WO2019085527A1 - Appareil de traitement de réaction de conversion de craquage et de réduction destiné à des déchets organiques ménagers - Google Patents
Appareil de traitement de réaction de conversion de craquage et de réduction destiné à des déchets organiques ménagers Download PDFInfo
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- WO2019085527A1 WO2019085527A1 PCT/CN2018/093426 CN2018093426W WO2019085527A1 WO 2019085527 A1 WO2019085527 A1 WO 2019085527A1 CN 2018093426 W CN2018093426 W CN 2018093426W WO 2019085527 A1 WO2019085527 A1 WO 2019085527A1
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- WIPO (PCT)
- Prior art keywords
- cracking
- conversion reaction
- reduction conversion
- processing apparatus
- organic waste
- Prior art date
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- 230000009467 reduction Effects 0.000 title claims abstract description 88
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- 238000012545 processing Methods 0.000 title claims abstract description 30
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- 238000002485 combustion reaction Methods 0.000 claims description 23
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Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
-
- Y—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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/141—Feedstock
- Y02P20/145—Feedstock the feedstock being materials of biological origin
Definitions
- the invention relates to a cracking reduction conversion reaction processing device for living organic waste, belonging to the technical field of environmental protection.
- the main treatment methods for organic waste in China are mostly oxidative incineration decomposition technology (incineration power generation), incomplete oxidative cracking gasification technology, and biological fermentation landfill rot gasification technology. Due to the complex composition and low calorific value of organic waste in towns and cities in China, it is necessary to add auxiliary fuel when incineration power generation and cracking gasification, which increases the cost of treatment.
- incineration power generation When incineration power generation is operated, harmful substances such as dioxins may be generated due to factors such as technology and operation. Landfill treatment takes up a large amount of land while seriously polluting the atmosphere and groundwater sources.
- the cracking gasification and secondary combustion of organic waste is called the third generation processing technology.
- the cracking gasification technology is an effective way to reduce organic waste, reduce pollution, and recycle resources.
- the pyrolysis gasification technology as disclosed in the patent document CN101457147A, CN206219517U, and CN106949479A has no problem from a theoretical point of view. In practice, it will find that the implementation effect is not ideal, so the industry It has never been promoted.
- the inability to isolate oxygen from the cracking reaction makes the cracking gasifier eventually become a small incinerator, which inevitably brings environmental problems such as dioxin emissions.
- the combustion of the combustion chamber mainly depends on the combustible gas generated by the cracking, the combustion of the combustion chamber is unstable, the combustion of the combustion chamber is unstable, and on the one hand, the incomplete combustion itself produces the emission of harmful substances; A complete cracking reaction cannot be carried out in the cracking furnace, and finally the cracking furnace only constitutes a crucible furnace.
- the object of the present invention is to overcome the deficiencies of the above method and technology, and to provide a cracking reduction conversion reaction processing device capable of realizing sufficient cracking reaction of domestic organic waste, and environmentally, efficiently and completely changing living organic waste into resource materials.
- the main technical solutions adopted by the present invention include:
- a cracking reduction conversion reaction processing apparatus for living organic waste comprising a closed rotary cracking reduction conversion reaction device and a heating device for indirectly heating the material inside from the outside of the closed rotary cracking reduction conversion reaction device .
- the cleavage reduction conversion reaction device comprises a horizontal cylinder that is rotatable about a horizontal axis.
- the cylinder comprises a feed port and a discharge port at both ends of the horizontal;
- the cracking reduction conversion reaction device further comprises a material propelling device for supplying organic material from the feed port to the cylinder, and a discharge conveying device comprising a solid product of an organic material discharged and/or recovered from the discharge port; a feed opening device of the material propulsion device and the discharge conveying device and a feed port of the cylinder
- the spout is connected to the rotary seal.
- the discharge conveyor is coupled to a cooling structure for reducing the discharge temperature of the solid product to a safe temperature for storage, the solid product comprising organic carbon.
- the casing of the material propulsion device is provided with a gas collecting pipe for collecting the gaseous phase product of the organic material.
- the gas collecting pipe is connected to a gas phase condensation bundling device for separating the dust-filtered gas phase product into tar, combustible gas and water for separate recovery.
- the combustible gas is used as a fuel in the heating device after being purified.
