A device for reducing particulate emission concentration

Abstract

The utility model relates to desulfurizing tower discharging technical field discloses a kind of reduce particulate matter emission concentration device, including two groups of symmetrical mist eliminator component in desulfurizing tower, each group of mist eliminator component includes mist eliminator layer and several support tubes and press strip, several support tubes are evenly arranged in the inner wall of desulfurizing tower, the outer wall of each support tube is evenly provided with several connecting blocks, connecting block is evenly arranged in the outer wall of each support tube, connecting block is provided with through-hole, press strip is arranged as U type, press strip is through the through-hole of connecting block, mist eliminator layer is clamped between press strip;When the gas with mist rises through mist eliminator layer at a certain speed, mist adheres to the surface of mist eliminator layer due to inertia and collision with mist eliminator layer, then mist forms larger droplets by diffusion, gravity settling, until the resultant force of gravity exceeds gas lifting force and liquid surface tension, droplets separate from mist eliminator layer and fall, thereby realizing gas-liquid separation, avoiding production white smoke, and further significantly reducing the particulate matter concentration in emission flue gas.

Description

Technical Field

[0001] This utility model relates to the field of desulfurization tower emission technology, specifically to a device for reducing particulate matter emission concentration. Background Technology

[0002] When the desulfurization tower in the calcination system is working, the absorbent reacts with the sulfur-containing flue gas, producing a large amount of flue gas containing water droplets, desulfurization product particles, etc. If this flue gas contains a lot of mist droplets and is directly emitted, it may cause white smoke to be emitted from the chimney. The flue gas carries pollutants, causing the particulate matter value of the online monitoring equipment at the emission outlet to be too high. This not only affects the compliance of environmental protection emissions, but also causes damage to the online monitoring equipment and affects the accuracy of monitoring data. To address these issues, we propose a device to reduce particulate matter emission concentration. Utility Model Content

[0003] The present invention aims to provide a device for reducing particulate matter emission concentration, in order to solve the problem that if the air contains a large number of mist droplets and is directly emitted, it may cause white smoke to be emitted from the chimney.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a device for reducing particulate matter emission concentration, comprising two sets of demister components symmetrically arranged in a desulfurization tower. Each set of demister components includes a demister layer, several support pipes, and pressure strips. Several support pipes are evenly arranged on the inner wall of the desulfurization tower, and several connecting blocks are evenly arranged on the outer wall of each support pipe. The connecting blocks are evenly arranged on the outer wall of each support pipe, and a through hole is opened at the end of each connecting block away from the support pipe. The pressure strips are U-shaped, and one end of each pressure strip passes through the through hole of a connecting block that is not located on the outer wall of the same support pipe in sequence. The opening of each pressure strip faces the inner wall of the desulfurization tower, and the demister layer is engaged between the pressure strips.

[0005] The beneficial effects of this solution are as follows: By installing support pipes inside the desulfurization tower to support the demister layer, connecting blocks are used to connect the pressure strips and support pipes, and the pressure strips are used to fix the demister layer. Since the rising flue gas generates an impact force, the clamping force of the pressure strips effectively resists the impact of the flue gas, preventing the demister layer from loosening or shifting. The demister layer is fixed to the pressure strips using a snap-fit ​​method, which is easier to install and replace than traditional bolt connections. When the demister layer becomes clogged or damaged due to long-term use, complex disassembly is unnecessary. This process saves maintenance time and labor costs. When gas carrying mist rises at a certain speed through the demister, the mist collides with the demister due to inertia and adheres to its surface. The mist then diffuses and settles under gravity to form larger droplets. Under the wettability of the demister, the surface tension of the liquid, and the action of capillary action, the droplets continue to grow until gravity exceeds the resultant force of the gas's upward force and the surface tension of the liquid. At this point, the droplets separate from the demister and fall, thus achieving gas-liquid separation, avoiding the production of white smoke, and significantly reducing the concentration of particulate matter in the emitted smoke.

[0006] Preferably, as an improvement, each connecting block is provided with a fixing hole, and the connecting blocks are symmetrically provided with adjustment holes that communicate with the fixing holes. The inner walls of the fixing holes and the two adjustment holes are provided with spring steel rings. The spring steel rings include a fixing part and two adjustment parts. The fixing part is located inside the fixing hole and can be engaged with the support tube. The two adjustment parts are C-shaped and are located in each adjustment hole respectively.

