A multi-layer filtering boiler flue gas desulfurization device

Abstract

A multi-layer filtration boiler flue gas desulfurization device, relating to the technical field of flue gas desulfurization equipment, includes: a flow guiding channel, which is fixedly installed inside the desulfurization tower. Through the inner layer components guiding the flue gas, the movement path of the flue gas during spray treatment inside the desulfurization tower is increased by three times, ensuring that the flue gas can fully and uniformly contact and react with the spray liquid, improving the overall desulfurization and treatment effect. Simultaneously, under the action of the waste liquid discharge mechanism, the waste liquid after spray treatment can automatically flow out of the interior of the desulfurization tower, and no untreated flue gas escapes during this process. This solves the problem that when using a flue gas desulfurization device, the internal flow channel design does not adequately guide the flue gas flow, resulting in a short actual movement path for the flue gas during treatment, making it impossible to form a full and uniform contact reaction in the spray area, and causing some flue gas to easily pass through the spray area quickly, resulting in incomplete desulfurization.

Description

Technical Field

[0001] This utility model relates to the technical field of flue gas desulfurization equipment, and in particular to a multi-layer filtration boiler flue gas desulfurization device. Background Technology

[0002] Boilers, as common thermal energy equipment, mostly use coal, heavy oil, etc. as fuel. The sulfur element contained in these fuels will generate sulfur dioxide and other sulfur-containing compounds during combustion and be emitted with the flue gas. Sulfur dioxide will damage the ecological environment and human health. Therefore, boiler flue gas emissions need to be desulfurized. For example, the patent application number: CN202322266988.3 discloses a multi-layer filtration boiler flue gas desulfurization device, including a desulfurization box. A flue gas inlet pipe is inserted into one side of the outer surface of the desulfurization box. An exhaust pipe is connected to the top of the desulfurization box. The interior of the desulfurization box is equipped with a demister and a spray frame from top to bottom. A slurry tank is provided at the bottom of the desulfurization box. A water pump connected to the slurry tank is provided at the bottom of the desulfurization box. Flanges are provided at the ends of the connecting pipe and the flue gas inlet pipe. By setting up a first filter screen, a second filter screen, and a third filter screen, the exhaust gas entering the desulfurization box can have an initial filtration effect, reducing particulate matter. At the same time, the pore sizes of the first, second, and third filter screens are set from large to small, which can gradually reduce the occurrence of large particles. The setting of this device can give the desulfurization box a multi-layer filtration structure, which can reduce the entry of large particles into the desulfurization box and affect the use of desulfurization slurry.

[0003] The existing flue gas desulfurization devices mentioned above have the following disadvantages when in use: 1. When the flue gas enters the device and is sprayed, the internal flow channel design does not adequately guide the flow of the flue gas, resulting in a short actual movement path of the flue gas. This makes it impossible to form a sufficient and uniform contact reaction in the spray area. Some flue gas can easily pass through the spray area quickly, which leads to incomplete desulfurization reaction and the overall treatment effect does not meet expectations. 2. The waste liquid after spraying needs to be manually drained, and the untreated flue gas can easily escape from the draining structure during the draining process, resulting in poor stability. Utility Model Content

[0004] This utility model relates to a multi-layer filtration boiler flue gas desulfurization device, which has an outer layer component and an inner layer component. The inner layer component guides the flow of flue gas, which increases the movement path of the flue gas during spray treatment inside the desulfurization tower by three times. This ensures that the flue gas can fully and evenly contact and react with the spray liquid, improving the overall desulfurization and treatment effect. At the same time, under the action of the waste liquid discharge mechanism, the waste liquid after spray treatment can automatically flow out of the interior of the desulfurization tower, and there is no phenomenon of untreated flue gas escaping during the process. It is stable and efficient in use.

[0005] The above objectives are achieved through the following scheme: A multi-layer filtration boiler flue gas desulfurization device comprises an outer layer assembly and an inner layer assembly. The outer layer assembly includes a desulfurization tower and a spray frame, the spray frame being fixedly installed inside the desulfurization tower and connected to an external liquid supply device via a pipe. The inner layer assembly includes a flow guide channel and an air inlet pipe, the flow guide channel being fixedly installed inside the desulfurization tower and the air inlet pipe being fixedly installed in the middle of the flow guide channel. The air inlet pipe is connected to the boiler's exhaust device via another set of pipes, and a filter disc is installed inside the air inlet pipe.

[0006] The multi-layer filtration boiler flue gas desulfurization device further includes an inner layer component with a flow guide hood. The flow guide hood is fixedly installed on the top of the flow guide channel, and the top of the flow guide channel is provided with a flow guide overflow hole. The cross-sectional shape of the flow guide hood is an inverted "U" shape.

[0007] The aforementioned multi-layer filtration boiler flue gas desulfurization device has spray nozzles arranged in a ring on the top of the flow guide channel, the flow guide hood, and the desulfurization tower body.

[0008] The aforementioned multi-layer filtration boiler flue gas desulfurization device has a waste liquid discharge mechanism at the bottom of the flow guide channel. The waste liquid discharge mechanism consists of a collection channel, an overflow channel, a discharge channel, and a connecting channel. The connecting channel connects the bottom ends of the collection channel and the overflow channel, and the discharge channel connects the top end of the overflow channel.