- the heating device comprises a heat conducting chamber, a burner, an oxygen supply fan and a fuel gas supply device, the fuel gas supply device and the oxygen supply fan supply fuel gas and oxygen to the burner for combustion, and the heat conduction chamber receives combustion
- the heat is transferred to the closed rotary cracking reduction conversion reaction unit to indirectly heat the organic material.
- the fuel gas supply device supplies a fuel gas including a combustible gas produced by the closed-rotation cracking reduction conversion reaction device (8).
- the method further comprises a pretreatment system device for processing the domestic organic waste into a uniform block of organic materials,
- an organic material conveying device and a feeding device for supplying the organic material to the closed-rotation cracking reduction conversion reaction device.
- a parameter control system device comprising a control device, a temperature sensor and a pressure sensor, the temperature sensor being disposed in the closed-rotation cracking reduction conversion reaction device (8), the pressure sensor being disposed in the a closed rotary cracking reduction conversion reaction device (8) and the heating device, the control device for absorbing moisture, pressure, temperature, reaction time and environment of the organic material according to the data fed back by the temperature sensor and the pressure sensor
- the rotational speed of the closed rotary pyrolysis reduction conversion reaction device (8) is precisely controlled.
- the parameter control system device further comprises a humidity sensor and/or a pH meter disposed in the cylinder, the control device for drying time and pH of the organic material according to the data fed back by the humidity sensor and or the pH meter Make adjustments.
- the parameter control system apparatus further includes a proportional control valve disposed in the fuel gas supply means in the heating means for adjusting the ratio of the fuel gas to the oxygen to control the degree of combustion.
- the parameter control system apparatus further includes a carbon monoxide detector disposed in the exhaust conduit of the heating device for online monitoring of the carbon monoxide emissions emitted by the burner and adjusting the burner proportional control valve based on the carbon monoxide emissions.
- a carbon monoxide detector disposed in the exhaust conduit of the heating device for online monitoring of the carbon monoxide emissions emitted by the burner and adjusting the burner proportional control valve based on the carbon monoxide emissions.
- the apparatus of the present invention is capable of fully performing a cracking reaction to simulate the formation process of coal, oil and natural gas in nature, not only by taking this reaction process, which takes hundreds of years in nature, through appropriate temperature, pressure, time and pH. Under the condition of (pH), it can be reproduced within a few hours, and the organic material as a raw material can be sufficiently subjected to the above reaction, thereby avoiding environmental problems caused by insufficient reaction.
- the amount of harmful gas generated is lower than international standards and national standards.
- the dioxin emission standard is 0.1 ng
- the emission of dioxins from domestic organic waste using the apparatus of the present invention is less than 0.02 ng, under some sample conditions. It is 0.005 ng, which is far superior to the emission standard.
- the device of the invention can achieve the technical effect described theoretically with the cracking reaction, and can completely convert the living organic waste into a harmless physical state through a harmless way, and convert into "oil” according to the organic molecular composition contained therein.
- Resource materials such as gas and carbon.
- beneficial effects of the present invention further include:
- the cracking reduction conversion reaction device is arranged in a horizontal and a rotating manner, and the material is continuously stirred in the reaction device, so that the reaction is sufficiently complete, so that a stable combustible gas product can be obtained without generating other harmful products.
- the heating device for supplying heat to the cracking reduction conversion reaction device is independently disposed with respect to the cracking reduction conversion reaction chamber (inside of the cylinder), and the heating device supplies heat only to the reaction chamber without introducing an open flame into the reaction chamber. This approach facilitates the placement of an environmental information collection device within the reaction chamber and, in turn, facilitates precise control of the internal environment of the reaction chamber.
- the burner receives the combustible gas obtained by the closed rotary cracking reduction conversion reaction unit and combusts therein to obtain heat supplied to the reaction chamber. Since the cracking reduction conversion reaction is sufficiently stable, the output of the combustible gas can be maximized, the quality is high, and the flow rate is stable, thereby effectively ensuring the combustion stability in the burner, and the self-production maximum meets the self-energy demand. The entire process achieves a stable energy cycle, minimizing the fuel supplied by the outside world, and greatly reducing operating costs.