[0007] The beneficial effects are as follows: The adjustment part is set in a C-shape, which allows the adjustment part to expand along the opening under the action of external force. When the support pipe passes through the fixing hole and is engaged with the fixing part of the spring steel ring, the diameter of the fixing part can be increased under the action of the adjustment part. Thus, the pre-tightening force generated by its own elasticity can be used to tightly fit the outer wall of the support pipe. Even if the flue gas flow causes vibration in the desulfurization tower, it can effectively counteract the loosening trend caused by the vibration and avoid relative displacement between the connecting block and the support pipe. This ensures the positional stability of the demisting layer under force and maintains the interception efficiency of the demisting component for flue gas.

[0008] Preferably, as an improvement, a rubber pad is provided between the spring steel ring and the fixing hole and the two adjustment holes.

[0009] The beneficial effects are: the vibration of the demisting components caused by the flow of flue gas inside the desulfurization tower can be absorbed by the rubber pad, reducing the hard impact and wear between the spring steel ring and the fixing hole and the two adjustment holes.

[0010] Preferably, as an improvement, the defogging layer is made of stacked polypropylene wire mesh.

[0011] The beneficial effects are as follows: Polypropylene wire mesh has high crystallinity, low density, good strength, hardness and elasticity, strong resistance to bending fatigue, good heat resistance, melting point of 164-170℃, stable chemical properties, excellent corrosion resistance to acidic substances such as H2SO4 and HNO3, and a collection efficiency of 98%-99.8% for mist droplets with a particle size greater than 3-5μm. It can effectively remove liquid droplets entrained in flue gas and reduce particulate matter emissions.

[0012] Preferably, as an improvement, the inner wall of the desulfurization tower is provided with a standing plate, which is located between two sets of demister components, and the standing plate abuts against the end of the pressure strip away from the support pipe.

[0013] The beneficial effects are as follows: by setting up the standing plate, the gap between the two sets of demister components is filled, so that the flue gas can only be discharged from both sides of the standing plate, that is, only from below the two sets of demister components. At the same time, when it is necessary to replace the demister layer or repair parts such as pressure strips and spring steel rings, personnel can stand on the standing plate without the need for external scaffolding or temporary platforms, and can more easily reach all parts of the two sets of demister components. This greatly shortens the preparation time and operation difficulty during maintenance, and reduces the impact of the maintenance process on the normal operation of the desulfurization tower.

[0014] Preferably, as an improvement, polypropylene wire mesh is provided in the gap between the demister assembly and the inner wall of the desulfurization tower, and in the gap between the standing plate and the demister assembly.

[0015] Preferably, as an improvement, a groove is provided in the middle of the end of the pressure strip near the fixing hole, and an abutment groove communicating with the fixing hole is provided in the connecting block. An abutment block is slidably provided in the abutment groove, and the abutment block can extend into the fixing hole and abut against the rubber ring. A lifting groove is provided between the abutment groove and the through hole. A lifting block is provided at the end of the abutment block near the lifting groove, and the lifting block is slidably installed in the lifting groove. A tension spring is provided on the inner wall of the abutment block and the abutment groove, and the tension spring is sleeved on the outer wall of the lifting block. A roller is rotatably installed at the end of the lifting block near the pressure strip, and the roller slides between the grooves.

[0016] Because the support pipe is prone to bumps and knocks during transportation, resulting in differences in pipe diameter, the expanded fixing part of the support pipe cannot fit tightly against the rubber pad after it is inserted into the fixing part of the spring steel ring. This causes the support pipe to shake within the fixing hole. When the desulfurization tower is working, the demister assembly vibrates and produces abnormal noise under the impact of flue gas. In some cases, the vibration can even cause friction and wear between the demister layer and the inner wall of the desulfurization tower, allowing flue gas to escape from the wear gaps in the demister layer. In this solution, a sliding groove is opened at the upper end of the pressure strip. When the pressure strip is inserted into the through hole, the lifting block rises under the action of the roller and the inclined groove at its lower end. This causes the lifting block to move the abutment block along the lifting groove into the fixing hole, thereby pushing the rubber pad to fit against the spring steel ring and providing additional support force to the spring steel ring. This reduces the gap between the spring steel ring and the fixing hole, preventing the support pipe from vibrating under the impact of airflow.

[0017] Preferably, as an improvement, the inner wall of the slide is symmetrically provided with several locking grooves, and the outer wall of the lifting block is symmetrically provided with grooves. Each groove is provided with locking teeth, and the locking teeth and the inner wall of the groove are provided with springs, so that the locking teeth can engage with the locking grooves.