[0009] The aforementioned multi-layer filtration boiler flue gas desulfurization device has a liquid inlet at the top of the collection channel, and the liquid inlet connects the interior of the desulfurization tower body and the collection channel.

[0010] In the aforementioned multi-layer filtration boiler flue gas desulfurization device, the height of the liquid inlet is higher than the height of the liquid discharge channel, and the height of the liquid inlet is lower than the height of the air inlet pipe. Beneficial effects

[0011] 1. This utility model improves the flow path of flue gas during spray treatment inside the desulfurization tower by three times through the inner layer component guiding the flue gas. This ensures that the flue gas can fully and evenly contact and react with the spray liquid, improving the overall desulfurization and treatment effect. At the same time, under the action of the waste liquid discharge mechanism, the waste liquid after spray treatment can automatically flow out of the interior of the desulfurization tower, and there will be no escape of untreated flue gas during this process, improving stability and practicality. Attached Figure Description

[0012] Figure 1 A schematic diagram of the structure of this utility model is shown.

[0013] Figure 2A schematic diagram of the internal structure of this utility model is shown.

[0014] Figure 3 This utility model is shown Figure 2 Enlarged structural diagram of part A in the middle.

[0015] Figure 4 This utility model is shown Figure 2 A schematic diagram of the disassembled structure.

[0016] Figure 5 This diagram shows the flow direction of the waste liquid inside the waste liquid discharge mechanism after the spraying is completed.

[0017] In the diagram: 1. Outer layer components; 101. Desulfurization tower body; 102. Spray frame; 1021. Spray nozzle; 2. Inner layer components; 201. Flow guide channel; 2011. Flow guide overflow hole; 202. Flow guide cover; 203. Air inlet pipe; 2031. Filter plate; 24. Waste liquid discharge mechanism; 241. Collection channel; 2411. Liquid inlet notch; 242. Overflow channel; 243. Liquid discharge channel; 244. Connection channel.

[0018] It should be noted that, Figure 2 The black hollow arrow in the middle indicates the direction of the boiler flue gas as it enters the desulfurization tower for treatment. Figure 5 The solid black arrow in the middle indicates the direction of the liquid when the waste liquid is discharged. Detailed Implementation

[0019] Please refer to Figures 1 to 5 This utility model proposes a multi-layer filtration boiler flue gas desulfurization device, comprising: an outer layer component 1 and an inner layer component 2; the outer layer component 1 includes a desulfurization tower body 101 and a spray frame 102, the spray frame 102 being fixedly installed inside the desulfurization tower body 101 and connected to an external liquid supply device via a pipe; the inner layer component 2 includes a flow guide channel 201 and an air inlet pipe 203, the flow guide channel 201 being fixedly installed inside the desulfurization tower body 101 and the air inlet pipe 203 being fixedly installed in the flow guide channel 201. In the middle of 01, the air inlet pipe 203 is connected to the boiler exhaust device through another set of pipes, and a filter disc 2031 is installed inside the air inlet pipe 203; the bottom of the guide channel 201 is provided with a waste liquid discharge mechanism 24, and the waste liquid discharge mechanism 24 is composed of a collection channel 241, an overflow channel 242, a discharge channel 243 and a connecting channel 244. The connecting channel 244 connects the bottom ends of the collection channel 241 and the overflow channel 242, and the discharge channel 243 connects the top end of the overflow channel 242.

[0020] The inner component 2 also includes a flow guide hood 202, which is fixedly installed on the top of the flow guide channel 201. The top of the flow guide channel 201 has a flow overflow hole 2011. The cross-sectional shape of the flow guide hood 202 is an inverted "U". The spray frame 102 has ring-shaped spray nozzles 1021 arranged on the top of the flow guide channel 201, the flow guide hood 202, and the desulfurization tower body 101. In use, the flue gas can undergo desulfurization and purification under the guidance of the outer component 1 and the inner component 2. The boiler flue gas enters the interior of the flow guide channel 201 through the inlet pipe 203, and during its entry, it is subjected to primary filtration by the filter disc 2031, filtering and purifying larger particulate impurities in the flue gas. Afterward, the flue gas enters the interior of the flow guide channel 201 and... The flue gas undergoes a first contact reaction with the spray liquid sprayed from the spray nozzle 1021 inside the guide channel 201. Subsequently, the flue gas enters the interior of the guide hood 202 through the guide overflow hole 2011 and undergoes a second contact reaction with the spray liquid sprayed from the spray nozzle 1021 inside the guide hood 202. Under the guiding effect of the guide hood 202, the flue gas enters the interior of the desulfurization tower body 101 from the bottom of the guide hood 202 and undergoes a third contact reaction with the spray liquid sprayed from the spray nozzle 1021 inside the desulfurization tower body 101. Finally, the treated flue gas is discharged from the top of the desulfurization tower body 101 for subsequent treatment and emission operations. The movement path of the flue gas inside the desulfurization tower body 101 during flue gas treatment is greatly improved, and the flue gas can fully and evenly contact and react with the spray liquid, thereby improving the overall desulfurization and treatment effect.

