Garbage incinerator with low nitrogen oxide emission

Abstract

The utility model relates to the technical field of power generation equipment, in particular to a garbage incinerator with low nitrogen oxide emission, which comprises an incinerator body, a gas supply device and a circulating gas pipe, garbage fuel enters the high-temperature combustion chamber through the feeding port to be combusted, and combustion ash is discharged through the discharging port. One end of the circulating gas pipe communicates with the low-temperature combustion chamber, the other end of the circulating gas pipe communicates with the mixer, the circulating gas pipe can suck part of smoke in the low-temperature combustion chamber into the mixer in the gas supply device, meanwhile, the first fan sucks air into the mixer, mixed gas is formed in the mixer, and the mixed gas is further injected into the high-temperature combustion chamber through the gas inlet pipe. The oxygen concentration in the high-temperature combustion chamber can be reduced, an oxygen-deficient condition is created, and air rotational flow is formed. And a uniform temperature domain is formed in the high-temperature combustion chamber, so that the generation of nitrogen oxides is effectively reduced. And the working efficiency is high.

Description

Technical Field

[0001] The utility model relates to the technical field of power generation equipment, in particular to a low nitrogen oxide emission garbage incinerator. Background Art

[0002] Waste incineration power generation is a process that converts waste into heat energy through high-temperature combustion in an incinerator, and then generates electricity. This technology complies with the principle of "harmlessness, reduction, and resource utilization", that is, it eliminates harmful bacteria and toxic substances in the waste through high-temperature incineration, reduces the volume and weight of the waste, and recovers heat energy for power generation, realizing the comprehensive utilization of resources. Nitrogen oxides (NO x ) is one of the main pollutants of waste incineration power generation. Nitrogen oxides are a class of compounds composed of nitrogen and oxygen. The harm to the environment includes the formation of acid rain, photochemical smog, damage to human health and negative impact on the ecosystem. Nitrogen oxides enter the deep part of the human lungs through breathing and can cause bronchitis or emphysema. Nitrogen oxides can also react photochemically with other pollutants in the atmosphere to form photochemical smog pollution. Nitrogen oxides are oxidized into nitric acid in the atmosphere, which is one of the causes of acid rain. Nitrogen oxides can also reduce ozone in the stratosphere, thereby increasing the amount of ultraviolet radiation reaching the earth. Therefore, reducing the emission of nitrogen oxides is one of the important emission indicators of power plants.

[0003] Existing incinerators usually use an oxidation treatment method, where the flue gas discharged from the incinerator reacts with an oxidant to generate soluble and absorbable high-valent nitrogen oxides, and then the high-valent nitrogen oxides in the flue gas are sprayed and absorbed by an absorbent to generate nitrogen and water, thereby achieving the purpose of completely removing nitrogen oxides. Due to the high cost of oxidants and absorbents and low working efficiency, the cost of the oxidation treatment method is high. Therefore, it is necessary to propose an economical, environmentally friendly and efficient nitrogen oxide emission reduction equipment. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a low nitrogen oxide emission garbage incinerator, which can effectively reduce the emission of nitrogen oxides, has high working efficiency, and is economical and environmentally friendly.

[0005] A low nitrogen oxide emission garbage incinerator according to an embodiment of the utility model comprises:

[0006] An incinerator body, wherein a high-temperature combustion chamber and a low-temperature combustion chamber are arranged inside the incinerator body; a discharge port is arranged at the lower end of the incinerator body, and a feed port is arranged on the side wall of the incinerator body; an exhaust port is arranged at the upper end of the incinerator body;

[0007] An air supply device, wherein the air supply device is provided with a first fan, a mixer and an air intake pipe, wherein the output end of the first fan is connected to the mixer, and the upper end of the mixer is connected to the high-temperature combustion chamber through the air intake pipe;

[0008] A circulating air pipe, one end of which is connected to the low-temperature combustion chamber; and the other end of which is connected to the lower end of the mixer.

[0009] According to some embodiments of the utility model, the air intake pipe includes a main air pipe and at least two bronchi, and all of the bronchi are evenly distributed in the vertical direction; one end of all of the bronchi are respectively connected to the high-temperature combustion chamber, and the other end of all of the bronchi are respectively connected to the main air pipe; the main air pipe is connected to the mixer.

[0010] According to some embodiments of the present utility model, a solenoid valve is provided on each of the bronchus.

[0011] According to some embodiments of the present utility model, a safety valve is provided at the connection between the main air pipe and the mixer.

[0012] According to some embodiments of the present invention, the axis of the bronchus is tangent to the inner wall of the high-temperature combustion chamber.

