Household garbage and stale garbage synergistic treatment system

Abstract

The utility model discloses a household garbage and stale garbage synergistic treatment system which comprises a stale garbage feeding hopper, a double-layer roller dryer, a crushing and conveying assembly and a stale garbage discharging hopper. The double-layer roller dryer comprises an outer cylinder and an inner cylinder, the inner cylinder is embedded in the outer cylinder, and the two ends of the inner cylinder are connected with the stale garbage feeding hopper and the stale garbage discharging hopper correspondingly so that stale garbage can enter and exit from the inner cylinder; a spiral conveying assembly is arranged in the inner cylinder so that stale garbage can move in the inner cylinder. A dead steam inlet and a dead steam outlet are formed in the two ends of the outer cylinder correspondingly, dead steam is introduced from the steam turbine side, and stale garbage is dried; dry stale garbage output by the stale garbage discharging hopper is conveyed to the crushing and conveying assembly, is crushed and then is conveyed into the garbage incinerator to be mixed with household garbage for combustion. The device has the advantages of convenience in use, high treatment efficiency, low cost and the like, and solves the problem that the treatment cost of stale garbage is high due to the fact that the existing equipment is too complicated.

Description

Technical Field

[0001] The utility model belongs to the technical field of garbage incineration treatment, and specifically relates to a system for treating domestic garbage in coordination with stale garbage. Background Art

[0002] At present, the remaining storage capacity of landfills in many large cities in my country is running out. However, new landfills are facing the dilemma of difficult site selection, and due to serious environmental pollution, they are not in line with the current concept of green environmental protection.

[0003] At the same time, most cities' domestic waste incineration projects are in a saturated state, and coordinated disposal of domestic waste has become the current hot spot. Large-scale landfill stale waste re-excavation projects are expected to become an important development fulcrum for the stock management industry in the future.

[0004] Stale garbage contains a lot of water, and its low calorific value directly affects the working conditions of the garbage incinerator, resulting in reduced boiler efficiency, waste of resources, and even affecting the qualified emissions of environmental protection indicators. Referring to the "Technical Policy for Urban Domestic Waste Treatment and Pollution Prevention" and related materials, garbage with a low calorific value of <3300kJ / kg is not easy to be incinerated. Stale garbage also has the problem of many impurities. Large pieces of garbage, metals, ceramics and other undecomposed hard objects may have a direct damage effect on the grate of the garbage incinerator, which may cause the grate to become stuck, worn, and frequently tripped, shortening the service life of the grate.

[0005] Most existing technologies adopt the method of sorting stale garbage, classifying its components and then co-incinerating the combustible parts. Sorting stale garbage requires a relatively complex system equipment to achieve its classification and comprehensive utilization. The equipment itself has high cost and maintenance cost, and stale garbage has high humidity, is easy to clump, and is difficult to screen. Utility Model Content

[0006] The technical problem to be solved by the utility model is that in the prior art, a relatively complex system equipment is needed to realize the classification and comprehensive utilization of stale garbage, the equipment itself has high cost and maintenance cost, and the stale garbage has high humidity, is easy to clump, and is difficult to screen. The utility model provides a system for the coordinated treatment of domestic garbage and stale garbage with a compact structure, easy to use, high treatment efficiency and low cost.

[0007] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0008] A system for treating domestic waste in coordination with stale waste, comprising: a stale waste feed hopper, a double-layer drum dryer, a crushing and conveying assembly and a stale waste discharge hopper; the double-layer drum dryer comprises an outer cylinder and an inner cylinder, the inner cylinder is nested inside the outer cylinder, and the two ends of the inner cylinder are respectively connected to the stale waste feed hopper and the stale waste discharge hopper to enable the stale waste to enter and exit the inner cylinder; a spiral conveying assembly is provided inside the inner cylinder to enable the stale waste to move in the inner cylinder; an exhaust steam inlet and an exhaust steam outlet are respectively provided at the two ends of the outer cylinder to enable the exhaust steam to be introduced from the turbine side to dry the stale waste in the inner cylinder; the dried stale waste outputted from the stale waste discharge hopper is transported to the crushing and conveying assembly, and after being crushed, is sent to a waste incinerator to be mixed with domestic waste for combustion.