- the device also includes a parameter control device to perform precise parameter control on the process of cracking, reduction and conversion reaction to ensure sufficient circulation balance and reaction of the entire system. For example, by collecting temperature, humidity, and pH data in the reaction chamber, the internal environment in the reaction chamber is controlled to maintain an ideal state or reacted according to an ideal control process; for example, by controlling the temperature of the gas phase condensation bundling device to make the tar oil and gas The separation is more thorough, avoiding undesired mixing resulting in a decrease in the quality of the combustible gas obtained after the separation, producing undesirable harmful products in subsequent combustion, and even affecting the temperature in the reaction chamber.
- a parameter control device to perform precise parameter control on the process of cracking, reduction and conversion reaction to ensure sufficient circulation balance and reaction of the entire system. For example, by collecting temperature, humidity, and pH data in the reaction chamber, the internal environment in the reaction chamber is controlled to maintain an ideal state or reacted according to an ideal control process; for example, by controlling the temperature of the gas phase condensation bundling device to make the
- This equipment can automatically sort and crush materials, and the composition and shape of materials can be effectively controlled, thus providing ideal materials for cracking reaction, which can avoid the influence of uneven quality of materials on the degree of reaction.
- the discharge port of the cracking reduction conversion reaction device is designed to directly discharge and/or recover the solid product “carbon”, which is not mixed with the gas phase product, and is convenient for separation and recycling.
- the gas treatment system can completely separate the gas phase product obtained by the cracking reduction conversion reaction device, and separate it into "tar, combustible gas and water", thereby facilitating separate recycling.
- FIG. 1 is a schematic view of a cracking reduction conversion reaction processing apparatus for living organic waste in an embodiment of the present invention.
- the invention relates to a cracking reduction conversion reaction processing device for living organic waste, which provides a cracking reduction conversion reaction treatment environment, creates a condition guiding material to be naturally reduced and decomposed according to its original attribute, and returns to the organic substance before returning to the organic substance. Harmless physical state.
- the cracking and reduction conversion reaction processing equipment of the domestic organic waste of the present invention comprises: a pretreatment system equipment, a cracking reduction conversion reaction system equipment, a gas treatment system equipment, and a parameter control equipment.
- the living organic garbage referred to in the present invention refers to garbage which is mainly composed of bio-organic matter, such as fruit and vegetable skin stalks, food residues, straws, dead branches and leaves, which are produced in daily life of human beings.
- bio-organic matter such as fruit and vegetable skin stalks, food residues, straws, dead branches and leaves
- these domestic organic wastes will inevitably be doped with some inorganic waste materials, such as glass bottles, construction waste, metals, batteries and so on.
- the present invention requires pretreatment of collected domestic organic waste to obtain an organic material, and the organic material finally entering the apparatus is composed of three elements of carbon, hydrogen and oxygen.
- the pretreatment system equipment includes: a scale 1, a gripper 2, a belt conveying magnetic separator 3, and a crusher 4.
- the magnetic separator 3 is transported to the belt to remove components such as metal and batteries; and is conveyed to the crusher 4 to be crushed into uniform block-shaped organic materials having a thickness of 50 to 100 mm and a thickness of less than 15 mm.
- this pretreatment system equipment By means of this pretreatment system equipment, a good quality organic material is obtained, which facilitates the subsequent cleavage reduction conversion reaction. Of course, it is not excluded that the quality of the organic domestic waste itself is collected. In this case, the pretreatment system equipment can be omitted. According to the actual situation, some or all of the devices of the pre-processing system device may be omitted without affecting the processing.
- the cracking reduction conversion reaction system apparatus includes a belt conveyor 5, a feed hopper 6, a material propulsion device 7, a closed-rotation cracking reduction conversion reaction device 8, a discharge screw conveyor 30, and a heating device 16.
- the belt conveyor 5 is for conveying the organic material obtained after the pretreatment to the feed hopper 6 on the side of the closed rotary cleavage reduction conversion reaction device 8.
- the material enters the material propulsion device 7 from the feed hopper 6 and is pushed by the material propulsion device 7 into the closed rotary cleavage reduction conversion reaction device 8.
- the material propulsion device 7 includes a screw disposed in a horizontal direction in the casing, and a first end of the casing is connected to the feed bin 6 and a second end is connected to the closed rotary type.
- the cleavage reduction conversion reaction device 8 is carried out.
- the horizontal screw extends from the first end to the second end, and even extends to the inside of the cracking reduction conversion reaction device 8, and a continuous blade disposed along the Archimedes spiral is formed on the screw for
- the Archimedes screw advancement mode advances the organic material received from the feed hopper 6 into the closed rotary cracking reduction conversion reaction unit 8.
