Dry desulfurization device

Abstract

The utility model discloses a dry desulfurization device in the technical field of desulfurization equipment, the dry desulfurization device comprises a desulfurization box and a desulfurization mechanism, the top of the desulfurization box is provided with a smoke exhaust pipe, a filter plate is fixed in the desulfurization box, the higher end of the filter plate is fixed to the inner wall of the desulfurization box, a gap is reserved between the lower end of the filter plate and the desulfurization box, and a partition plate is fixed to the lower end of the filter plate; a discharging channel is formed between the partition plate and the inner wall of the desulfurization box, and the bottom end of the discharging channel communicates with a discharging pipe; the bottom of the desulfurization box is communicated with a flue gas pipe; the desulfurization mechanism comprises a stock bin and an ejector, the stock bin is fixed to the box wall of the desulfurization box, the ejector is fixed to the outer wall of the desulfurization box, an air outlet of the ejector is communicated with an air guide pipe, the end, away from the ejector, of the air guide pipe penetrates through the desulfurization box and is located in the desulfurization box, and a spray head with a nozzle facing the filter plate is installed on the air guide pipe; the bottom of the stock bin communicates with a vertical pipe, and the bottom end of the vertical pipe penetrates through the air guide pipe and communicates with the interior of the air guide pipe. According to the scheme, the problem that adsorbent consumption is increased during dry desulfurization is solved.

Description

Technical Field

[0001] This utility model relates to the field of desulfurization equipment technology, specifically to a dry desulfurization device. Background Technology

[0002] Kiln flue gas refers to the high-temperature gas mixture produced when fuel is burned or materials are processed in industrial kilns (such as cement kilns, glass kilns, ceramic kilns, and metallurgical furnaces). This flue gas typically contains various components, including sulfur dioxide. Sulfur dioxide released into the air poses several health hazards. First, it harms human health. Sulfur dioxide is a colorless gas with a strong, pungent odor, readily soluble in bodily fluids and other viscous liquids. It can irritate the respiratory mucosa, causing symptoms such as difficulty breathing, coughing, and burning throat. Long-term inhalation of high concentrations of sulfur dioxide can also lead to upper respiratory tract infections, chronic bronchitis, and emphysema. Second, it damages the environment. Sulfur dioxide undergoes oxidation and chemical reactions in the atmosphere to form sulfate aerosols, which, when they fall to the ground, form acid rain. Acid rain severely corrodes lakes, groundwater, buildings, forests, soil, and ancient artifacts, damaging the ecological environment. Therefore, to reduce the health hazards and environmental damage caused by sulfur dioxide, desulfurization treatment of kiln flue gas is necessary. Current dry desulfurization methods involve spraying finely powdered adsorbent (calcium hydroxide) downwards into the high-temperature flue gas, which then flows slowly upwards. In this process, the adsorbent reacts chemically with the sulfur dioxide in the flue gas to form calcium sulfite and calcium sulfate. However, this method results in a relatively short residence time of the adsorbent in the desulfurization unit, leading to insufficient absorption of sulfur dioxide and a weak desulfurization effect. It also results in incomplete reaction of the adsorbent, increasing its consumption. Utility Model Content

[0003] The present invention aims to provide a dry desulfurization device to solve the problem of increased adsorbent consumption during dry desulfurization.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a dry desulfurization device, including a desulfurization box and a desulfurization mechanism. The top of the desulfurization box is equipped with a flue pipe. A downwardly inclined filter plate is fixedly connected inside the desulfurization box. The filter plate is used for the passage of sulfur-containing flue gas. The higher end of the filter plate is fixedly connected to the inner wall of the desulfurization box, and a gap is left between the lower end of the filter plate and the inner wall of the desulfurization box. A vertical partition is fixedly connected to the lower end of the filter plate, forming a discharge channel between the partition and the inner wall of the desulfurization box. The bottom end of the discharge channel is connected to a discharge pipe, and a switch valve is installed on the discharge pipe. The bottom of the desulfurization box is connected to a flue gas pipe, with the flue gas outlet located below the filter plate. The flue gas inlet of the flue gas pipe is connected to the tail gas pipe of the kiln.

