Incineration flue gas particulate matter treatment device

Abstract

The utility model discloses a kind of incineration flue gas particulate matter processing devices, comprising: tank, water storage tank and flow blocking structure;Tank is provided with air inlet and air outlet;Water storage tank is arranged in the air inlet side inside tank, and the inside of water storage tank has storage water;Flow blocking structure has several flow blocking parts, several flow blocking parts are sequentially spaced in tank inside along gas flow direction, the variable direction channel for gas meandering through is formed between each flow blocking part and tank inner wall, the side of the corresponding variable direction channel of each flow blocking part forms the particulate matter interception surface for intercepting particulate matter;The device utilizes the waste heat of flue gas to evaporate storage water, cooperate flow blocking structure to realize the purification treatment of flue gas, not only improve energy utilization efficiency, but also realize the recycling of water resources, reduce water resource consumption.

Description

Technical Field

[0001] This utility model relates to the field of incineration flue gas treatment technology, specifically to an incineration flue gas particulate matter treatment device. Background Technology

[0002] Particulate matter (such as dust and heavy metal particles) carried in flue gas poses a serious threat to the environment and human health. While traditional particulate matter treatment technologies (such as electrostatic precipitators and bag filters) have some effectiveness, they suffer from problems such as complex equipment, high operating costs, and difficult maintenance. Furthermore, the direct emission of high-temperature flue gas leads to wasted heat energy and increased energy consumption.

[0003] Some wet scrubbing devices remove particulate matter through water baths or spraying. For example, patent CN106902628A discloses a waste incineration flue gas spraying purification device, which includes a spray tower with a top air outlet and a bottom air inlet. The inner cavity of the spray tower is divided into upper and lower spraying areas, namely an upper alkaline spraying area and a lower tap water spraying area. The alkaline spraying area and the tap water spraying area are connected by a ventilation channel. A demisting device is installed at the top air outlet. The tap water spraying area uses tap water nozzles to spray tap water to wash away soot and acidic gases in the flue gas, thereby reducing the soot content in the flue gas.

[0004] However, existing spray purification devices require continuous spraying water during the dust removal process, resulting in high water consumption and high operating costs. Utility Model Content

[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose an incineration flue gas particulate matter treatment device to solve the technical problems of high water consumption and high operating costs of existing spray purification devices.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution: This utility model provides a device for treating particulate matter in incineration flue gas, including a tank, a water storage tank, and a flow-blocking structure. The tank is provided with an air inlet and an air outlet, the air inlet being used to introduce gas and the air outlet being used to discharge gas. The water storage tank is located inside the tank on one side of the air inlet, and the water storage tank contains stored water for absorbing heat from the gas. The flow-blocking structure has a plurality of flow-blocking parts, which are arranged sequentially and at intervals inside the tank along the gas flow direction. Each flow-blocking part forms a deflection channel between itself and the inner wall of the tank, allowing the gas to pass through in a tortuous manner. One side of each flow-blocking part corresponding to the deflection channel forms a particulate matter interception surface for intercepting particulate matter.

[0007] In some embodiments, the flow-blocking structure includes a first flow-blocking component and a second flow-blocking component. The first flow-blocking component has a first flow channel communicating with the air inlet, and the second flow-blocking component is spaced apart from the first flow-blocking component, with one side forming a particulate matter interception surface corresponding to the outlet of the first flow channel.

[0008] In some embodiments, the first flow-blocking assembly includes a first flow-blocking plate and a second flow-blocking plate disposed opposite to each other. The first flow-blocking plate and the second flow-blocking plate are respectively connected to both sides of the inner wall of the tank and form the first flow channel between them and the inner wall of the tank.

[0009] In some embodiments, one end of the first baffle is fixedly installed on the air inlet side of the inner wall of the tank, and the other end extends obliquely towards the middle of the tank along the gas flow direction. The second baffle is arranged side by side with the first baffle and is fixedly installed on the other side of the inner wall of the tank.

[0010] In some embodiments, the water level in the water storage tank is located above the bottom of the second baffle plate and below the air inlet.

[0011] In some embodiments, the second flow-blocking assembly includes a third flow-blocking plate, which is spaced apart on the side of the second flow-blocking plate near the air outlet and connected to the tank body, and one side of the third flow-blocking plate corresponds to the first flow channel between the first flow-blocking plate and the second flow-blocking plate.

