A low nitrogen oxide emission incinerator furnace device

Abstract

The utility model relates to incinerator technical field, especially a kind of low nitrogen oxides emission's incinerator hearth device, including combustion furnace body, the side of combustion furnace body outer wall middle part is equipped with ring pipe.The utility model has the advantages that: by with combustion furnace body as main body, while its outer wall is equipped with multiple flame projectors, while the outer wall of flow guide cylinder is equipped with multiple check valves, and the one end of flow guide cylinder is communicated with ring pipe, and then nitrogen oxides enter to the inside of combustion furnace body, ammonia water enters to the inside of flow guide cylinder by ring pipe, and is sprayed from multiple check valves, it is convenient to make ammonia water and nitrogen oxides fully mix, while flame projector sprays flame, heats combustion furnace body inside, ensure that the temperature in combustion furnace body inside is at reaction temperature, filter plate and filter core are convenient for filtering particulate matter in combustion gas, ensure the cleanliness degree of exhaust gas, to effectively solve the problems in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of incinerator technology, and in particular to an incinerator furnace device with low nitrogen oxide emissions. Background Technology

[0002] There are generally two methods for controlling nitrogen oxide pollution in flue gas from municipal solid waste incineration plants: one is to achieve "source control" by controlling incineration conditions, and the other is to achieve "end-of-pipe treatment" by treating exhaust gas. Due to the limitations of current technology, the denitrification efficiency that "source control" can achieve is only 10% to 20%, which is relatively low. In actual production, it is often necessary to combine "source control" and "end-of-pipe treatment".

[0003] SCR technology involves injecting a reducing agent into flue gas at a temperature of approximately 190–230°C to reduce nitrogen oxides (NOx) in the flue gas to nitrogen. SNCR (non-selective reduction) is a commonly used method for treating NOx in flue gas, which involves injecting ammonia water into a high-temperature zone within the furnace, utilizing the reducing properties of ammonia water to reduce NOx emissions and lower the concentration of NOx in the flue gas. However, the conditions for reducing NOx in SNCR are quite demanding; the reaction temperature must be around 900–1100°C for maximum efficiency. Currently, this method is widely used in waste incinerators (industrial furnaces), but it has significant drawbacks in these furnaces. Waste incinerators (industrial furnaces) require maintaining a high temperature within the furnace, and the injection of ammonia water directly leads to heat loss, potentially lowering the furnace temperature. Therefore, this application proposes a low-NOx emission incinerator furnace device to solve the aforementioned problems. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a furnace device for an incinerator with low nitrogen oxide emissions.

[0005] The purpose of this utility model is achieved through the following technical solution: a low-NOx emission incinerator furnace device, comprising a combustion furnace body, an annular pipe installed on one side of the middle of the outer wall of the combustion furnace body, control valves installed symmetrically on both sides of the outer wall, a plurality of circumferentially arrayed burners installed in the middle of the outer wall of the combustion furnace body, the plurality of burners facing the axis of the combustion furnace body, a flow guide cylinder installed inside the combustion furnace body, a plurality of one-way valves installed on its outer surface, and one end of the flow guide cylinder connected to the annular pipe through a plurality of pipes.

[0006] Optionally, both ends of the combustion furnace body are designed with a necking effect, and both ends of the combustion furnace body are equipped with connecting flanges. Filter plates and filter elements are installed sequentially from the inside to the outside of the combustion furnace body near the inside of the ring pipe.

[0007] Optionally, the outer wall of the combustion furnace is provided with multiple threaded holes in the middle, and multiple burners are threadedly connected to the multiple threaded holes respectively.

[0008] Optionally, the two control valves are connected to an external ammonia pumping device.

[0009] Optionally, the guide cylinder has a tapered shape at the end furthest from the annular pipe.

[0010] This utility model has the following advantages:

[0011] This low-NOx emission incinerator furnace device has a combustion furnace body as the main body, with multiple burners arranged in a circular array on its outer wall. Multiple one-way valves are also installed on the outer wall of a guide cylinder, one end of which is connected to a ring pipe. NOx enters the combustion furnace body from the end furthest from the filter element, while ammonia enters the guide cylinder through the ring pipe and is ejected from the multiple one-way valves, facilitating thorough mixing of the ammonia and NOx. Simultaneously, the burners emit flames to heat the interior of the combustion furnace body, ensuring the internal temperature is at the reaction temperature. The filter plates and filter elements effectively filter particulate matter in the combustion gases, guaranteeing the cleanliness of the exhaust gas and thus effectively solving the problems existing in the prior art. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the overall cross-sectional structure of this utility model;

[0014] Figure 3 This is a schematic diagram of the combustion furnace structure in this utility model;

[0015] Figure 4 This is a cross-sectional structural diagram of the combustion furnace body in this utility model.

[0016] In the diagram: 1-combustion furnace body, 2-control valve, 3-ring pipe, 4-burner, 5-filter element, 6-guide cylinder, 7-one-way valve, 8-filter plate, 9-threaded hole. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the following description.

