A device for desulfurization and dust removal and purification of kiln flue gas
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XINJIANG DEBO SHENGHENG NEW ENVIRONMENTALLY FRIENDLY BUILDING MATERIALS CO LTD
- Filing Date
- 2025-09-04
- Publication Date
- 2026-06-16
AI Technical Summary
Existing desulfurization and dust removal equipment for brick kiln flue gas is prone to backflow of absorbent liquid and blockage of pipelines when the fan stops or the flue gas pressure drops suddenly. In addition, the traditional desulfurization tower structure and spray design are inefficient, the flue gas does not react fully, and the desulfurization effect is poor.
The system employs an aeration tank and a spherical desulfurization tower design, combined with a guide pipe, an arc-shaped flue gas flow channel, and spray components. It utilizes a sealed plunger and spring structure to prevent backflow, and achieves multi-stage wet desulfurization through annular flue gas vents and atomizing nozzles, thereby enhancing the contact effect between flue gas and absorbent.
It effectively prevents backflow, increases the mixing degree and contact area between flue gas and absorbent, significantly improves desulfurization effect, prevents pipeline blockage, ensures full reaction of flue gas, and improves purification efficiency.
Smart Images
Figure CN224365364U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of flue gas treatment technology, and in particular to a desulfurization and dust removal purification device for brick kiln flue gas. Background Technology
[0002] During the clay sintering and brick-making process, brick kilns generate large amounts of flue gas containing high concentrations of dust and sulfur dioxide. If emitted directly without effective treatment, the dust will exacerbate smog, while the sulfur dioxide will form acid rain, corroding soil and buildings and harming human respiratory health. Therefore, professional desulfurization and dust removal equipment is necessary to purify the flue gas. Currently, with existing brick kiln flue gas desulfurization and dust removal equipment, when the fan stops or the flue gas pressure drops sharply, the absorbent liquid at the bottom of the desulfurization tower is prone to backflow into the upstream guide pipe, or even backflow into the brick kiln exhaust system, causing pipe blockage and fan damage. Furthermore, traditional desulfurization towers are mostly cylindrical straight-tube structures, with a fast flue gas rising speed (typically >2m / s), resulting in only 1-2 seconds of contact time with the sprayed absorbent. Some flue gas is discharged from the exhaust port before fully reacting. Additionally, the absorbent spray is mostly designed "vertically downward," with low intersection with the "vertically upward" flow direction of the flue gas, failing to achieve uniform coverage and further reducing the desulfurization effect.
[0003] Therefore, it is necessary to provide a new desulfurization and dust removal purification device for brick kiln flue gas to solve the above-mentioned technical problems. Utility Model Content
[0004] To solve the above-mentioned technical problems, this utility model provides a desulfurization and dust removal purification device for brick kiln flue gas.
[0005] The desulfurization and dust removal purification device for brick kiln flue gas provided by this utility model includes an aeration tank and a desulfurization tower. The aeration tank is equipped with a flue gas inlet pipe, and the part of the flue gas inlet pipe located inside the aeration tank is close to the bottom of the aeration tank and is fixedly installed with an aeration pipe.
[0006] The desulfurization tower has a spherical tower body and a vertically arranged guide pipe installed inside the desulfurization tower. The bottom of the guide pipe is a sealed structure. Multiple annularly distributed exhaust holes are opened near the bottom of the guide pipe. A sealing plunger with elastic connection is provided inside the guide pipe to seal the exhaust holes.
[0007] An arc-shaped cover is fixedly fitted on the guide pipe located at the spherical tower body, and the arc-shaped cover and the spherical tower body form an arc-shaped smoke exhaust channel structure. A spray component is installed on the arc-shaped cover.
[0008] The spraying component includes an annular pipe, which is fixedly mounted on an arc-shaped cover by a bracket, and multiple atomizing nozzles are fixedly mounted on the annular pipe in a ring-shaped distribution. The atomizing nozzles are inclined towards the arc-shaped exhaust channel.
[0009] Preferably, an inlet pipe is fixedly installed on the annular tube.
[0010] Preferably, a spring is fixedly installed at the bottom of the guide tube, and the other end of the spring is fixedly connected to the bottom of the sealing plunger.
[0011] Preferably, a limiting ring is fixedly fitted into the inner wall of the guide pipe above the smoke exhaust hole, and the sealing plunger abuts against the limiting ring and seals the smoke exhaust hole under the action of the spring force.
