Solid waste fuel combustion dual-channel smoke exhaust device

Abstract

The utility model discloses a solid waste fuel combustion double-channel smoke exhaust device which comprises a combustion cylinder, a first smoke outlet and a second smoke outlet are formed in the top face of the combustion cylinder, and the combustion cylinder horizontally conveys solid waste fuel through a conveying device and ignites the solid waste fuel on the conveying device through an ignition device. The first flue gas outlet and the second flue gas outlet are sequentially arranged in the conveying direction of the conveying device; two inlets of the three-way pipeline are respectively communicated with the first flue gas outlet and the second flue gas outlet, an induced draft fan is arranged on an outlet of the three-way pipeline, and a regulating valve is arranged between the inlet and the outlet. According to the solid waste fuel drying and burning device, solid waste fuel can be fully burnt after being fully dried, and the treatment effect on the solid waste fuel is improved.

Description

Technical Field

[0001] The utility model relates to the field of solid waste fuel combustion equipment, in particular to a double-channel smoke exhaust device for solid waste fuel combustion. Background Art

[0002] At present, the generation of solid wastes such as domestic garbage and municipal sludge has increased dramatically. The two most common treatment methods for this type of solid waste are landfill and incineration. The landfill process is affected by various environmental factors and the conditions are relatively harsh. Improper treatment can easily cause secondary pollution to groundwater, soil, etc. The incineration treatment of solid waste is to use an incinerator to heat and dry the dehydrated material, and then use high temperature to oxidize the organic matter in the material to reduce the solid waste fuel to a small amount of ash.

[0003] Existing devices for incinerating solid waste usually have drying equipment at the front end of the combustion, which is costly and complex, with many maintenance procedures. At the same time, the drying process consumes a lot of energy, and the combustion process cannot guarantee the full combustion of the material. Since the temperature distribution in the device is related to the position of the feed port and the smoke exhaust port, it is easily affected by the fluctuation of the feed temperature, resulting in uneven temperature distribution in the device, making it difficult to form stable combustion. In addition, in common vertical furnaces or horizontal furnaces, the volatile matter content and carbon content of the rear-end materials decrease, while the ash content increases, the combustion characteristics of the fuel deteriorate, and the furnace temperature decreases. At the same time, the smoke components in the gas phase increase and the oxygen content decreases, making it difficult for the fuel to burn fully, reducing the combustion efficiency and burnout rate. Utility Model Content

[0004] The utility model aims to provide a dual-channel smoke exhaust device for burning solid waste fuel, which enables the solid waste fuel to be fully burned after being fully dried, thereby improving the treatment effect of the solid waste fuel.

[0005] The technical solution adopted by the utility model to solve the above problems is:

[0006] A dual-channel smoke exhaust device for solid waste fuel combustion, comprising:

[0007] A combustion cylinder, in which the solid waste fuel is horizontally transported by a conveying device and the solid waste fuel on the conveying device is ignited by an ignition device, and a first smoke outlet and a second smoke outlet are arranged on the top surface of the combustion cylinder, and the first smoke outlet and the second smoke outlet are arranged in sequence along the conveying direction of the conveying device;

[0008] The two inlets of the three-way pipe are respectively connected with the first smoke outlet and the second smoke outlet. An induced draft fan is arranged on the outlet of the three-way pipe, and a regulating valve is arranged between the inlet and the outlet.

[0009] As a further improvement of the above technical solution, an air inlet is provided on the combustion tube, and the air inlet is located between the first smoke outlet and the second smoke outlet.

[0010] As a further improvement of the above technical solution, an air preheater is provided on the air inlet.

[0011] As a further improvement of the above technical solution, a plurality of temperature sensors for detecting the temperature of the solid waste fuel on the conveying device are provided on the inner wall surface of the combustion tube, and the temperature sensors are arranged at equal intervals along the conveying direction of the conveying device.

