Fire grate structure of household garbage incinerator

Abstract

The utility model belongs to a fire grate structure of a household garbage incinerator in the technical field of household garbage incinerators. Comprising a fire grate segment (1) and a fire grate segment base frame (2), the fire grate segment (1) is installed on the fire grate segment base frame (2), the fire grate segment base frame (2) is of a structure made of a hollow pipeline (3), the hollow pipeline (3) of the fire grate segment base frame (2) is of a communicating structure, and the hollow pipeline is communicated with a cooling medium conveying pipeline. The fire grate structure of the household garbage incinerator is simple in structure, the temperature of the fire grate segments can be effectively regulated and controlled, cooling is reliable, it is ensured that equipment can effectively operate for a long time, and meanwhile the service life of the fire grate segments is prolonged.

Description

Technical Field

[0001] This utility model belongs to the technical field of municipal solid waste incinerators, and more specifically, it relates to a grate structure for a municipal solid waste incinerator. Background Technology

[0002] Urban solid waste treatment is a complex and systematic project. With continuous socio-economic development and rapid urbanization, urban solid waste is increasing, leading to high waste treatment costs in many rural areas and a growing number of waste-to-energy incineration projects. However, due to the varying calorific values ​​of different types of urban solid waste, traditional waste-to-energy incineration grates have failed to generate sufficient economic benefits. The newly developed STP stepped grate effectively addresses the challenges of burning high-calorific-value waste. This new stepped grate effectively solves a series of problems, such as difficulty in burning waste and incomplete combustion. However, existing grates operate at high temperatures, limiting their long-term operation and impacting waste treatment efficiency. Furthermore, the high temperatures significantly shorten the lifespan of the grate bars, increasing maintenance costs.

[0003] Existing technology includes a technology entitled "A Small and Medium-Sized Waste Incinerator" with publication number "CN115493146A". This technology relates to the field of municipal solid waste incineration equipment and includes a furnace body. The furnace body has a connected furnace chamber, a settling chamber, a tail flue, and an outlet flue arranged sequentially from front to back. The furnace body also has a grate, a front arch, and a rear arch, with the front and rear arches positioned above the grate. Secondary air ducts are installed on the front and rear arches. The furnace body at the furnace chamber is equipped with in-furnace denitrification nozzles and in-furnace thermometers. A primary atomizing cooling device is installed at the top of the furnace chamber. An air preheater and a heat exchange device are installed in the tail flue, and a secondary atomizing cooling device is installed at the top of the tail flue. The outlet flue is led out from the rear of the furnace body. This invention has a compact structure and can effectively incinerate and environmentally treat waste that is relatively dispersed and has a low degree of comprehensive utilization of thermal energy.

[0004] However, this technology does not address the technical issues and solutions of this application. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a grate structure for municipal solid waste incinerators that is simple in structure, can effectively regulate the temperature of the grate bars, has reliable cooling, ensures long-term effective operation of the equipment, and improves the service life of the grate bars, in order to address the shortcomings of the existing technology.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] This utility model relates to a grate structure for a municipal solid waste incinerator, comprising grate plates and a grate plate base frame. The grate plates are mounted on the grate plate base frame, which is a structure made of hollow pipes. The hollow pipes of the grate plate base frame are interconnected and connected to a cooling medium delivery pipeline.

[0008] The hollow pipes of the grate base frame are divided into multiple groups, and each group of hollow pipes is connected to a cooling medium delivery pipeline.

[0009] The cooling medium is cooling water or cooling air.

[0010] The grate bars comprise multiple groups, with the multiple grate bars at the front end forming the front grate bar group and the multiple grate bars at the rear end forming the rear grate bar group.

[0011] The temperature of the front grate assembly is lower than that of the rear grate assembly.

[0012] The grate plates are mounted on the hollow pipe via arc-shaped slots.

[0013] The grate base frame is supported at the bottom by multiple pillars.

[0014] The cooling medium delivery pipeline is connected to a water tank or a cooling air conditioner, and a control valve and a control pump are installed on the cooling medium delivery pipeline.

[0015] The hollow pipe is a metal pipe.

