Horizontal high-bromine-content material incineration pretreatment reaction device

Abstract

The utility model discloses a horizontal high-bromine-content material incineration pretreatment reaction device, relates to the technical field of waste treatment, and solves the problem that a reaction device in the prior art is not suitable for continuous production due to troublesome feeding and discharging processes in a solid-liquid mixed state. The reaction kettle comprises a kettle body, a central pipe shaft is transversely and rotatably arranged in the kettle body, stirring blades are arranged on the central pipe shaft, the central pipe shaft is in transmission connection with a driving mechanism arranged on the kettle body, a liquid nozzle is arranged on the central pipe shaft, the central pipe shaft is communicated with a liquid supply unit, and the liquid supply unit is connected with a recovery unit at the bottom of the kettle body; a feeding and discharging system is arranged on the kettle body, and the kettle body is connected with the pressure control unit and the temperature control unit. The liquid supply unit and the recovery unit are arranged on the kettle body, so that liquid-solid separation can be quickly realized, the liquid is collected and gathered, and the feeding and discharging system is arranged to facilitate feeding and discharging of waste particles, accelerate the discharging speed and improve the continuous production efficiency. The device is convenient to use, high in processing reaction efficiency and suitable for continuous production.

Description

Technical Field

[0001] The utility model relates to the technical field of waste treatment, in particular to a horizontal high-bromine-containing material incineration pretreatment reaction device. Background Art

[0002] When disposing of or recycling waste bromine-containing plastics, debromination pretreatment must be carried out. Otherwise, the presence of high-bromine materials during incineration will easily produce highly toxic polybrominated dibenzodioxins and biphenyl furans or cause secondary pollution of soil and groundwater by brominated flame retardants. Supercritical fluids have broad application prospects in the decomposition of toxic organic matter due to their unique physical and chemical properties and particularly high reactivity. Supercritical fluids can decompose plastic waste to produce high-value-added oils and remove bromine from plastic waste, so they have received widespread attention.

[0003] The supercritical fluids currently used for debromination of bromine-containing plastics mainly include water and organic solvents (such as methanol, ethanol, acetone, isopropanol). The debromination efficiency of supercritical organic solvents is low. Compared with the use of organic solvents, the use of supercritical water for debromination of bromine-containing plastics can achieve a higher debromination efficiency, and water is used as a reaction solvent, which is more environmentally friendly. However, there are two main disadvantages of supercritical water technology for debromination of bromine-containing plastics: 1: The reaction conditions are harsh, the temperature reaches 374°C, the pressure reaches 22MPa, the energy consumption is large, and the actual control requirements are high. 2: The reaction process produces acidic substances, which seriously corrode the reaction equipment under high temperature and high pressure conditions, and the equipment material requirements are very high, resulting in expensive equipment costs. In fact, these two shortcomings of supercritical water debromination technology also greatly limit its application in the harmless treatment of bromine-containing plastic waste.

[0004] A Chinese invention patent with publication number CN104722555A discloses a method for harmlessly debrominating bromine-containing plastic waste, which utilizes supercritical fluid for debromination. The main process is to add ammonia water with a concentration of 10%-50% to a high-temperature and high-pressure reactor to debrominate the granular plastic waste. However, it is not convenient to load and unload materials in a conventional high-temperature and high-pressure reactor, especially when liquid and solid are mixed. Loading and unloading materials will delay a lot of time, and it is not suitable for continuous production and processing. Utility Model Content

[0005] In view of the deficiencies in the above-mentioned background technology, the utility model proposes a horizontal high-bromine material incineration pretreatment reaction device, which solves the problem that the reaction device in the prior art has a complicated material loading and unloading process in a solid-liquid mixed state, resulting in unsuitability for continuous production.

[0006] The technical solution of the utility model is achieved as follows: a horizontal high-bromine material incineration pretreatment reaction device comprises a kettle body, a central tube shaft is arranged in the kettle body for horizontal rotation, and a stirring blade is arranged on the central tube shaft, the central tube shaft is transmission-connected with a driving mechanism arranged on the kettle body, and a liquid nozzle is arranged on the central tube shaft, and the central tube shaft is communicated with a liquid supply unit, and the liquid supply unit is connected with a recovery unit at the bottom of the kettle body; the kettle body is provided with a material inlet and outlet system, and the kettle body is connected with a pressure control unit and a temperature control unit.

[0007] Preferably, the feeding and discharging system comprises a feeding port arranged at the top of the kettle body and a discharging port arranged at the bottom of the kettle body, and both the feeding port and the discharging port are provided with end covers.

[0008] Preferably, the end cover comprises a cover plate hinged on the feed port or the discharge port, the cover plate is provided with a cantilever, and the cantilever is hingedly connected to a hydraulic push rod hinged on the kettle body.