[0012] As a further improvement of the above technical solution, a plurality of supporting feet are provided on the bottom surface of the combustion tube.

[0013] As a further improvement of the above technical solution, a feed port and a discharge port are respectively provided on the top and bottom surfaces of the combustion tube, and the feed port and the discharge port are diagonally arranged relative to the combustion tube, and are respectively located directly above and obliquely below the conveying device.

[0014] As a further improvement of the above technical solution, the ignition device is located below the feed port and installed on the side of the combustion tube.

[0015] As a further improvement of the above technical solution, the cylinder wall of the combustion cylinder is a double-layer structure, and the outer layer and the inner layer of the cylinder wall are respectively made of metal material and refractory material.

[0016] Compared with the prior art, the utility model has the following advantages and effects:

[0017] (1) The utility model forms a dual-channel smoke exhaust structure on the device by setting the first smoke outlet and the second smoke outlet on the combustion tube in combination with the coordinated use of a three-way pipe. The solid waste fuel can be fully dried by the smoke at the front end of the conveying device, and the high-temperature smoke can be used to improve the drying efficiency of the material. At the same time, the air supply position is centered, which is beneficial to increase the oxygen content at the front and rear ends of the device, promote the full combustion of the fuel, and then improve the combustion efficiency and burnout rate of the solid waste fuel, thereby ensuring the treatment effect of the device on the solid waste fuel.

[0018] (2) The utility model improves the utilization rate of high-temperature flue gas by using it for both drying and auxiliary combustion, and ensures the degree of combustion of solid waste fuel in the device, achieving the effect of burning and deodorizing the solid waste fuel, and realizing the reduction of volume and amount of low calorific value solid waste fuel, as well as the stabilization and safety of the post-combustion products.

[0019] (3) The utility model controls the flow rates of two high-temperature flue gases in the three-way pipe by adjusting the opening degree of the two regulating valves, thereby controlling the amount of high-temperature flue gas in the combustion tube, thereby ensuring the drying effect and auxiliary combustion effect of the device on the solid waste fuel on the conveying device, so that the solid waste fuel can be fully burned after being fully dried, thereby improving the treatment effect of the device on the solid waste fuel. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a double-channel smoke exhaust device for solid waste fuel combustion according to the utility model.

[0021] Figure 2 It is a schematic enlarged diagram of the internal structure of a part of a dual-channel smoke exhaust device for solid waste fuel combustion according to the utility model.

[0022] Figure 3 It is a schematic enlarged view of the internal structure of part 2 of a dual-channel smoke exhaust device for solid waste fuel combustion according to the utility model.

[0023] Among them, there are a combustion tube 1, a first smoke outlet 11, a second smoke outlet 12, a feed port 13, a discharge port 14, an air inlet 15, a three-way pipe 2, an inlet 21, an outlet 22, a conveying device 3, an ignition device 4, an induced draft fan 5, a regulating valve 6, a supporting foot 7, an air preheater 8, and a temperature sensor 9. DETAILED DESCRIPTION

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and through examples. The following examples are provided to explain the present invention, but the present invention is not limited to the following examples.

[0025] See also Figure 1-Figure 3 The present embodiment provides a dual-channel smoke exhaust device for solid waste fuel combustion, including a combustion tube 1 and a three-way pipe 2. The combustion tube 1 is horizontally transported by a conveying device 3 and the solid waste fuel on the conveying device 3 is ignited by an ignition device 4. A first smoke outlet 11 and a second smoke outlet 12 are provided on the top surface of the combustion tube 1. The first smoke outlet 11 and the second smoke outlet 12 are arranged in sequence along the conveying direction of the conveying device 3. The two inlets 21 of the three-way pipe 2 are respectively connected to the first smoke outlet 11 and the second smoke outlet 12. An induced draft fan 5 is provided on the outlet 22 of the three-way pipe 2, and a regulating valve 6 is provided between the inlet 21 and the outlet 22.