[0009] As a further improvement of the present invention, the exhaust steam outlet is connected to a water collecting tank, and a spray head is provided inside the water collecting tank to cool the exhaust steam output from the exhaust steam outlet and recover the drain water.

[0010] As a further improvement of the present invention, the length of the inner cylinder is greater than that of the outer cylinder, and the outer cylinder is located between the stale garbage feed hopper and the stale garbage discharge hopper.

[0011] As a further improvement of the utility model, the stale garbage discharge hopper and the crushing and conveying assembly are connected through a pipeline with a gate valve.

[0012] As a further improvement of the present invention, the crushing and conveying assembly includes a crusher and a conveyor belt assembly, the input end of the crusher is connected to the stale garbage discharge hopper, the output end of the crusher is connected to the input end of the conveyor belt assembly, and the output end of the conveyor belt assembly is connected to the incinerator feed hopper.

[0013] As a further improvement of the utility model, baffles are provided in the stale garbage feed hopper and the incinerator feed hopper.

[0014] As a further improvement of the utility model, the double-layer drum dryer is arranged at an angle.

[0015] As a further improvement of the utility model, a solenoid valve with an adjustable opening is provided on the connecting pipe between the exhaust steam inlet and the steam turbine to adjust the amount of exhaust steam entering the inner cylinder.

[0016] Compared with the prior art, the advantages of the utility model are:

[0017] The utility model of the domestic waste cooperative stale waste treatment system directly puts the stale waste into the double-layer drum dryer, and introduces the exhaust steam generated by the steam turbine into the outer cylinder of the dryer. The stale waste moves while drying in the inner cylinder of the dryer, and takes advantage of the sufficient steam of the power plant to solve the problem that the stale waste has high humidity and low calorific value, and the direct synergistic incineration with domestic waste will affect the incineration working conditions; at the same time, a simple stale waste pretreatment and feeding system is proposed, which does not increase the work content of the garbage crane operator, and the stale waste does not enter the garbage bin to mix and ferment with the new garbage, leaving enough space for the new garbage to pile, mix and drain, and solves the landfill management problem at a relatively low cost. Finally, the slag after incineration is sent to the slag field for screening, which can achieve classification, metal recycling, and environmentally friendly bricks made of slag. The pretreatment process of the incineration plant is relatively simple, and there is no need to purchase sorting equipment. It is beneficial to the existing heat redundancy advantage, and can also achieve the purpose of comprehensive utilization. At the same time, it can also solve the problem that the existing domestic waste has nowhere to be disposed of after being picked out due to the closure of the landfill. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structural principle of the domestic waste cooperative stale waste treatment system in a specific embodiment of the utility model.

[0019] Figure 2 It is a schematic diagram of the process of coordinating the treatment of domestic waste and stale waste in a specific embodiment of the utility model.

[0020] Legend: 1. Stale garbage feed hopper; 2. Baffle; 3. Outer cylinder; 4. Inner cylinder; 5. Screw conveyor assembly; 6. Sprinkler head; 7. Gate valve; 8. Crusher; 9. Conveyor belt assembly; 10. Incinerator feed hopper; 11. Exhaust steam inlet; 12. Exhaust steam outlet; 13. Stale garbage discharge hopper; 14. Collection tank. DETAILED DESCRIPTION

[0021] The present invention is further described below in conjunction with the accompanying drawings and specific preferred embodiments, but the protection scope of the present invention is not limited thereby.

[0022] In the description of the present invention, it should be understood that the terms "side", "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0024] Example

[0025] like Figure 1 and Figure 2 As shown, the domestic waste cooperative stale waste treatment system of the utility model comprises: a stale waste feed hopper 1, a double-layer drum dryer, a crushing and conveying assembly and a stale waste discharge hopper 13. The double-layer drum dryer comprises an outer cylinder 3 and an inner cylinder 4, wherein the inner cylinder 4 is nested inside the outer cylinder 3, and the two ends of the inner cylinder 4 are respectively connected to the stale waste feed hopper 1 and the stale waste discharge hopper 13, so as to enable the stale waste to enter and exit the inner cylinder 4. A spiral conveying assembly 5 is provided inside the inner cylinder 4, so as to enable the stale waste to move in the inner cylinder 4. An exhaust steam inlet 11 and an exhaust steam outlet 12 are respectively provided at the two ends of the outer cylinder 3, so as to enable the exhaust steam that has done work to be introduced from the turbine side to dry the stale waste in the inner cylinder 4. The dried stale waste outputted from the stale waste discharge hopper 13 is transported to the crushing and conveying assembly, and after being crushed, it is sent to the waste incinerator to be mixed with domestic waste for combustion.