[0012] In some embodiments, each of the several flow-blocking sections is provided with a cold water tank, and the flow-blocking section is also provided with an inlet pipe and an outlet pipe connected to the cold water tank. The inlet pipe is used to inject cooling water into the cold water tank, and the outlet pipe is used to discharge water from the cold water tank.

[0013] In some embodiments, the incineration flue gas particulate matter treatment device further includes a water level sensor and a water replenishment structure. The water level sensor is disposed in a water storage tank and is used to detect the water level in the water storage tank. The water replenishment structure is connected to the water storage tank and is used to replenish water into the water storage tank.

[0014] In some embodiments, an activated carbon module is installed between the air outlet and the flow-blocking structure.

[0015] In some embodiments, the activated carbon module includes an activated carbon plate and a mounting drawer, the mounting drawer being slidably disposed inside the tank, and the activated carbon plate being installed inside the mounting drawer.

[0016] Compared with existing technologies, the incineration flue gas particulate matter treatment device provided by this utility model, through the setting of a tank, a water storage tank, and a baffle structure, uses water stored in the water storage tank to absorb the waste heat of the flue gas and generate steam. The steam forms a water film on the surface of the baffle. When the flue gas carrying water vapor enters the reversing channel, during multiple reversing movements, the particulate matter can collide and combine with the water vapor to form larger particles, which are captured by the water film on the surface of the baffle. The captured particles are then returned to the water storage tank with the water flow. This design effectively improves energy utilization efficiency through waste heat recovery technology, not only achieving the purpose of purifying flue gas, but also realizing the recycling of water resources and the self-cleaning of the device, reducing the water consumption of traditional spray dust removal, and significantly reducing operating costs and maintenance difficulty. The design of the baffle structure in this device optimizes the gas flow path to better promote the combination of particulate matter and steam, while ensuring that the gas in the tank fully contacts the water film on the surface of the baffle, thereby improving purification efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the incineration flue gas particulate matter treatment device provided in this embodiment of the utility model; Figure 2 This is a top view of the activated carbon module of the incineration flue gas particulate matter treatment device provided in this embodiment of the utility model. Figure 3 This is a flow chart of the flue gas treatment process of the incineration flue gas particulate matter treatment device provided in this embodiment of the utility model.

[0018] Explanation of reference numerals in the attached drawings: 1. Tank body; 11. Air inlet; 12. Air outlet; 2. Water storage tank; 3. Baffle structure; 31. First baffle assembly; 311. First baffle plate; 312. Second baffle plate; 32. Second baffle assembly; 321. Third baffle plate; 4. Fan; 5. Activated carbon module; 51. Activated carbon plate; 52. Mounting drawer; 6. Water supply pipe; 7. Water supply valve; 8. Water level sensor; 9. Sewage pipe; 10. Sewage valve. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0020] To address the technical problems of high water consumption and high operating costs in spray purification devices, this utility model provides an incineration flue gas particulate matter treatment device. It utilizes the waste heat of flue gas to evaporate and store water, and, in conjunction with a baffle structure, achieves flue gas purification. This not only improves energy utilization efficiency but also realizes the recycling of water resources and reduces water consumption.

[0021] Please see Figure 1 and Figure 3 The incineration flue gas particulate matter treatment device includes a tank 1, a water storage tank 2, and a flow-blocking structure 3. The tank 1 is provided with an air inlet 11 for introducing gas and an air outlet 12 for discharging gas. The water storage tank 2 is located inside the tank 1 on one side of the air inlet 11, and the water storage tank 2 contains stored water for absorbing heat from the gas. The flow-blocking structure 3 has several flow-blocking parts, which are arranged sequentially and at intervals inside the tank 1 along the gas flow direction. Each flow-blocking part forms a deflection channel between itself and the inner wall of the tank 1, allowing the gas to pass through in a tortuous manner. Each flow-blocking part forms a particulate matter interception surface on one side of the deflection channel to intercept particulate matter.

