Heat treatment device for landscaping waste

Abstract

The utility model discloses a landscaping waste heat treatment device which comprises a heat treatment system, and a condensation system and a purification system which are respectively communicated with the heat treatment system through pipelines. The heat treatment system is used for performing pyrolysis treatment on the waste; the condensing system is used for condensing high-temperature pyrolysis gas generated after the waste is pyrolyzed by the heat treatment system to form a liquid-phase product, and a non-condensable gas-phase product flows back to the heat treatment system and supplies heat to the heat treatment system after being combusted; and the purification system is used for purifying the furnace gas supplying heat to the heat treatment system and discharging the furnace gas after purification. According to the heat treatment device, the landscaping waste is subjected to continuous heat treatment, charcoal, vinegar and combustible gas are prepared, and the combustible gas is burnt back to serve as heat treatment energy; according to the device, carbon-liquid co-production is realized, and charcoal is used for improving soil, fixing carbon and increasing carbon sink; the vinegar liquid can be prepared into plant source series fertilizers which are used for garden plant growth, and the device has the remarkable advantages of high treatment efficiency, high additional value, strong carbon sequestration capability, good ecological benefits and the like.

Description

Technical Field

[0001] This utility model relates to a biomass waste resource utilization device, and more specifically, to a garden greening waste heat treatment device. Background Technology

[0002] As urban green coverage increases year by year, the amount of garden waste generated during greening maintenance is also increasing. Statistics show that Hangzhou Xixi National Wetland Park alone needs to remove up to 200 tons of garden waste annually. Garden waste typically refers to various plant remains such as branches, leaves, flowers, and fruits, as well as other greening trimmings, formed from the natural decay and fall of garden plants or from artificial pruning. Traditional methods of treating garden waste include incineration or landfill. Biomass incineration produces large amounts of carbon dioxide and VOCs, polluting the environment; landfilling consumes land and human resources, exacerbating the existing shortage of land resources. However, garden waste, as a biomass raw material, has enormous potential for secondary utilization. How to maximize the secondary utilization of garden waste without causing adverse environmental impact is a crucial issue in garden waste management.

[0003] Regarding the secondary utilization of garden waste, the most common approaches are composting and pyrolysis to produce biomass materials. Chinese patent CN201610223238.X, "A Simple Method for Mixed Composting of Garden Waste and Waste Vegetables," provides a mixed composting approach. This involves first uniformly mixing garden waste and waste vegetables, then adding EM compound bacteria and urea in specific proportions to obtain mixed compost material, and finally subjecting it to aerobic fermentation to produce compost. However, this composting method is only suitable for softer waste such as fallen leaves and fruits. It is not suitable for secondary utilization of plant branches and other greening pruning materials, which are hard, have a dense structure, and require a long fermentation period.

[0004] For garden waste such as garden trimmings that are unsuitable for composting, pyrolysis to produce biomass materials is more appropriate. Chinese Patent CN202011005297.2, "A Method for Converting Garden Waste into Matrix Material Using Superheated Steam," provides a method for converting garden waste into matrix material using superheated steam. High-temperature superheated steam heats the garden waste, causing it to rapidly heat up and undergo selective pyrolysis. Most phytotoxic substances are degraded, and after separation of gas and solid products, the solid product is used as matrix raw material; the gaseous product is reheated into high-temperature superheated steam and reused to heat the garden waste to induce the relevant reactions. While this method effectively solves the problem of utilizing garden waste such as garden trimmings that are unsuitable for composting, the direct contact between superheated steam and reactants requires high equipment airtightness, posing certain safety hazards. Furthermore, water has a high specific heat capacity, and raising the temperature of water vapor to the pyrolysis temperature is energy-intensive, which does not align with the initial goal of energy conservation. Utility Model Content

[0005] To address the numerous shortcomings and deficiencies in existing equipment and methods for treating landscaping waste, this invention provides a thermal treatment device for landscaping waste. This device, through a thermal treatment system and heat source, continuously heat-treats fragmented landscaping waste under anaerobic or low-oxygen conditions to produce biochar, wood vinegar, and combustible gas. The combustible gas is recovered and burned as the energy source for the continuous thermal treatment. This thermal treatment device enables co-production of biochar and liquid. The biochar is used to improve forest soil and sequester carbon; the wood vinegar, when properly compounded, can be used to produce a series of plant-derived fertilizers for the growth of landscaping plants. Compared with traditional composting and mulching methods, this device offers significant advantages such as high treatment efficiency, high added value, strong carbon sequestration capacity, and good ecological benefits.

[0006] The device of this invention achieves green and efficient co-production of carbon and liquid, with good environmental protection in the purification and emission of exhaust gas. The gaseous products of pyrolysis are completely recycled and burned to provide heat for the heat treatment system, resulting in high energy utilization (combustion chamber for combustible gas recycling, combustible gas return pipeline, and combustible gas energy supply). It significantly reduces the energy consumption of waste treatment and significantly improves the added value of waste and good ecological benefits.

[0007] To achieve the purpose of this utility model, this utility model provides a heat treatment device for landscaping waste, including a heat treatment system, a condensation system, and a purification system. The heat treatment system is connected to the purification system and the condensation system respectively through pipelines, wherein:

[0008] The heat treatment system pyrolyzes the waste.

[0009] The condensation system condenses the high-temperature pyrolysis gas generated by the heat treatment system. The condensed liquid in the high-temperature pyrolysis gas forms liquid phase products, and the gas that cannot be condensed forms gas phase products. These products are then returned to the heat treatment system and, after combustion, form high-temperature hot furnace gas to heat the heat treatment system.

[0010] The purification system purifies the furnace gas that is supplied to the heat treatment system through pipelines, and the purified furnace gas is then discharged into the air.

[0011] The heat treatment system pyrolyzes garden waste, and the resulting high-temperature pyrolysis gas enters the condensation system through pipelines for cooling. The condensed liquid in the high-temperature pyrolysis gas forms liquid phase products, while the non-condensable gas forms gas phase products, which are then returned to the heat treatment system. After combustion, they form high-temperature hot furnace gas, which supplies heat to the heat treatment system. The furnace gas, after supplying heat to the heat treatment system, enters the purification system through pipelines for purification, and the purified furnace gas is then discharged into the atmosphere.

[0012] The heat treatment system includes a hollow furnace gas circulation chamber and two relatively independent heat treatment components and a hot furnace gas supply component arranged vertically within the furnace gas circulation chamber. The heat treatment components are positioned above the hot furnace gas supply component. Hot furnace gas from the hot furnace gas supply component enters the heat treatment component from below through a hot furnace gas outlet, heating and pyrolyzing the heat treatment component and the material to be pyrolyzed within it. Alternatively, the heat treatment system includes a hollow furnace gas circulation chamber and a hot furnace gas supply component located outside the furnace gas circulation chamber. A heat treatment component is located within the furnace gas circulation chamber. Hot furnace gas from the hot furnace gas supply component enters the heat treatment component from the side wall of the furnace gas circulation chamber through a hot furnace gas outlet, heating and pyrolyzing the heat treatment component and the material to be pyrolyzed within it.

[0013] In particular, a furnace gas outlet is provided at the top of the furnace gas circulation chamber, which is connected to the purification system via a pipeline. The furnace gas, after being used to heat the heat treatment components, is discharged from the furnace gas outlet and enters the purification system.

[0014] In particular, the gas in the furnace gas circulation chamber does not come into direct contact with the landscaping waste and gas inside the heat treatment component. It only comes into contact with the heat treatment component, and the heat is transferred to the outer wall of the heat treatment component and then to the landscaping waste.

[0015] The space inside the furnace gas circulation chamber where the heat treatment components are installed is the heat treatment space, and the space where the hot furnace gas supply components are installed is the hot furnace gas supply space. The heat treatment space and the hot furnace gas supply space are separated into two relatively independent upper and lower parts by the guide plate of the hot furnace gas components.