[0009] Preferably, the driving mechanism comprises a driving motor fixedly mounted on the side wall of the kettle body, and the output end of the driving motor is drivingly connected to the central tube shaft.

[0010] Preferably, the stirring blade is an arc-shaped blade, the stirring blade is fixed on the central tube shaft at equal intervals in the circumferential direction, and grid holes are provided on the stirring blade.

[0011] Preferably, the liquid supply unit includes a rotating joint connected to the central pipe axis, the rotating joint is connected to the liquid supply pipeline and connected to the liquid storage tank through the liquid supply pipeline, the liquid storage tank is connected to the recovery unit through the recovery pipeline, and liquid pumps are provided on the liquid supply pipeline and the recovery pipeline.

[0012] Preferably, the recovery unit comprises a groove portion arranged at the lower part of the kettle body, a filter screen is arranged on the groove portion, and the bottom of the groove portion is connected to one end of the recovery pipeline.

[0013] Preferably, the pressure control unit comprises an air pressure pump, which is connected to an air inlet pipe arranged on the top of the kettle body through a pipeline, and a pressure gauge is arranged on the kettle body.

[0014] Preferably, the temperature control unit comprises a heating belt wound around the side wall of the kettle body, and the outer side of the heating belt is wrapped with a heat-insulating layer.

[0015] Preferably, a waste gas discharge pipe is provided on the top of the kettle body, and a solenoid valve is provided on the waste gas discharge pipe.

[0016] The beneficial effects of the utility model are as follows: by arranging a liquid supply unit and a recovery unit on the kettle body, liquid-solid separation can be achieved quickly, and the liquid can be collected and gathered; by arranging a feeding and discharging system, it is convenient to feed and discharge waste particles, accelerate the discharging speed, and improve the continuous production efficiency. By arranging a central tube shaft connected to the liquid supply unit, supercritical fluid can be sprayed onto the waste particles in the kettle body through the liquid nozzle, and the mixing is more uniform; at the same time, by arranging a driving mechanism connected to the central tube shaft, the central tube shaft can be driven to rotate, and then the stirring blades thereon are used to stir and mix the waste particles in the kettle body, so that the reaction is more uniform. Further, by arranging a temperature control unit and a pressure control unit, the temperature and air pressure inside the kettle body can be adjusted and maintained within a specified range. The device is easy to use, has high processing reaction efficiency, and is suitable for continuous production. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the longitudinal section structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the transverse cross-sectional structure of the utility model;

[0020] In the figure: 1: kettle body, 2: central tube axis, 3: stirring blade, 4: driving mechanism, 5: liquid nozzle, 6: liquid supply unit, 7: recovery unit, 81: feed port, 82: discharge port, 83: cover plate, 84: cantilever, 85: hydraulic push rod, 41: driving motor, 61: rotary joint, 62: liquid supply pipeline, 63: liquid storage tank, 64: recovery pipeline, 65: liquid pump, 71: groove part, 72: filter screen, 100: air pressure pump, 101: air intake pipe, 102: air pressure gauge, 91: exhaust gas discharge pipe, 92: solenoid valve. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] like Figure 1 , 2As shown, in Example 1, a horizontal high-bromine material incineration pretreatment reaction device includes a kettle body 1, a central tube shaft 2 is provided in the kettle body 1 for horizontal rotation, and a stirring blade 3 is provided on the central tube shaft 2, and the central tube shaft 2 is connected to the driving mechanism 4 provided on the kettle body 1, and the driving mechanism can drive the central tube shaft to rotate, and the stirring blades thereon are used to stir and mix the waste particles in the kettle body, so that the mixing reaction is more uniform. A liquid nozzle 5 is provided on the central tube shaft 2, and the central tube shaft 2 is connected to the liquid supply unit 6. By setting the central tube shaft connected to the liquid supply unit, a supercritical fluid can be sprayed onto the waste particles in the kettle body through the liquid nozzle, and the mixing is more uniform. The liquid supply unit 6 is connected to the recovery unit 7 at the bottom of the kettle body 1. By setting the liquid supply unit and the recovery unit on the kettle body, liquid and solid separation can be quickly achieved, and the liquid can be collected and gathered. By setting the feeding and discharging system, it is convenient for the feeding and discharging of waste particles, accelerating the discharging speed, and improving the continuous production efficiency. The kettle body 1 is provided with a material inlet and outlet system, and the kettle body 1 is connected with a pressure control unit and a temperature control unit. The temperature control unit and the pressure control unit can adjust and maintain the temperature and air pressure inside the kettle body within a specified range, which is conducive to the reaction.