[0018] The beneficial effects are as follows: by setting locking teeth on the outer wall of the lifting block, and using a spring to allow the locking teeth to extend out of the groove and abut against the locking groove on the outer wall of the pressure bar, when the pressure bar is inserted into the through hole, the inner wall of the slide groove squeezes the locking teeth. At this time, the spring is compressed, causing the locking teeth to retract into the groove. As the pressure bar continues to move, when the locking groove on the inner wall of the slide groove is opposite to the locking teeth, the spring pushes the locking teeth to abut against the locking groove, thus preventing the pressure bar from retracting during the insertion of the through hole. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the desulfurization tower and demister assembly in Embodiment 1 of this utility model; Figure 2 This is a three-dimensional structural diagram of the connecting block in Embodiment 1 of this utility model; Figure 3 This is a three-dimensional structural diagram of the desulfurization tower and the standing plate in Embodiment 1 of this utility model; Figure 4 This is a three-dimensional structural diagram of the connecting block and pressure strip in Embodiment 2 of this utility model; Figure 5 for Figure 4 A magnified schematic diagram of the structure at point A in the middle. Detailed Implementation

[0020] The following detailed description illustrates the specific implementation method: The reference numerals in the accompanying drawings include: support pipe 1, pressure strip 2, connecting block 3, fixing hole 4, adjusting hole 5, rubber pad 6, spring steel ring 7, fixing part 8, adjusting part 9, through hole 10, demisting layer 11, standing plate 12, sliding groove 13, inclined groove 14, abutting groove 15, abutting block 16, lifting groove 17, lifting block 18, tension spring 19, roller 20, locking groove 21, groove 22, locking tooth 23, spring 24, desulfurization tower 25.

[0021] Example 1 Example 1 is basically as shown in the appendix. Figures 1-3 As shown, Figure 1 The illustrated device for reducing particulate matter emission concentration includes two sets of demister components symmetrically arranged within a desulfurization tower 25. Each set of demister components includes a demister layer 11, several support pipes 1, and pressure strips 2. In this embodiment, there are three support pipes 1 and four pressure strips 2. The support pipes 1 are uniformly and fixedly installed on the inner wall of the desulfurization tower 25 by welding. Several connecting blocks 3 are uniformly provided on the outer wall of each support pipe 1. In this embodiment, four connecting blocks 3 are uniformly and fixedly installed on the outer wall of each support pipe 1. Figure 2 Each connecting block 3 shown has a through-hole 4 at its front end. The through-hole 4 is circular and its diameter is larger than that of the support tube 1. Symmetrically, each connecting block 3 has an adjustment hole 5 communicating with the through-hole 4. Both adjustment holes 5 are Ω-shaped. A rubber pad 6 is fixedly installed on the inner walls of the through-hole 4 and the two adjustment holes 5. A spring steel ring 7 is snapped into the rubber pad 6. The spring steel ring 7 includes an integrally formed fixing part 8 and two adjustment parts 9. The fixing part 8 is located inside the fixing hole 4 and can snap into the support tube 1. The two adjustment parts 9 are C-shaped and match the adjustment holes 5. Located within each adjustment hole 5, the diameter of the fixing part 8 not inserted into the support tube 1 is smaller than the diameter of the support tube 1. When the support tube 1 is inserted into the fixing part 8, the diameter of the fixing part 8 increases until it is equal to the diameter of the support tube 1 through the expansion of the two adjustment parts 9. At this time, the adjustment parts 9 are in an expanded state, so that the fixing part 8 can continuously provide clamping force to the support tube 1. When the support tube 1 and the fixing part 8 are engaged, the expanded fixing part 8 abuts against the rubber pad 6, thereby abutting against the inner wall of the fixing hole 4, preventing the support tube 1 from shaking in the fixing hole 4. Each connecting block 3 has a through hole 10 at its right end. Figure 1The pressure strip 2 shown is U-shaped by bending. The upper end of each pressure strip 2 passes through the through hole 10 of the connecting block 3 which is not located on the same support pipe 1. Adjacent pressure strips 2 are parallel to each other, and the openings of each pressure strip 2 face the inner wall of the desulfurization tower 25. The demisting layer 11 is snapped between the pressure strips 2. The demisting layer 11 is made of stacked polypropylene wire mesh. Polypropylene wire mesh has high crystallinity, low density, good strength, hardness and elasticity. It has strong resistance to bending fatigue, good heat resistance, melting point of 164-170℃, stable chemical properties, and excellent corrosion resistance to acidic substances such as H2SO4 and HNO3. It has a collection efficiency of 98%-99.8% for mist droplets with a particle size greater than 3-5μm, which can effectively remove liquid droplets entrained in flue gas and reduce particulate matter emissions.