[0016] The heat treatment space and the hot furnace gas supply space are connected through the hot furnace gas outlet.

[0017] In particular, the heat treatment assembly includes:

[0018] At least one set of cylindrical pyrolysis tubes fixedly installed above the furnace gas circulation chamber and placed horizontally to contain garden waste. Each set of pyrolysis tubes includes two pyrolysis tubes stacked one above the other, namely upper and lower pyrolysis tubes. The pyrolysis tubes are arranged along the transverse direction of the furnace gas circulation chamber, horizontally penetrating the left and right side walls of the furnace gas circulation chamber from left to right or horizontally penetrating the front and rear side walls of the furnace gas circulation chamber from front to back, and their two ends protrude outside the left and right or front and rear side walls of the furnace gas circulation chamber, respectively.

[0019] Gas product outlets are provided above the upper and lower pyrolysis pipes protruding from one side wall of the furnace gas circulation chamber to discharge the high-temperature pyrolysis gas generated by the pyrolysis of waste in the pyrolysis pipes; a feed inlet is provided above the upper pyrolysis pipe protruding from the other side wall of the furnace gas circulation chamber to guide landscaping waste into the pyrolysis pipes; and a discharge outlet is provided below the lower pyrolysis pipe protruding from the other side wall of the furnace gas circulation chamber to discharge the solid products generated by the pyrolysis of waste in the pyrolysis pipes.

[0020] Inside the furnace gas circulation chamber, a material transfer outlet is set below the upper pyrolysis pipe near the gas phase product outlet, and a material transfer inlet is set above the lower pyrolysis pipe. The material transfer inlet and material transfer outlet are connected by a material transfer pipe, so that landscaping waste is transferred from the upper pyrolysis pipe to the lower pyrolysis pipe.

[0021] In particular, a propulsion screw is fixedly installed inside the upper and lower pyrolysis tubes respectively. The propulsion screw is coaxial with the pyrolysis tube and is driven by a motor to push the waste entering the pyrolysis tube to move inside the pyrolysis tube. The motor is located outside the furnace gas circulation chamber.

[0022] In particular, the propulsion screws inside the upper and lower pyrolysis tubes rotate in opposite directions, transferring garden waste from the upper pyrolysis tube to the lower pyrolysis tube, maximizing the movement distance of the garden waste within the heat treatment chamber and increasing the heat treatment time.

[0023] In particular, the material transfer outlet below the upper pyrolysis tube is located directly above the material transfer inlet above the lower pyrolysis tube, which facilitates the transfer of waste from top to bottom.

[0024] In particular, a baffle is installed between the upper and lower heat pipes. The baffle is horizontally fixed below the upper pyrolysis pipe and above the lower heat pipe.

[0025] The baffle is fixed to the side wall of the furnace gas circulation chamber to control the direction of the furnace gas, so that the furnace gas travels in an "S" shape from bottom to top in the furnace gas circulation chamber.

[0026] In particular, the area of ​​the baffle is (0.75-0.95) times the bottom area of ​​the furnace gas circulation chamber, preferably (0.8-0.85) times; the thickness of the baffle can be 2-15cm, preferably 5-10cm.

[0027] In particular, the longitudinal length of the baffle is the same as the longitudinal length of the furnace gas circulation chamber; the transverse length is less than the transverse length of the furnace gas circulation chamber.

[0028] In particular, the lateral length of the baffle is (0.75-0.95) times the lateral length of the furnace gas circulation chamber, preferably (0.8-0.85) times.

[0029] In particular, the longitudinal side of the baffle is fixed to the longitudinal sidewall of the furnace gas circulation chamber, and the sidewall fixed to the longitudinal direction of the baffle is far away from the gas phase product outlet.

[0030] In particular, the lateral length of the baffle is less than the distance from the material transfer outlet / material transfer inlet to the side wall of the furnace gas circulation chamber away from the gas phase product outlet. That is, the horizontal distance from the material transfer outlet / material transfer inlet to the side wall of the furnace gas circulation chamber fixed to the longitudinal side of the baffle is greater than the lateral length of the baffle.

[0031] In particular, the longitudinal side of the baffle and the longitudinal side of the guide plate of the hot furnace gas supply assembly are respectively fixed on the opposite longitudinal sidewalls of the furnace gas circulation chamber, that is, the two are fixed on different longitudinal sidewalls of the furnace gas circulation chamber.

[0032] The baffle controls the flow direction of the hot furnace gas, preventing the gas from flowing vertically upwards directly and failing to fully contact the outer wall of the heat treatment components, thus wasting heat energy. In addition, the baffle allows the hot furnace gas generated in the combustion chamber to flow smoothly in the heat treatment component section of the furnace gas circulation chamber, maximizing the contact area and contact time between the furnace gas and the outer wall of the heat treatment components, thereby improving heat energy utilization.

[0033] In particular, the hot furnace gas supply assembly includes a combustion chamber, a horizontal guide plate, first and second vertical guide plates, and a gas recirculation inlet and several auxiliary air inlets are provided on the side wall of the combustion chamber. A hot furnace gas outlet is provided on the side wall of the combustion chamber away from the gas recirculation inlet.

[0034] The combustion chamber is located below the furnace gas circulation chamber;

[0035] A horizontal guide plate covers the combustion chamber. The lateral length of the horizontal guide plate is less than the lateral length of the furnace gas circulation chamber, and the gap between the horizontal guide plate and the side wall of the furnace gas circulation chamber forms the hot furnace gas outlet. The longitudinal length of the horizontal guide plate is the same as the longitudinal length of the furnace gas circulation chamber.

[0036] The first vertical guide plate is fixed at the bottom of the furnace gas circulation chamber and placed vertically; the second vertical guide plate is fixed below the horizontal guide plate and placed vertically; the first and second vertical guide plates are placed along the longitudinal direction of the furnace gas circulation chamber, and their length is the same as the longitudinal length of the furnace gas circulation chamber.

[0037] In particular, the horizontal guide plate is positioned above the auxiliary air inlet and the gas reburning inlet; the height of the first and second vertical guide plates is less than the height of the combustion chamber, and the first and second vertical guide plates are arranged alternately.

[0038] In particular, the auxiliary air inlet and the gas recirculation inlet are located on different side walls of the combustion chamber.

[0039] In particular, the guide plate covers the combustion chamber and divides the furnace gas circulation chamber into two relatively independent upper and lower parts, which respectively accommodate the heat treatment component and the hot furnace gas supply component. The part accommodating the heat treatment component is the heat treatment chamber, and the part accommodating the hot furnace gas supply component is the hot furnace gas supply chamber.

[0040] In particular, the guide plate is fixed to the side wall of the furnace gas circulation chamber where the gas return inlet is located, and the end of the guide plate away from the gas return inlet is the free end. The gap formed between the free end of the guide plate and the opposite side wall of the furnace gas circulation chamber where the gas return inlet is located forms the hot furnace gas outlet.

[0041] In particular, the ratio of the lateral length of the guide plate to the lateral length of the furnace gas circulation chamber is (0.75-0.95):1, preferably (0.8-0.85):1.

[0042] The three sides of the guide plate are fixedly connected to the three side walls of the furnace gas circulation chamber; the gap between one side of the guide plate in the lateral direction and the lateral side wall of the furnace gas circulation chamber forms a hot furnace gas outlet, and the hot furnace gas generated in the combustion chamber flows into the heat treatment component from bottom to top through the hot furnace gas outlet.

[0043] Specifically, the first and second vertical guide plates are rectangular flat plates, with a length equal to the longitudinal length of the furnace gas circulation chamber; their height is 1 / 5 to 4 / 5 of the combustion chamber height, preferably 1 / 3 to 1 / 2. The height of the first and second vertical guide plates is less than the height of the combustion chamber, but the sum of the heights of the first and second vertical guide plates is greater than the height of the combustion chamber. The first and second vertical guide plates are staggered. The thickness of the horizontal and vertical guide plates can be 2-15 cm, preferably 5-10 cm.