[0026] Furthermore, the double-layer drum dryer is made of corrosion-resistant materials and has a certain inclination angle to facilitate garbage transmission.

[0027] In this embodiment, by directly putting the stale garbage into the double-layer drum dryer, the exhaust steam generated by the steam turbine is introduced into the outer cylinder of the dryer, and the stale garbage moves while drying in the inner cylinder of the dryer, the advantage of sufficient steam in the power plant is used to solve the problem that the stale garbage has high humidity and low calorific value, and the direct incineration with domestic garbage will affect the incineration conditions; at the same time, a simple stale garbage pretreatment and feeding system is proposed, without adding additional work content to the garbage crane operator, the stale garbage does not enter the garbage bin to mix and ferment with the new garbage, leaving enough space for the new garbage to pile, mix and drain, and solve the landfill management problem at a relatively low cost. Finally, the slag after incineration is sent to the slag field for screening, which can achieve classification, metal recycling, and environmentally friendly bricks made of slag. The pretreatment process of the incineration plant is relatively simple, without the need to purchase sorting equipment, and is beneficial to the existing heat redundancy advantage, and can also achieve the purpose of comprehensive utilization. At the same time, it can also solve the problem that the existing domestic garbage has nowhere to be disposed of after being picked out due to the closure of the landfill.

[0028] like Figure 1As shown, the exhaust steam outlet 12 is connected to a water collecting tank 14, and a spray head 6 is provided inside the water collecting tank 14 to cool the exhaust steam output from the exhaust steam outlet 12, and the recovered deionized water continues to return to the steam-water cycle to achieve the recovery and utilization of heat and desalted water.

[0029] like Figure 1 As shown, the length of the inner cylinder 4 is greater than that of the outer cylinder 3, and the outer cylinder 3 is located between the stale garbage feed hopper 1 and the stale garbage discharge hopper 13. The outer cylinder 3 has sufficient capacity, and a solenoid valve with an adjustable opening is provided on the connecting pipe between the exhaust steam inlet 11 and the steam turbine to adjust the amount of exhaust steam entering the inner cylinder 4 according to the amount and humidity of the stale garbage, so as to improve the drying quality of the stale garbage.

[0030] like Figure 1 As shown, the stale garbage discharge hopper 13 and the crushing and conveying assembly are connected through a pipeline with a gate valve 7, and the gate valve 7 controls the connection and disconnection between the stale garbage discharge hopper 13 and the crushing and conveying assembly.

[0031] like Figure 1 As shown, the crushing and conveying assembly includes a crusher 8 and a conveyor belt assembly 9. The input end of the crusher 8 is connected to the stale garbage discharge hopper 13, the output end of the crusher 8 is connected to the input end of the conveyor belt assembly 9, and the output end of the conveyor belt assembly 9 is connected to the incinerator feed hopper 10. The dried and crushed stale garbage enters the incinerator through the incinerator feed hopper 10 and the fermented domestic garbage for coordinated treatment.

[0032] Specifically, the crusher 8 fully crushes the dried stale garbage, mainly large garbage, hard objects, etc. that may cause the grate and the slag discharger to get stuck, so as to facilitate the subsequent incineration treatment. The conveyor belt assembly 9 adopts the form of an electric mechanism driving the conveyor belt to directly transport the dried and crushed stale garbage to the incinerator feed hopper 10. The conveying amount can be controlled by the speed of the conveyor belt, which can reduce the mixing workload of the garbage crane operator and more accurately control the mixing ratio according to the working conditions of the incinerator.