- the material propulsion device can also hydraulically propel the material. The material is pushed laterally by the material propulsion unit 7 to the inside of the closed rotary cracking reduction conversion reaction unit 8.
- An operable closing device is disposed at the first end of the material propulsion device 7 or on the feed bin 6 after the expected weight or volume of organic material enters the closed rotary cracking reduction conversion reaction device 8 Before the reaction is started, the closing device is closed to form a closed oxygen-free space inside the closed rotary cracking reduction conversion reaction device 8.
- the closed rotary cracking reduction conversion reaction device 8 comprises a horizontal cylinder 9 which rotates around a horizontal axis during operation to ensure that the material maintains a balanced distribution in the cylinder at all times and ensures the cylinder
- the material in any part of the material has the same or substantially the same temperature at the same time.
- the rotation comprises a clockwise rotation and/or a counterclockwise rotation, ie the barrel 9 can be rotated forward and reversed.
- the barrel has a circular, polygonal or the like cross-section that is centrally symmetric about the horizontal axis.
- the cylinder 9 is designed to be horizontal, on the one hand, to facilitate the rotation of the cylinder; on the other hand, when the horizontal cylinder 9 rotates around the horizontal axis, the organic material is thrown and dropped, and this rotation form It is especially advantageous to stir the organic material evenly.
- the horizontal axis referred to herein is not limited to a strict level. It is conceivable that the cylinder is set to be slightly inclined as long as it does not affect the turning and stirring of the material in the cylinder, and is in the invention. Within the scope of protection. Similarly, horizontal screws for feeding and discharging are not necessarily critical. The horizontal setting is only a preferred solution.
- the rotation of the cylinder 9 is achieved by means of a motor and a toothed ring drive driven by a motor.
- a toothed ring may be fixedly provided on the outer surface of the cylindrical body 9, and the center line of the toothed ring is the rotational axis of the cylindrical body 9.
- the motor is engaged with the ring gear through a transmission to drive the cylinder 9 to rotate.
- the ring gears are arranged one, two or more depending on the scale of the cylinder 9.
- the motor allows the barrel 9 to rotate in the forward or reverse direction when needed, so that when rotated in one direction causes material accumulation in the barrel, the reverse rotation causes the material to be more evenly dispersed in the barrel, thereby further promoting uniform heating.
- the feeding port and the discharging port of the cylinder 9 are respectively located at two ends of the cylinder body, and the feeding port is sealedly connected with the casing of the material propelling device 7 by a sealing device 11.
- the sealing device is a bellows mechanical combination sealing device 11.
- the discharge port is also sealedly connected to the housing of the discharge screw conveyor 30 by a bellows mechanical combination sealing device 11.
- the screw of the material advancing device 7 extends into the cylinder 9 through the feed port of the cylinder 9.
- the inner wall of the cylinder 9 is provided with a spiral material guide plate 12 for guiding the material from the inside of the cylinder 9 to the discharge opening by means of the rotating action of the cylinder 9.
- the discharge screw conveyor 30 serves as a discharge conveying device for discharging and/or recovering the solid product after the reaction from the discharge port.
- the discharge screw conveyor 30 includes a casing and a screw disposed in the casing in a horizontal direction. As described above, one end of the casing is sealingly connected to the discharge port of the cylinder 9 and passes through the The discharge port communicates with the inside of the cylindrical body 9, and one end of the screw extends into the cylindrical body 9, and the other end extends in a direction away from the cylindrical body 9. Similar to the structure of the material advancing device 7, the screw of the discharge screw conveyor 30 is formed with continuous blades arranged along the Archimedes spiral for propelling the material inside the cylinder 9 by Archimedes screw propulsion. External output.
- An end of the housing of the discharge screw conveyor 30 remote from the barrel 9 includes a downwardly closable discharge opening.
- the discharge port is closed during the reaction, and after the reaction is completed, the organic carbon for discharging the reaction is opened.
- the discharge opening is connected to the vertically downward water-cooled discharge conveyor 13 by means of a discharge seal 15.
- the water-cooled discharge conveyor 13 includes a water jacket disposed outside the discharge conduit to provide water jacketed water circulation cooling to the organic carbon in the discharge conduit, and the organic carbon carbon discharge temperature is lowered to a safe temperature and then transported to the organic carbon storage device. 27 in.