[0005] The desulfurization mechanism includes a silo and an injector. The silo is fixedly connected to the wall of the desulfurization chamber, and the injector is fixedly connected to the outer wall of the desulfurization chamber. The outlet of the injector is connected to a gas guide pipe. The end of the gas guide pipe away from the injector passes through the desulfurization chamber and is located inside the desulfurization chamber. A nozzle with its nozzle facing the filter plate is installed on the gas guide pipe. The nozzle is used to spray the adsorbent in a mist. The bottom of the silo is connected to a vertical pipe. The bottom end of the vertical pipe passes through the gas guide pipe and communicates with the inside of the gas guide pipe. A check valve is installed at the bottom of the vertical pipe. The check valve is used to prevent the adsorbent in the vertical pipe from flowing back due to the air pressure of the injector.

[0006] The working principle of this utility model is as follows: Before use, the desulfurizing agent is added to the material box. When using, the injector is turned on, and the gas in the injector is sprayed into the desulfurization box through the air guide pipe connected to the injector. At this time, the desulfurizing agent in the material box falls into the air guide pipe through the vertical pipe under the action of gravity. It flows into the desulfurization box with the gas in the air guide pipe and is sprayed downward in a mist through the nozzle. It slowly falls from the nozzle and falls onto the filter plate. The check valve at the bottom of the vertical pipe can prevent the airflow in the air guide pipe from flowing into the material box through the vertical pipe. As the desulfurizing agent descends, flue gas enters the desulfurization chamber through the flue gas pipe and flows upward through the filter plate. As the flue gas continues to flow upward through the filter plate, it comes into contact with the sinking desulfurizing agent. The products resulting from the reaction between the desulfurizing agent and the sulfur in the flue gas fall onto the filter plate under gravity. Some of the desulfurizing agent that did not fully react with the flue gas also falls onto the filter plate. At this point, the newly emerging flue gas below the filter plate first comes into contact with the unreacted desulfurizing agent on the filter plate, undergoing a preliminary desulfurization reaction, and then flows upward to react with the remaining desulfurizing agent. After desulfurization, the flue gas continues to flow upward and is discharged from the exhaust pipe at the top of the desulfurization chamber. The desulfurizing agent products that fall onto the filter plate experience an increasing downward force as their mass increases along the inclined surface of the filter plate. When this downward force exceeds the frictional force between the desulfurizing agent products and the filter plate, the desulfurizing agent products slide down the filter plate to the bottom of the discharge channel and are discharged from the discharge pipe connected to the bottom of the discharge channel. Once the desulfurizing agent products completely cover the filter plate, the increased air pressure of the flue gas can blow the desulfurizing agent products upwards, causing them to shake and then slide downwards along the filter plate.

[0007] The beneficial effects of this utility model are:

[0008] 1. In this solution, the combination of the filter plate and the nozzle ensures that the falling desulfurizing agent and the rising flue gas come into full contact. Furthermore, the unreacted desulfurizing agent remaining on the filter plate can continue to react with the newly entering flue gas, extending the reaction time, enhancing the desulfurization effect, and thus reducing the consumption of adsorbent.

[0009] 2. The newly introduced flue gas first reacts with the desulfurizing agent that has not fully reacted on the filter plate, which reduces the sulfur content in the flue gas. When the flue gas then reacts with the desulfurizing agent sprayed from the nozzle, the desulfurization efficiency and effect of the desulfurizing agent on the flue gas are further increased because the sulfur content is reduced.

[0010] Furthermore, the bottom of the discharge channel is provided with a funnel-shaped guide plate, the bottom end of which is connected to the discharge pipe. This arrangement facilitates the collection of desulfurizing agent products in the discharge channel and their discharge from the discharge pipe.

[0011] Furthermore, multiple nozzles are installed on the air guide pipe, spaced apart above the filter plate. This arrangement allows the desulfurizing agent sprayed from the nozzles to cover the filter plate, reducing potential gaps and thus ensuring the desulfurization effect of the flue gas.

