WASTE PROCESSING SYSTEM
20220145184 · 2022-05-12
Inventors
Cpc classification
C10B53/00
CHEMISTRY; METALLURGY
Y02E50/10
GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
F23G5/20
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
C10B53/07
CHEMISTRY; METALLURGY
F23G5/033
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
Y02P20/143
GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
B09B3/00
PERFORMING OPERATIONS; TRANSPORTING
F23G2900/50201
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
F23G2209/20
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
F23G5/0273
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
B09B3/40
PERFORMING OPERATIONS; TRANSPORTING
F23G2202/103
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
F23G2204/103
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
International classification
B09B3/40
PERFORMING OPERATIONS; TRANSPORTING
C10B53/00
CHEMISTRY; METALLURGY
Abstract
A disposal system for the processing of solid waste devices to recycle materials located within the devices and recover, reuse and recycle such materials. Such system may include a primary chamber and secondary chamber, attached preferably by use of one or more exhaust ducts, and a secondary chamber exhaust duct. The solid waste devices may include any type of waste, such as electronics waste, medical device waste, and the like.
Claims
1. A waste processing system, comprising: a primary chamber section; and a secondary chamber section connected to the primary chamber section via an exhaust duct, wherein the primary chamber section comprises a heating chamber, a primary chamber disposed within the heating chamber, the primary chamber being configured to receive feedstock, and a burner configured to heat the heating chamber and the primary chamber, and wherein the secondary chamber section comprises a secondary chamber, and a secondary chamber exhaust duct connected to the secondary chamber.
2. The waste processing system according to claim 1, wherein the primary chamber is loaded with an inert gas.
3. The waste processing system according to claim 1, wherein the primary chamber section further comprises a lid that is configured to collect syngas produced while heating the heating chamber and the primary chamber.
4. The waste processing system according to claim 1, wherein the primary chamber section further comprises a cooling fan configured to cool the heating chamber.
5. The waste processing system according to claim 1, wherein the primary chamber comprises a plurality of heat transfer fins that are configured to transfer heat from the primary chamber to the heating chamber, and wherein the plurality of heat transfer fins are attached to an exterior surface of the primary chamber.
6. The waste processing system according to claim 5, wherein the plurality of heat transfer fins are made of the same material as the primary chamber.
7. The waste processing system according to claim 1, wherein the primary chamber section further comprises a drive motor configured to rotate the primary chamber, and wherein the drive motor is attached to a bottom surface of the primary chamber and the heating chamber.
8. The waste processing system according to claim 1, wherein the feedstock comprises computer or electrical equipment, or medical waste items.
9. The waste processing system according to claim 1, wherein the secondary chamber section further comprises a syngas combustion air fan configured to supply combustion air to the secondary chamber.
10. The waste processing system according to claim 9, wherein the secondary chamber section further comprises a syngas combustion air diffuser connected to the syngas combustion air fan and the secondary chamber exhaust duct.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
[0022] The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate preferred embodiments of the invention and together with the detailed description serve to explain the principles of the invention. In the drawings:
[0023]
[0024]
[0025]
[0026]
[0027]
[0028]
[0029]
[0030]
[0031]
DETAILED DESCRIPTION
[0032] In the following detailed description of the illustrative embodiments, reference is made to the accompanying drawings that form a part hereof These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention, and it is understood that other embodiments may be utilized and that logical or structural changes may be made to the invention without departing from the spirit or scope of this disclosure. To avoid detail not necessary to enable those skilled in the art to practice the embodiments described herein, the description may omit certain information known to those skilled in the art. The following detailed description is, therefore, not to be taken in a limiting sense.
[0033] The features, structures, or characteristics of the invention described throughout this specification may be combined in any suitable manner in one or more embodiments. For example, the usage of the phrases “certain embodiments,” “some embodiments,” or other similar language, throughout this specification refers to the fact that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present invention.
[0034] In the following detailed description of the illustrative embodiments, reference is made to the accompanying drawings that form a part hereof These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention, and it is understood that other embodiments may be utilized and that logical or structural changes may be made to the invention without departing from the spirit or scope of this disclosure. To avoid detail not necessary to enable those skilled in the art to practice the embodiments described herein, the description may omit certain information known to those skilled in the art. The following detailed description is, therefore, not to be taken in a limiting sense.
[0035] The examples described herein are for illustrative purposes only. As will be appreciated by one skilled in the art, certain embodiments described herein, including, for example, but not limited to, those show
[0036] Certain embodiments may provide a gasifier designed and built to process and efficiently extract metal and minerals from waste. The output obtained may include a synthetic ore in a format suitable for immediate hydrometallurgical refining According to certain embodiments, this may be accomplished by providing precise control of indirect heat in a gasification (which may also be starved oxygen or no oxygen at all) atmosphere within a controlled pressure chamber. The pressure chamber may include internal fins therein such that when the pressure chamber rotates, the internal fins may provide agitation, and milling media such as grinding balls for reduction to fines. The pressure chamber may include alternative gas inputs to adjust a primary chamber atmosphere.