[0022] In this device, the tank 1 is equipped with an air inlet 11 and an air outlet 12. The combustion flue gas enters the tank 1 through the air inlet 11. As it passes through the water storage tank 2, it transfers heat to the stored water. The stored water absorbs the heat from the combustion flue gas and generates steam. The steam forms a water film on the surface of the baffle section. Guided by the baffle structure 3, the flue gas flows in a tortuous manner within the tank 1. When the flue gas carrying particulate matter passes through multiple baffle sections, the particulate matter is easily captured by the water film formed on the particulate matter interception surface, thereby achieving the purpose of purifying the flue gas. Simultaneously, the baffle section design causes the gas to flow in a tortuous manner within the tank 1, prolonging the residence time of the gas within the tank 1 and increasing the contact opportunity between the particulate matter and the water film on the surface of the baffle section, further improving the purification efficiency. Finally, the water film on the particulate matter interception surface of the baffle section slides down the surface of the baffle section under the action of gravity, carrying the captured particulate matter into the water storage tank 2. Gravity-driven water return maintains cleanliness, eliminating the need for backflushing or vibration cleaning devices, thus achieving water recycling and self-cleaning functions.

[0023] Preferably, in this embodiment, the tank 1 adopts a cylindrical vertical design with a diameter of 1.5-3m and a height of 4-6m. It is made of 310S heat-resistant stainless steel with an anti-corrosion coating. The air inlet 11 is located on one side of the bottom of the tank 1 and connects to the flue gas outlet flange of the incinerator. The air outlet 12 is located at the top of the tank 1. To ensure that the flue gas can smoothly enter and be treated inside the tank 1, a corrosion-resistant centrifugal fan 4 (with an air volume selected according to 120% of the incineration flue gas volume) is installed at the top of the tank 1. The air pressure is adjusted by a frequency converter to adapt to different operating conditions. The operation of the fan 4 provides power for the flow of incineration flue gas and controls the flue gas flow rate.

[0024] In this embodiment, the flow-blocking structure 3 includes a first flow-blocking component 31 and a second flow-blocking component 32, such that the plurality of flow-blocking parts form two zigzag paths. The first flow-blocking component 31 has a first flow channel communicating with the air inlet 11. The second flow-blocking component 32 is spaced apart from the first flow-blocking component 31, with one side forming a particulate matter trapping surface corresponding to the outlet of the first flow channel. When flue gas enters, it first passes through the first flow channel of the first flow-blocking component 31. Within the first flow channel, particulate matter can fully collide with and combine with water vapor to form larger particles. Since the particulate matter trapping surface of the second flow-blocking component 32 corresponds to the outlet of the first flow channel, the particles will directly impact the particulate matter trapping surface of the second flow-blocking component 32 under the influence of flow inertia and be captured by the water film.

[0025] In some possible embodiments, the first flow-blocking assembly 31 includes a first flow-blocking plate 311 and a second flow-blocking plate 312 disposed opposite to each other, and the second flow-blocking assembly 32 includes a third flow-blocking plate 321. Each flow-blocking plate forms a flow-blocking part, and one side of each flow-blocking plate is located on the central axis of the tank 1, and the other side is welded to the inner wall of the tank 1. The particulate matter interception surface of the flow-blocking plate is formed with a rough hydrophilic layer by a micro-etching process to enhance the adhesion of the water film.

[0026] Specifically, the first baffle plate 311 and the second baffle plate 312 are welded to both sides of the inner wall of the tank 1, forming a first flow channel between them. The corresponding sides of the second baffle plate 312 and the first baffle plate 311 each form a particulate matter interception surface. The first baffle plate 311 is fixedly installed at an angle above the air inlet 11, with one end fixedly installed on one side of the air inlet 11 on the inner wall of the tank 1, and the other end extending obliquely towards the middle of the tank 1 along the gas flow direction. The second baffle plate 312 is arranged parallel to the first baffle plate 311, with its height slightly lower than that of the first baffle plate 311. Its top end is fixedly connected to the interior of the tank 1, and its bottom end extends downwards obliquely into the water storage tank 2, directly opposite the air inlet 11. This ensures that the water level in the water storage tank 2 is above the bottom of the second baffle plate 312 and below the air inlet 11, with a 20cm gap between the lower edge of the air inlet 11 and the water surface. The third baffle plate 321 is spaced apart on the side of the second baffle plate 312 near the outlet 12 and is welded to the tank body 1. It is fixed on the same side of the inner wall of the tank body 1 as the second baffle plate 312, and the bottom surface of the third baffle plate 321 forms a particulate interception surface, which corresponds to the first flow channel between the first baffle plate 311 and the second baffle plate 312.

