High sulfur coal burner

Abstract

The utility model provides a high sulfur coal combustor relates to high sulfur coal combustor technical field, including main combustion storehouse, reduction storehouse, injection port and feed pipe, the bottom end intercommunication of main combustion storehouse has feed pipe, the top of reduction storehouse is equipped with injection mechanism, injection mechanism includes liquid pump, feed pipe and gas pipe, the inside intercommunication of reduction storehouse with the output of liquid pump, the input of liquid pump intercommunication has feed pipe, the top intercommunication of reduction storehouse has gas pipe, the utility model discloses through liquid pump, feed pipe and gas pipe cooperation, inhale the limestone powder CaCO3 or dolomite powder CaMg (CO3) 2 after in the inside of reduction storehouse 2, will sulfur-fixing agent be injected into the inside of reduction storehouse 2, decompose into CaO and MgO under high temperature, with SO2 reaction generates CaSO4 and MgSO4, realize the sulfur-fixing rate in stove can reach 60% 70%, to solve the problem of the high desulfurization rate in the stove of CFB boiler in the prior art, but fuel adaptability is limited, wear is serious, the high NOx generation of coal powder combustor, difficult to reach ultra -low emission.

Description

Technical Field

[0001] This utility model relates to the field of high-sulfur coal burner technology, and in particular to high-sulfur coal burners. Background Technology

[0002] There are two core problems with the combustion of high-sulfur coal: High-temperature corrosion and slagging: SO2 generated by sulfur combustion is further oxidized to SO3 at high temperatures, which combines with water vapor to form sulfuric acid vapor, corroding water-cooled walls and heating surfaces; at the same time, minerals in the coal melt and adhere to the furnace wall at high temperatures, forming a slagging layer, reducing thermal efficiency and threatening equipment safety.

[0003] Excessive pollutant emissions: Traditional combustion methods increase the air volume in the main combustion zone to suppress slagging, leading to excessive NO emissions at the furnace outlet. X The concentration increases significantly (by 30%-50%), and the SO2 / SO3 conversion rate increases, which exacerbates the burden on the SCR denitrification system and increases the risk of ammonia escape.

[0004] In existing technologies, while circulating fluidized bed (CFB) boilers can achieve in-furnace desulfurization (desulfurization rate 80%-90%), they suffer from problems such as limited fuel adaptability and severe wear; pulverized coal burners, on the other hand, cause NO emissions due to high-temperature combustion. x The high sulfur content makes it difficult to meet ultra-low emission requirements. Therefore, this invention proposes a high-sulfur coal burner to solve the above problems. Utility Model Content

[0005] To address the aforementioned problems, this utility model proposes a high-sulfur coal burner to solve the issues of existing CFB boilers, which have high in-furnace desulfurization rates but limited fuel adaptability and severe wear; and pulverized coal burners with NO... x The problem is that high emissions make it difficult to achieve ultra-low emissions.

[0006] To achieve the purpose of this utility model, the utility model is implemented through the following technical solution: a high-sulfur coal burner, including a main combustion chamber, a reduction chamber, an injection port and a feed pipe, wherein the reduction chamber is connected to one side of the main combustion chamber, the injection port is connected to one side of the reduction chamber, the feed pipe is connected to the bottom of the main combustion chamber, and an injection mechanism is provided at the top of the reduction chamber.

[0007] A further improvement is that the injection mechanism includes a liquid pump, a material conveying pipe, and a gas conveying pipe. The output end of the liquid pump is connected to the interior of the reduction chamber, the input end of the liquid pump is connected to the material conveying pipe, and the top of the reduction chamber is connected to the gas conveying pipe.

[0008] A further improvement is that a flow guide plate is fixedly installed inside the injection port, and an igniter is fixedly connected inside the injection port.

[0009] A further improvement is that: the reduction chamber is symmetrically provided with flange structures on both sides, and the injection port and one side of the main combustion chamber are respectively detachably connected to the two flange structures by bolts.

[0010] A further improvement is made in that: a valve core is rotatably connected to one side of the inside of the reduction chamber, and a rotary motor is fixedly installed at the bottom of one side of the reduction chamber, with the output end of the rotary motor fixedly connected to the bottom end of the valve core.

