US20190218461A1

US20190218461A1 - Organic polymer waste material disposal device

Info

Publication number: US20190218461A1
Application number: US15/576,132
Authority: US
Inventors: Zhixiang WAN; Zexin Zhu; Yongming Chen; Xixin Zhu; Xiyong Zhu
Original assignee: Zhu Songting; Guangdong New Environimental Protection Technologies Co Ltd
Current assignee: Zhu Songting
Priority date: 2016-08-31
Filing date: 2016-10-26
Publication date: 2019-07-18
Also published as: JP2019532798A; DE112016000566B4; WO2018040264A1; WO2018040264A8; CN106244186B; DE112016000566T5; CN106244186A

Abstract

The present invention provides an organic polymer waste material disposal device, which is mainly composed of a flue gas circulation system, a poor-oxygen cycle de-polymerization device, an oil-gas separation system and a waste residue collection system. The poor oxygen cycle de-polymerization device is divided into an inner chamber and an outer chamber, the flue gas circulation system sends low-temperature poor-oxygen gas to the inner chamber for de-polymerization reaction, and sends high-temperature flue gas to the outer chamber for auxiliary heating, which re-enters the flue gas circulation system; when the waste is subjected to poor-oxygen de-polymerization reaction, and has reaction in the inner chamber, the waste respectively enters the oil-gas separation system, and the waste residue collection system, thus producing the efficient separation of oil, gas and residue.

Description

FIELD OF THE INVENTION

The present invention relates to a polymer waste material disposal technique, and particularly to an organic polymer waste material disposal device.

BACKGROUND OF THE INVENTION

The complete combustion technology of polymer (organic) waste is a tough problem worldwide. Formation of high-end market demand for heat energy transformation of polymer (organic) waste and the demand for removing and reducing harmful substances are forcing us to adjust the scientific outlook on development as soon as possible. Polymer organic waste is a multi-base polymer (organic) waste having extremely complicated composition and chemical structure, even containing flame retardant composition in solid, liquid, gas phase. According to the existing related standards and technical specifications involving the domestic garbage, hazardous waste and medical waste issued by Ministry of Environmental Protection, typical polymer (organic) wastes according with the combustion characteristics of polymer (organic) waste are: waste plastics; waste rubber; waste paint ink; asphaltene residue oil; animal and plant fiber, protein, fat and so on.
The first reaction of the polymer (organic) waste in the high temperature field is gasification rather than combustion and the resulting paraffins combustible gas is thick black viscous with high volatility. Therefore, the complete combustion of the polymer (organic) waste must be an all-gas phase, and the combustion reaction process must be completed in one time in a certain space.
At present, it is difficult to find a real garbage incinerator without producing black smoke, for which the main reason is that the polymer (organic) waste is difficult to be completely combusted. Industrial parks for polymer upstream and downstream products, industrial parks for waste metal dismantling, livestock and poultry farms and cinerators are the severely afflicted areas by polymer (organic) waste, which have become the source of spreading organic pollutants and persistent organic pollutants.