[0012] Furthermore, the exhaust end of the flue pipe is bent upwards and faces the filter plate. This arrangement allows the exhaust gas from the flue pipe to blow directly onto the filter plate, ensuring the airflow strength when the gas hits the filter plate.

[0013] Furthermore, the nozzle is an atomizing nozzle. This design allows the sprayed desulfurizing agent to be in a mist form, increasing the contact area between the desulfurizing agent and the flue gas, thus improving the desulfurization effect. Attached Figure Description

[0014] Figure 1 This is a cross-sectional view of the front view of a dry desulfurization device according to the present invention;

[0015] Figure 2 This is a cross-sectional view of the left side of a dry desulfurization device according to the present invention;

[0016] Figure 3 for Figure 1 A schematic diagram of the structure of the guide plate. Detailed Implementation

[0017] The following detailed description illustrates the specific implementation method:

[0018] The reference numerals in the accompanying drawings of the instruction manual include: 1. flue pipe, 2. desulfurization box, 3. silo, 4. vertical pipe, 5. air guide pipe, 6. injector, 7. filter plate, 8. discharge channel, 9. guide plate, 10. discharge pipe, 11. baffle plate, 12. flue gas pipe, and 13. nozzle.

[0019] The basic implementation examples are as follows: Figure 1 Appendix Figure 2 and attached Figure 3 As shown:

[0020] A dry desulfurization device includes a desulfurization chamber 2 and a desulfurization mechanism. A flue gas exhaust pipe 1 is provided at the top of the desulfurization chamber 2. A downwardly inclined filter plate 7 is fixedly connected inside the desulfurization chamber 2 for the passage of sulfur-containing flue gas. The width of the filter plate 7 is the same as the width of the interior of the desulfurization chamber 2. The higher end of the filter plate 7 is fixedly connected to the inner wall of the desulfurization chamber 2, and a gap is left between the lower end of the filter plate 7 and the inner wall of the desulfurization chamber 2. A vertical partition plate 11 is fixedly connected to the lower end of the filter plate 7, and the width of the partition plate 11 is the same as that of the filter plate. The width of the filter plate 7 is the same. A discharge channel 8 is formed between the partition plate 11 and the inner wall of the desulfurization box 2. The bottom of the discharge channel 8 is provided with a funnel-shaped guide plate 9. The bottom end of the guide plate 9 is connected to a downwardly inclined discharge pipe 10. The bottom end of the discharge pipe 10 extends out of the desulfurization box 2 and is located outside the desulfurization box 2. A switch valve is installed on the discharge pipe 10. The bottom of the desulfurization box 2 is connected to a flue gas pipe 12. The flue gas pipe 12 is bent upward and located below the filter plate 7. The flue gas pipe 12 is connected to the tail gas pipe of the kiln.

[0021] The desulfurization mechanism includes a silo 3 and an injector 6. The silo 3 is fixedly connected to the wall of the desulfurization box 2, and the injector 6 is fixedly connected to the outer wall of the desulfurization box 2. The outlet of the injector 6 is connected to a guide pipe 5. The end of the guide pipe 5 away from the injector 6 passes through the desulfurization box 2 and is located inside the desulfurization box 2. Multiple atomizing nozzles 13 are installed at intervals on the guide pipe 5, and the nozzles of the nozzles 13 face the filter plate 7. The bottom of the silo 3 is connected to a vertical pipe 4. The bottom end of the vertical pipe 4 passes through the guide pipe 5 and is connected to the inside of the guide pipe 5. A check valve is installed at the bottom of the vertical pipe 4 to prevent the adsorbent in the vertical pipe 4 from flowing back due to the air pressure of the injector 6.

