Household garbage and kitchen garbage co-processing device

Abstract

The utility model provides a household garbage and kitchen garbage co-processing device. The household garbage and kitchen garbage co-processing device comprises an incinerator, a tar recycling mechanism and a kitchen garbage processing mechanism, the tar recovery mechanism comprises a Y-shaped three-way pipeline and a cooling mechanism, an upper pipeline of the three-way pipeline is a smoke inlet pipeline and a smoke exhaust pipeline B, a lower pipeline of the three-way pipeline is a tar return pipe, the lower end of the tar return pipe penetrates through the bottom of the cold water tank and then is communicated with the incinerator, and the smoke inlet pipeline is communicated with the incinerator; the smoke exhaust pipeline B is communicated with the interlayer structure of the outer wall of the tank body of the anaerobic fermentation tank, and the inner cavity of the tank body is communicated with the incinerator through an anaerobic return pipe. By means of tar recycling, high-temperature flue gas recycling and kitchen anaerobic fermentation, tar and combustible gas recycling is achieved, high-calorific-value sufficient combustion of low-calorific-value household garbage is guaranteed, the flue gas purification burden is relieved, and therefore household garbage and kitchen garbage can be treated with low operation cost.

Description

Technical Field

[0001] This utility model relates to a device for the co-processing of household waste and kitchen waste, belonging to the field of waste treatment technology. Background Technology

[0002] Waste sorting is being gradually promoted, targeting the separate collection of small- to medium-sized household waste and kitchen waste. The traditional treatment method for small- to medium-sized organic solid waste such as kitchen waste and household waste is incineration. Household waste incineration produces high-temperature flue gas with high tar content, making high-temperature utilization difficult. The high tar content in the flue gas easily leads to flue gas pipe blockage. Furthermore, low-calorific-value organic solid waste burns at low temperatures in the furnace, resulting in incomplete combustion. To effectively utilize the tar in the flue gas and achieve emission standards, significant investment is required for exhaust gas treatment, leading to high investment and operating costs. Additionally, the separate treatment of household waste and kitchen waste generally fails to effectively utilize the biogas produced after anaerobic digestion of kitchen waste. Utility Model Content

[0003] This invention addresses the problems existing in the prior art by providing a co-processing device for municipal solid waste and kitchen waste. It employs a tar recovery device to cool and recirculate the tar in the flue gas back to the incinerator, thereby reducing the tar content of the flue gas. Simultaneously, the tar recirculation to the incinerator increases the calorific value of low-calorific-value organic solid waste, reducing the amount of fuel needed for incineration and lowering operating costs. Furthermore, the flue gas after tar recirculation provides the necessary temperature for the anaerobic fermentation of kitchen waste, ensuring effective fermentation within the anaerobic digester. The biogas produced during fermentation in the anaerobic digester is then recirculated back to the incinerator, ensuring complete combustion of the organic solid waste.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0005] This utility model provides a device for the co-processing of municipal solid waste and kitchen waste, including an incinerator, a tar recovery mechanism, and a kitchen waste processing mechanism;

[0006] The tar recovery mechanism includes multiple Y-shaped tee pipes and a cooling mechanism. The upper pipes of each tee pipe are respectively a flue gas inlet pipe and a flue gas outlet pipe B, and the lower pipe of each tee pipe is a tar return pipe. The cooling mechanism includes a cold water circulation tank, a cold water tank, and a cold water return pipe equipped with a cold water fan. The cold water circulation tank and the cold water tank are connected through the cold water return pipe. Each tee pipe is located inside the cavity of the cold water tank. The lower end of each tar return pipe passes through the bottom of the cold water tank and connects to the incinerator. Each flue gas inlet pipe is connected to the incinerator through a flue gas outlet pipe A located at the top of the incinerator.

[0007] The anaerobic digester of the food waste treatment facility includes a tank body with a solid feed inlet at the top. A stirring mechanism is installed inside the tank body, and a sandwich structure is installed on the outer wall of the tank body. Each exhaust pipe B is connected to the sandwich structure on the outer wall of the tank body. The sandwich structure is connected to a spraying mechanism through a pipe. The inner cavity of the tank body is connected to the incinerator through an anaerobic reflux pipe, and a reflux fan is installed on the anaerobic reflux pipe.

[0008] Preferably, the food waste treatment device further includes a crusher, with a feed hopper at the top of the crusher, the discharge port of the crusher being connected to the feed port of the dewatering conveyor, and the solid discharge port of the dewatering conveyor being connected to the discharge hopper located above the solid feed port of the tank.

[0009] Preferably, the dewatering conveyor includes a conveying cylinder and a screw conveying assembly shafted inside the conveying cylinder. A screen plate is provided below the screw conveying assembly, and the screen plate and the conveying cylinder cooperate to form a liquid storage tank.

[0010] Preferably, the incinerator is also equipped with a waste inlet, a grate, and a slag outlet.