[0012] Preferably, the outer surface of the arc-shaped cover has several overflow holes that are distributed in a ring and communicate with the arc-shaped smoke exhaust channel.
[0013] Preferably, a smoke exhaust hopper is fixedly installed on the top of the aeration tank, and the smoke exhaust hopper is connected to the connection end of the guide pipe through a conduit. A drain valve A is installed on the bottom wall of the aeration tank.
[0014] Preferably, the desulfurization tower is equipped with flue gas outlets and sewage discharge valves B distributed vertically.
[0015] Preferably, the smoke inlet pipe is connected to an air guide pipe via a T-junction, and a booster fan is installed at the other end of the air guide pipe.
[0016] Compared with related technologies, the desulfurization and dust removal purification device for brick kiln flue gas provided by this utility model has the following beneficial effects:
[0017] This utility model stores ammonia water at the bottom of the desulfurization tower and connects the inlet pipe to the outlet of the ammonia water storage tank. When the flue gas after cleaning and dust removal enters the guide pipe and gathers, the air pressure pushes against the sealing plunger, causing the sealing plunger to slide down the guide pipe and compress the spring. When the sealing plunger no longer seals the exhaust hole, flue gas can enter the ammonia water, realizing the first-stage wet desulfurization. Because the multiple exhaust holes are arranged in a ring, the flue gas is dispersed into multiple bubbles that enter the ammonia water, thus greatly improving the mixing degree and contact area of the flue gas and ammonia water, resulting in a significant improvement in the flue gas desulfurization effect. Subsequently, the flue gas rises and is discharged outward along the arc-shaped exhaust channel. At this time, the atomizing nozzle is turned on to discharge atomized liquid through the arc-shaped exhaust channel, thus spraying the rising flue gas to realize the second-stage wet desulfurization. When the flue gas flow rate decreases, the air pressure in the guide pipe decreases, so the spring causes the sealing plunger to reset and reseal the exhaust hole, achieving the purpose of preventing backflow. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of a preferred embodiment of the desulfurization and dust removal purification device for brick kiln flue gas provided by this utility model.
[0019] Figure 2 for Figure 1A schematic cross-sectional view of the aeration tank shown.
[0020] Figure 3 for Figure 1 A schematic cross-sectional view of the desulfurization tower shown.
[0021] Figure 4 for Figure 3 A schematic diagram of the installation structure of the spray component on the guide pipe shown;
[0022] Figure 5 for Figure 4 The diagram shows a cross-sectional view of the guide tube.
[0023] The following are the labels in the diagram: 1. Aeration tank; 11. Flue gas inlet pipe; 111. Aeration pipe; 112. Air guide pipe; 113. Booster fan; 12. Flue gas hopper; 13. Sewage discharge valve A; 2. Desulfurization tower; 21. Spherical tower body; 21a. Arc-shaped flue gas flow channel; 22. Flue gas outlet; 23. Sewage discharge valve B; 3. Guide pipe; 3a. Flue gas outlet; 31. Limiting ring; 4. Sealing plunger; 41. Spring; 5. Arc-shaped cover; 5a. Overflow hole; 6. Spraying components; 61. Ring pipe; 62. Atomizing nozzle; 63. Liquid inlet pipe. Detailed Implementation
[0024] 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.
[0025] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.
[0026] Please see Figures 1 to 5 This utility model provides a desulfurization and dust removal purification device for brick kiln flue gas, which includes an aeration tank 1 and a desulfurization tower 2.
[0027] In the embodiments of this utility model, please refer to Figures 1 to 5 An inlet pipe 11 is installed on the aeration tank 1, and the pipe body of the inlet pipe 11 is located near the bottom of the aeration tank 1 and is fixedly installed with an aeration pipe 111. An exhaust hopper 12 is fixedly installed on the top of the aeration tank 1, and the exhaust hopper 12 is connected to the connection end of the guide pipe 3 through a conduit. A drain valve A13 is installed on the bottom wall of the aeration tank 1, and the inlet pipe 11 is connected to the air guide pipe 112 through a three-way pipe, and a booster fan 113 is installed at the other end of the air guide pipe 112.