SUMMARY OF THE INVENTION

In response to the present state of prior art, the objective of the present invention is to provide an organic polymer waste material disposal device mainly for the decomposition and efficient utilization of the organic polymer waste materials and such system is harmless to the atmospheric environment, and it is energy-saving, environmental-friendly and highly recycled.
In order to achieve the above objective, the present invention adopts the following technical scheme:
The present invention is an organic polymer waste material disposal device mainly composed of a flue gas circulation system, a poor-oxygen cycle de-polymerization device, an oil-gas separation system and a waste residue collection system, wherein the poor-oxygen cycle de-polymerization device is divided into an inner chamber and an outer chamber; the flue gas circulation system sends low-temperature poor-oxygen gas to the inner chamber, and sends high-temperature flue gas to the outer chamber, the high-temperature flue gas enters the flue gas circulation system again after passing through the outer chamber, the gas and waste residues respectively enter the oil-gas separation system and the waste residue collection system after reaction in the inner chamber (11).
In the above scheme, the feed end of the inner chamber of the poor-oxygen cycle de-polymerization device is connected with the mixing portion while the discharge end of the inner chamber is connected with the separation portion, and the poor-oxygen cycle de-polymerization device is provided with a U-shaped pipeline to communicate with the outer chamber.
Further, one side of the mixing portion is sequentially provided with a storage bin, a vibratory feeder and a screw conveyor from top to bottom, and the screw conveyor passes through the mixing portion and the poor-oxygen cycle de-polymerizatioin device.
In the above scheme, the flue gas circulation system mainly comprises a gas generating furnace, a first heat exchanger, a second heat exchanger and a flue gas scrubber; air enters the second heat exchanger for heating and then enters the first heat exchanger; the gas from the gas generating furnace passes through the first heat exchanger and meets the heated air to produce high-temperature flue gas which passes through the outer chamber and enters the second heat exchanger for cooling and the flue gas scrubber for dusting before being discharged.
Further, the second heat exchanger absorbs air with the help of a first induced draft blower and discharges the flue gas with the help of a second induced draft blower, the gas generating furnace connecting a blast-proof water block.
Further, the movement direction of the high temperature flue gas in the outer chamber is opposite to that of the low temperature gas and the polymer material in the inner chamber.
In the above scheme, the oil-gas separation system mainly comprises a cyclone separator, at least one condenser, an oil-water separator and a buffer tank, the oil and gas formed by the reaction in the inner chamber of poor-oxygen cycle de-polymerizatioin device entering the condenser after been dedusted by the cyclone separator, the oil entering the oil-water separator for separation and the gas as low hydrocarbon combustible gas passes through the buffer tank before entering other equipment; wherein the lower portion of the cyclone separator is connected with the waste residue collection system.
Further, the low hydrocarbon combustible gas enters the first heat exchanger for heating before being sent to the mixing portion.
The low hydrocarbon combustible gas coming from the buffer tank passes through the Roots circulation blower and the fire arrestor before it enters the first heat exchanger and/or other equipment for use.
In the above scheme, the waste residue collection system mainly comprises a cooling humidifying pipe, an exhaust pipe and a dust collector, the separation portion connecting the cooling humidifying pipe, and the dust collector being located on the exhaust pipe.
The advantages of this invention is that this invention adopts the poor-oxygen (anaerobic) hot gas circulation to validate the de-polymerization reaction of waste polymer organic matters, and the heating method is that anaerobic hot gas is directly in contact with the waste polymer material, and the high-temperature flue gas indirectly transfers heat with the waste polymer materials; the entire system is controlled by using micro-negative pressure so that harmful compositions of waste polymer materials in the pyrolysis can be effectively recycled and decomposed while the residual heat of the flue gas can be recycled, thus effectively saving energy and reducing emission. The invention has strong adaptability and can dispose majority of polymer wastes; it can continuously and automatically feed and discharge materials to improve production efficiency and reduce labor intensity; with high elasticity of production capacity, and it can flexibly adjust production. The resulting non-condensed gas, such as methane, ethane and other low-hydrocarbon combustible gases can be used for industrial furnace combustion without giving off harmful gases into the atmosphere, thus achieving the highly-efficient recovery of waste polymer organic materials, and turning waste into treasure.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of the present invention;

FIG. 2 is a process flow diagram of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