[0027] During operation, the high-temperature flue gas entering through inlet 11 first impacts the second baffle 312 at a certain flow velocity. Some particles in the flue gas are blocked and deflected during this impact, and are also captured by the water film on the particle trapping surface of the second baffle 312. Subsequently, the flue gas continues to flow along the first channel formed between the second baffle 312 and the first baffle 311. During this flow, fine particles aggregate with water vapor to form larger particles. When the flue gas exits from the first channel, it impacts the particle trapping surface of the third baffle 321. At this point, the larger particles are captured by the water film formed on the particle trapping surface of the third baffle 321. Finally, the purified flue gas is discharged through outlet 12. The particles captured on the third baffle 321 can drip onto the particle interception surface of the second baffle 312 along with the water film on its surface, and then flow back into the water storage tank 2 along with the water film and particles on the second baffle 312, thus realizing continuous capture and automatic cleaning of particles.

[0028] Furthermore, to facilitate the formation of a water film by steam on the baffle plates, in some possible embodiments, a cold water tank is provided inside the first baffle plate 311, the second baffle plate 312, and the third baffle plate 321. Each baffle plate is also equipped with an inlet pipe and an outlet pipe connected to the cold water tank. The inlet pipe is used to inject cooling water into the cold water tank, and the outlet pipe is used to discharge water from the cold water tank. The cooling water enters the cold water tank through the inlet pipe, keeping the baffle plates at a relatively low temperature. When the steam in the tank 1 comes into contact with the lower-temperature baffle plates, it will condense on their surface to form a water film.

[0029] In some possible embodiments, the water storage tank 2 has a volume of 1.5-3m³, and is equipped with a water level sensor 8 and a water replenishment structure. The water level sensor 8 is installed inside the water storage tank 2 to detect the water level inside the water storage tank 2; the water replenishment structure is connected to the water storage tank 2 to replenish water into the water storage tank 2.

[0030] In one possible embodiment, the water replenishment structure includes a water replenishment pipe 6 and a water replenishment valve 7. The water replenishment pipe 6 is connected to the water storage tank 2 and the cold water tank inside the second baffle 312. The water replenishment valve 7 is disposed on the water replenishment pipe 6 and is used to control the opening and closing of the water replenishment pipe 6. When the water level sensor 8 detects that the water level in the water storage tank 2 is lower than the preset water level, the water replenishment valve 7 opens, and the water replenishment pipe 6 replenishes the water in the cold water tank to the water storage tank 2 to maintain a stable water level in the water storage tank 2.

[0031] Furthermore, in some possible embodiments, a coagulant aid is added to the water storage tank 2 to enhance particulate matter settling. A drain pipe 9 and a drain valve 10 are also provided at the bottom of the water storage tank 2 for discharging sediment from the tank.

[0032] Please see Figure 1In this embodiment, an activated carbon module 5 is installed between the air outlet 12 and the baffle structure 3. After the flue gas passes through the baffle structure 3 to purify the particulate matter, it needs to flow through the activated carbon module 5 to the air outlet 12. The activated carbon module 5 can further adsorb harmful gases in the flue gas and improve the purification effect.

[0033] Please see Figure 1 and Figure 2 In some possible embodiments, the activated carbon module 5 is located 30-50cm above the uppermost baffle plate. It includes an activated carbon plate 51 and an installation drawer 52. The activated carbon plate 51 is formed by 2-4 honeycomb activated carbon blocks connected in parallel, with a pore size of 3-5mm and a wall thickness of 0.5mm, ensuring both airflow permeability and providing sufficient adsorption surface. The installation drawer 52 is made of 304 stainless steel and is slidably installed inside the tank body 1. The activated carbon plate 51 is installed inside the installation drawer 52. An elastic sealing strip is provided on the edge of the sliding opening on one side of the tank body 1. When the installation drawer 52 slides into the tank body 1, it seals against the sliding opening on one side of the tank body 1, ensuring a good seal between the installation drawer 52 and the tank body 1 when closed, preventing flue gas leakage. When the activated carbon is saturated or needs replacement, the activated carbon plate 51 can be easily removed and replaced simply by sliding the installation drawer 52 out of the tank body 1.

[0034] To prevent water vapor from being carried away by the flue gas, a gas-liquid separator is installed at the outlet 12 of tank 1 to achieve gas-liquid separation. The dried flue gas after gas-liquid separation is discharged from the outlet of the gas-liquid separator.