[0026] When in use, the solid waste fuel is transported horizontally through the transport device 3, and burns to form high-temperature flue gas after being ignited by the ignition device 4. Under the action of the induced draft fan 5, the high-temperature flue gas in the combustion tube 1 enters from the inlet 21 of the three-way pipe 2 through the first flue gas outlet 11 and the second flue gas outlet 12 and is discharged from the outlet 22 thereof. In this process, by adjusting the opening degree of the two regulating valves 6, the flow rate of the two high-temperature flue gases in the three-way pipe 2 is controlled, so as to achieve the purpose of controlling the amount of the high-temperature flue gas in the combustion tube 1.

[0027] During the discharge of the high-temperature flue gas through the first flue gas outlet 11, the high-temperature flue gas will flow in the opposite direction of the conveying direction of the solid waste fuel, thereby achieving a countercurrent heat exchange effect in the contact between the high-temperature flue gas and the solid waste fuel, thereby improving the drying effect of the solid waste fuel.

[0028] During the discharge of the high-temperature flue gas through the second flue gas outlet 12, the high-temperature flue gas will flow along the conveying direction of the solid waste fuel, thereby achieving an auxiliary combustion effect in the contact between the high-temperature flue gas and the solid waste fuel, so that the solid waste fuel can be fully burned.

[0029] In order to ensure the safety of direct emission of high-temperature flue gas, the high-temperature flue gas discharged from the combustion tube 1 can first be denitrified by denitrification equipment, and then be dusted by dust removal equipment (such as bag dust removal device or electrostatic dust removal device) before entering the deacidification reaction tower to remove acidic substances in the high-temperature flue gas (that is, the acidic substances in the high-temperature flue gas (such as HCL, SO2) fully react with the atomized lime slurry in the deacidification reaction tower, and Ca(OH)2 and activated carbon powder are sprayed into the flue at the outlet 22 of the deacidification reaction tower, so that the acidic substances in the high-temperature flue gas that have not been completely removed continue to react with Ca(OH)2 to be removed, and at the same time, dioxins, mercury and other heavy metals in the high-temperature flue gas are adsorbed by activated carbon), and finally discharged through the chimney to meet the standards.

[0030] In this embodiment, the cylinder wall of the combustion cylinder 1 is a double-layer structure, and the outer layer and inner layer of the cylinder wall are respectively made of metal material and refractory material. While ensuring the strength of the combustion cylinder 1, it also reduces the damage to the combustion cylinder 1 caused by the combustion of solid waste fuel and improves the safety of the device.

[0031] In this embodiment, the conveying device 3 is a vibrating conveyor. During the process of conveying solid waste fuel, the solid waste fuel can be dispersed and loosened due to vibration, which is conducive to the diffusion of high-temperature flue gas into the solid waste fuel, so that the solid waste fuel and high-temperature flue gas can fully exchange heat and ensure the drying effect.

[0032] See also Figure 1 A plurality of supporting feet 7 are provided on the bottom surface of the combustion tube 1, so that the combustion tube 1 can be suspended off the ground, thereby ensuring the safety of the device.

[0033] A feed port 13 and a discharge port 14 are respectively provided on the top and bottom surfaces of the combustion tube 1. The feed port 13 and the discharge port 14 are diagonally arranged relative to the combustion tube 1. The feed port 13 and the discharge port 14 are respectively located directly above and obliquely below the conveying device 3, which facilitates the addition and recovery of solid waste fuel on the conveying device 3, thereby ensuring long-term continuous use of the device.

[0034] See also Figure 1 An air inlet 15 is provided on the bottom surface of the combustion tube 1, and the air inlet 15 is located between the first flue gas outlet 11 and the second flue gas outlet 12, so that external air can enter the combustion tube 1 through the air inlet 15, thereby providing sufficient oxygen for the combustion of the solid waste fuel on the conveying device 3 and ensuring the combustion of the solid waste fuel.