[0016] The working principle and beneficial effects of this utility model are as follows:

[0017] The grate structure of this municipal solid waste incinerator, as described in this utility model, involves the combination of grate bars and a grate bar base frame. The grate bars are mounted on the grate bar base frame for supporting and conveying waste. The grate bar base frame is a hollow pipe structure, with the hollow pipes forming a continuous cooling pipe. This hollow pipe connects to a cooling medium delivery pipe, which supplies low-temperature cooling medium to the hollow pipe. The cooling medium circulates through the hollow pipe, and the grate bars are connected to these hollow pipes. This allows for heat exchange between the cooling medium and the grate bars as the medium passes through the hollow pipe, thus cooling the grate bars. This design enables temperature control of the grate bars, preventing overheating even during prolonged operation and eliminating the need for frequent equipment shutdowns, thus meeting the requirements of waste incineration. Furthermore, the reliable temperature control of the grate bars avoids damage from prolonged high temperatures, extending their service life. Attached Figure Description

[0018] The following is a brief explanation of the contents depicted in the accompanying drawings and the markings therein:

[0019] Figure 1 This is a schematic diagram of the grate structure of the municipal solid waste incinerator described in this utility model;

[0020] The labels in the attached diagram are as follows: 1. Grate bar; 2. Grate bar base frame; 3. Hollow pipe; 4. Front grate bar assembly; 5. Rear grate bar assembly; 6. Support column; 7. Bottom support. Detailed Implementation

[0021] The following description, with reference to the accompanying drawings, provides a more detailed explanation of the specific embodiments of this utility model, including the shape and structure of each component, the relative positions and connections between the parts, the functions and working principles of each part:

[0022] As attached Figure 1 As shown, this utility model relates to a grate bar 1 and a grate bar base frame 2. The grate bar 1 is mounted on the grate bar base frame 2, which is a structure made of hollow pipes 3. The hollow pipes 3 of the grate bar base frame 2 are interconnected, and the hollow pipes are connected to a cooling medium delivery pipeline. The above structure addresses the shortcomings of the prior art by proposing an improved technical solution. In the structural design, grate bars 1 and grate bar base frame 2 are combined. Grate bars 1 are installed on the grate bar base frame 2 for carrying and conveying waste. The grate bar base frame 2 is a structure made of hollow pipes 3, which are interconnected, forming a continuous cooling pipe. The hollow pipes 3 connect to a cooling medium delivery pipeline, which supplies low-temperature cooling medium to the hollow pipes. The cooling medium circulates through the hollow pipes 3, and the grate bars 1 are connected to them. This allows the cooling medium to exchange heat with the grate bars 1 as it passes through the hollow pipes 3, removing heat from the grate bars and cooling them down. The supply and temperature of the cooling medium can be controlled, enabling grate bar temperature regulation. Even during prolonged operation, overheating will not occur, eliminating the need for frequent equipment shutdowns and meeting the requirements of waste incineration. Furthermore, the reliable temperature control of the grate bars prevents damage from prolonged high temperatures, extending their service life. The grate structure of the municipal solid waste incinerator described in this utility model is simple in structure, can effectively regulate the temperature of the grate bars, has reliable cooling, ensures that the equipment can operate effectively for a long time, and at the same time improves the service life of the grate bars.

[0023] The hollow pipes 3 of the grate base frame 2 are divided into multiple groups, and each group of hollow pipes 3 is connected to a cooling medium delivery pipeline. In the above structure, each group of hollow pipes 3 is connected to the cooling medium delivery pipeline through a delivery branch pipe, and a regulating valve is installed on each delivery branch pipe. This allows for the opening and closing of different groups of hollow pipes 3 and the adjustment of the flow rate to meet different needs.

[0024] The cooling medium is either cooling water or cooling air. The cooling water or cooling air is supplied by a cooling source, which can be a water tank or a cooling air conditioner. The water tank provides cooling water, while the cooling air conditioner provides cooling air. The choice between providing cooling water or cooling air is made according to need.

[0025] The grate bars 1 comprise multiple groups. The multiple grate bars 1 located at the front end form the front grate bar group 4, and the multiple grate bars 1 located at the rear end form the rear grate bar group 5. The temperature of the front grate bar group 4 is lower than that of the rear grate bar group 5. In this structure, the grate bars 1 are designed to be horizontal, pushing the waste forward horizontally along the grate bars. The overall temperature of the front grate bar group 4 is lower than that of the rear grate bar group 5. Therefore, the front grate bar group 4 can be naturally cooled by external air circulation, while the rear grate bar group 5 can be forcibly cooled by cooling water or cooling air, effectively reducing the temperature of the grate bars and improving their service life.