[0013] According to some embodiments of the present invention, the incinerator body is provided with a collection box at the lower end of the discharge port.

[0014] According to some embodiments of the present invention, an exhaust valve is provided on the mixer.

[0015] According to some embodiments of the present invention, a second fan is provided on the circulating air duct.

[0016] According to some embodiments of the present utility model, one end of the circulating air pipe is connected to the incinerator body at an angle.

[0017] According to some embodiments of the present invention, a tapered portion is provided at the upper end of the high temperature combustion chamber.

[0018] A low nitrogen oxide emission garbage incinerator according to an embodiment of the utility model has at least the following beneficial effects:

[0019] According to the scheme of the utility model, the low nitrogen oxide emission garbage incinerator includes an incinerator body, an air supply device and a circulating air pipe, wherein the interior of the incinerator body is sequentially provided with a low-temperature combustion chamber and a high-temperature combustion chamber from top to bottom, and the garbage fuel enters the high-temperature combustion chamber through the feed port for combustion, and the burning ash is discharged through the discharge port. One end of the circulating air pipe is connected to the low-temperature combustion chamber, and the other end is connected to the mixer. The circulating air pipe can draw part of the flue gas in the low-temperature combustion chamber into the mixer in the air supply device, and at the same time, the first fan draws air into the mixer, and forms a mixed gas in the mixer, which is further injected into the high-temperature combustion chamber through the air intake pipe. Through the design of this structure, the oxygen concentration in the high-temperature combustion chamber can be reduced, the oxygen-deficient condition can be created, the local hot high-temperature zone can be eliminated, and an air vortex can be formed on the peripheral wall of the high-temperature combustion chamber through the air intake pipe. The volume of the flame formed in this way is greatly increased, the brightness is reduced, and a uniform temperature domain is formed in the high-temperature combustion chamber, which effectively reduces the generation of nitrogen oxides. It has high working efficiency and is economical and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A structural schematic diagram of the utility model;

[0021] Figure 2 A schematic diagram of the structure of the gas supply device of the utility model;

[0022] Figure 3 It is a partial structural schematic diagram of the utility model.

[0023] In the figure:

[0024] 100-incinerator body, 101-high temperature combustion chamber, 102-low temperature combustion chamber, 103-conical part, 110-discharge port, 120-feed port, 130-exhaust port, 140-collection box;

[0025] 200-air supply device, 210-first fan, 220-mixer, 230-air inlet pipe, 231-main air pipe, 232-bronchial pipe, 233-solenoid valve, 240-safety valve, 250-exhaust valve;

[0026] 300-circulating air pipe, 310-second fan. DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0028] In the description of the present invention, it should be understood that the descriptions involving orientation, such as the orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0029] In the description of the present utility model, "a plurality" means more than two. If there is a description of "first" or "second", it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0030] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0031] Reference Figures 1 to 3As shown, the utility model discloses a low nitrogen oxide emission waste incinerator, which includes an incinerator body 100, an air supply device 200 and a circulating air pipe 300, wherein a high-temperature combustion chamber 101 and a low-temperature combustion chamber 102 are arranged inside the incinerator body 100; a discharge port 110 is arranged at the lower end of the incinerator body 100, and a feed port 120 is arranged on the side wall of the incinerator body 100; an exhaust port 130 is arranged at the upper end of the incinerator body 100; the air supply device 200 is provided with a first fan 210, a mixer 220 and an air inlet pipe 230, the output end of the first fan 210 is connected to the mixer 220, and the upper end of the mixer 220 is connected to the high-temperature combustion chamber 101 through the air inlet pipe 230; one end of the circulating air pipe 300 is connected to the low-temperature combustion chamber 102; the other end of the circulating air pipe 300 is connected to the lower end of the mixer 220. Specifically, in this embodiment, the interior of the incinerator body 100 is sequentially provided with a low-temperature combustion chamber 102 and a high-temperature combustion chamber 101 from top to bottom. The garbage fuel enters the high-temperature combustion chamber 101 through the feed port 120 for combustion, and the combustion ash is discharged through the discharge port 110. During combustion, the feed port 120 and the discharge port 110 are closed, and a relatively sealed combustion space is formed inside the incinerator body 100. One end of the circulating air pipe 300 is connected to the low-temperature combustion chamber 102, and the other end is connected to the mixer 220. The circulating air pipe 300 can draw part of the flue gas in the low-temperature combustion chamber 102 into the mixer 220 in the air supply device 200. At the same time, the first fan 210 draws air into the mixer 220 and forms a mixed gas in the mixer 220. Further, the mixed gas is injected into the high-temperature combustion chamber 101 through the air intake pipe 230. Through the design of this structure, the oxygen concentration in the high temperature combustion chamber 101 can be reduced, the oxygen-poor condition can be created, and the local hot and high temperature area in the high temperature combustion chamber 101 can be eliminated; when the garbage fuel is burned, the oxygen-snatching ability of the C element in the garbage fuel is stronger than that of the N element, so that the oxidation of N is hindered; an air swirl is formed on the peripheral wall of the high temperature combustion chamber 101 through the air intake pipe 230. The volume of the flame formed in this way is greatly increased, the brightness is reduced, and a uniform temperature domain is formed in the high temperature combustion chamber 101, which effectively reduces the generation of nitrogen oxides. The work efficiency is high, and it is economical and environmentally friendly.