[0011] Preferably, the spraying mechanism is equipped with a high-speed rotating nozzle.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] This invention reduces the tar content of flue gas by incorporating a tar recovery device that cools and recirculates the tar from the flue gas back to the incinerator, preventing pipe blockage. Simultaneously, the tar recirculation to the incinerator increases the calorific value of low-calorific-value organic solid waste, reducing the amount of fuel needed for incineration and lowering operating costs. The flue gas after tar recirculation provides the necessary temperature for the anaerobic fermentation of food waste, ensuring effective fermentation within the anaerobic digester. The biogas produced during fermentation is then returned to the incinerator, ensuring complete combustion of organic solid waste. Through tar recovery, high-temperature flue gas recovery, and anaerobic fermentation of food waste, this invention achieves the reuse of tar and combustible gas, ensuring the high-calorific-value combustion of low-calorific-value municipal solid waste, reducing the burden on flue gas purification, and thus achieving low-operating-cost treatment of municipal solid waste and food waste. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Attached reference numerals: 1. Incinerator; 2. Liquid storage tank; 3. Exhaust pipe A; 4. Exhaust pipe B; 5. Inlet pipe; 6. Tar return pipe; 7. Cold water circulation tank; 8. Cold water tank; 9. Cold water return pipe; 10. Cold water fan; 11. Tank body; 12. Stirring mechanism; 13. Anaerobic return pipe; 14. Return fan; 15. Spraying mechanism; 16. Crusher; 17. Feed hopper; 18. Discharge hopper; 19. Screw conveyor assembly; 20. Screen plate. Detailed Implementation

[0016] The present invention will be described in detail below with reference to the embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0017] like Figure 1 As shown, this utility model discloses a co-processing device for municipal solid waste and kitchen waste, including an incinerator 1, a tar recovery mechanism, and a kitchen waste processing mechanism;

[0018] Incinerator 1 is used to incinerate domestic waste. The food waste treatment unit separates the solid residue and slurry from the food waste and performs anaerobic fermentation on the solid residue. The tar recovery unit cools the exhaust gas from incinerator 1 to recover tar and sends the flue gas after tar recovery to the food waste treatment unit to promote anaerobic fermentation of the solid residue. The biogas produced by the anaerobic fermentation of the solid residue is returned to incinerator 1 to promote the complete combustion of domestic waste.

[0019] The tar recovery mechanism includes multiple Y-shaped tee pipes and a cooling mechanism. Optionally, there is one Y-shaped tee pipe, and an appropriate number of Y-shaped tee pipes are configured according to actual conditions. The upper pipe of each tee pipe is a smoke inlet pipe 5 and a smoke outlet pipe B4, and the lower pipe of each tee pipe is a tar return pipe 6. The cooling mechanism includes a cold water circulation tank 7, a cold water tank 8, and a cold water return pipe 9 equipped with a cold water fan 10. The cold water circulation tank 7 and the cold water tank 8 are connected through the cold water return pipe 9. Each tee pipe is located inside the cavity of the cold water tank 8. The lower end of each tar return pipe 6 passes through the bottom of the cold water tank 8 and connects to the incinerator 1. Each flue gas inlet pipe 5 is connected to the incinerator 1 through the flue gas exhaust pipe A3 located at the top of the incinerator 1. Cold water enters the cold water tank 8 from the cold water circulation tank 7 through the cold water return pipe 9. The cold water in the cold water circulation tank 7 and the cold water in the cold water tank 8 circulate continuously. The flue gas enters multiple T-junction pipes through the flue gas exhaust pipe A3 and is cooled down by the condensation of the cold water. The tar enters the incinerator 1 from multiple tar return pipes 6. This can reduce the amount of fuel replenished in the incinerator 1, reduce operating costs, and prevent flue gas from clogging the pipes.

[0020] The anaerobic digester of the food waste treatment facility includes a tank body 11. A solid feed inlet is provided at the top of the tank body 11. A stirring mechanism 12 is provided inside the tank body 11 to ensure that the food waste is fully stirred and fermented in the tank body 11. The outer wall of the tank body 11 is provided with a sandwich structure. Each exhaust pipe B4 is connected to the sandwich structure of the outer wall of the tank body 11. The sandwich structure is connected to the spraying mechanism 15 through pipes. The flue gas that has recovered tar enters the sandwich structure of the outer wall of the tank body 11 through each exhaust pipe B4 to provide energy for the anaerobic fermentation of solid residue in the food waste. The flue gas enters the spraying mechanism 15 for dust removal and desulfurization treatment before being discharged. The anaerobic return pipe 13 is connected to the incinerator 1. A return fan 14 is provided on the anaerobic return pipe 13. The biogas produced after the anaerobic fermentation of solid residue in the food waste enters the incinerator 1 through the anaerobic return pipe 13 to promote the complete combustion of domestic waste.