[0044] In particular, the purification system includes a purification component and an induced draft fan. The purification component is connected to the induced draft fan via a pipeline. The furnace gas discharged from the furnace gas outlet at the top of the heat treatment system enters the purification component for dust removal and purification through the pipeline under the action of the induced draft fan. The purified furnace gas is then discharged into the atmosphere from the induced draft fan.

[0045] The induced draft fan provides power to drive the flow of furnace gas in the furnace gas circulation chamber. When the induced draft fan is working, the furnace gas flows out of the outlet of the furnace gas circulation chamber and enters the purification device for dust removal and purification. The purified furnace gas is then discharged into the atmosphere from the induced draft fan.

[0046] In particular, the condensation system includes a condenser tube assembly and a circulating water tank that provides condensate to the condenser tube assembly. The condenser tube assembly is placed vertically, and the circulating water tank is connected to the inlet and outlet of the condenser tube assembly via conduits. Water in the circulating water tank flows into and out of the condenser tube assembly, thereby condensing the high-temperature pyrolysis gas entering the condenser tube assembly. The condensed liquid phase product flows out from the acetic acid outlet located at the bottom of the condenser tube assembly. The uncondensed gaseous product, i.e., the combustible gas, flows out from the combustible gas outlet at the top of the condenser tube assembly and is connected to the combustible gas recirculation inlet of the furnace gas circulation chamber via a conduit, thus transporting the uncondensed gaseous product to the combustion chamber for combustion and providing heat energy.

[0047] In particular, the condenser assembly consists of a first condenser and a second condenser sleeved on its outside, wherein the first and second condensers are coaxial; the diameter of the second condenser is larger than that of the first condenser, and condensed water flows into the interlayer between the first and second condensers to condense the gaseous products input into the first condenser.

[0048] In particular, a condenser baffle is fixedly installed along the axial section of the first condenser tube, dividing the interior of the first condenser tube into two relatively independent condensation compartments along the axial section, and the length of the condenser baffle is less than the length of the first condenser tube.

[0049] In particular, the length of the first condenser tube is greater than that of the second condenser tube, and an acetic acid outlet is provided at the bottom of the first condenser tube; a gas phase product inlet and a gas gas outlet are provided at the top of the first condenser tube, and the gas phase product inlet and the gas gas outlet are respectively located at the top of the two condensation compartments divided by the condensation baffle of the first condenser tube.

[0050] In particular, a circulation pump is installed on the conduit connecting the inlet of the circulating water tank and the condenser assembly. By adjusting the opening and closing of the circulation pump and its power, the flow rate of the water can be controlled, thereby adjusting the condensation effect.

[0051] In particular, the heat treatment device for garden and landscaping waste can also be fixedly installed on a load-bearing plate with rollers at the bottom, forming a movable continuous heat treatment device.

[0052] In particular, the entire device is equipped with casters at the bottom, and the garden waste heat treatment device is a mobile continuous heat treatment and vinegar recovery device.

[0053] The hot furnace gas supply assembly controls the generation of furnace gas and fixes the flow direction of the furnace gas to provide energy for the heat treatment process, thereby maximizing the utilization of thermal energy.

[0054] The purification system is used to extract the furnace gas from the hot gas circulation component, force the furnace gas to flow in the furnace gas circulation chamber, and after flowing into the purification system from the heat treatment system through the pipeline to form clean gas, it is discharged into the atmosphere.

[0055] The condensation component is used to condense the high-level pyrolysis gas generated during the heat treatment of garden and greening waste. The condensable components (mainly water vapor and wood vinegar) are collected and utilized after forming liquid (i.e. pyrolysis liquid phase products), while the non-condensable fuel gas (i.e. pyrolysis gas phase products) is returned to the hot furnace gas supply component, where it is burned to form hot furnace gas, which provides energy for the heat treatment component.

[0056] In particular, the fuel for the combustion chamber can be biomass fuel, garden waste, etc., with garden waste being the preferred option.

[0057] The heat treatment system includes a feeding device, at least one set of heat treatment components, and a discharging device; the heat treatment components are tubular structures, fixed through the furnace gas circulation chamber. The feeding device and the discharging device are installed at both ends of the heat treatment components.

[0058] In particular, the heat treatment assembly is divided into two parts: one exposed outside the furnace gas circulation chamber and the other inside the furnace gas circulation chamber. Both ends are exposed outside the furnace gas circulation chamber, while the rest of the middle part is placed inside the furnace gas circulation chamber. The feeding device and the discharging device are respectively installed at the two ends of the heat treatment assembly exposed outside the furnace gas circulation chamber.

[0059] In particular, the length of the heat treatment assembly is (1.05-1.2) times the front length of the heat treatment circulation chamber, preferably (1.05-1.1) times; the length exposed at one end outside the furnace gas circulation chamber is (50-90) cm, preferably (60-70) cm.

[0060] The heat treatment assembly includes a tube body, a propulsion screw, and a gaseous product outlet; the tube body is the main body of the heat treatment assembly and is a hollow tubular structure, with the propulsion screw embedded in the internal channel of the tube body; the gaseous product outlet is located on the outer wall of the tube body and is connected to the condensation system through a pipeline.

[0061] The tubes are evenly distributed along the height of the furnace gas circulation chamber, and each tube exists independently. The propulsion screw inside the tube is used to control the movement of landscaping waste within the tube and to achieve this movement through the screw.

[0062] In particular, the speed at which garden waste moves through the tube can be controlled by adjusting the rotation speed of the propulsion screw, thereby controlling the heat treatment time.

[0063] In particular, the selection of spiral speed is related to the type of garden waste. The heat treatment time for soft garden waste is 30-50 min, preferably 40 min; the physical treatment time for hard garden waste is 40-60 min, preferably 50 min.

[0064] In particular, the propulsion spirals in adjacent pipes are in opposite directions, which is used to control the movement of landscaping waste in opposite directions within adjacent pipes, so that the landscaping waste moves in an "S" shape through the pipes, maximizing the travel length of the landscaping waste and thus increasing the heat treatment time.

[0065] Each pipe contains one inlet and two outlets. The top pipe has a first inlet (feed inlet, connected to the feeding device), a second outlet (material transfer outlet), and a third outlet (gas phase product outlet). The bottom pipe has a material transfer inlet, a first outlet (discharge outlet, connected to the discharge device), and a second outlet (gas phase product outlet). The middle pipe has two outlets (material transfer outlet and gas phase product outlet) and an inlet (material transfer inlet). A passageway is provided between the material transfer inlets and outlets of adjacent pipes; this passageway serves as a material transfer pathway, providing a channel for the movement of landscaping waste within adjacent pipes.

[0066] Specifically, both the feed inlet and discharge outlet are located on the pipe ends exposed outside the furnace gas circulation chamber. The feed inlet is located on the top pipe, marking the starting point for the movement of landscaping waste; the discharge outlet is located on the bottom pipe, marking the ending point for the movement of landscaping waste. The material transfer inlet and outlet of each pipe are located on the pipe inside the furnace gas circulation chamber, near the side wall of the furnace gas circulation chamber. Each pipe also includes a gaseous product outlet, located on the pipe exposed outside the furnace gas circulation chamber.

[0067] Garden waste fragments enter the tube body of the heat treatment component after passing through the feeding device. Driven by the propulsion screw, the waste travels within the tube body, passing through the material transfer outlet and along the material transfer path, transferring to adjacent tube bodies via their material transfer inlets and outlets. The opposing propulsion screws within adjacent tube bodies allow the waste to travel in an "S" shape within different tube bodies until it exits from the discharge outlet. During this process, the outer wall of the tube body transfers heat from the hot furnace gas to the waste, enabling it to undergo heat treatment. The gaseous products generated during the heat treatment process flow from the tube body into the condensation component through the gaseous product outlet.

[0068] The condensation system includes a set of water jackets, a condenser and a circulating water tank. One end is connected to the gas phase product outlet of the heat treatment system, and the other end is connected to the gas combustion inlet of the furnace gas circulation chamber.