- the interior of the barrel 9 is in communication with a gas collection conduit for collecting gaseous products produced during the dry distillation reaction.
- the gas collection conduit is attached to the side wall of the housing of the material propulsion unit 14 to be in gaseous communication with the interior of the barrel 9.
- the gas collecting duct is not disposed on the side wall of the rotating cylinder 9, but is disposed on the side wall of the casing of the stationary material propulsion device 14 to reduce the complexity of the connecting structure.
- the gas phase product is produced in the cylinder 9, there is almost no material in the material propulsion device 14, and there is no risk of blockage of the pipe inlet.
- the heating device 16 is used for heating the cracking reduction conversion reaction device 8 to remove moisture in the material inside the cylinder 9, so that the heat value of the material is improved, and the occurrence of the cracking reduction conversion reaction is promoted.
- the heating device 16 may be provided with one or more, and in the case where a plurality of heating devices are provided, one or more of them may be activated according to the demand of the heating. In this way, flexible heating of the cracking reduction conversion reaction device 8 can be achieved, and the temperature requirement of the organic material in the cylinder 9 can be satisfied.
- the heating device 16 includes a thermally conductive chamber 17 that is capable of transferring heat to at least a portion of the barrel 9.
- the heat transfer chamber 17 is disposed at the bottom of the cylindrical body 9, covers the bottom of the cylindrical body in the direction of the bus bar of the cylindrical body, and transfers heat generated in the heat transfer chamber 17 to the cylindrical body 9 by heat conduction, thereby realizing Indirect heating of the material in the cylinder. As the barrel 9 rotates, heat can be transferred from the different locations on the surface of the barrel 9 to the contents of the barrel.
- the heat in the heat-conducting chamber 17 is generated by combustion of a fuel (including a combustible gas obtained by separating the gas phase product of the cracking reduction conversion reaction device 8) by means of a self-aligning gas burner 18, and the oxygen supply fan 26 is used for the burner 18. Air or oxygen is supplied inside.
- the interior of the thermally conductive chamber 17 is made of a refractory insulating material to ensure that the greatest proportion of heat will be transferred to the barrel 9 rather than being dissipated.
- a gas control pipe or an air pipe connected to the burner 18 is provided with a proportional control valve 19 for controlling the ratio of air and gas entering, and capable of controlling the amount of heat generated by the combustion, thereby accurately controlling the heat transfer chamber 17 according to a predetermined temperature profile. Internal temperature. When the heat balance is reached in the burner and in the barrel, the temperatures are the same.
- the proportional control valve 19 is connected to a PLC controller which controls the proportional control valve 19 in accordance with the following temperature reaction conditions of the material in the cylinder 9.
- the flue gas generated by the combustion of the combustible gas in the furnace of the burner 18 is discharged directly by the cooling dust removal tower 24 to remove impurities.
- a wet filtration device is further included, and the acid harmful gas in the flue gas is removed by mixing reaction with the alkali liquid sprayed at 5% concentration.
- a carbon monoxide detector is preferably disposed in the exhaust pipe, and is connected to the PLC controller to detect the carbon monoxide emission contained in the flue gas in real time, and adjust the burner proportional control valve according to the carbon monoxide emission. 19. Increase the oxygen supply or increase the ratio of oxygen to fuel gas when the carbon monoxide emissions exceed a certain threshold; maintain the oxygen supply or maintain the proportion of oxygen and combustible gas when the carbon monoxide emissions are below a certain threshold, in short To keep carbon monoxide emissions to a minimum, so that the fuel gas can be fully burned in the burner. Some or all of these fuel gases are combustible gases produced by the cracking reduction reaction.
- the temperature profile can be divided into chronological order:
- the temperature in the cylinder 9 is maintained at 100-200 ° C.
- the function is to evaporate the moisture of the material in the cylinder, so that the material is uniformly heated and gradually dried to meet the material drying standard.
- Uniform heating as used herein and hereinafter means that the organic material at any part of the cylinder is at the same or substantially the same temperature at the same time. Uniform heating is one of the key technologies emphasized by the present invention, both in the drying stage and in the dry distillation stage. Or in the carbonization stage, it is desirable that the material is uniformly heated in the cylinder. Uniform heating in the present invention is achieved by continuously turning the material over the barrel. By continuous reversal is meant that the material is continuously inverted continuously or at known time intervals throughout the various stages of drying, dry distillation or carbonization.