[0023] As a further embodiment, the driving mechanism 4 includes a driving motor 41 fixedly arranged on the side wall of the kettle body 1, and the output end of the driving motor 41 is connected to the central tube shaft 2. In this embodiment, the output end of the driving motor is connected to the central tube shaft 2 through a gear pair, and the stirring blade 3 is an arc-shaped blade. The stirring blade 3 is fixedly arranged on the central tube shaft 2 at equal intervals in the circumferential direction, and the stirring blade 3 is provided with a grid hole, and the grid hole is provided to facilitate the passage of liquid during stirring. When the driving motor is working, it can drive the central tube shaft to rotate, and synchronously drive the stirring blade on the central tube shaft to stir the reaction raw materials inside the kettle body.

[0024] When this embodiment is used, waste particles with high bromine content enter the interior of the kettle through the feeding and discharging system, and then the liquid supply unit sprays supercritical fluid into the kettle through the liquid nozzle, and the driving motor is turned on to stir the waste particles and spray them evenly to form a solid-liquid mixed material, and the temperature control unit and the pressure control unit are controlled to maintain the pressure and temperature inside the kettle, and the reaction is stopped after the set time, and the liquid in the solid-liquid mixed material is recovered to the liquid supply unit through the recovery unit to separate the solid and liquid, and finally the reacted fertilizer particles are discharged through the feeding and discharging system. This device is easy to use, has high processing reaction efficiency, and is suitable for continuous production.

[0025] Embodiment 2, a horizontal high-bromine-containing material incineration pretreatment reaction device, based on embodiment 1, the feed and discharge system includes a feed port 81 arranged at the top of the kettle body 1 and a discharge port 82 arranged at the bottom of the kettle body 1, and both the feed port 81 and the discharge port 82 are provided with end covers. Specifically, in this embodiment, the end cover includes a cover plate 83 hinged on the feed port 81 or the discharge port 82, and a cantilever 84 is provided on the cover plate 83, and the cantilever 84 is hingedly connected to a hydraulic push rod 85 hingedly arranged on the kettle body 1.

[0026] When the feed port or the discharge port needs to be opened, the hydraulic push rod contracts, driving the cover plate to rotate relative to the hinged position, thereby opening the feed port or the discharge port. As a further embodiment, a sealing ring or a conventional sealing structure is provided on the cover plate to improve the sealing performance.

[0027] Embodiment 3, a horizontal high-bromine material incineration pretreatment reaction device, based on embodiment 2, the liquid supply unit 6 includes a rotary joint 61 connected to the central pipe shaft 2, the rotary joint 61 is connected to the liquid supply pipeline 62 and connected to the liquid storage tank 63 through the liquid supply pipeline 62, and the rotary joint is set to be able to drive the central pipe shaft to rotate while satisfying the liquid entering the central pipe shaft. The liquid storage tank 63 is connected to the recovery unit 7 through the recovery pipeline 64, and the liquid supply pipeline 62 and the recovery pipeline 64 are both provided with a liquid pump 65. After the high-bromine waste particles are put into the kettle, the liquid pump on the liquid supply pipeline is turned on, the supercritical fluid in the liquid storage tank is extracted and pumped into the central pipe shaft through the liquid supply pipeline and the rotary joint and sprayed out.

[0028] In addition, in this embodiment, the recovery unit 7 includes a groove portion 71 provided at the lower part of the kettle body 1, a filter screen 72 is provided on the groove portion 71, and the bottom of the groove portion 71 is connected to one end of the recovery pipe 64. When the reaction is completed and the material is discharged, the liquid pump on the recovery pipe is turned on, and the liquid pump extracts the liquid in the groove portion into the liquid storage tank. The filter screen is provided to filter the waste particles until all the liquid in the kettle body passes through the groove portion and enters the liquid storage tank. As an optional embodiment, two liquid storage tanks are provided, which are respectively connected to the liquid supply pipe and the recovery pipe, one for storing the supercritical fluid waste liquid that has been reacted and cannot be reused, and the other for storing fresh supercritical fluid.

[0029] Embodiment 4, a horizontal high-bromine material incineration pretreatment reaction device, based on embodiment 3, the pressure control unit includes an air pressure pump 100, the air pressure pump 100 is connected to the air inlet pipe 101 arranged at the top of the kettle body 1 through a pipeline, and the kettle body 1 is provided with a barometer 102. The air pressure pump is provided to maintain the air pressure inside the kettle body in a set range, so that the reaction of the supercritical fluid and the high-bromine waste particles is maintained in a high-efficiency range. The temperature control unit includes a heating belt wrapped around the side wall of the kettle body 1, and the outer side of the heating belt is wrapped with an insulation layer. By providing a heating belt, the temperature inside the kettle body can be controlled so that the supercritical fluid and the high-bromine waste particles react at a suitable temperature. As a further implementation scheme, in this embodiment, a conventional temperature sensor is provided inside the kettle body, and the temperature sensor feeds back the temperature inside the kettle body to the control board. The control board controls the output power change of the heating belt to make the temperature reach the set reaction temperature, and the insulation layer can play a role in heat preservation and reduce heat loss.