[0069] The water jacket covers the outside of the condenser and includes a liquid outlet and a liquid inlet, which are respectively the upper water outlet and the lower water inlet.

[0070] Notably, the upper outlet is located at the top of the water jacket, while the lower inlet is located at the bottom. Both the upper outlet and the lower inlet are connected to the circulating water tank, forming a circulation path for the condensate.

[0071] In particular, a circulation pump is installed in the channel between the lower water inlet and the circulating water tank, and the flow rate of condensate can be controlled by adjusting the opening and closing status of the circulation pump.

[0072] The condenser includes one air inlet, one air outlet, and one liquid outlet, which are respectively the gas phase product inlet, the gas fuel outlet, and the vinegar liquid outlet. The gas phase product inlet is located at the top of the condenser and is connected to the gas phase product outlet of the heat treatment component through a passage. The gas fuel outlet is located in the upper part of the side wall of the condenser and is connected to the gas fuel recirculation inlet passage on the side wall of the furnace gas circulation chamber. The vinegar liquid outlet is located at the bottom of the condenser and is used to recover the condensed liquid.

[0073] During the heat treatment of landscaping waste, the gaseous products generated flow out from the gaseous product outlet of the heat treatment unit, enter the condenser through the gaseous product inlet along the passage, and flow from top to bottom for cooling. After cooling and liquefaction, they form liquid, which is collected and stored at the bottom of the condenser. After heat treatment, the liquid can flow out from the liquid outlet at the bottom of the condenser for collection and reuse. The non-condensable fuel gas flows out from the outlet and enters the combustion chamber through the fuel gas return inlet of the furnace gas circulation chamber. After combustion, it forms hot furnace gas, providing energy for subsequent heat treatment.

[0074] Compared with the prior art, the present invention has the following beneficial effects:

[0075] 1. The device of this utility model can perform unified and efficient treatment of garden and greening waste, solving the problems of the large variety of garden and greening waste types and shapes, the need for graded classification and treatment, and the long processing time. It reduces the difficulty of treating garden and greening waste and greatly improves the treatment efficiency. At the same time, the device of this utility model is a mobile thermal treatment equipment with simple structure, simple operation and low installation threshold, which is very suitable for scenic parks with large land area and high difficulty in collecting waste.

[0076] 2. The device of this utility model uses a heat treatment system and a heat source to continuously heat treat garden waste fragments under anaerobic or low-oxygen conditions to produce biochar, wood vinegar and combustible gas. The combustible gas is recovered and burned as the energy source for continuous heat treatment, thereby reducing heat treatment costs and energy consumption.

[0077] 3. The device of this invention adopts a method of separating the furnace gas circulation chamber and heat treatment components, which can realize the co-production of biochar and liquid biochar. Biochar is used to improve forest soil and fix carbon. Vinegar solution can be compounded in proportion to make a series of plant-derived fertilizers for the growth of garden plants. Compared with traditional composting and mulching treatment, it has significant advantages such as high processing efficiency, high added value, strong carbon fixation capacity, and good ecological benefits. Attached Figure Description

[0078] Figure 1 This is a schematic diagram of the structure of the heat treatment device for landscaping waste of this utility model;

[0079] Figure 2 This is a schematic diagram of waste movement in the heat treatment device for landscaping waste of this utility model;

[0080] Figure 3 This is a schematic diagram of the gas circulation in the thermal treatment device for landscaping waste of this utility model;

[0081] Explanation of reference numerals in the attached figures

[0082] 1. Feed assembly; 2. Upper pyrolysis tube; 2A. Lower pyrolysis tube; 3. Propeller screw; 4. Gas phase product outlet; 5. Discharge assembly; 6. Material transfer channel; 7. Material transfer inlet; 8. Feed port; 9. Discharge port; 10. Furnace gas circulation chamber; 11. Combustion chamber; 12. Horizontal guide plate; 121. First vertical guide plate; 121A. Second vertical guide plate; 13. Gas reburning inlet; 14. Auxiliary air inlet; 15. Furnace 16. Gas outlet; 17. Purification component; 18. Exhaust fan; 19. First condenser tube; 20. Second condenser tube; 21. Circulating water tank; 22. Gas product inlet; 23. Gas outlet; 24. Water inlet; 25. Circulating pump; 26. Roller; 27. Vinegar outlet; 28. Material transfer outlet; 29. ​​Pipeline; 30. Hot furnace gas outlet; 31. Conduit; 32. Load-bearing plate; 33. Baffle; 34. Condensation baffle. Detailed Implementation

[0083] The present invention will be further described in detail below with reference to embodiments, and the advantages and features of the present invention will become clearer with the description. However, these embodiments are merely exemplary and do not constitute any limitation on the scope of the present invention. Those skilled in the art should understand that modifications or substitutions can be made to the details and form of the technical solution of the present invention without departing from the spirit and scope of the present invention, but such modifications and substitutions all fall within the protection scope of the present invention. However, the implementation of the present invention is not limited thereto.

[0084] The thermal treatment device for landscaping waste of this utility model will be described in further detail below with reference to the accompanying drawings and embodiments. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0085] In the description of this utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0086] like Figure 1 The bottom of the garden greening waste heat treatment device of this utility model is equipped with rollers 26, making it a mobile garden greening waste treatment device.

[0087] The garden waste heat treatment device of this utility model includes a heat treatment system, a condensation system, and a purification system. The purification system is connected to the heat treatment system via pipe 29; the condensation system is connected to the heat treatment system via pipe, wherein:

[0088] The heat treatment system pyrolyzes garden waste. Hot furnace gas is generated and flows within the heat treatment system. The furnace gas heating the garden waste does not come into direct contact with the garden waste. During the flow of the hot furnace gas within the heat treatment system, the hot furnace gas heats the garden waste and pyrolyzes it.

[0089] Garden and landscaping waste undergoes high-temperature pyrolysis treatment in a thermal treatment system, producing gaseous, liquid, and solid products. The gaseous product is fuel gas; the liquid product is acetic acid; and the solid product is biochar.

[0090] The condensation system is used to cool the high-temperature pyrolysis gas generated by the high-temperature pyrolysis of the heat treatment system, so that the components such as vinegar in it condense to form liquid products, and the gas that cannot be condensed forms gaseous products, i.e., combustible gas.

[0091] The purification system will purify the exhaust gas generated from the furnace gas after the heat treatment system is heated by water washing in the spray tower and adsorption treatment in the activated carbon box, so as to ensure that the exhaust gas emissions meet environmental protection requirements.

[0092] The heat treatment system includes a hollow furnace gas circulation chamber 10, and relatively independent heat treatment components and hot furnace gas supply components arranged above and below each other in the furnace gas circulation chamber. The heat treatment components are located above the hot furnace gas supply components. The hot furnace gas from the hot furnace gas supply components enters the heat treatment components from below through the hot furnace gas outlet 30 to heat and pyrolyze the heat treatment components and the materials to be pyrolyzed inside the heat treatment components.

[0093] The furnace gas circulation chamber 10 is rectangular in shape and made of high-insulation material, providing heat insulation and thermal insulation. The upper part of the furnace gas circulation chamber is the heat treatment space for the heat treatment components; the lower part of the furnace gas circulation chamber is the hot furnace gas supply space for the hot furnace gas supply components.

[0094] The heat treatment chamber and the hot furnace gas supply chamber are separated into two relatively independent parts by the guide horizontal plate 12 of the hot furnace gas supply component, and are connected to each other by the hot furnace gas outlet 30.

[0095] The function of the furnace gas circulation chamber is to provide a passage for the furnace gas formed after combustion of the fuel gas, and to heat the heat treatment system during the circulation of the furnace gas. The furnace gas circulation chamber is a furnace gas passage composed of refractory materials, which can be refractory bricks or cast using high-temperature cement.

[0096] The horizontal direction of the furnace gas circulation chamber is from left to right; the vertical direction is from front to back; and the vertical direction is from top to bottom.