[0035] The air inlet 15 is provided with an air preheater 8, which can preheat the air entering the combustion tube 1, reduce the temperature fluctuation in the combustion tube 1 caused by the air entering, and ensure the stability of the temperature in the combustion tube 1.

[0036] See also Figure 2 The ignition device 4 is located below the feed port 13 and installed on the side of the combustion tube 1, thereby ensuring the ignition effect of the solid waste fuel on the conveying device 3.

[0037] In this embodiment, the flame spraying direction of the ignition device 4 is perpendicular to the conveying direction of the conveying device 3, thereby reducing the influence of the flame spraying operation on the flow of high-temperature flue gas.

[0038] See also Figure 3 The inner wall surface of the combustion tube 1 is provided with a plurality of temperature sensors 9 for detecting the temperature of the solid waste fuel on the conveying device 3, and the temperature sensors 9 are arranged at equal intervals along the conveying direction of the conveying device 3. Through the real-time detection of the temperature of the solid waste fuel, the influence of the opening degree of the regulating valve 6 on the combustion of the solid waste fuel in the combustion tube 1 can be visualized, so that the opening degree of the regulating valve 6 can be adjusted according to the detection result of the temperature sensor 9, and the stability of the combustion temperature in the combustion tube 1 is guaranteed.

[0039] The above contents described in this specification are merely examples of the present utility model. Those skilled in the art of the present utility model may make various modifications or additions to the specific embodiments described, or replace them in similar ways, as long as they do not deviate from the contents of the present utility model specification or exceed the scope defined in the claims, they shall all fall within the protection scope of the present utility model.

Claims

1. A dual-channel smoke exhaust device for solid waste fuel combustion, characterized in that: include: A combustion cylinder, in which the solid waste fuel is horizontally transported by a conveying device and the solid waste fuel on the conveying device is ignited by an ignition device, and a first smoke outlet and a second smoke outlet are arranged on the top surface of the combustion cylinder, and the first smoke outlet and the second smoke outlet are arranged in sequence along the conveying direction of the conveying device; The two inlets of the three-way pipe are respectively connected with the first smoke outlet and the second smoke outlet. An induced draft fan is arranged on the outlet of the three-way pipe, and a regulating valve is arranged between the inlet and the outlet.

2. The dual-channel smoke exhaust device for solid waste fuel combustion according to claim 1, characterized in that: The combustion tube is provided with an air inlet, and the air inlet is located between the first smoke outlet and the second smoke outlet.

3. The dual-channel smoke exhaust device for solid waste fuel combustion according to claim 2 is characterized in that: An air preheater is arranged on the air inlet.

4. The dual-channel smoke exhaust device for solid waste fuel combustion according to claim 1, characterized in that: A plurality of temperature sensors for detecting the temperature of the solid waste fuel on the conveying device are arranged on the inner wall surface of the combustion tube, and the temperature sensors are arranged at equal intervals along the conveying direction of the conveying device.

5. The dual-channel smoke exhaust device for solid waste fuel combustion according to claim 1, characterized in that: A plurality of supporting legs are arranged on the bottom surface of the combustion tube.

6. The dual-channel smoke exhaust device for solid waste fuel combustion according to claim 5, characterized in that: A feed inlet and a discharge port are respectively arranged on the top surface and the bottom surface of the combustion tube, and the feed inlet and the discharge port are diagonally arranged relative to the combustion tube, and are respectively located directly above and obliquely below the conveying device.

7. The dual-channel smoke exhaust device for solid waste fuel combustion according to claim 6, characterized in that: The ignition device is located below the feed port and is installed on the side of the combustion tube.

8. The dual-channel smoke exhaust device for solid waste fuel combustion according to claim 1, characterized in that: The cylinder wall of the combustion cylinder is a double-layer structure, and the outer layer and the inner layer of the cylinder wall are respectively made of metal material and refractory material.

Images