[0011] A further improvement is that a drive motor is fixedly installed on the top of the main combustion chamber, and an impeller is rotatably installed inside the main combustion chamber. The output end of the drive motor is fixedly connected to the top of the impeller.

[0012] A further improvement is that a protective net is fixedly connected to the bottom of one side of the main combustion chamber, and the material is iron-chromium-aluminum (FeCrAl) mesh with a galvanized layer on the outside.

[0013] The beneficial effects of this utility model are as follows: by cooperating with a liquid pump, a feed pipe and a gas supply pipe, limestone powder CaCO3 or dolomite powder CaMg(CO3)2 is drawn into the inside of the reduction chamber, and then the desulfurizing agent is sprayed into the inside of the reduction chamber. At high temperature, it decomposes into CaO and MgO, and reacts with SO2 to generate CaSO4 and MgSO4, so that the desulfurization rate in the furnace can reach 60%-70%. This solves the problems of high desulfurization rate in the furnace of existing CFB boilers, but limited fuel adaptability and severe wear; and high NOx generation in pulverized coal burners, making it difficult to achieve ultra-low emissions. Attached Figure Description

[0014] Figure 1 This is the front view of the present invention; Figure 2 This is a schematic diagram of the reduction chamber structure of this utility model; Figure 3 This is a schematic diagram of the injection nozzle structure of this utility model; Figure 4 This is a schematic diagram of the feeding hopper structure of this utility model; Figure 5 This is a schematic diagram of the flow control mechanism of this utility model.

[0015] The components are: 1. Main combustion chamber; 2. Reduction chamber; 3. Injection port; 4. Feed pipe; 5. Liquid pump; 6. Feed pipe; 7. Gas pipe; 8. Guide plate; 9. Ignition device; 10. Rotary motor; 11. Valve core; 12. Drive motor; 13. Impeller; 14. Exhaust port; 15. Protective net. Detailed Implementation

[0016] To deepen the understanding of this utility model, the following detailed description will be provided in conjunction with embodiments. These embodiments are only used to explain this utility model and do not constitute a limitation on the scope of protection of this utility model.

[0017] according to Figure 1-5 As shown, this embodiment proposes a high-sulfur coal burner, including a main combustion chamber 1, a reduction chamber 2, an injection port 3, and a feed pipe 4. Its features include: the reduction chamber 2 is connected to one side of the main combustion chamber 1, the injection port 3 is connected to one side of the reduction chamber 2, the feed pipe 4 is connected to the bottom of the main combustion chamber 1, an injection mechanism is provided at the top of the reduction chamber 2, and the main combustion chamber 1 is equipped with a concentrated / dilute coal powder nozzle to separate the coal powder airflow into a dense phase with a high concentration and a dilute phase with a low concentration. The dense phase coal powder undergoes initial combustion in an oxygen-deficient environment, suppressing the formation of fuel-type NOx; the dilute phase coal powder undergoes supplementary combustion in a subsequent oxygen-enriched environment to ensure complete combustion. Reduction chamber 2 is located downstream of the main combustion zone. Secondary air is injected through the nozzle in a swirling motion, creating strong turbulence that thoroughly mixes unburned pulverized coal with the flue gas, further reducing NO. X The reduction efficiency is improved by 20%-30%.

[0018] The injection mechanism includes a liquid pump 5, a feed pipe 6, and a gas supply pipe 7. The output end of the liquid pump 5 is connected to the interior of the reduction chamber 2, the input end of the liquid pump 5 is connected to the feed pipe 6, and the top of the reduction chamber 2 is connected to the gas supply pipe 7. Through the cooperation of the liquid pump 5, the feed pipe 6, and the gas supply pipe 7, limestone powder CaCO3 or dolomite powder CaMg(CO3)2 is drawn into the interior of the reduction chamber 2, and the desulfurizing agent is sprayed into the interior of the reduction chamber 2. At high temperature, it decomposes into CaO and MgO, and reacts with SO2 to generate CaSO4 and MgSO4, so that the sulfur fixation rate in the furnace can reach 60%-70%.

[0019] A guide plate 8 is fixedly installed inside the injection port 3, and an igniter 9 is fixedly connected inside the injection port 3. The guide plate 8 stably divides the airflow, and the igniter 9 ignites the mixed gas to ensure stable combustion of the high-sulfur coal burner.