[0018] like Figures 1 to 4As shown, a low-NOx emission incinerator furnace device includes a combustion furnace body 1. A ring pipe 3 is installed on one side of the middle of the outer wall of the combustion furnace body 1. Control valves 2 are installed symmetrically on both sides of the outer wall. Multiple burners 4 are installed in a circular array in the middle of the outer wall of the combustion furnace body 1. The multiple burners 4 are all facing the axis of the combustion furnace body 1. A flow guide cylinder 6 is installed inside the combustion furnace body 1. Multiple one-way valves 7 are installed on its outer surface. One end of the flow guide cylinder 6 is connected to the ring pipe 3 through multiple pipes.

[0019] As an optional technical solution of this utility model, both ends of the combustion furnace body 1 are designed with a necking effect. Both ends of the combustion furnace body 1 are equipped with connecting flanges. Filter plates 8 and filter elements 5 are installed sequentially from the inside to the outside of the combustion furnace body 1 near the ring pipe 3. After the necking process, the flow rate of nitrogen oxide gas decreases after entering the combustion furnace body 1, which facilitates uniform mixing with the ammonia water sprayed by multiple one-way valves 7, ensuring that the two react fully. At the same time, the filter plates 8 and filter elements 5 facilitate the filtration of the gas after the reaction, ensuring the cleanliness of the discharged gas. The flanges facilitate docking and connection with external pipelines, and also facilitate the disassembly, maintenance or replacement of the combustion furnace body 1 in the future.

[0020] As an optional technical solution of this utility model, a plurality of threaded holes 9 are provided in the middle of the outer wall of the combustion furnace body 1, and a plurality of burners 4 are threadedly connected to the plurality of threaded holes 9 respectively. This facilitates the provision of installation positions for the plurality of burners 4, and at the same time, the plurality of burners 4 are all directed toward the guide cylinder 6 to heat the sprayed ammonia water, so that the temperature inside the combustion furnace body 1 is at the optimal reaction temperature.

[0021] As an optional technical solution of this utility model, the two control valves 2 are connected to the external ammonia water pumping equipment, which makes it easier for the two control valves 2 to control the incoming ammonia water. The ammonia water is heated by the external pumping equipment and sprayed out from multiple one-way valves 7, thereby making the ammonia water and the surrounding nitrogen oxide gas uniformly mixed.

[0022] As an optional technical solution of this utility model, the outer shape of the guide cylinder 6 away from the ring pipe 3 is conical. This makes it easier for the conical structure to effectively reduce the obstruction to the airflow after the nitrogen oxides enter the interior of the combustion furnace body 1, while allowing the gas to flow along the outer wall of the guide cylinder 6, so that the ammonia water and nitrogen oxides can be fully contacted.

[0023] In summary, the features, assembly method, usage process, and functions of each component in this utility model are as follows: The combustion furnace body 1 is the main body, with multiple burners 4 arranged in a circumferential array on its outer wall. Multiple one-way valves 7 are installed on the outer wall of the guide cylinder 6. One end of the guide cylinder 6 is connected to the ring pipe 3, allowing nitrogen oxides to enter the combustion furnace body 1 from the end furthest from the filter element 5. Ammonia water enters the guide cylinder 6 through the ring pipe 3 and is sprayed out from the multiple one-way valves 7, facilitating thorough mixing of ammonia water and nitrogen oxides. Simultaneously, the burners 4 emit flames to heat the interior of the combustion furnace body 1, ensuring the temperature inside the combustion furnace body 1 is at the reaction temperature. The filter plate 8 and filter element 5 facilitate the filtration of particulate matter in the combustion gas, ensuring the cleanliness of the discharged gas, thereby effectively solving the problems existing in the prior art.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A low-NOx emission incinerator furnace device, characterized in that: The combustion furnace includes a combustion furnace body (1), on one side of the middle of the outer wall of the combustion furnace body (1) is a ring pipe (3), and control valves (2) are installed on both sides of the outer wall. Multiple flamethrowers (4) are installed in a circular array in the middle of the outer wall of the combustion furnace body (1), and the multiple flamethrowers (4) are all facing the axis of the combustion furnace body (1). A flow guide cylinder (6) is installed inside the combustion furnace body (1), and multiple one-way valves (7) are installed on its outer surface. One end of the flow guide cylinder (6) is connected to the ring pipe (3) through multiple pipes.

2. The incinerator furnace device with low nitrogen oxide emissions according to claim 1, characterized in that: Both ends of the combustion furnace body (1) are designed with a necking effect. Both ends of the combustion furnace body (1) are equipped with connecting flanges. The combustion furnace body (1) is equipped with a filter plate (8) and a filter element (5) from the inside to the outside of the ring pipe (3).

3. The incinerator furnace device with low nitrogen oxide emissions according to claim 1, characterized in that: The outer wall of the combustion furnace body (1) has multiple threaded holes (9) in the middle, and multiple flamethrowers (4) are threadedly connected to the multiple threaded holes (9).

4. The incinerator furnace device with low nitrogen oxide emissions according to claim 1, characterized in that: The two control valves (2) are connected to an external ammonia pumping equipment.

5. The incinerator furnace device with low nitrogen oxide emissions according to claim 1, characterized in that: The guide cylinder (6) has a conical shape at the end away from the annular pipe (3).

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