[0097] A furnace gas outlet 15 is located at the top of the furnace gas circulation chamber, which is connected to the purification system 16 via a pipe 29. Under the action of the induced draft fan 17, the low-temperature furnace gas heated by the heat treatment components is extracted from the furnace gas circulation chamber and enters the purification system for purification treatment. The induced draft fan is connected to the purification system via a pipe. The purification system consists of a spray tower and an activated carbon adsorption box, which are conventional purification equipment already existing in the field.

[0098] The purification system and induced draft fan are started and running when this unit begins operation.

[0099] A gaseous product outlet 4 is provided above the right end of the upper pyrolysis tube of the heat treatment system. It is connected to the condensation system through a pipe 29. The high-temperature pyrolysis gas generated by the pyrolysis of garden waste flows out of the heat treatment system from the gaseous product outlet 4 and flows into the condensation system for condensation.

[0100] The high-temperature pyrolysis gas condenses in the condensation system, and the temperature decreases. The condensable volatile gases condense into liquids, forming the liquid phase products of the pyrolysis treatment, while the non-condensable gases form the gas phase products (combustible gases) of the pyrolysis treatment.

[0101] The condensation system and purification system are located outside the heat treatment system. The heat treatment system is connected to the purification system through pipelines. Under the action of the induced draft fan connected to the purification system, the furnace gas is forced to flow in the heat treatment components, continuously heating the heat treatment components. After heating the heat treatment components, the furnace gas flows out from the furnace gas outlet of the heat treatment system and enters the purification system. After purification, it is vented. The heat treatment system is connected to the condensation system through pipelines. The high-temperature pyrolysis gas generated by heat treatment is condensed by the condensation system to form liquid phase products. The uncondensed components flow out of the condensation components through the gas outlet 22 of the purification system and flow into the hot furnace gas supply components through the gas return inlet 13 via pipelines. After combustion, they form hot furnace gas and participate in the flow heat transfer.

[0102] The hot furnace gas supply assembly includes a combustion chamber 11, a horizontal guide plate 12, first and second vertical guide plates 121 and 121A, a gas recirculation inlet 13, one or more auxiliary air inlets 14, and a hot furnace gas outlet 30, wherein:

[0103] The combustion chamber is located below the furnace gas circulation chamber 10;

[0104] The guide plate covers the combustion chamber. The lateral length (length from left to right) of the guide plate is less than the lateral length of the gas circulation chamber, and the gap between the guide plate and the left side wall of the gas circulation chamber forms the hot gas outlet 30. The longitudinal length (length from front to back) of the guide plate is the same as the longitudinal length of the gas circulation chamber.

[0105] The horizontal guide plate divides the furnace gas circulation chamber into two relatively independent upper and lower spaces, which respectively house the heat treatment components and the hot furnace gas supply components. The space housing the heat treatment components is the heat treatment chamber, and the space housing the hot furnace gas supply components is the hot furnace gas supply chamber (i.e., the combustion chamber). The upper heat treatment chamber is larger than the lower hot furnace gas supply chamber.

[0106] The first vertical guide plate 121 is fixedly installed at the bottom of the furnace gas circulation chamber and placed vertically; the second vertical guide plate 121A is fixedly installed on the lower surface of the horizontal guide plate and placed vertically; the first and second vertical guide plates are placed along the longitudinal direction of the furnace gas circulation chamber, and their length is the same as the longitudinal length of the furnace gas circulation chamber; the height of the first and second vertical guide plates is less than the height of the combustion chamber, and the two are arranged alternately, so that the hot furnace gas generated by combustion in the combustion chamber forms a wave-shaped undulating flow under the action of the horizontal guide plate and the first and second vertical guide plates. The action of the guide plates will cause the furnace gas to change its running direction, thereby forming a wave-shaped (S-shaped) movement trajectory, increasing the flow path length, and making the gas fully combusted.

[0107] The horizontal guide plate 12 and the first and second vertical guide plates control the circulation direction of the hot furnace gas, and are used to guide the heat generated by the combustion of fuel in the combustion chamber (i.e., the hot high-temperature furnace gas) from the hot furnace gas supply component below the furnace gas circulation chamber to the heat treatment component above the furnace gas circulation chamber.

[0108] The auxiliary air inlet 14 is located on the lower part of the front side wall of the furnace gas circulation chamber to supplement fresh air into the combustion chamber and ensure that the combustible gas and other fuels entering the combustion chamber from the gas return port are fully burned.

[0109] The number of auxiliary air inlets is determined based on the actual combustion conditions. In this embodiment, there are two auxiliary air inlets.

[0110] The gas recirculation inlet 13 is located on the lower part of the right side wall of the furnace gas circulation chamber and above the combustion chamber; combustible gas is introduced into the combustion chamber for combustion to generate hot furnace gas with high heat.

[0111] The horizontal guide plate is positioned above the auxiliary air inlet and the gas recirculation inlet, and its height is higher than that of the auxiliary air inlet and the gas recirculation inlet. The auxiliary air inlet is positioned lower than the height of the first vertical guide plate 121.

[0112] Combustion chamber 11 provides heat energy for the thermal treatment of landscaping waste. It is an open device located at the bottom of furnace gas circulation chamber 10, near the gas return inlet 13 of furnace gas circulation chamber 10. The interior of the combustion chamber is composed of refractory materials such as refractory bricks and high-temperature cement. The horizontal guide plate and the first and second vertical guide plates are cast with high-temperature cement and refractory materials or fixed in the combustion chamber with stainless steel plates.

[0113] In this embodiment, the combustion chamber is located at the bottom of the furnace gas circulation chamber as an example. The hot furnace gas supply space (combustion chamber) can also be located on the side of the furnace gas circulation chamber. The heat treatment space and the hot furnace gas supply space are arranged side by side or front and back. The gas is first burned in the combustion chamber to form furnace gas. The furnace gas enters the heat treatment chamber and heats the heat treatment system.

[0114] The furnace gas circulation chamber of this invention is illustrated using a cuboid shape as an example. Any other three-dimensional shape is applicable to the invention, such as a cylinder, cube, prism, etc.

[0115] The fuel burned in the combustion chamber can be garden waste to be treated, uncondensed combustible gas (gas phase product of pyrolysis treatment) recycled from the condensation system, or other combustibles such as charcoal, coal gas, natural gas, cotton and linen, etc. All of these are applicable to this invention. During the combustion of the dye in the combustion chamber, a corresponding combustion aid is added, such as fresh air introduced from the auxiliary air inlet in the specific embodiment of this invention, or other combustion aids such as oxygen.

[0116] The gas reheat inlet 13 is connected to the gas outlet 22 of the condensation system through a pipeline. The pyrolysis gas generated from the heat treatment of garden waste is condensed by the condensation system. The non-condensable combustible gas flows out from the gas outlet 22 and flows back to the combustion chamber through the gas reheat inlet via a pipeline. It is then burned to form hot furnace gas and flows as hot gas.

[0117] The right side of the guide plate 12 is fixed to the right side wall of the furnace gas circulation chamber, while its left end is a free end. The gap between the left end of the guide plate and the left side wall of the furnace gas circulation chamber forms the hot furnace gas outlet 30.

[0118] The horizontal guide plate is located below the heat treatment assembly. The horizontal guide plate, the first guide plate, and the second vertical guide plate control the direction of the hot furnace gas, so that the hot furnace gas starts from the combustion chamber 11 and travels in an "S" shape from bottom to top along the outer wall of the heat treatment assembly.

[0119] The guide plate is a rectangular flat plate with the same longitudinal length as the furnace gas circulation chamber and a slightly shorter transverse length than the furnace gas circulation chamber. The ratio of the transverse length of the guide plate to the transverse length of the furnace gas circulation chamber is (0.75-0.95):1, preferably (0.8-0.85):1. This allows the hot furnace gas generated in the combustion chamber to flow smoothly within the furnace gas circulation chamber 10, maximizing the contact area and contact time between the hot furnace gas and the outer wall of the pyrolysis tube in the heat treatment system, thereby improving heat energy utilization.