[0022] The specific implementation process is as follows:

[0023] Before use, add the desulfurizing agent to the hopper. When using, turn on the injector 6. The gas in the injector 6 is sprayed into the desulfurization box 2 through the air guide pipe 5 connected to the injector 6. At this time, the desulfurizing agent in the hopper 3 falls into the air guide pipe 5 through the vertical pipe 4 under the action of gravity. It flows into the desulfurization box 2 with the gas in the air guide pipe 5 and is sprayed downward in a mist through the nozzle 13. It slowly falls from the nozzle 13 onto the filter plate 7. The check valve at the bottom of the vertical pipe 4 can prevent the airflow in the air guide pipe 5 from flowing into the hopper 3 through the vertical pipe 4. As the desulfurizing agent descends, the flue gas enters the desulfurization box 2 through the flue gas pipe 12 and flows upward through the filter plate 7. As the flue gas continues to flow upward through the filter plate 7, it comes into contact with the sinking desulfurizing agent. The products generated after the desulfurizing agent reacts with the sulfur in the flue gas fall onto the filter plate 7 under the action of gravity. Some of the desulfurizing agent that has not fully reacted after contacting the flue gas also falls onto the filter plate 7. At this time, the flue gas newly passing through the filter plate 7 first comes into contact with the desulfurizing agent that has not fully reacted on the filter plate 7, and reacts first to carry out desulfurization. Then it flows upward and comes into contact with the desulfurizing agent that is falling below to react and carry out desulfurization. After the flue gas is desulfurized, it continues to flow upward and is discharged from the exhaust pipe 1 at the top of the desulfurization box 2. As the mass of the desulfurizing agent products falling onto the filter plate 7 increases, the downward force along the inclined surface of the filter plate 7 also increases. When the downward force exceeds the frictional force between the desulfurizing agent products and the filter plate 7, the desulfurizing agent products slide down the filter plate 7 to the bottom of the discharge channel 8 and are discharged from the discharge pipe 10 connected to the bottom of the discharge channel 8. After the desulfurizing agent products completely cover the filter plate 7, the increased air pressure of the flue gas can blow the desulfurizing agent products upward, causing them to shake and then slide downward along the filter plate 7.

Claims

1. A dry desulfurization device, characterized in that: The system includes a desulfurization box and a desulfurization mechanism. The top of the desulfurization box is equipped with a flue gas exhaust pipe. A downwardly inclined filter plate is fixedly connected inside the desulfurization box for the passage of sulfur-containing flue gas. The higher end of the filter plate is fixedly connected to the inner wall of the desulfurization box, while a gap is left between the lower end of the filter plate and the inner wall. A vertical partition is fixedly connected to the lower end of the filter plate, forming a discharge channel between the partition and the inner wall of the desulfurization box. The bottom end of the discharge channel is connected to a discharge pipe, on which a switch valve is installed. The bottom of the desulfurization box is connected to a flue gas pipe, with the exhaust end of the flue gas pipe located below the filter plate. The inlet end of the flue gas pipe is connected to the tail gas pipe of the kiln. The desulfurization mechanism includes a silo and an injector. The silo is fixedly connected to the wall of the desulfurization chamber, and the injector is fixedly connected to the outer wall of the desulfurization chamber. The outlet of the injector is connected to a gas guide pipe. The end of the gas guide pipe away from the injector passes through the desulfurization chamber and is located inside the desulfurization chamber. A nozzle with its nozzle facing the filter plate is installed on the gas guide pipe. The nozzle is used to spray the adsorbent in a mist. The bottom of the silo is connected to a vertical pipe. The bottom end of the vertical pipe passes through the gas guide pipe and communicates with the inside of the gas guide pipe. A check valve is installed at the bottom of the vertical pipe. The check valve is used to prevent the adsorbent in the vertical pipe from flowing back due to the air pressure of the injector.

2. The dry desulfurization device according to claim 1, characterized in that: The bottom of the discharge channel is provided with a funnel-shaped guide plate, and the bottom end of the guide plate is connected to the discharge pipe.

3. The dry desulfurization device according to claim 2, characterized in that: The air guide pipe is equipped with multiple nozzles, which are spaced apart above the filter plate.

4. A dry desulfurization device according to claim 3, characterized in that: The exhaust end of the flue pipe is bent upwards and faces the filter plate.

5. A dry desulfurization device according to claim 4, characterized in that: The nozzle is a nozzle made of atomizing nozzle.

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