[0037] According to certain embodiments, the overall process of processing the waste may be controlled by a programmable logic control (PLC) system. In certain embodiments, the PLC system may read the various process measures such as temperatures, pressures, rotational speeds, atmospheric concentrations, speed of fans, flows and other process data, and adjust the parameters of the system in ways to maximize the process as a whole. The PLC system may also measure gaseous emissions, where the gaseous emissions may be dosed to achieve a particular pH balance and to control pyrolosis. The PLC system may also adjust the processes and parameters of the system in response to the waste materials added, in a time dependent manner, to account for the type of waste added, the volume of waste, the harmful contaminants in the waste, and the like to maximize the ability to recycle the outputted materials.
[0038]
[0039] Also illustrated in
[0040] With the burner 5a, the internal area of the heating chamber 2 is heated to temperatures necessary to indirectly heat the feedstock which is contained within the primary chamber 1. Temperature ranges for this internal area can adjusted to account for the type of waste. In one embodiment, the temperature range would be up to 1000° C. This heating may occur at atmospheric pressure, and may ultimately generate synthetic gas from heating feedstock contained within the primary chamber 1. As the heating chamber 2 is heated, the heat of the chamber 2 may be preserved since the heating chamber 2 is made of an insulated shell. The insulated shell of the heating chamber 2 may include an outer layer and an inner layer. The outer layer of certain embodiments may be made of carbon steel, and the inner layer may be made of a high temperature insulating material that may be used in a furnace application. Such examples include ceramic fibers, refractory monoliths, or refractory brick.
[0041] To cool the primary chamber section 105,
[0042]
[0043] For example,
[0044] Prior to operating the primary chamber section 105, the primary chamber 1 may be loaded with feedstock or waste through an opening at the top of the primary chamber 1. To load the feedstock, a lid 11 that covers the opening of the primary chamber 1 is removed, and feedstock is disposed into the primary chamber 1. In certain embodiments, the lid 11 may be an exhaust hood. In other embodiments, the lid 11 may remove combustion products, fumes, smoke, odors, heat, and steam from inside the primary chamber 1 by evacuation and filtration. According to certain embodiments, the lid 11 may be formed from conventional materials that are either identical to or different from the materials that make up the primary chamber 1.
[0045] In certain embodiments, the feedstock may include batteries such as lithium ion batteries, mobile phones, laptops, computers, motherboards, and various other computer and/or electrical equipment or devices. In other embodiments, the feedstock may be medical waste items such as human waste contaminated equipment, hardware, medical devices that contain electrical circuits or other hardware, tubing, needles, glass, or other waste materials that may contain or be exposed to harmful pathogens or toxins, or even large hazardous waste boxes that contain medical waste. In some embodiments, the feedstock does not need to be broken down, and can instead be directly deposited into the primary chamber 1. However, if desired, the feedstock may be broken down into smaller parts before being loaded. For larger or heavier feedstock, a gantry may be used for loading into the primary chamber 1.
[0046] Once the feedstock has been loaded into the primary chamber 1, the lid 11 may be lowered to seal the opening of the primary chamber 1, and thereby maintaining an inert environment within the primary chamber 1. After sealing the primary chamber 1, residual oxygen within the primary chamber 1 may be removed by displacement with inert gas. Heat may also then be supplied indirectly to the primary chamber via the burner 5a. As the primary chamber 1 is heated, the gearbox 9 may drive the primary chamber 1 causing it to rotate. In addition, as the primary chamber 1 is heated, the feedstock may start to give off gas and disintegrate. Syngas is generated from the elemental material within the feedstock.
[0047] During the heating, according to certain embodiments, feedstock disintegration may occur at three different stages depending on the type and volume of feedstock used. However, in other embodiments, a fourth stage may be observed. The first stage may be observed at 250° C., the second stage may be observed at 400° C., and the third stage may be observed at 550° C. In addition, the temperatures at which these stages start and end may vary. The addition of an inert gas into the primary chamber allows for better control and makes the behavior of the feedstock more predictable.
[0048] According to certain embodiments, in addition to adding feedstock into the primary chamber 1, milling media may also be added. Milling media may be any used to crush or grind materials, such as balls, beads, cylinders, cut wire, or other shaped materials, and may be formed of materials such as steel, aluminia oxide, metal alloys, tungsten carbide, and the like. The mixing of milling media with the feedstock assists in pulverizing the feedstock into a powder-like concentrate. This grinding process may be helpful during the combined pyrolysis and gasification process as well. Moreover, it may help remove the already gasified layers from the feedstock and expose new layers making the process faster and more uniform.
[0049] As illustrated in
[0050] Ultimately, the toxic gases and syngas may be expelled into the atmosphere or can be captured and put back into the flow after reaching a secondary chamber 3. As previously noted, the primary chamber section 105 is connected to the secondary chamber 3 via the primary chamber exhaust duct 12. As illustrated in
[0051] Once the toxic gases and syngas reach the secondary chamber 3, they may remain within the secondary chamber 3 for a minimum period of time, such as for example for about 2 seconds. Once the time has elapsed, the gases may be exhausted out to a heat exchanger or boiler, and then to an emissions filter system (not shown).