[0120] The front, rear, and right sides of the guide plate are fixedly connected to the front, rear, and right inner walls of the furnace gas circulation chamber, respectively (e.g., Figure 1 , 2 The components are respectively fixedly installed on the front, rear, and right inner walls of the furnace gas circulation chamber; the gap between the left side of the guide horizontal plate and the left side wall of the furnace gas circulation chamber forms a hot furnace gas outlet 30. The hot furnace gas generated in the combustion chamber flows from bottom to top into the heat treatment component through the hot furnace gas outlet, heating the garden greening waste in the heat treatment component for pyrolysis treatment.

[0121] The first and second vertical guide plates are rectangular flat plates, with a length equal to the longitudinal length of the furnace gas circulation chamber; their height is 1 / 5 to 4 / 5 of the combustion chamber height, preferably 1 / 3 to 1 / 2. The height of the first and second vertical guide plates is less than the height of the combustion chamber, but the sum of the heights of the first and second vertical guide plates is greater than the height of the combustion chamber. The first and second vertical guide plates are staggered. The thickness of the horizontal and vertical guide plates can be 2-15 cm, preferably 5-10 cm.

[0122] The heat treatment assembly includes at least one set of cylindrical pyrolysis tubes fixedly installed above the furnace gas circulation chamber and placed horizontally for containing garden waste. Each set of pyrolysis tubes includes two pyrolysis tubes stacked one above the other, namely upper and lower pyrolysis tubes 2 and 2A. The pyrolysis tubes are arranged along the transverse direction of the furnace gas circulation chamber, horizontally penetrating the left and right side walls of the furnace gas circulation chamber from left to right, and their two ends protrude beyond the left and right side walls of the furnace gas circulation chamber, respectively.

[0123] The lengths of the pyrolysis tubes protruding from the two side walls of the furnace gas circulation chamber are 50-90cm, preferably 60-70cm.

[0124] Gas product outlets 4 are respectively provided above the upper and lower pyrolysis pipes protruding from the right side of the furnace gas circulation chamber to discharge the pyrolysis gas generated by the pyrolysis of waste in the pyrolysis pipes; the gas product outlets are connected to the gas inlet 21 of the condensation system through pipes to introduce the pyrolysis gas into the condensation system for condensation treatment. The pyrolysis gas is condensed to obtain the liquid product (vinegar) and the non-condensable gas product (combustible gas) of the pyrolysis treatment.

[0125] A feed inlet 8 is provided above the upper pyrolysis pipe protruding from the left side of the furnace gas circulation chamber. The feed inlet is connected to the feed assembly 1 to introduce garden waste into the pyrolysis pipe. A discharge outlet 9 is provided below the lower pyrolysis pipe protruding from the left side of the furnace gas circulation chamber. The discharge outlet is connected to the discharge assembly 5 to discharge the solid products (pyrolysis carbon) generated by the pyrolysis of waste in the pyrolysis pipe.

[0126] A propulsion screw 3 is fixedly installed inside the pyrolysis tube. The propulsion screw is coaxial with the pyrolysis tube and is driven by a motor 3A to move the garden waste that enters the pyrolysis tube. The motor is located outside the furnace gas circulation chamber.

[0127] The propulsion screws inside the upper and lower pyrolysis tubes rotate in opposite directions. Garden waste is transferred from the upper pyrolysis tube to the lower pyrolysis tube, maximizing the distance the waste travels within the heat treatment chamber, increasing the heat treatment time, and ensuring complete pyrolysis. The solid products after pyrolysis are discharged from the outlet of the lower pyrolysis tube.

[0128] like Figure 1 A material transfer outlet 7 is opened below the upper pyrolysis pipe inside the furnace gas circulation chamber near the right side wall of the furnace gas circulation chamber; a material transfer inlet 28 is opened above the lower pyrolysis pipe, and the material transfer inlet and the material transfer outlet are connected through a material transfer pipe 6, so that the garden greening waste is transferred from the upper pyrolysis pipe to the lower pyrolysis pipe.

[0129] The material transfer outlet is located directly above the material transfer inlet, facilitating the transfer of waste from top to bottom. Both the upper and lower pyrolysis pipes are made of stainless steel.

[0130] A baffle 33 is horizontally installed between the upper and lower heat pipes. The baffle is horizontally fixed below the upper pyrolysis pipe and above the lower heat pipe, and the left side of the baffle is fixed to the left side wall of the furnace gas circulation chamber. The lateral length of the baffle is less than the lateral length of the furnace gas circulation chamber, and its longitudinal length is the same as the longitudinal length of the furnace gas circulation chamber.

[0131] The front, rear, and left sides of the baffle are fixedly connected to the front, rear, and left inner walls of the furnace gas circulation chamber, respectively (e.g., Figure 1 , 2 That is, they are respectively fixedly installed on the front, rear, and left inner walls of the furnace gas circulation chamber; and the lateral length of the baffle is less than the distance from the material transfer outlet / material transfer inlet to the left wall of the furnace gas circulation chamber.

[0132] When the heat treatment assembly is equipped with multiple pyrolysis tube groups, each pyrolysis tube group is parallel to each other and is placed horizontally along the transverse direction (from left to right) of the furnace gas circulation chamber, and arranged in parallel front and back along the longitudinal direction of the furnace gas circulation chamber.

[0133] This embodiment uses a horizontal placement from left to right as an example for illustration.

[0134] Garden waste to be pyrolyzed is fed by the feeding assembly 1 and enters the upper pyrolysis pipe 2 through the feed inlet 8. Under the action of the push screw 3, it moves from left to right and is heated by the furnace gas in the furnace gas circulation chamber for pyrolysis. The waste is then transported to the material transfer outlet 7 below the upper pyrolysis pipe, and through the material transfer pipe 6, it enters the lower pyrolysis pipe 2A through the material transfer inlet 28. Under the action of the push screw, it moves from right to left and is gradually transported to the discharge outlet 9 of the lower pyrolysis pipe. The solid phase product after pyrolysis is discharged from the heat device of the present invention through the discharge outlet. The pyrolysis gas generated by the pyrolysis of waste in the upper and lower pyrolysis pipes is discharged through the gas phase product outlet 4 on the upper right side of the pyrolysis pipe and transported to the condensation system through pipelines.

[0135] Under the action of the propulsion screw, the garden waste moves in an "S" shape inside the upper and lower pyrolysis tubes, maximizing the travel length of the garden waste and thus increasing the heat treatment time.

[0136] The purification system includes a purification component 16 and an induced draft fan 17. The purification component is connected to the induced draft fan via a pipe. The furnace gas discharged from the furnace gas outlet 15 at the top of the furnace gas circulation chamber 10 enters the purification component 16 for dust removal and purification under the action of the induced draft fan through the pipe. The purified furnace gas is then discharged into the atmosphere from the induced draft fan 17.

[0137] The purification components include a spray tower and an activated carbon box, and the furnace gas outlet is connected to the purification components via a pipeline.

[0138] The suction and driving action of the induced draft fan of the purification system causes fresh air to enter the combustion chamber 11 from the auxiliary air inlet 14, promoting the full combustion of fuel in the combustion chamber, generating heat, and forming a large amount of high-temperature furnace gas.

[0139] The hot furnace gas (i.e., high-temperature furnace gas) generated by combustion in the combustion chamber flows in an "S" shape (or wave shape) within the combustion chamber 11 under the action of the horizontal guide plate and the first and second vertical guide plates. It flows from bottom to top into the heat treatment component through the hot furnace gas outlet 30, heating the heat treatment component and the landscaping waste within it. The cold furnace gas (low-temperature furnace gas) after heat exchange is finally discharged from the furnace gas outlet 15 at the top of the furnace gas circulation chamber 10.