[0030] As a further optional embodiment, a waste gas discharge pipe 91 is provided on the top of the kettle body 1, and a solenoid valve 92 is provided on the waste gas discharge pipe 91. The solenoid valve can control the opening and closing of the waste gas discharge pipe, and discharge the internal waste gas after the reaction is completed, reducing the internal pressure for discharge. As a further optional embodiment, the waste gas discharge pipe is connected to a conventional waste gas incinerator or a waste gas recovery device to treat the discharged waste gas to avoid direct discharge and pollution.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A horizontal high-bromine-containing material incineration pretreatment reaction device, comprising a kettle (1), characterized in that: A central tube shaft (2) is provided in the kettle body (1) for horizontal rotation, and a stirring blade (3) is provided on the central tube shaft (2), the central tube shaft (2) is drivingly connected to a driving mechanism (4) provided on the kettle body (1), and a liquid nozzle (5) is provided on the central tube shaft (2), and the central tube shaft (2) is connected to a liquid supply unit (6), and the liquid supply unit (6) is connected to a recovery unit (7) at the bottom of the kettle body (1); the kettle body (1) is provided with a material inlet and outlet system, and the kettle body (1) is connected to a pressure control unit and a temperature control unit.

2. The horizontal high-bromine-containing material incineration pretreatment reaction device according to claim 1 is characterized in that: The material inlet and outlet system comprises a material inlet (81) arranged at the top of the kettle body (1) and a material outlet (82) arranged at the bottom of the kettle body (1), and both the material inlet (81) and the material outlet (82) are provided with end covers.

3. The horizontal high-bromine-containing material incineration pretreatment reaction device according to claim 2 is characterized in that: The end cover comprises a cover plate (83) hingedly connected to the feed port (81) or the discharge port (82), a cantilever (84) being provided on the cover plate (83), and the cantilever (84) being hingedly connected to a hydraulic push rod (85) hingedly provided on the kettle body (1).

4. The horizontal high-bromine-containing material incineration pretreatment reaction device according to any one of claims 1 to 3, characterized in that: The driving mechanism (4) comprises a driving motor (41) fixedly mounted on the side wall of the kettle body (1), and an output end of the driving motor (41) is drivingly connected to the central tube shaft (2).

5. The horizontal high-bromine-containing material incineration pretreatment reaction device according to claim 4 is characterized in that: The stirring blade (3) is an arc-shaped blade, and the stirring blade (3) is fixedly arranged on the central tube shaft (2) at equal intervals in the circumferential direction, and grid holes are provided on the stirring blade (3).

6. The horizontal high-bromine-containing material incineration pretreatment reaction device according to claim 5 is characterized in that: The liquid supply unit (6) comprises a rotary joint (61) connected to the central tube axis (2); the rotary joint (61) is connected to a liquid supply pipeline (62) and is connected to a liquid storage tank (63) via the liquid supply pipeline (62); the liquid storage tank (63) is connected to the recovery unit (7) via a recovery pipeline (64); and a liquid pump (65) is provided on both the liquid supply pipeline (62) and the recovery pipeline (64).

7. The horizontal high-bromine-containing material incineration pretreatment reaction device according to claim 6 is characterized in that: The recovery unit (7) comprises a groove portion (71) provided at the lower part of the kettle body (1), a filter screen (72) being provided on the groove portion (71), and the bottom of the groove portion (71) being connected to one end of the recovery pipe (64).

8. The horizontal high-bromine-containing material incineration pretreatment reaction device according to claim 1 or 7, characterized in that: The pressure control unit comprises an air pressure pump (100), the air pressure pump (100) being connected to an air inlet pipe (101) arranged at the top of the kettle body (1) through a pipeline, and an air pressure gauge (102) is arranged on the kettle body (1).

9. The horizontal high-bromine-containing material incineration pretreatment reaction device according to claim 8, characterized in that: The temperature control unit comprises a heating belt wound around the side wall of the kettle body (1), and the outer side of the heating belt is wrapped with a heat-insulating layer.

10. The horizontal high-bromine-containing material incineration pretreatment reaction device according to claim 9, characterized in that: The top of the kettle body (1) is provided with an exhaust gas discharge pipe (91), and the exhaust gas discharge pipe (91) is provided with an electromagnetic valve (92).

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