- continuous flipping does not mean that the cylinder must be continuously rotated, or it can be rotated at a certain time interval, for example, by rotating for 2 minutes at intervals of 0.5 minutes, and then continuing to rotate in the same direction or in the opposite direction for 2 minutes, and then at intervals of 0.5 minutes.
- the drying standard of the material that normally satisfies the conditions of the dry distillation reaction is about 20% of the water content, and the duration of this stage is adjusted according to the water content of the material to be treated.
- the material is continuously heated uniformly and slowly heated to 450 ° C to 550 ° C and maintained.
- the role of this stage is to produce a large amount of flammable gas and tar oil and gas.
- the temperature is continuously raised at a temperature rising rate of 15 ° C to 20 ° C / min from the holding temperature in the drying stage. Increasing the temperature at this rate ensures stable stabilization of the subsequent retorting reaction.
- the dry distillation reaction begins to occur, the main products are methane, ethylene, ethane and carbon monoxide.
- the reaction time at this stage varies depending on the composition of the materials. The invention assists in judging whether the reaction is completed by monitoring the pressure inside the cylinder.
- the pressure gradually increases during the reaction, and the reaction end pressure gradually decreases.
- the control device detects a decrease in pressure, it judges that the reaction is over.
- the pressure is reduced to stabilize, the reaction is completely complete and the resulting gas phase product is substantially completely recovered.
- the temperature in the cylinder 9 is maintained at 580 ° C to 640 ° C, preferably 600 ° C. During this process, it is still continued to ensure that the material is evenly heated. The material after the full dry distillation reaction no longer produces a gas phase product, but gradually carbonizes to form a solid phase product organic carbon.
- the three-stage temperature control can be achieved by controlling the pressure in the heat-conducting chamber by the number of heating devices.
- the pressure in the heat transfer chamber and the temperature of the heat transfer chamber directly control the temperature stability in the cylinder to achieve the best three-stage work process and efficiency.
- the material in the reaction chamber can be fully subjected to a cracking reduction conversion reaction. Since the organic material reacts under the anaerobic condition in the sealed cylinder, the material does not burn and does not generate harmful gases such as dioxins. Ying et al., because the entire cylinder is sealed, does not emit dust and other particulate pollutants into the environment, and all organic materials are fully converted into "oil, gas and carbon".
- the gaseous fuel used in the heating device 16 is derived from the gas phase product of the closed rotary cracking reduction conversion reaction unit 8.
- the gas phase product is not used directly as the heating device 16, but requires a series of gas treatments, which will be described below.
- the apparatus of the present invention further comprises a gas treatment system apparatus, comprising: a steam separator 23, a dust purification purifier 21, a gas phase condensation bundling device 22, and an oil and gas water separator. 25.
- the gas collection pipe on the cracking reduction conversion reaction device 8 is provided with a steam separator 23, and the acidic toxic and harmful gas such as HCl, SOx and HF generated during the cracking reduction reaction is removed by wet absorption, for example, by Ca(OH). 2, NaOH and other alkaline substances are absorbed and removed, and the remaining gas phase products are pressure buffered to facilitate gas entry into subsequent processing procedures.
- the gas phase product enters the dust purifier 21 from the steam separator 23, and under the action of centrifugal force, the particles of the mixture of dust and oil and gas sink, and the gas escapes through the upper outlet, thereby removing the solid particles entrained in the gas phase product.
- the structure of the vapor phase condensation bundling device 22 is a conventional bundling device structure, which is externally cooled by a circulating water tank 29 to condense the steam therein to obtain a gas-liquid mixture after condensation.
- the temperature in the gas phase condensation bundling device 22 needs to be controlled, on the one hand, a temperature sensor is provided, and on the other hand, a temperature adjusting device is provided, which is connected to the parameter control system device, so that the temperature of the gas phase condensation bundling device 22 is controlled at At 10 ° C, tar oil and gas and combustible gas can be completely separated under this temperature condition. It is conceivable that a constant temperature water tank can be used instead of the temperature sensor and the temperature adjusting device, and the temperature of the gas phase condensation bundling device 22 can also be controlled at 10 °C. These temperature control means are all within the scope of the invention.