[0032] In some embodiments of the utility model, the air intake pipe 230 includes a main air pipe 231 and at least two bronchial pipes 232, and all the bronchial pipes 232 are evenly distributed in the vertical direction; one end of all the bronchial pipes 232 is respectively connected to the high-temperature combustion chamber 101, and the other end of all the bronchial pipes 232 is respectively connected to the main air pipe 231; the main air pipe 231 is connected to the mixer 220. In this embodiment, after the mixed gas is mixed in the mixer 220, it enters the bronchial pipe 232 through the main air pipe 231, and the mixed gas is evenly distributed to various parts in the high-temperature combustion chamber 101 along the vertical direction through the bronchial pipe 232.

[0033] In some embodiments of the utility model, a solenoid valve 233 is respectively provided on each bronchus 232. Specifically, in the present embodiment, the air intake pipe 230 includes a main air pipe 231 and five bronchus 232, and the five bronchus 232 are evenly distributed in the vertical direction. A solenoid valve 233 is respectively provided on each bronchus 232. By providing the solenoid valve 233, the air flow of each bronchus 232 can be adjusted respectively, so as to ensure that a uniform temperature domain is formed in the high-temperature combustion chamber 101 when the overall height of the garbage fuel gradually decreases as the garbage fuel changes with time.

[0034] In some embodiments of the utility model, a safety valve 240 is provided at the connection between the main air pipe 231 and the mixer 220. In this embodiment, one end of the circulating air pipe 300 is connected to the low-temperature combustion chamber 102, and the other end is connected to the mixer 220. The circulating air pipe 300 can draw part of the smoke in the low-temperature combustion chamber 102 into the mixer 220 in the air supply device 200, and at the same time, the first fan 210 draws air into the mixer 220 and forms a mixed gas in the mixer 220. The air intake pipe 230 includes a main air pipe 231 and at least two bronchial pipes 232, and all the bronchial pipes 232 are evenly distributed in the vertical direction; one end of all the bronchial pipes 232 is respectively connected to the high-temperature combustion chamber 101, and the other end of all the bronchial pipes 232 is respectively connected to the main air pipe 231; the main air pipe 231 is connected to the mixer 220. By providing a safety valve 240 at the connection between the main gas pipe 231 and the mixer 220, the conveying direction of the mixed gas can be ensured and the backflow of the mixed gas can be prevented.

[0035] In some embodiments of the utility model, the axis of the bronchus 232 is tangent to the inner wall of the high-temperature combustion chamber 101. Specifically, in this embodiment, the air intake pipe 230 includes a main air pipe 231 and five bronchus 232, and the five bronchus 232 are evenly distributed in the vertical direction; one end of the bronchus 232 is connected to the main air pipe 231, and the other end of the bronchus 232 is tangent to the inner wall of the high-temperature combustion chamber 101; the main air pipe 231 extracts the mixed gas in the mixer 220 and injects it into the mixer 220 through the bronchus 232. In this embodiment, the structure in which the bronchus 232 is tangent to the inner wall of the high-temperature combustion chamber 101 can form a swirl in the circumferential direction of the garbage fuel, that is, the inner wall of the high-temperature combustion chamber 101. Ensure that a uniform temperature domain is formed in the high-temperature combustion chamber 101.

[0036] In some embodiments of the utility model, the incinerator body 100 is provided with a collection box 140 at the lower end of the discharge port 110. Specifically, in this embodiment, the garbage fuel enters the high-temperature combustion chamber 101 through the feed port 120 for combustion, and the combustion ash is discharged through the discharge port 110. During combustion, the feed port 120 and the discharge port 110 are closed, and a relatively sealed combustion space is formed inside the incinerator body 100. After the combustion is completed. The combustion ash can be discharged into the collection box 140 through the discharge port 110, which is convenient for the staff to carry out centralized treatment of the combustion ash.