In order to provide a further understanding of the objective, characteristics and functions of the present invention, fully description is given below with a preferred embodiment and accompanying drawings. FIGS. 1 and 2 are schematic diagram of a preferred embodiment of the present invention. The present invention is an organic polymer waste material disposal device, mainly composed of a flue gas circulation system, poor-oxygen cycle de-polymerization device 1, an oil-gas separation system and a waste residue collection system. Wherein the poor-oxygen cycle de-polymerization device 1 is divided into an inner chamber 11 and an outer chamber 12, the inner chamber 11 being an alloy annular plate, the outer chamber 12 being made of heat-resistant concrete, the outer layer of which is added with a layer of metal reinforcement ring. The feed end of inner chamber 11 of the weak oxygen cycle de-polymerization device 1 is connected with the mixing portion 13, while the discharge end of the inner chamber 11 is connected with the separation portion 14 and the poor-oxygen cycle de-polymerization device 1 is provided with a U-shaped pipeline 10 to communicate with the outer chamber 12. The U-shaped pipeline 10 is connected to the outer chamber 12 of multi-section poor-oxygen circulation de-polymerization device 1 by splicing. The mixing portion 13 is provided with a storage bin 21, a vibratory feeder 22 and a screw conveyor 23 from top to bottom. The screw conveyor 23 passes through the mixing portion 13 and the poor-oxygen cycle de-polymerization device 1. Namely, the polymer materials drop into the vibratory feeder 22 from the storage bin 21 (particle size of the polymer materials controlled at 0-15 mm). The polymer materials enter the screw conveyor 23 which conveys the materials to the mixing portion 13 where the materials are mixed with low temperature poor-oxygen gas (low temperature poor oxygen or anaerobic gas at the temperature of 400-500 DEG C.), passes through the poor oxygen cycle de-polymerization device 1 for reaction under the impetus of the screw conveyor 23. In this part, the flue gas circulation system sends the low temperature poor-oxygen gas to the inner chamber 11 to have de-polymerization reaction with the polymer materials, and sends the high temperature flue gas to the outer chamber 12, the high temperature flue gas enters the flue gas circulation system again after passing through the outer chamber 12, the gas and waste residues respectively enter the oil-gas separation system and the waste residue collection system after reaction in the inner chamber 11. Wherein, the movement direction of the high temperature flue gas in the outer chamber 12 is opposite to that of the low temperature gas and the polymer materials in the inner chamber 11, forming shear temperature difference, which accelerates the reaction of the materials in the inner chamber 11.
The flue gas circulation system mainly comprises a gas generating furnace 31, a first heat exchanger 32, a second heat exchanger 33 and a flue gas scrubber 34, the second heat exchanger 33 absorbing air with the help of the first induced draft blower 41 and discharging clean flue gas with the help of the second induced draft blower 42, the gas generating furnace 31 being connected with the blast-proof water block 30. The air enters the second heat exchanger 33 for heating and enters the combustion chamber of the gas generating furnace 31 for combustion. The gas generating furnace 31 is charged with anthracite and water to react, and the generated flue gas meets with the heated air in the first heat exchanger to produce high temperature fuel gas, which passes through the outer chamber 12 and enters the second heat exchanger 33 for cooling (while the air at room temperature can be heated up) and the flue gas scrubber 34 for dedusting before being discharged, and the discharged air is clean. Wherein the flue gas burned in the first heat exchanger 32 is subjected to heat exchange with the partially reacted low hydrocarbon combustible gas and the resulting low temperature anaerobic gas enters the mixing portion 13 for mixing and reacting with the polymer materials.
The above-mentioned oil-gas separation system mainly includes a cyclone separator 51, at least one condenser 52, an oil-water separator 53 and a buffer tank 54. The oil and gas formed by the reaction in the inner chamber 11 of the poor oxygen cycle de-polymerization device 1, after being dedusted by the cyclone separator 51, enters the condenser 52 for cooling; the oil enters the oil-water separator 53 for separation; when there are multiple oil-water separators 53, an blending oil transition tank can be arranged to for collection in unison and the gas is a low hydrocarbon combustible gas, part of which passes through the buffer tank 54 and enters other equipment (such as reverberatory furnace and blast furnace). The preferably low hydrocarbon combustible gas exiting from the buffer tank 54 passes through the Roots circulation blower 50 and the fire arrestor 55 before entering the first heat exchanger 32 and other equipment for use, while the other portion of the low hydrocarbon combustible gas enters the first heat exchanger (32) for heating before being sent to the mixing portion (13). Wherein the lower portion of the cyclone separator 51 is connected with the waste residue collection system to sediment the particles in the oil and gas which enter the waste residue collection system in the company of the slag discharged from the poor-oxygen cycle de-polymerization device 1 for disposal.
The above-mentioned waste residue collection system mainly includes a cooling humidifying pipeline 61, an exhaust pipe 62 and a dust collector 63; the separation portion 14 is connected with the cooling humidifying pipeline 61. After carrying out cooling treatment to the slag produced by the reaction in the poor-oxygen cycle de-polymerization device 1, the metal-containing waste residue can be used to extract metal in the smelting workshops; the dust collector 63 is located on the exhaust pipe 62 to further dedust gas produced during the cooling of the waste residue by spraying before the gas is discharged into the air.
Of course, the above illustration is merely a preferred embodiment of the present invention and is not intended to limit the scope of applications of the present invention, and equivalent modification made according to the principles of this invention shall be included within the scope of the present invention.