- the gas-liquid mixture enters the oil-water separator 25, and the tar, water, and combustible gas are separated.
- the tar is stored in the oil storage device 28, and can be recycled; the water can be discharged or recycled; the combustible gas is purified by the gas purifier 20 as a heating device 16
- the fuel is recycled, and the heat generated by the combustion of the combustible gas is used to maintain the temperature required for the cracking reduction conversion reaction.
- the recovered combustible gas may be passed directly to the heating device 16, or may be stored and passed to the heating device 16 as needed.
- the fuel gas for combustion in the heating device 16 to generate heat includes the recovered combustible gas and other fuel gases, which are supplemented by the combustible gas.
- the flue gas generated by the combustion of the fuel gas (including the combustible gas) in the furnace of the burner 18 is discharged by the cooling dust removal tower 24 to remove the impurities.
- a wet filtration device is further included, and the acid harmful gas in the flue gas is removed by mixing reaction with the alkali liquid sprayed at 5% concentration.
- the material in the cylinder 9 is uniformly heated according to the ideal temperature profile to ensure efficient operation of the system, and the present invention also includes a parameter control system device.
- the parameter control system device includes a temperature sensor, a pressure sensor, a humidity sensor, a pH meter, a carbon monoxide detector, a motor that drives the cylinder 9 to rotate, a burner proportional control valve 19, and/or an oxygen supply fan disposed in the barrel 9. 26, and a control device connected to these devices.
- the control device is configured to adjust the drying and holding time and the pH of the organic material according to the humidity sensor and the data fed back by the pH meter.
- the control device includes a variable frequency controller and a PLC controller.
- the variable frequency controller is used to adjust the air volume of the oxygen supply fan 26, and the PLC controller can adjust the burner proportional control valve 19.
- the fuel gas rate to the burner, and the fuel gas and air can be determined according to the temperature requirement of the organic material in the closed cylinder.
- the ratio is adjusted. For example, collecting the real-time temperature in the closed cylinder, compared with the set temperature, increasing the rate of the fuel gas flowing into the combustor when the real-time temperature is lower than the set temperature, that is, increasing the fuel gas supply amount; When the real-time temperature is higher than the set temperature, the rate of the fuel gas that is introduced into the combustor is reduced, that is, the fuel gas supply amount is reduced. And based on the fuel gas supply amount, the ratio of the fuel gas to the air is adjusted in a desired ratio.
- the PLC controller is also coupled to a carbon monoxide detector that is arranged to monitor the carbon monoxide emissions emitted by the burner on-line and to adjust the burner proportional control valve 19 based on the carbon monoxide emissions. Increase the oxygen supply or increase the ratio of oxygen to fuel gas when the carbon monoxide emissions are above a certain threshold; maintain the oxygen supply or maintain the ratio of oxygen to fuel gas when the carbon monoxide emissions are below a certain threshold, in short To keep carbon monoxide emissions to a minimum.
- the PLC controller is used to control the motor, temperature control, pressure control, humidity control, reaction time control and pH control.
- the control of the motor includes control of the start and stop of the motor and control of the rotational speed and the rotational direction of the cylinder 9 to achieve uniform heating and feed and discharge of the material in the cylinder.
- the temperature control includes detecting and controlling the temperature of the organic material in the cylinder and the heating or cooling rate to ensure that the organic material in the cylinder always meets the temperature requirement; and according to the temperature of the organic material in the cylinder and the rate of temperature rise or fall, The amount, rate and ratio of oxygen and fuel gases that pass into the burner are adjusted so that the temperature is always at the desired value.
- the pressure control includes detection and/or control of the pressure inside the cylinder of the closed rotary cracking reduction conversion reaction device 8, and detection and/or control of the pressure in the heat transfer chamber, and if a pressure drop is detected in the dry distillation reaction phase, it is determined as The dry distillation reaction ends.
- the humidity control includes controlling the humidity inside the cylinder of the closed rotary cracking reduction conversion reaction device 8, and determining whether the first drying phase is completed based on the humidity. For example, in the drying stage, the humidity in the closed cylinder is detected, and when the humidity is lowered to the set humidity, it is judged that the drying is completed.