[0026] The grate bars 1 are mounted on the hollow pipe 3 via arc-shaped slots. This structure ensures reliable connection of the grate bars and reliable contact with the hollow pipe, achieving reliable heat exchange.

[0027] The grate base frame 2 is connected to the bottom support 7 by multiple pillars 6. This structure ensures reliable connection and support for the grate base frame 2 on-site.

[0028] The cooling medium delivery pipeline connects to a water tank or a cooling air conditioner, and a regulating valve and a regulating pump are installed on the cooling medium delivery pipeline. In this structure, the water tank or cooling air conditioner is the cooling source, while the regulating valve is used to control its opening and closing and the degree of opening. By controlling the delivery volume of the cooling medium, the temperature control requirements of the grate bars are met. The regulating pump is used to increase the delivery volume of the cooling medium.

[0029] The hollow pipe is a metal pipe. The metal pipe structure has good structural strength.

[0030] The grate structure of this municipal solid waste incinerator comprises grate bars 1 and a grate bar base frame 2. The grate bars 1 are mounted on the grate bar base frame 2 for carrying and conveying waste. The grate bar base frame 2 is a structure made of hollow pipes 3, which are interconnected, forming a continuous cooling pipe. The hollow pipes 3 are connected to a cooling medium delivery pipe, which supplies low-temperature cooling medium to the hollow pipe. The cooling medium circulates through the hollow pipe 3, and the grate bars 1 are connected to the hollow pipe 3. As the cooling medium passes through the hollow pipe 3, it exchanges heat with the grate bars 1, carrying away the heat from the grate bars and cooling them down. The supply and temperature of the cooling medium can be controlled. This allows for grate bar temperature regulation, preventing overheating even during prolonged operation and eliminating the need for frequent equipment shutdowns, thus meeting the requirements of waste incineration. Furthermore, the reliable temperature control of the grate bars avoids damage from prolonged high temperatures, extending their service life.

[0031] The present invention has been described above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any improvements made using the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A grate structure for a municipal solid waste incinerator, characterized in that: It includes grate bars (1) and grate bar base frame (2). The grate bars (1) are installed on the grate bar base frame (2). The grate bar base frame (2) is a structure made of hollow pipes (3). The hollow pipes (3) of the grate bar base frame (2) are a connecting structure. The hollow pipes are connected to the cooling medium conveying pipeline. The grate bars (1) include multiple groups, with the multiple grate bars (1) located at the front end forming the front grate bar group (4) and the multiple grate bars (1) located at the rear end forming the rear grate bar group (5). The temperature of the front grate assembly (4) is lower than that of the rear grate assembly (5); The front grate assembly (4) is naturally cooled by external air circulation, while the rear grate assembly (5) is forcibly cooled by cooling water or cooling air.

2. The grate structure of the municipal solid waste incinerator according to claim 1, characterized in that: The hollow pipes (3) of the grate base frame (2) are divided into multiple groups, and each group of hollow pipes (3) is connected to the cooling medium delivery pipeline.

3. The grate structure of a municipal solid waste incinerator according to claim 1 or 2, characterized in that: The cooling medium is cooling water or cooling air.

4. The grate structure of a municipal solid waste incinerator according to claim 1 or 2, characterized in that: The grate plate (1) is mounted on the hollow pipe (3) by means of an arc-shaped slot.

5. The grate structure of a municipal solid waste incinerator according to claim 1 or 2, characterized in that: The grate plate base frame (2) is connected to the bottom support (7) by multiple pillars (6).

6. The grate structure of a municipal solid waste incinerator according to claim 1 or 2, characterized in that: The cooling medium delivery pipeline is connected to a water tank or a cooling air conditioner, and a control valve and a control pump are installed on the cooling medium delivery pipeline.

7. The grate structure of a municipal solid waste incinerator according to claim 1 or 2, characterized in that: The hollow pipe is a metal pipe.

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