[0140] As the hot furnace gas flows through the furnace gas circulation chamber, it tightly wraps around the upper and lower pyrolysis tubes of the heat treatment system, transferring heat to the heat treatment system.

[0141] The purification system is a conventional purification device existing in the art, and existing known equipment for purifying furnace gas in the art is applicable to this invention.

[0142] The condensation system employs a water-based condensation method, comprising a condenser tube assembly and a circulating water tank 20 that provides condensate to the condenser tube assembly. The condenser tube assembly is placed vertically on the ground. Water from the circulating water tank flows into the condenser tube assembly through a conduit 31 from the inlet 24 and out of the condenser tube assembly from the outlet 23, thus condensing the pyrolysis gas entering the condenser tube assembly. The condensed liquid product (i.e., acetic acid) flows out from the acetic acid outlet 27 at the bottom of the condenser tube assembly and is collected. The uncondensed gas (i.e., gaseous product, combustible gas) flows out of the condenser tube assembly from the gas outlet 22 at the top of the condenser tube assembly and is connected to the gas return inlet of the furnace gas circulation chamber through a conduit, transporting the uncondensed combustible gas to the combustion chamber for combustion to provide heat energy.

[0143] The condensation system employs conventional gas-liquid condensation separation devices known in the art.

[0144] like Figure 1 The condenser assembly consists of a first condenser 18 and a second condenser 19 sleeved on the outside of it, wherein the first and second condensers are coaxial; the diameter of the second condenser is larger than the diameter of the first condenser, and condensed water flows into the interlayer between the first and second condensers to condense the gaseous products input into the first condenser.

[0145] A condenser baffle 34 is fixedly installed along the axial section of the first condenser tube, dividing the interior of the first condenser tube into two relatively independent condensing compartments along the axial section, and the length of the condenser baffle is less than the length of the first condenser tube;

[0146] The length of the first condenser tube is greater than that of the second condenser tube. An acetic acid outlet 27 is provided at the bottom of the first condenser tube. A gaseous product inlet 21 is provided at the top of the first condenser tube. The gaseous products generated by the pyrolysis of the heat treatment system are input into the condensation system through the gaseous product inlet. A gas outlet 22 is provided above the side wall of the first condenser tube. The gas outlet is located above the first condenser tube. After the pyrolysis gas from the waste pyrolysis is condensed, the non-condensable gas (i.e., the gaseous gas and gaseous products) is transported to the heat treatment system through a conduit from the gas outlet. After combustion, it forms hot furnace gas, which provides energy for subsequent heat treatment. The acetic acid product after the gaseous products are condensed is discharged from the acetic acid outlet at the bottom of the first condenser tube and collected.

[0147] The gaseous product inlet and the gas outlet are located at the top of the two condensing compartments of the first condenser tube, which are divided by a condensing baffle.

[0148] The upper part of the side wall of the second condenser tube is provided with a condensate outlet 23, and the lower part is provided with a condensate inlet 24. The condenser tube of the circulating water tank flows into the interlayer between the first and second condenser tubes from the inlet and flows out of the condenser assembly from the outlet, thereby realizing the condensation treatment of the gaseous products in the condenser assembly.

[0149] The pyrolysis gas generated from the pyrolysis of waste flows from the gaseous product inlet 21 into a condensing chamber of the first condensing tube of the condensing tube assembly of the condensing system. It flows from top to bottom and, after being condensed by the condensing water, the liquid phase product of the pyrolysis is condensed into liquid and flows out from the acetic acid outlet. The uncondensed gaseous product flows from the bottom of the condensing baffle to the second condensing chamber, that is, it bypasses the baffle from the bottom of the condensing baffle and enters the second condensing chamber to continue condensing. The combustible gas that cannot be condensed is discharged from the condensing assembly from the gas outlet 22.

[0150] A circulation pump 25 is installed on the conduit connecting the inlet of the circulating water tank and the condenser assembly. By adjusting the opening and closing of the circulation pump and its power, the flow rate of the water can be controlled, thereby adjusting the condensation effect.

[0151] like Figure 1 The garden greening waste heat treatment device of the present invention can also be placed or fixed as a whole on a load-bearing plate 32 with rollers 26 at the bottom or on a motor vehicle to realize the mobility function of the device of the present invention, that is, to transfer the device of the present invention to the place where heat treatment is required, and to realize the heat treatment of waste in situ.

[0152] The working principle of this utility model device is as follows:

[0153] like Figure 1 In the waste heat treatment apparatus of the present invention, the direction from left to right of the furnace gas circulation chamber is the transverse direction of the furnace gas circulation chamber, the direction from front to back is the longitudinal direction of the furnace gas circulation chamber, and the direction from top to bottom is the vertical direction of the furnace gas circulation chamber.

[0154] Figure 2 The solid arrows indicate the direction of movement of the raw material green waste within the heat treatment system during the operation of the device of this invention.

[0155] Figure 3 When the device of the present invention is working, the direction of movement of the furnace gas for heat treatment of waste in the heat treatment device, and the direction of flow of the gaseous products of pyrolysis treatment, wherein the direction of the solid arrow is the direction of flow of the gaseous medium in the device.

[0156] First, turn on the induced draft fan of the purification system and the auxiliary air inlet of the heat treatment system. Fresh air is drawn into the furnace gas circulation chamber of the heat treatment system, and gas flow is formed inside the furnace gas circulation chamber.

[0157] Arrange combustibles (garden greening waste is used in this invention) in the combustion chamber, ignite the combustibles, and continue igniting until the temperature of the combustion chamber reaches 500℃-600℃;

[0158] The waste to be pyrolyzed (using landscaping waste as an example) is fed into the feeding assembly 1 and enters the upper pyrolysis tube 2 of the heat treatment assembly through the inlet 8. Driven by the rotation of the push screw 3, it moves continuously from left to right within the upper pyrolysis tube, from the head to the tail. Through the material transfer outlet 7 below the tail of the upper pyrolysis tube, it enters the lower pyrolysis tube through the material transfer channel 6 and from the material transfer inlet 28 of the lower pyrolysis tube 2A. Driven by the rotation of the push screw 3, the material moves from right to left to the outlet 9 of the lower pyrolysis tube, and is then discharged from the heat treatment assembly through the discharge assembly 10. The push screws in the upper and lower pyrolysis tubes rotate in opposite directions. The entire movement path of the waste within the upper and lower pyrolysis tubes is S-shaped. During the movement, the hot furnace gas generated by the hot furnace gas supply assembly of the heat treatment system transfers its heat to the outer wall of the upper and lower pyrolysis tubes, and then to the landscaping waste within the upper and lower pyrolysis tubes.

[0159] Garden waste is heated and undergoes a pyrolysis reaction, i.e., heat treatment. The pyrolysis gas generated during the heat treatment process flows out from the gas phase product outlet 4 of each upper and lower pyrolysis tube and into the condensation system.

[0160] The pyrolysis gas flows out from the gas phase product outlet 4, along the pipeline, and flows into the first condenser tube 18 of the condensation system from the gas phase product inlet 21. It flows from top to bottom. During the flow, the condensable components in the gas phase product (such as water vapor and vinegar) condense to form liquid and are collected and stored at the bottom of the first condenser tube. The non-condensable gas flows out from the gas outlet 22 from the first condenser tube, along the pipeline, and enters the combustion chamber 11 of the hot furnace gas supply component of the heat treatment system from the gas return inlet 13. After combustion, it forms hot furnace gas, which provides energy for subsequent heat treatment.

[0161] Under the action of the induced draft fan 17, the hot furnace gas generated in the combustion chamber of the hot furnace gas supply component flows. Under the action of the guide horizontal plate 12 and the first and second guide vertical plates 121 and 121A, the hot furnace gas generated in the combustion chamber flows in a wave shape, and then enters the heat treatment chamber of the furnace gas circulation chamber from the hot furnace gas outlet 30 to heat the heat treatment component and pyrolyze the waste in the upper and lower pyrolysis tubes of the heat treatment component. After heating the heat treatment component and transferring heat, the hot furnace gas flows out of the furnace gas circulation chamber from the furnace gas outlet at the top of the furnace gas circulation chamber, enters the purification component 16 of the purification system through the pipeline, and is discharged by the induced draft fan after dust removal and purification.