Claims

1. An organic polymer waste material disposal device, comprising a flue gas circulation system, a poor-oxygen cycle de-polymerization device, an oil-gas separation system and a waste residue collection system, wherein the poor-oxygen cycle de-polymerization device is divided into an inner chamber and an outer chamber, the flue gas circulation system sends low-temperature poor-oxygen gas to the inner chamber and sends high-temperature flue gas to the outer chamber, the high-temperature flue gas enters the flue gas circulation system again after passing through the outer chamber, the low-temperature poor-oxygen gas and waste residues enter the oil-gas separation system and the waste residue collection system respectively after reaction in the inner chamber.

2. The organic polymer waste material disposal device according to claim 1, wherein a feed end of the inner chamber of the poor-oxygen cycle de-polymerization device is connected with a mixing portion while a discharge end of the inner chamber is connected with a separation portion, and the poor-oxygen cycle de-polymerization device is provided with a U-shaped pipeline communicated with the outer chamber.

3. The organic polymer waste material disposal device according to claim 2, wherein one side of the mixing portion is provided with a storage bin, a vibratory feeder and a screw conveyor in turn from top to bottom, wherein the screw conveyor passes through the mixing portion and the poor-oxygen cycle de-polymerization device.

4. The organic polymer waste material disposal device according to claim 2, wherein the flue gas circulation system mainly comprises a gas generating furnace, a first heat exchanger, a second heat exchanger and a flue gas scrubber, air enters the second heat exchanger for heating and then enters the first heat exchanger, gas from the gas generating furnace passes through the first heat exchanger and meets the heated air to produce high-temperature flue gas which passes through the outer chamber and enters the second heat exchanger for cooling and the flue gas scrubber for dedusting before being discharged.

5. The organic polymer waste material disposal device according to claim 4, wherein the second heat exchanger absorbs air with help of a first induced draft blower and discharges the flue gas with help of a second induced draft blower, and the gas generating furnace is connected with a blast-proof water block.

6. The organic polymer waste material disposal device according to claim 1, wherein a movement direction of the high temperature flue gas in the outer chamber is opposite to that of the low temperature gas and polymer materials in the inner chamber.

7. The organic polymer waste material disposal device according to claim 4, wherein the oil-gas separation system mainly comprises a cyclone separator, at least one condenser, an oil-water separator and a buffer tank, the oil and gas formed by the reaction in the inner chamber of the poor-oxygen cycle de-polymerization device enter the condenser after being dedusted by the cyclone separator, the oil enters the oil-water separator for separation and the gas is low hydrocarbon combustible gas which passes through the buffer tank before entering other equipment for use, wherein a lower portion of the cyclone separator is connected with the waste residue collection system.

8. The organic polymer waste material disposal device according to claim 7, wherein the low hydrocarbon combustible gas enters the first heat exchanger for heating before being sent to the mixing portion.

9. The organic polymer waste material disposal device according to claim 8, wherein the low hydrocarbon combustible gas coming from the buffer tank passes through a Roots circulation blower and a fire arrestor before entering the first heat exchanger and/or other equipment for use.

10. The organic polymer waste material disposal device according to claim 2, wherein the waste residue collection system mainly comprises a cooling humidifying pipeline, an exhaust pipe and a dust collector, the separation portion is connected with the cooling humidifying pipeline, and the dust collector is located on the exhaust pipe.