[0022] like Figure 3 The desulfurization tower 25 shown has a standing plate 12 fixedly installed on its inner wall by welding. The standing plate 12 is located between two sets of demister components, and the upper end of the standing plate 12 abuts against the lower end of the pressure strip 2. The gaps between the demister components and the inner wall of the desulfurization tower 25, and the gaps between the standing plate 12 and the demister components, are filled with snap-fit ​​polypropylene wire mesh. By setting up the standing plate 12 and filling the gaps between the standing plate 12 and the demister components with polypropylene wire mesh, the flue gas can only be discharged from both sides of the standing plate 12, that is, only from below the two sets of demister components. At the same time, when it is necessary to replace the demister layer 11 or repair the pressure strip 2, connecting block 3 and other components, personnel can stand on the standing plate 12 without the need for external scaffolding or temporary platform construction. This allows for easier access to all parts of the two sets of demister components, greatly shortening the preparation time and operation difficulty during maintenance, and reducing the impact of maintenance on the normal operation of the desulfurization tower 25.

[0023] The specific implementation process is as follows: During installation, the standing plate 12 is fixed to the inner wall of the desulfurization tower 25 by welding. Then, each connecting block 3 is installed through the corresponding support pipe 1 on the outer wall. Subsequently, each support pipe 1 is evenly welded to the inner wall of the desulfurization tower 25. Then, the pressure strip 2 is inserted into the through hole 10 of each connecting block 3 in sequence. Finally, the demisting layer 11 is snapped into the middle of the pressure strip 2, and the gap between the demisting component and the inner wall of the desulfurization tower 25 and the gap between the standing plate 12 and the demisting component are filled with polypropylene wire mesh, so that the flue gas can only pass through the demisting component before being discharged from the desulfurization tower 25.

[0024] The demister layer 11 is supported by a support pipe 1 installed inside the desulfurization tower 25. A connecting block 3 connects the pressure strip 2 and the support pipe 1. The pressure strip 2 is used to fix the demister layer 11. Since the rising flue gas generates an impact force, the clamping force of the pressure strip 2 fixes the demister layer 11, effectively resisting the impact of the flue gas and preventing loosening or displacement. The demister layer 11 is fixed to the pressure strips 2 using a snap-fit ​​method, which is easier to install and replace than traditional bolt connections. When the demister layer 11 becomes clogged or damaged due to long-term use, complex disassembly is unnecessary. This process saves maintenance time and labor costs. When gas carrying mist rises at a certain speed through the demister layer 11, the mist collides with the demister layer 11 due to inertia and adheres to its surface. The mist then diffuses and settles due to gravity to form larger droplets. Under the action of the wettability of the demister layer 11, the surface tension of the liquid, and capillary action, the droplets continue to grow until the gravity exceeds the resultant force of the gas rising force and the surface tension of the liquid. At this point, the droplets separate from the demister layer 11 and fall, thereby achieving gas-liquid separation, avoiding the production of white smoke, and significantly reducing the concentration of particulate matter in the emitted smoke.

[0025] Example 2 Example 2 is largely the same in principle as Example 1, the difference being: Figure 4 The pressure strip 2 shown has a groove 13 at the middle of its upper end, and a slanted groove 14 at the left end of the groove 13. The connecting block 3 has an abutment groove 15 communicating with the fixing hole 4. An abutment block 16 is slidably installed in the abutment groove 15. The upper end of the abutment block 16 is arc-shaped, allowing it to extend into the fixing hole 4 and abut against the rubber ring. A lifting groove 17 is formed at the lower end of the abutment groove 15 and the upper end of the through hole 10. A lifting block 18 is fixedly installed at the lower end of the abutment block 16, and the lifting block 18 can slide up and down within the lifting groove 17. A tension spring 19 is fixedly installed between the lower end of the abutment block 16 and the inner wall of the abutment groove 15, and the tension spring 19 is sleeved on the outer wall of the lifting block 18. A roller 20 is rotatably installed at the middle of the lower end of the lifting block 18, and the roller 20 slides between the grooves 13. Figure 5The sliding groove 13 shown has several locking grooves 21 symmetrically formed on its front and rear inner walls. The lifting block 18 has grooves 22 symmetrically formed on its front and rear outer walls. Locking teeth 23 are fixedly installed on the right wall of each groove 22. One end of the locking tooth 23 extending out of the groove 22 is integrally formed with a triangular prism, and the triangular prism of the locking tooth 23 can engage with the locking groove 21. A spring 24 is fixedly installed between the rear end of the locking tooth 23 and the inner wall of the groove 22. By setting the locking teeth 23 on the outer wall of the lifting block 18 and using the spring 24, a locking mechanism is achieved. 4. This allows the locking tooth 23 to extend out of the groove 22 and abut against the locking groove 21 on the outer wall of the pressure strip 2. When the pressure strip 2 is inserted into the through hole 10, the inner wall of the slide groove 13 squeezes the locking tooth 23. At this time, the spring 24 is compressed, causing the locking tooth 23 to retract into the groove 22. As the pressure strip 2 continues to move, when the locking groove 21 on the inner wall of the slide groove 13 is opposite to the locking tooth 23, the spring 24 pushes the locking tooth 23 to abut against the locking groove 21, preventing the pressure strip 2 from retracting during the insertion of the through hole 10.