[0162] In the heat treatment device of the present invention, the movement direction of the garden waste is opposite to the flow direction of the hot furnace gas, thereby maximizing the contact area and contact time between the garden waste and the hot gas (this contact is not direct contact, but is separated by the pipe wall), thereby achieving full heat treatment of the garden waste and achieving the goal of heat treatment.

[0163] The above embodiments of this utility model are merely exemplary and do not constitute any limitation on the scope of this utility model. Those skilled in the art should understand that modifications or substitutions to the details and form of the technical solution of this utility model can be made without departing from the spirit and scope of this utility model, but all such modifications and substitutions fall within the protection scope of this utility model.

Claims

1. A heat treatment device for landscaping waste, characterized in that, It includes a heat treatment system, a condensation system, and a purification system. The heat treatment system is connected to the condensation system and the purification system via pipelines, wherein: The heat treatment system pyrolyzes the waste. The condensation system condenses the high-temperature pyrolysis gas generated by the heat treatment system. The condensed liquid in the high-temperature pyrolysis gas forms liquid phase products, and the gas that cannot be condensed forms gas phase products. These products are then returned to the heat treatment system and, after combustion, form high-temperature hot furnace gas to heat the heat treatment system. The purification system purifies the furnace gas that is supplied to the heat treatment system through pipelines, and the purified furnace gas is then discharged into the air.

2. The heat treatment apparatus as described in claim 1, characterized in that, The heat treatment system includes an internally hollow furnace gas circulation chamber, and relatively independent heat treatment components and hot furnace gas supply components arranged vertically within the furnace gas circulation chamber. The heat treatment components are positioned above the hot furnace gas supply components. Hot furnace gas from the hot furnace gas supply components enters the heat treatment components from below through the hot furnace gas outlet, heating and pyrolyzing the heat treatment components and the materials to be pyrolyzed within them. Alternatively, the heat treatment system includes an internally hollow furnace gas circulation chamber, and a hot furnace gas supply components located outside the furnace gas circulation chamber, as well as a heat treatment component within the furnace gas circulation chamber. Hot furnace gas from the hot furnace gas supply components enters the heat treatment components from the side wall of the furnace gas circulation chamber through the hot furnace gas outlet, heating and pyrolyzing the heat treatment components and the materials to be pyrolyzed within them.

3. The heat treatment apparatus as described in claim 2, characterized in that, The heat treatment assembly includes: At least one set of cylindrical pyrolysis tubes fixedly installed above the furnace gas circulation chamber and placed horizontally to contain garden waste. Each set of pyrolysis tubes includes two pyrolysis tubes stacked one above the other, namely upper and lower pyrolysis tubes. The pyrolysis tubes are arranged along the transverse direction of the furnace gas circulation chamber, horizontally penetrating the left and right side walls of the furnace gas circulation chamber from left to right or horizontally penetrating the front and rear side walls of the furnace gas circulation chamber from front to back, and their two ends protrude outside the left and right or front and rear side walls of the furnace gas circulation chamber, respectively. Gas product outlets are provided above the upper and lower pyrolysis pipes protruding from one side wall of the furnace gas circulation chamber to discharge the high-temperature pyrolysis gas generated by the pyrolysis of waste in the pyrolysis pipes; a feed inlet is provided above the upper pyrolysis pipe protruding from the other side wall of the furnace gas circulation chamber to guide landscaping waste into the pyrolysis pipes; and a discharge outlet is provided below the lower pyrolysis pipe protruding from the other side wall of the furnace gas circulation chamber to discharge the solid products generated by the pyrolysis of waste in the pyrolysis pipes. Inside the furnace gas circulation chamber, a material transfer outlet is set below the upper pyrolysis pipe near the gas phase product outlet, and a material transfer inlet is set above the lower pyrolysis pipe. The material transfer inlet and material transfer outlet are connected by a material transfer pipe, so that landscaping waste is transferred from the upper pyrolysis pipe to the lower pyrolysis pipe.

4. The heat treatment apparatus as described in claim 2, characterized in that, The upper and lower pyrolysis tubes are respectively fixedly installed with push screws. The push screws are coaxial with the pyrolysis tubes and are driven by motors to push the waste entering the pyrolysis tubes to move within the pyrolysis tubes. The motors are located outside the furnace gas circulation chamber.

5. The heat treatment apparatus as described in claim 2, characterized in that, The hot furnace gas supply assembly includes a combustion chamber, a horizontal guide plate, first and second vertical guide plates, and a gas recirculation inlet and several auxiliary air inlets are provided on the side wall of the combustion chamber. A hot furnace gas outlet is provided on the side wall of the combustion chamber away from the gas recirculation inlet. The combustion chamber is located below the furnace gas circulation chamber; A horizontal guide plate covers the combustion chamber. The lateral length of the horizontal guide plate is less than the lateral length of the furnace gas circulation chamber, and the gap between the horizontal guide plate and the side wall of the furnace gas circulation chamber forms the hot furnace gas outlet. The longitudinal length of the horizontal guide plate is the same as the longitudinal length of the furnace gas circulation chamber. The first vertical guide plate is fixed at the bottom of the furnace gas circulation chamber and placed vertically; the second vertical guide plate is fixed below the horizontal guide plate and placed vertically; the first and second vertical guide plates are placed along the longitudinal direction of the furnace gas circulation chamber, and their length is the same as the longitudinal length of the furnace gas circulation chamber.

6. The heat treatment apparatus as described in claim 5, characterized in that, The horizontal guide plate is positioned above the auxiliary air inlet and the gas reburning inlet; the height of the first and second vertical guide plates is less than the height of the combustion chamber, and the first and second vertical guide plates are arranged alternately.

7. The heat treatment apparatus as described in claim 5, characterized in that, The guide plate covers the combustion chamber and divides the furnace gas circulation chamber into two relatively independent upper and lower parts, which respectively accommodate the heat treatment component and the hot furnace gas supply component. The part that accommodates the heat treatment component is the heat treatment chamber, and the part that accommodates the hot furnace gas supply component is the hot furnace gas supply chamber.

8. The heat treatment apparatus as described in claim 5, characterized in that, The ratio of the lateral length of the guide plate to the lateral length of the furnace gas circulation chamber is 0.75-0.95:

1.

9. The heat treatment apparatus as described in claim 5, characterized in that, The ratio of the lateral length of the guide plate to the lateral length of the furnace gas circulation chamber is 0.8-0.85:

1.

10. The heat treatment apparatus as claimed in claim 1, characterized in that, The purification system includes a purification component and an induced draft fan. The purification component is connected to the induced draft fan via a pipeline. The furnace gas discharged from the furnace gas outlet at the top of the heat treatment system enters the purification component for dust removal and purification under the action of the induced draft fan through the pipeline. The purified furnace gas is then discharged into the atmosphere from the induced draft fan.

11. The heat treatment apparatus as claimed in claim 1, characterized in that, The condensation system includes a condenser tube assembly and a circulating water tank that provides condensate to the condenser tube assembly. The condenser tube assembly is placed vertically, and the circulating water tank is connected to the inlet and outlet of the condenser tube assembly via conduits. Water in the circulating water tank flows into and out of the condenser tube assembly, thereby condensing the high-temperature pyrolysis gas entering the condenser tube assembly. The condensed liquid phase product flows out from the acetic acid outlet located at the bottom of the condenser tube assembly. The uncondensed gaseous product, i.e., the combustible gas, flows out from the combustible gas outlet at the top of the condenser tube assembly and is connected to the combustible gas recirculation inlet of the furnace gas circulation chamber via a conduit, thus transporting the uncondensed gaseous product to the combustion chamber for combustion and providing heat energy.

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