[0035] To better understand this utility model, the following is combined with... Figures 1 to 3 The technical solution of this utility model is described in detail: Particulate matter carried during use High-temperature flue gas enters the tank 1 through the inlet 11. The water stored in the water tank 2 absorbs the heat of the high-temperature flue gas and evaporates to form steam. The steam condenses on the surface of the baffle to form a water film. As the flue gas enters the deflection channel, it undergoes multiple deflection movements under the guidance of the baffle. During this process, particulate matter in the flue gas can fully collide and combine with the water vapor to form larger particles, which can be captured by the water film on the particle interception surface of each baffle. Finally, the water accumulated on the baffle returns to the water tank 2, and the captured particulate matter also flows into the water tank 2, achieving effective removal of particulate matter.

[0036] This invention utilizes a tank 1, a water storage tank 2, and a baffle structure 3. The water storage tank 2 stores water to absorb waste heat from flue gas, generating steam. This steam forms a water film on the surface of the baffle. When the flue gas carrying the water vapor enters the deflection channel, during multiple deflections, particulate matter collides and combines with the water vapor to form larger particles, which are then captured by the water film on the baffle surface. The captured particles then return to the water storage tank 2 with the water flow. This design effectively improves energy efficiency through waste heat recovery technology, achieving not only flue gas purification but also water recycling and self-cleaning of the device. It reduces water consumption compared to traditional spray dust removal, significantly lowering operating costs and maintenance complexity. The baffle structure 3 optimizes the gas flow path, better promoting the combination of particulate matter and steam, while ensuring sufficient contact between the gas and the water film on the baffle surface within the tank 1, thus improving purification efficiency.

[0037] In the description of this application, it should be noted that the terms "upper" and "lower," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0038] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0039] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A device for treating particulate matter from incineration flue gas, characterized in that, include: The tank body is equipped with an air inlet and an air outlet; A water storage tank is located on one side of the air inlet inside the tank body, and the water storage tank contains stored water. as well as The flow-blocking structure has several flow-blocking parts, which are arranged sequentially and at intervals inside the tank along the gas flow direction. Each flow-blocking part forms a deflection channel between itself and the inner wall of the tank, allowing the gas to pass through in a tortuous manner. Each flow-blocking part forms a particulate matter interception surface on one side of the deflection channel for intercepting particulate matter. The flow-blocking structure includes a first flow-blocking component and a second flow-blocking component. The first flow-blocking component has a first flow channel communicating with the air inlet. The second flow-blocking component is spaced apart from the first flow-blocking component, and one side forms a particulate matter interception surface corresponding to the outlet of the first flow channel. The first flow-blocking assembly includes a first flow-blocking plate and a second flow-blocking plate disposed opposite to each other. The first flow-blocking plate and the second flow-blocking plate are respectively connected to both sides of the inner wall of the tank and form the first flow channel between them and the inner wall of the tank. The second flow-blocking assembly includes a third flow-blocking plate, which is spaced apart on the side of the second flow-blocking plate near the air outlet and connected to the tank body. One side of the third flow-blocking plate corresponds to the first flow channel between the first flow-blocking plate and the second flow-blocking plate.

2. The incineration flue gas particulate matter treatment device according to claim 1, characterized in that, One end of the first baffle is fixedly installed on the air inlet side of the inner wall of the tank, and the other end extends obliquely towards the middle of the tank along the gas flow direction. The second baffle is arranged side by side with the first baffle and is fixedly installed on the other side of the inner wall of the tank.

3. The incineration flue gas particulate matter treatment device according to claim 2, characterized in that, The water level in the water storage tank is located above the bottom of the second baffle plate and below the air inlet.

4. The incineration flue gas particulate matter treatment device according to claim 1, characterized in that, Each of the aforementioned baffles is provided with a cold water tank. The baffles are also provided with an inlet pipe and an outlet pipe that are connected to the cold water tank. The inlet pipe is used to inject cooling water into the cold water tank, and the outlet pipe is used to discharge water from the cold water tank.

5. The incineration flue gas particulate matter treatment device according to claim 1, characterized in that, The incineration flue gas particulate matter treatment device also includes a water level sensor and a water replenishment structure. The water level sensor is installed in the water storage tank to detect the water level in the water storage tank; the water replenishment structure is connected to the water storage tank to replenish water into the water storage tank.

6. The incineration flue gas particulate matter treatment device according to claim 1, characterized in that, An activated carbon module is installed between the air outlet and the flow-blocking structure.

7. The incineration flue gas particulate matter treatment device according to claim 6, characterized in that, The activated carbon module includes an activated carbon plate and a mounting drawer. The mounting drawer is slidably disposed inside the tank, and the activated carbon plate is installed inside the mounting drawer.

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