[0033] like Figure 1 As shown, baffles 2 are provided in both the stale garbage feed hopper 1 and the incinerator feed hopper 10 to control the amount of garbage input.

[0034] In the present embodiment, the stale garbage is not sorted at the front end, but is directly dried, crushed and mixed with the burnt garbage by utilizing the existing steam heat source. Moreover, the stale garbage does not need to be fermented, but directly enters the hopper without entering the garbage bin and is not mixed with the new garbage that needs to be fermented, thus reserving sufficient space for the new garbage to be stacked, mixed and drained, which significantly reduces the difficulty and cost of handling the stale garbage.

[0035] Although the utility model is disclosed as above with preferred embodiments, it is not intended to limit the utility model. Any technician familiar with the art can use the above disclosed methods and technical contents to make many possible changes and modifications to the technical solution of the utility model without departing from the spirit and technical solution of the utility model, or modify it into an equivalent embodiment with equivalent changes. Therefore, any simple modification, equivalent replacement, equivalent change and modification made to the above embodiments according to the technical essence of the utility model without departing from the content of the technical solution of the utility model still falls within the scope of protection of the technical solution of the utility model.

Claims

1. A system for treating domestic waste in coordination with stale waste, characterized in that: include: A stale garbage feed hopper (1), a double-layer drum dryer, a crushing and conveying assembly, and a stale garbage discharge hopper (13); the double-layer drum dryer comprises an outer cylinder (3) and an inner cylinder (4), the inner cylinder (4) being nested inside the outer cylinder (3), and the two ends of the inner cylinder (4) being respectively connected to the stale garbage feed hopper (1) and the stale garbage discharge hopper (13) so as to enable the stale garbage to enter and exit the inner cylinder (4); a spiral conveying assembly (5) is provided inside the inner cylinder (4) so ​​as to enable the stale garbage to move in the inner cylinder (4); an exhaust steam inlet (11) and an exhaust steam outlet (12) are respectively provided at the two ends of the outer cylinder (3) so as to enable the exhaust steam to be introduced from the turbine side to dry the stale garbage in the inner cylinder (4); the dried stale garbage outputted from the stale garbage discharge hopper (13) is transported to the crushing and conveying assembly, and after being crushed, is then sent to a garbage incinerator to be mixed with domestic garbage for combustion.

2. The system for treating domestic waste in coordination with stale waste according to claim 1 is characterized in that: The exhaust steam outlet (12) is connected to a water collecting tank (14), and a spray head (6) is provided inside the water collecting tank (14) to cool the exhaust steam output from the exhaust steam outlet (12) and recover the drain water.

3. The system for treating domestic waste in coordination with stale waste according to claim 1 is characterized in that: The length of the inner cylinder (4) is greater than the length of the outer cylinder (3), and the outer cylinder (3) is located between the stale garbage feed hopper (1) and the stale garbage discharge hopper (13).

4. The system for treating domestic waste in coordination with stale waste according to any one of claims 1 to 3, characterized in that: The stale garbage discharge hopper (13) is connected to the crushing and conveying assembly via a pipeline with a gate valve (7).

5. The system for treating domestic waste in coordination with stale waste according to claim 4 is characterized in that: The crushing and conveying assembly comprises a crusher (8) and a conveyor belt assembly (9), wherein the input end of the crusher (8) is connected to a stale garbage discharge hopper (13), the output end of the crusher (8) is connected to the input end of the conveyor belt assembly (9), and the output end of the conveyor belt assembly (9) is connected to an incinerator feed hopper (10).

6. The system for treating domestic waste in coordination with stale waste according to claim 5 is characterized in that: The stale garbage feed hopper (1) and the incinerator feed hopper (10) are both provided with baffles (2).

7. The system for treating domestic waste in coordination with stale waste according to any one of claims 1 to 3, characterized in that: The double-layer drum dryer is arranged obliquely.

8. The system for treating domestic waste in coordination with stale waste according to any one of claims 1 to 3, characterized in that: A solenoid valve with an adjustable opening is provided on the connecting pipeline between the exhaust steam inlet (11) and the steam turbine, so as to adjust the amount of exhaust steam entering the inner cylinder (4).

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