[0052] As illustrated in
[0053] According to certain embodiments, the secondary chamber 3 may have a round tube shape, and the secondary chamber 3 may be fully insulated. In particular, the secondary chamber 3 may be made up of a carbon steel outer shell and a high temperature insulation inner layer. This inner layer may consist of any high temperature insulation; for example ceramic fiber, refractory monoliths, or refractory brick. During operation, the temperature within the secondary chamber 3 may be maintained at a minimum temperature via a natural gas burner, such as burner 5b. The length and diameter of the secondary chamber 3 may be set to give the syngas a minimum of two second retention time in the hot environment before exiting. Further, although
[0054] As illustrated in
[0055] In certain embodiments, the gasifier system 100 as a whole may be transported. For transportation, the gasifier system 100 may be disassembled into different components which are then reassembled at a later time for system use.
[0056]
[0057]
[0058] As further illustrated in
[0059] Further, extending from the bottom surface of the primary chamber 1 is a shaft 230. Attached to the shaft 230 is a lower seal hub 220 and a bottom bearing support flange 225. In certain embodiments, the shaft 230 may be driven by the gearbox 9, which in turn causes the primary chamber 1 to rotate. The lower seal hub 220 may provide a seal between the rotating shaft 230 and the heating chamber 2. The bottom bearing support flange 225 may consist of a drilled and tapped flange to accept a large diameter 4-way ball bearing capable of supporting the loading primary chamber 1.
[0060]
[0061]
[0062]
[0063]
[0064] At 405, the secondary chamber may be brought up to temperature or heated up during the loading process. However, in other embodiments, the secondary chamber may already be at an acceptable temperature from a previous batch. According to certain embodiments, the secondary chamber may be heated to a temperature range of about 1000° C. to about 1100° C.
[0065] At 410, the heating chamber may be heated and the primary chamber may be rotated. As the heating chamber is heated, it indirectly heats the primary chamber. Moreover, the rise in temperature of the primary chamber and heating chamber is constantly monitored and may be controlled. Once the feedstock has reached a temperature of about 500-600° C., at 415, the temperature may be stabilized and the rotation may commence for a controlled time depending on the type of feedstock and volume of feedstock. As the primary chamber heats up, the feedstock begins to give off gas in the form of syngas as it is being broken down.
[0066] At 420, the heating chamber burner 5a may be turned off, and the cooling fan may be started. During the cooling process, rotation of the primary chamber may continue. At 425, the secondary chamber may be turned off. Once the concentrate is at a low enough temperature for safe handling, at 430, the lid may be pulled away from the primary chamber, and the heating/primary component may be tipped into a downward position to dump out the leftover concentrate.
[0067] During the process 410 and 415, the produced syngas is collected in the lid 11, and burned in the secondary chamber 3, after which it is exhausted to the atmosphere or filtered further in an emissions system.
[0068]
[0069] The above-described embodiments provide significant improvements and advantages over conventional methods and systems for processing waste. For instance, according to certain embodiments, it may be possible to reduce e-waste to a concentrated ore containing minerals, metals, and carbon. It may also be possible to remove hydrocarbons and nonmetal and non-mineral components. According to other embodiments, it may be possible to solve the need for cost effective, environmentally superior, logistically decentralized capture and processing of a hazardous waste stream of which currently only a small percentage is being managed. It may further be possible to remove the negative consequences of e-waste storage, landfill disposal, incineration, and pyro metallurgical refming Likewise, the above-described embodiments may reduce medical waste, killing harmful pathogens and recycling materials contained in the medical waste.
[0070] According to other embodiments, it may be possible to enable the cessation of the harmful effects on humans in emerging markets where informal dangerous metals extraction processes are common. That is, use of the system for e-waste ensures secure auditable data storage media destruction at decentralized locations. According to certain embodiments, it may be possible to operate in a controlled temperature environment to maximize the recoverability of more metals and minerals than current higher temperature refinery solutions.
[0071] In yet further embodiments, it is not required to remove lithium ion batteries from e-waste such as from phones and laptops, and other portable devices. According to certain embodiments, it may also be possible to recycle lithium ion batteries, process and digest whole phones, laptops, and other electronic devices, and provide a process that involves less pre-processing than manual or pyro metallurgical processes for e-waste.
[0072] According to other embodiments, it may be possible to use hydro-metallurgical extract of previous metals such as gold, silver, and palladium using small-scale relocatable refineries. It may further be possible to enable a clear, highly concentrated post previous metals extraction residue to be refined with ease by copper smelters, and those seeking to recover cobalt, iridium, barium, erbium, praseodymium, and/or other rare earths.
[0073] Although the foregoing description is directed to the preferred embodiments of the invention, it is noted that other variation and modifications will be apparent to those skilled in the art, and may be made without departing from the spirit or scope of the invention. Moreover, features described in connection with one embodiment of the invention may be used in conjunction with other embodiments, even if not explicitly stated above.