in one embodiment the individual metallic ducts 103 may be sealed at both ends and connected to the adjacent duct by means of one or more orthogonal connecting mechanisms fitted along the longitudinal edge of the horizontal ducts.

[043] Another embodiment contains the individual metallic duct 103 may be sealed at one end and connected to the adjacent metallic duct 103 by means of a connecting mechanism.

[044] One embodiment is such that the pushing mechanism may be a screw conveyor 104.

[045] In one embodiment the assemblage of metallic ducts 201 may be in an enclosed chamber 102. [046] In another embodiment the assemblage of metallic duct 201 may be in an enclosed insulated chamber 102.

[047] In yet another embodiment the by-products may be redirected to the assemblage of metallic ducts 201 as fuel for continued heating.

[047] In another embodiment temperature of the assemblage of metallic ducts 201 may range from 200°C - 700°C.