A high-efficiency reforming reaction device for waste plastic pyrolysis
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BEIJING ZHONGCHUANG CARBON RENEWABLE RESOURCES TECH DEV CO LTD
- Filing Date
- 2025-06-17
- Publication Date
- 2026-08-07
AI Technical Summary
[0008]上述问题导致间歇投料的生产效率远低于连续投料
[0026]1. By installing a slag discharge device, continuous feeding and production can be achieved in the reactor;
Smart Images
Figure CN224604905U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of waste plastic pyrolysis oil production technology, specifically a waste plastic pyrolysis high-efficiency reforming reaction device. Background Technology
[0002] Waste plastics manufactured from petroleum have low recyclability and are mostly disposed of as waste. These forms of waste decompose naturally, but the long decomposition process pollutes the soil and causes serious environmental pollution. One method of recycling waste plastics is to pyrolyze them and convert them into usable oil, known as waste plastic pyrolysis oil.
[0003] Because different types of plastics have different optimal oil extraction temperatures, in scenarios where mixed waste plastics are used as raw materials for pyrolysis oil production, the varying proportions of different types of plastics in the raw materials make it impossible to precisely control the temperature and reaction time. Typically, the reaction time can only be set based on experience. Therefore, traditional pyrolysis oil production units all employ intermittent feeding.
[0004] The following problems exist with existing technology:
[0005] Deoxygenation of the reactor is required before each feeding.
[0006] The reaction rate decreases in the later stages of each feeding process, resulting in a reduction in overall production efficiency.
[0007] After each feeding reaction, the reactor must be cooled to a safe temperature before slag can be discharged to prevent the high-temperature carbon slag from coming into contact with air and burning.
[0008] The aforementioned problems result in a production efficiency that is far lower for intermittent feeding than for continuous feeding.
[0009] Based on the above problems, the technical solution of this application is formulated in order to obtain the optimal economic value. Utility Model Content
[0010] The technical problem to be solved by this utility model is to provide a reaction device that can control the temperature in stages when using mixed waste plastics as raw materials, thus solving the problems existing in the prior art.
[0011] One of the purposes of this invention is to achieve continuous feeding and improve production efficiency.
[0012] This utility model discloses a high-efficiency reforming reactor for waste plastic pyrolysis, including a preheater, a reactor, a slag discharge device, and a reforming device; the outlet of the preheater is connected to the inlet of the reactor;
[0013] The reactor solid phase outlet is located at the bottom side wall of the reactor; the reactor outlet is connected to the inlet of the slag discharge device through an intermittently opening discharge valve;
[0014] The gas phase outlet of the reactor is connected to the inlet of the reforming unit, and the liquid phase at the bottom of the reforming unit is refluxed to the reactor; the gas phase outlet at the top of the reforming unit discharges the gas phase to the subsequent process section.
[0015] The slag discharge device includes a slag discharge vessel, a gas flow meter, a slag discharge valve, and a cooling device;
[0016] The cooling device is used to cool the slag discharge vessel; a gas flow meter is installed at the gas outlet at the top of the slag discharge vessel, and an intermittently opening slag discharge valve is installed at the bottom of the slag discharge vessel; the cooling device is activated when the gas flow meter velocity is lower than a preset value, and the slag discharge valve is activated when the temperature of the slag discharge vessel drops to a preset value.
[0017] Furthermore, the slag discharge vessel is equipped with a stirring device.
[0018] Preferably, the cooling device employs a jacketed cooling system.
[0019] Furthermore, the bottom of the reactor has a convex shape that is low around the edges and high in the middle, which facilitates the discharge of solid slag.
[0020] Furthermore, the bottom of the slag discharge vessel has a convex shape that is low around the edges and high in the middle, which facilitates the discharge of solid slag.
[0021] Furthermore, the unloading valve and the slag discharge valve are interlocked and cannot be opened simultaneously.
[0022] Furthermore, the gas outlet at the top of the slag discharge vessel is connected to the reforming unit.
[0023] The operation process of this utility model is as follows:
[0024] Solid mixed waste plastics are preheated and melted in a preheating device. After entering the reactor, they are directly decomposed into a gas phase and carbon residue. The gas phase is discharged and cooled in a recombination device before recombination stops, forming oil (gas phase) and heavy components (liquid phase). The oil is discharged to a subsequent stage for cooling to form products, while the heavy components are returned to the reactor for further decomposition. Unreacted raw materials and carbon residue mixture in the reactor are intermittently discharged into a slag discharge vessel. After discharge, the discharge valve is closed. In the slag discharge vessel, unreacted plastics continue to react until fully decomposed (monitored by a gas flow meter). After complete decomposition, the temperature is cooled to a safe temperature, and the slag discharge valve is opened to discharge the carbon residue. After the slag discharge vessel is emptied, it waits for the next opening of the discharge valve to repeat the above process.