- the pH control includes controlling the organic material in the barrel of the closed rotary cleavage reduction conversion reaction device 8. If the pH is deviated, an appropriate amount of acid or base may be applied to the barrel to adjust the pH. In particular, in the dry distillation reaction stage, the pH of the closed cylinder is detected. When the pH is deviated from the set pH, an acid or a base is added to the closed cylinder to stabilize the pH at a set pH, for example, setting a pH. It is 7-8 to facilitate the occurrence of the dry distillation reaction.
- control is precisely controlled, so that the material in the cylinder of the closed rotary cracking reduction conversion reaction device 8 is uniformly heated, and the predetermined reaction conditions of cracking, reduction and transformation are satisfied, and the continuous and efficient operation of the system is effectively ensured.
- the specific working principle is as follows. After the domestic organic waste enters the field, it is used as the raw material for use after being measured and stored, and the pretreatment is performed before the treatment, including but not limited to the removal of inorganic waste such as metal battery by the magnetic separation device.
- the obtained organic material is spirally advanced into a cracking reduction reaction unit for reaction, and the reaction includes a drying step, a dry distillation reaction step, and a carbonization step.
- the gas phase product obtained by the cleavage reduction reaction enters the gas treatment system equipment for treatment, and is separated into three products of oil, gas and water.
- the separated tar (oil) is stored as the main product of domestic organic waste and can be sold to the market.
- the obtained non-condensable gas (the main component is a combustible gas) is purified to obtain a high-purity combustible gas, which is introduced into a heating device to generate heat, and is supplied to a cracking reduction reaction device for use in a cracking reduction treatment.
- the gaseous products of these combustible gases are discharged by dust removal.
- the solid phase product obtained by the cleavage reduction reaction is organic carbon, which is separately cooled, recovered, and stored in the form of solid organic carbon after cooling.
- the whole process of the above-mentioned cracking reduction reaction is controlled by the parameter control system to ensure that the reaction is carried out under ideal conditions.
- the reaction is made uniform, fully carried out, and the recovered combustible gas is fully utilized as a fuel to provide heat for the material reaction.
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Abstract
L'invention concerne un appareil de traitement de réaction de conversion de craquage et de réduction destiné à des déchets organiques ménagers, l'appareil de traitement comprenant un dispositif de réaction de conversion de craquage et de réduction rotatif fermé (8), et un dispositif de chauffage (16) destiné à chauffer indirectement des matériaux dans ce dernier depuis l'extérieur du dispositif de réaction de conversion de craquage et de réduction rotatif fermé (8). L'ensemble du processus depuis le craquage jusqu'au traitement de gaz adopte un fonctionnement en cycle fermé en vue d'isoler des matériaux organiques de l'air, de sorte que le processus de traitement et l'évacuation soient complètement commandés, que le processus de réaction de matériaux organiques soit stable et que la sortie soit stable. Les matériaux organiques sont agités en continu et chauffés uniformément dans le dispositif de réaction, de sorte que la réaction soit complètement achevée, ce qui permet de maximiser la production de produits de ressources, tels que le gaz combustible et le goudron, et de réduire la génération d'autres produits nocifs. Le système entier réalise un cycle d'énergie, et le système lui-même présente un besoin réduit en carburant fourni extérieurement, ce qui permet de réduire considérablement la consommation d'énergie et les coûts de fonctionnement.
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PCT/CN2018/093426 WO2019085527A1 (fr) | 2017-11-03 | 2018-06-28 | Appareil de traitement de réaction de conversion de craquage et de réduction destiné à des déchets organiques ménagers |
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CN110339589B (zh) * | 2019-07-19 | 2021-05-11 | 吉林省威斯特固废处理有限公司 | 裂解还原反应釜的气体产物处理装置 |
CN111036650A (zh) * | 2019-12-20 | 2020-04-21 | 安徽家齐物业管理有限公司 | 一种新型环保生活垃圾处理方法 |
US11712682B2 (en) | 2020-08-14 | 2023-08-01 | Kuan-Hsin Chen | Catalyst, pyrolysis device and pyrolysis method |
CN112097274B (zh) * | 2020-08-24 | 2022-10-18 | 广东邦普循环科技有限公司 | 一种动力电池的真空裂解设备及其裂解方法 |
CN115446086A (zh) * | 2022-07-27 | 2022-12-09 | 南京中船绿洲环保有限公司 | 一种低温微负压热解试验装置 |
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