[0021] The collection channel 241 has a liquid inlet 2411 at its top, which connects the interior of the desulfurization tower body 101 and the collection channel 241. The height of the liquid inlet 2411 is higher than that of the discharge channel 243, but lower than that of the air inlet pipe 203. In use, the waste liquid after spraying can automatically flow out of the interior of the desulfurization tower body 101 under the action of the waste liquid discharge mechanism 24, and the waste liquid after spraying can enter the collection channel 241 through the liquid inlet 2411. Inside the 1, with the height difference between the liquid inlet 2411 and the liquid outlet 243, based on the principle of communicating vessels, when the height of the waste liquid inside the collection channel 241 is higher than the height of the liquid outlet 243, the waste liquid will be discharged from the liquid outlet 243. When the height of the waste liquid inside the collection channel 241 is lower than the height of the liquid outlet 243, the waste liquid will temporarily remain inside the collection channel 241 and the overflow channel 242, forming a water seal to prevent the escape of untreated flue gas inside the desulfurization tower body 101 and the guide channel 201, ensuring stable and flexible operation.

[0022] The working principle of this embodiment is as follows: Flue gas undergoes desulfurization and purification under the guidance of the outer component 1 and the inner component 2. Boiler flue gas enters the guide channel 201 through the inlet pipe 203, where it undergoes primary filtration by the filter disc 2031, filtering and purifying larger particles. The flue gas then enters the guide channel 201 and undergoes a first contact reaction with the spray liquid from the spray nozzles 1021 inside the guide channel 201. Next, the flue gas enters the guide hood 202 through the overflow hole 2011 and undergoes a second contact reaction with the spray liquid from the spray nozzles 1021 inside the guide hood 202. Under the guidance of the guide hood 202, the flue gas enters the desulfurization tower body 101 from the bottom of the guide hood 202 and undergoes a third contact reaction with the spray liquid from the spray nozzles 1021 inside the desulfurization tower body 101. Finally, the treated flue gas exits from the desulfurization tower body... The top of 101 is used for subsequent treatment and discharge operations. The movement path of the flue gas inside the desulfurization tower 101 during flue gas treatment is greatly improved, and the flue gas can fully and evenly contact and react with the spray liquid, improving the overall desulfurization and treatment effect. The waste liquid after spray treatment can automatically flow out of the desulfurization tower 101 under the action of the waste liquid discharge mechanism 24. After spraying, the waste liquid can enter the collection channel 241 through the liquid inlet 2411. With the height difference design between the liquid inlet 2411 and the liquid discharge channel 243, according to the principle of communicating vessels, when the height of the waste liquid inside the collection channel 241 is higher than the height of the liquid discharge channel 243, the waste liquid will be discharged from the liquid discharge channel 243. When the height of the waste liquid inside the collection channel 241 is lower than the height of the liquid discharge channel 243, the waste liquid will be temporarily stored inside the collection channel 241 and the overflow channel 242, forming a water seal to prevent the escape of untreated flue gas inside the desulfurization tower 101 and the guide channel 201.

Claims

1. A multi-layer filtration boiler flue gas desulfurization device, characterized in that: Its components include an outer layer assembly and an inner layer assembly; the outer layer assembly includes a desulfurization tower body and a spray frame, the spray frame being fixedly installed inside the desulfurization tower body and connected to an external liquid supply device via a pipe; the inner layer assembly includes a flow guide channel and an air inlet pipe, the flow guide channel being fixedly installed inside the desulfurization tower body and the air inlet pipe being fixedly installed in the middle of the flow guide channel, the air inlet pipe being connected to the boiler's exhaust device via another set of pipes, and a filter disc being installed inside the air inlet pipe.

2. The multi-layer filtration boiler flue gas desulfurization device according to claim 1, characterized in that: The inner layer component also includes a flow guide shroud, which is fixedly installed on the top of the flow guide channel, and the top of the flow guide channel is provided with a flow guide overflow hole. The cross-sectional shape of the flow guide shroud is an inverted "U" shape.

3. The multi-layer filtration boiler flue gas desulfurization device according to claim 2, characterized in that: The spray frame is equipped with a ring of spray nozzles at the top of the flow guide channel, the flow guide hood, and the desulfurization tower body.

4. The multi-layer filtration boiler flue gas desulfurization device according to claim 3, characterized in that: The bottom of the flow channel is provided with a waste liquid discharge mechanism, which consists of a collection channel, an overflow channel, a discharge channel and a connecting channel. The connecting channel connects the bottom ends of the collection channel and the overflow channel, and the discharge channel connects the top end of the overflow channel.

5. A multi-layer filtration boiler flue gas desulfurization device according to claim 4, characterized in that: The top of the collection channel is provided with a liquid inlet, which connects the interior of the desulfurization tower body and the collection channel.

6. A multi-layer filtration boiler flue gas desulfurization device according to claim 5, characterized in that: The liquid inlet notch is set at a height higher than the liquid outlet channel, and the liquid inlet notch is set at a height lower than the air inlet pipe.

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