[0025] The beneficial effects of this utility model are as follows:
[0026] 1. By installing a slag discharge device, continuous feeding and production can be achieved in the reactor;
[0027] 2. Monitor the decomposition of plastics in the slag discharge device by installing a gas flow meter;
[0028] 3. By installing a cooling device, the carbon slag is cooled to ensure safety. Attached Figure Description
[0029] Figure 1 Equipment structure diagram;
[0030] Figure 2 Structural diagram of the slag discharge device. Detailed Implementation
[0031] The specific implementation of this utility model will be further described below with reference to the embodiments. The following embodiments are only used to more clearly illustrate the technical embodiments of this utility model, and should not be used to limit the protection scope of this utility model.
[0032] Example 1
[0033] This utility model discloses a high-efficiency reforming reactor for pyrolysis of waste plastics, including a preheater 1, a reactor 2, a slag discharge device 3, and a reforming device 4; the outlet of the preheater 1 is connected to the inlet of the reactor 2;
[0034] The solid phase outlet of reactor 2 is located at the bottom side wall of reactor 2; the outlet of reactor 2 is connected to the inlet of the slag discharge device 3 through an intermittently opening discharge valve 32.
[0035] The gas phase outlet of reactor 2 is connected to the inlet of reforming unit 4, and the liquid phase at the bottom of reforming unit 4 is refluxed to reactor 2; the gas phase outlet at the top of reforming unit 4 discharges the gas phase to the subsequent process section.
[0036] The slag discharge device 3 includes a slag discharge vessel 31, a gas flow meter 34, a slag discharge valve 35, and a cooling device 33;
[0037] The cooling device 33 is used to cool the slag discharge vessel 31; a gas flow meter 34 is provided at the gas outlet at the top of the slag discharge vessel 31, and an intermittently opening slag discharge valve 35 is provided at the bottom of the slag discharge vessel 31; the cooling device 33 is turned on when the flow rate of the gas flow meter 34 is lower than the preset value, and the slag discharge valve 35 is turned on when the temperature of the slag discharge vessel 31 drops to the preset value.
[0038] In this embodiment, the slag discharge vessel 31 is equipped with a stirring device 36.
[0039] In this embodiment, the cooling device 33 employs jacketed cooling.
[0040] In this embodiment, the bottom of the reactor 2 is a convex shape with a low perimeter and a high center, which facilitates the discharge of solid slag.
[0041] In this embodiment, the bottom of the slag discharge vessel 31 is a convex shape with a low perimeter and a high center, which facilitates the discharge of solid slag.
[0042] In this embodiment, the unloading valve 32 and the slag discharge valve 35 are interlocked and cannot be opened simultaneously.
[0043] In this embodiment, the gas outlet at the top of the slag discharge vessel is connected to the reforming device 4.
[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.
Claims
1. A high-efficiency reforming reactor for waste plastic pyrolysis, characterized in that, It includes a preheater (1), a reactor (2), a slag discharge device (3), and a reforming device (4); the outlet of the preheater (1) is connected to the inlet of the reactor (2); The solid phase outlet of the reactor (2) is located at the bottom side wall of the reactor (2); the outlet of the reactor (2) is connected to the inlet of the slag discharge device (3) through an intermittently opened discharge valve (32); The gas phase outlet of the reactor (2) is connected to the inlet of the reforming unit (4), and the liquid phase at the bottom of the reforming unit (4) is returned to the reactor (2); the gas phase outlet at the top of the reforming unit (4) discharges the gas phase to the subsequent process section; The slag discharge device (3) includes a slag discharge vessel (31), a gas flow meter (34), a slag discharge valve (35), and a cooling device (33); The cooling device (33) is used to cool the slag discharge vessel (31); a gas flow meter (34) is provided at the gas outlet at the top of the slag discharge vessel (31), and an intermittently opening slag discharge valve (35) is provided at the bottom of the slag discharge vessel (31); the cooling device (33) is turned on when the flow rate of the gas flow meter (34) is lower than the preset value, and the slag discharge valve (35) is turned on when the temperature of the slag discharge vessel (31) drops to the preset value.
2. The waste plastic pyrolysis high-efficiency reforming reactor according to claim 1, characterized in that, The slag discharge vessel (31) is equipped with a stirring device (36).
3. The waste plastic pyrolysis high-efficiency reforming reactor according to claim 1, characterized in that, The cooling device (33) uses a jacket cooling system.
4. The waste plastic pyrolysis high-efficiency reforming reactor according to claim 1, characterized in that, The bottom of the reactor (2) is a convex shape with a low perimeter and a high center, which facilitates the discharge of solid slag.
5. The waste plastic pyrolysis high-efficiency reforming reactor according to claim 1, characterized in that, The bottom of the slag discharge vessel (31) is a convex shape with a low perimeter and a high center, which facilitates the discharge of solid slag.
6. The high-efficiency reforming reactor for waste plastic pyrolysis according to claim 1, characterized in that, The bottom of the slag discharge vessel (31) is a convex shape with a low perimeter and a high center, which facilitates the discharge of solid slag.
7. The waste plastic pyrolysis high-efficiency reforming reactor according to claim 1, characterized in that, The unloading valve (32) and the slag discharge valve (35) are interlocked and cannot be opened at the same time.
8. The waste plastic pyrolysis high-efficiency reforming reactor according to claim 1, characterized in that, The gas outlet at the top of the slag discharge vessel is connected to the reforming device (4).