[0037] In some embodiments of the present invention, an exhaust valve 250 is provided on the mixer 220. In this embodiment, by providing the exhaust valve 250, when the air pressure in the mixer 220 exceeds a set threshold, the exhaust valve 250 can be used to quickly release the pressure, thereby preventing the air pressure in the mixer 220 from exceeding the upper limit and causing a safety accident.

[0038] In some embodiments of the utility model, a second fan 310 is provided on the circulating air duct 300. In this embodiment, by providing the second fan 310 on the circulating air duct 300, the conveying direction of the gas in the circulating air duct 300 can be controlled to avoid smoke backflow, and at the same time, the output ratio of the smoke can be controlled.

[0039] In some embodiments of the utility model, one end of the circulating air pipe 300 is connected to the incinerator body 100 at an angle. Specifically, in this embodiment, the axis of one end of the circulating air pipe 300 and the horizontal plane have an inclination angle β, wherein 45°≤60°. Through the design of this structure, not only is it convenient to quickly extract the flue gas, but also part of the dust in the flue gas can be returned to the incinerator body 100 through the inclined circulating air pipe 300.

[0040] In some embodiments of the utility model, a tapered portion 103 is provided at the upper end of the high temperature combustion chamber 101. In this embodiment, a low temperature combustion chamber 102 and a high temperature combustion chamber 101 are sequentially provided inside the incinerator body 100 from top to bottom. The high temperature combustion chamber 101 is the main combustion area of ​​the garbage fuel. The low temperature combustion chamber 102 can cool the flue gas. By providing the tapered portion 103 at the upper end of the high temperature combustion chamber 101, the incinerator body 100 can be divided into the low temperature combustion chamber 102 and the high temperature combustion chamber 101. When the low temperature combustion chamber 102 and the high temperature combustion chamber 101 are connected, the relative separation of the temperature domain in the incinerator body 100 is achieved.

[0041] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A low nitrogen oxide emission waste incinerator, characterized in that: include: An incinerator body (100), wherein a high-temperature combustion chamber (101) and a low-temperature combustion chamber (102) are arranged inside the incinerator body (100); a discharge port (110) is arranged at the lower end of the incinerator body (100), and a feed port (120) is arranged on the side wall of the incinerator body (100); and an exhaust port (130) is arranged at the upper end of the incinerator body (100); An air supply device (200), the air supply device (200) being provided with a first fan (210), a mixer (220) and an air intake pipe (230), the output end of the first fan (210) being connected to the mixer (220), and the upper end of the mixer (220) being connected to the high-temperature combustion chamber (101) through the air intake pipe (230); A circulating air pipe (300), one end of which is in communication with the low-temperature combustion chamber (102); and the other end of which is in communication with the lower end of the mixer (220).

2. The low nitrogen oxide emission waste incinerator according to claim 1 is characterized in that: The air intake pipe (230) comprises a main air pipe (231) and at least two bronchial pipes (232), and all of the bronchial pipes (232) are evenly distributed in the vertical direction; one end of all of the bronchial pipes (232) are respectively connected to the high-temperature combustion chamber (101), and the other end of all of the bronchial pipes (232) are respectively connected to the main air pipe (231); and the main air pipe (231) is connected to the mixer (220).

3. The low nitrogen oxide emission waste incinerator according to claim 2 is characterized in that: Each of the bronchial tubes (232) is provided with a solenoid valve (233).

4. The low nitrogen oxide emission waste incinerator according to claim 3 is characterized in that: A safety valve (240) is provided at the connection between the main gas pipe (231) and the mixer (220).

5. The low nitrogen oxide emission waste incinerator according to claim 4 is characterized in that: The axis of the bronchial tube (232) is tangent to the inner wall of the high-temperature combustion chamber (101).

6. The low nitrogen oxide emission waste incinerator according to claim 1, characterized in that: The incinerator body (100) is provided with a collection box (140) at the lower end of the discharge port (110).

7. The low nitrogen oxide emission waste incinerator according to claim 1, characterized in that: The mixer (220) is provided with an exhaust valve (250).

8. The low nitrogen oxide emission waste incinerator according to claim 1, characterized in that: The circulating air pipe (300) is provided with a second fan (310).

9. The low nitrogen oxide emission waste incinerator according to claim 8, characterized in that: One end of the circulating gas pipe (300) is connected to the incinerator body (100) at an angle.

10. The low nitrogen oxide emission waste incinerator according to claim 1, characterized in that: A tapered portion (103) is provided at the upper end of the high-temperature combustion chamber (101).

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