[0021] Optionally, the food waste treatment device further includes a crusher 16, with a feed hopper 17 at the top of the crusher 16. The discharge port of the crusher 16 is connected to the feed port of the dewatering conveyor, and the solid discharge port of the dewatering conveyor is connected to the discharge hopper 18 located above the solid feed port of the tank 11. Food waste enters the crusher 16 from the feed hopper 17 for crushing, and the crushed waste enters the dewatering conveyor for dewatering. The solid residue of the food waste is transported to the discharge hopper 18 and then falls into the tank 11 of the anaerobic digester for anaerobic fermentation.

[0022] Optionally, the dewatering conveyor includes a conveying cylinder and a screw conveying assembly 19 shaft-connected inside the conveying cylinder. A screen plate 20 is provided below the screw conveying assembly 19. The screen plate 20 and the conveying cylinder cooperate to form a liquid storage tank 2. The slurry produced by dewatering kitchen waste enters the liquid storage tank 2 through the screen plate 20 for collection and discharge.

[0023] Optionally, the incinerator 1 is also provided with a waste inlet, a grate, and a slag outlet.

[0024] Preferably, the spraying mechanism 15 is provided with a spray head that can rotate at high speed.

[0025] Anaerobic fermentation of kitchen waste does not require any external heat source and can achieve high-temperature anaerobic fermentation; the combustion of domestic waste is complete, and there is no tar blockage in the pipes and interlayer, realizing tar recovery and utilization. The high temperature inside the furnace of incinerator 1 can reach 1100℃.

[0026] This invention enables high-temperature incineration of municipal solid waste at 1100℃; anaerobic fermentation of kitchen waste efficiently produces biogas, eliminating the need for external heat sources and reducing operating costs by 50%; the exhaust gas is purified through desulfurization spraying to meet emission standards, with SOx emissions below 30mg / m³. 3 NOx emissions are below 50 mg / m³ 3Dioxin levels below 0.1 ng TEQ / m³ 3 CO emissions are below 15 mg / m³ 3 All of the above indicators meet the emission requirements of the "GB 18485-2014 Standard for Pollution Control of Municipal Solid Waste Incineration".

[0027] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions and substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A household garbage and kitchen garbage co-processing device, characterized in that, The incinerator (1), a tar recovery mechanism, and a kitchen waste treatment mechanism are included. The tar recovery mechanism includes multiple Y-shaped three-way pipes and a cooling mechanism. The upper pipes of each three-way pipe are respectively an inlet pipe (5) and an exhaust pipe B (4), and the lower pipe of each three-way pipe is a tar return pipe (6). The cooling mechanism includes a cold water circulation tank (7), a cold water tank (8), and a cold water return pipe (9) provided with a cold water fan (10). The cold water circulation tank (7) is in communication with the cold water tank (8) through the cold water return pipe (9). The multiple three-way pipes are arranged in the cavity of the cold water tank (8). The lower end of each tar return pipe (6) is in communication with the incinerator (1) after passing through the bottom of the cold water tank (8). Each inlet pipe (5) is in communication with the incinerator (1) through an exhaust pipe A (3) arranged at the top of the incinerator (1). The anaerobic fermentation tank of the kitchen waste treatment mechanism includes a tank body (11). The top of the tank body (11) is provided with a solid feed inlet. The inside of the tank body (11) is provided with a stirring mechanism (12). The outer wall of the tank body (11) is provided with a sandwich structure. Each exhaust pipe B (4) is in communication with the sandwich structure of the outer wall of the tank body (11). The sandwich structure is in communication with a spraying mechanism (15) through a pipe. The inner cavity of the tank body (11) is in communication with the incinerator (1) through an anaerobic return pipe (13). The anaerobic return pipe (13) is provided with a return fan (14).

2. The household garbage and kitchen garbage co-processing device according to claim 1, characterized in that, The kitchen waste treatment mechanism further includes a crusher (16). The top of the crusher (16) is provided with a feed hopper (17). The discharge port of the crusher (16) is in communication with the feed inlet of a dewatering conveyor. The solid discharge port of the dewatering conveyor is in communication with a discharge hopper (18) arranged above the solid feed inlet of the tank body (11).

3. The household garbage and kitchen garbage co-processing device according to claim 2, characterized in that, The dewatering conveyor includes a conveying cylinder and a spiral conveying assembly (19) shaft-connected in the conveying cylinder. The lower part of the spiral conveying assembly (19) is provided with a screening plate (20). The screening plate (20) cooperates with the conveying cylinder to form a liquid storage groove (2).

4. The household garbage and kitchen garbage co-processing device according to claim 3, characterized in that, The incinerator (1) is further provided with a garbage feed inlet, a grate, and a slag discharge port.

5. The household garbage and kitchen garbage co-processing device according to claim 4, characterized in that, The spraying mechanism (15) is provided with a spray head capable of high-speed rotation.

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