[0026] Because the support pipe is prone to bumps and knocks during transportation, resulting in differences in pipe diameter, the expanded fixing part of the support pipe cannot fit tightly against the rubber pad after it is inserted into the fixing part of the spring steel ring. This causes the support pipe to shake within the fixing hole. When the desulfurization tower is working, the demister assembly vibrates and produces abnormal noise under the impact of flue gas. In some cases, the vibration can even cause friction and wear between the demister layer and the inner wall of the desulfurization tower, allowing flue gas to escape from the wear gaps in the demister layer. In this solution, a sliding groove is opened at the upper end of the pressure strip. When the pressure strip is inserted into the through hole, the lifting block rises under the action of the roller and the inclined groove at its lower end. This causes the lifting block to move the abutment block along the lifting groove into the fixing hole, thereby pushing the rubber pad to fit against the spring steel ring and providing additional support force to the spring steel ring. This reduces the gap between the spring steel ring and the fixing hole, preventing the support pipe from vibrating under the impact of airflow.

[0027] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A device for reducing particulate matter emission concentration, characterized in that: It includes two sets of demister components symmetrically arranged inside the desulfurization tower. Each set of demister components includes a demister layer, several support pipes, and pressure strips. Several support pipes are evenly arranged on the inner wall of the desulfurization tower, and several connecting blocks are evenly arranged on the outer wall of each support pipe. Each connecting block has a through hole at the end away from the support pipe. The pressure strips are U-shaped, and one end of each pressure strip passes through the through hole of a connecting block that is not located on the outer wall of the same support pipe. The opening of each pressure strip faces the inner wall of the desulfurization tower. The demister layer is snapped between the pressure strips.

2. The device for reducing particulate matter emission concentration according to claim 1, characterized in that: Each connecting block is provided with a fixing hole, and the connecting blocks are symmetrically provided with adjustment holes that communicate with the fixing holes. The inner walls of the fixing holes and the two adjustment holes are provided with spring steel rings. The spring steel rings include a fixing part and two adjustment parts. The fixing part is located inside the fixing hole and can be engaged with the support tube. The two adjustment parts are C-shaped and are located in the respective adjustment holes.

3. The device for reducing particulate matter emission concentration according to claim 2, characterized in that: A rubber pad is provided between the spring steel ring and the fixing hole and the two adjustment holes.

4. The device for reducing particulate matter emission concentration according to claim 3, characterized in that: The defogging layer is made of stacked polypropylene wire mesh.

5. The device for reducing particulate matter emission concentration according to claim 4, characterized in that: The inner wall of the desulfurization tower is equipped with a standing plate, which is located between two sets of demister components and abuts against the end of the pressure strip away from the support pipe.

6. The device for reducing particulate matter emission concentration according to claim 5, characterized in that: Polypropylene wire mesh is installed in the gaps between the demister assembly and the inner wall of the desulfurization tower, as well as in the gaps between the standing plate and the demister assembly.

7. The device for reducing particulate matter emission concentration according to claim 6, characterized in that: A groove is provided in the middle of the end of the pressure strip near the fixing hole, and an inclined groove is provided at the end of the groove near the opening of the pressure strip. An abutment groove communicating with the fixing hole is provided in the connecting block. An abutment block is slidably provided in the abutment groove. The abutment block can extend into the fixing hole and abut against the rubber ring. A lifting groove is provided between the abutment groove and the through hole. A lifting block is provided at the end of the abutment block near the lifting groove, and the lifting block is slidably installed in the lifting groove. A tension spring is provided on the inner wall of the abutment block and the abutment groove, and the tension spring is sleeved on the outer wall of the lifting block. A roller is rotatably installed at the end of the lifting block near the pressure strip, and the roller slides between the grooves.

8. The device for reducing particulate matter emission concentration according to claim 7, characterized in that: The inner wall of the slide is symmetrically provided with several locking grooves, and the outer wall of the lifting block is symmetrically provided with grooves. Each groove is provided with locking teeth, and the locking teeth and the inner wall of the groove are provided with springs. The locking teeth can engage with the locking grooves.

Images