[0020] The reduction chamber 2 is symmetrically provided with flange structures on both sides, and the injection port 3 and one side of the main combustion chamber 1 are respectively detachably connected to the two flange structures by bolts.

[0021] A valve core 11 is rotatably connected to one side of the inside of the reduction chamber 2. A rotary motor 10 is fixedly installed at the bottom of one side of the reduction chamber 2. The output end of the rotary motor 10 is fixedly connected to the bottom end of the valve core 11. An external control console is electrically connected to the rotary motor 10 through a control circuit to control the rotary motor 10 to drive the valve core 11 to rotate forward and backward inside the reduction chamber 2, thereby controlling whether the valve core 11 closes one side of the reduction chamber 2, and thus controlling whether the reduction chamber 2 and the injection port 3 are connected.

[0022] A drive motor 12 is fixedly installed on the top of the main combustion chamber 1, and an impeller 13 is rotatably installed inside the main combustion chamber 1. The output end of the drive motor 12 is fixedly connected to the top of the impeller 13. The drive motor 12 drives the impeller 13 to rotate inside the main combustion chamber 1. The dust-laden gas enters the cylinder tangentially at a speed of 15-30 m / s, forming a high-speed rotating outer vortex airflow, which automatically draws the coal powder into the interior of the main combustion chamber 1, and enters the interior of the reduction chamber 2 through the centrifugal force generated by the rotation of the impeller 13.

[0023] A protective net 15 is fixedly connected to the bottom of one side of the main combustion chamber 1. The material is iron-chromium-aluminum (FeCrAl) mesh, and the outer side is provided with a galvanized layer. It can withstand high temperatures up to 1400℃ and isolates corrosive media through the galvanized layer.

[0024] This high-sulfur coal burner, through the cooperation of liquid pump 5, feed pipe 6 and gas pipe 7, draws in limestone powder CaCO3 or dolomite powder CaMg(CO3)2 inside the reduction chamber 2, and then sprays the desulfurizing agent into the inside of the reduction chamber 2. At high temperature, it decomposes into CaO and MgO, and reacts with SO2 to generate CaSO4 and MgSO4, so that the sulfur fixation rate in the furnace can reach 60%-70%.

[0025] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A high-sulfur coal burner, comprising a main combustion chamber (1), a reduction chamber (2), an injection port (3), and a feed pipe (4), characterized in that: One side of the main combustion chamber (1) is connected to the reduction chamber (2), one side of the reduction chamber (2) is connected to the injection port (3), the bottom end of the main combustion chamber (1) is connected to the feed pipe (4), and the top of the reduction chamber (2) is provided with an injection mechanism. The injection mechanism includes a liquid pump (5), a material conveying pipe (6) and a gas conveying pipe (7). The output end of the liquid pump (5) is connected to the interior of the reduction chamber (2), the input end of the liquid pump (5) is connected to the material conveying pipe (6), and the top of the reduction chamber (2) is connected to the gas conveying pipe (7).

2. The high-sulfur coal burner according to claim 1, characterized in that: A guide plate (8) is fixedly installed inside the injection port (3), and an igniter (9) is fixedly connected inside the injection port (3).

3. The high-sulfur coal burner according to claim 1, characterized in that: The reduction chamber (2) is symmetrically provided with flange structures on both sides, and the injection port (3) and one side of the main combustion chamber (1) are respectively detachably connected to the two flange structures by bolts.

4. The high-sulfur coal burner according to claim 1, characterized in that: A valve core (11) is rotatably connected to one side of the inside of the reduction chamber (2), and a rotary motor (10) is fixedly installed at the bottom of one side of the reduction chamber (2). The output end of the rotary motor (10) is fixedly connected to the bottom end of the valve core (11).

5. The high-sulfur coal burner according to claim 1, characterized in that: A drive motor (12) is fixedly installed on the top of the main combustion chamber (1), and an impeller (13) is rotatably installed inside the main combustion chamber (1). The output end of the drive motor (12) is fixedly connected to the top of the impeller (13).

6. The high-sulfur coal burner according to claim 1, characterized in that: The bottom of one side of the main combustion chamber (1) is fixedly connected to a protective net (15), which is made of iron-chromium-aluminum (FeCrAl) mesh and has a galvanized layer on the outside.

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