[0028] It is worth noting that:
[0029] It should be noted that: an appropriate amount of water is stored in the aeration tank 1 (the water level is 5-8 cm close to the flue), and then the flue gas generated by the brick kiln is discharged into the flue gas inlet pipe 11 through the pipe. The flue gas is then aerated in the cleaning water of the aeration tank 1, thereby cleaning away the dust in the flue gas and cooling the flue gas at the same time. The flue gas after being cleaned of dust then enters the guide pipe 3 through the flue gas inlet pipe 12. The booster fan 113 is started to pressurize the flue gas to ensure that it can be forced into the aeration pipe 111. The connected guide pipe 112 can prevent the cleaning water of the aeration tank 1 from flowing back into the flue gas inlet pipe 11.
[0030] The drain valve A13 can discharge the dirt accumulated at the bottom of the aeration tank 1.
[0031] In the embodiments of this utility model, please refer to Figures 1 to 5 The desulfurization tower 2 is equipped with flue gas outlets 22 and sewage valves B23 distributed vertically. The tower body of the desulfurization tower 2 is provided with a spherical tower body 21, and a vertically arranged guide pipe 3 is installed inside the desulfurization tower 2. The bottom of the guide pipe 3 is a sealed structure. Multiple annular flue gas holes 3a are opened near the bottom of the guide pipe 3. A sealing plunger 4 is provided inside the guide pipe 3 for elastic connection and sealing of the flue gas holes 3a. A spring 41 is fixedly installed at the bottom of the guide pipe 3, and the other end of the spring 41 is fixedly connected to the bottom of the sealing plunger 4. A limit ring 31 is fixedly fitted into the inner wall of the guide pipe 3 above the flue gas holes 3a. Under the action of the elastic force of the spring 41, the sealing plunger 4 abuts against the limit ring 31 and seals the flue gas holes 3a.
[0032] An arc-shaped cover 5 is fixedly fitted on the guide pipe 3 located at the spherical tower body 21, and the arc-shaped cover 5 and the spherical tower body 21 form an arc-shaped smoke exhaust channel 21a structure. The outer surface of the arc-shaped cover 5 is provided with several overflow holes 5a that are distributed in a ring and communicate with each other in the arc-shaped smoke exhaust channel 21a.
[0033] A spraying component 6 is installed on the arc-shaped cover 5. The spraying component 6 includes an annular pipe 61. The annular pipe 61 is fixedly installed on the arc-shaped cover 5 by a bracket. Multiple atomizing nozzles 62 are fixedly installed on the annular pipe 61. The atomizing nozzles 62 are inclined towards the arc-shaped exhaust channel 21a. A liquid inlet pipe 63 is fixedly installed on the annular pipe 61.
[0034] It should be noted that: Ammonia water is stored at the bottom of the desulfurization tower 2, and the inlet pipe 63 is connected to the output end of the ammonia water storage tank. When the flue gas after cleaning and dust removal enters the guide pipe 3 and gathers, the air pressure presses against the sealing plunger 4, causing the sealing plunger 4 to slide down along the guide pipe 3 and compress the spring 41. If the sealing plunger 4 no longer seals the flue gas outlet 3a, flue gas can enter the ammonia water, realizing the first-stage wet desulfurization. Since the multiple flue gas outlets 3a are arranged in a ring, the flue gas is dispersed into multiple bubbles that enter the ammonia water, thus greatly improving the mixing degree and contact area of the flue gas and ammonia water, which greatly improves the flue gas desulfurization effect. Subsequently, the flue gas rises and is discharged outward along the arc-shaped flue gas outlet channel 21a. At this time, the atomizing nozzle 62 is turned on to discharge atomized liquid through the arc-shaped flue gas outlet channel 21a, thus spraying the rising flue gas to realize the second-stage wet desulfurization.
[0035] It should also be noted that when the flow rate of the flue gas decreases, the air pressure in the guide pipe 3 decreases. Therefore, the spring 41 causes the sealing plunger 4 to reset and reseal the exhaust hole 3a, thereby preventing backflow.
[0036] It is worth noting that: because the arc-shaped hood 5 is provided with an overflow hole 5a that is connected to the arc-shaped flue gas flow channel 21a, some flue gas is disturbed by the flue gas in the arc-shaped flue gas flow channel 21a through the overflow hole 5a, thereby reducing the rate at which the flue gas in the arc-shaped flue gas flow channel 21a is discharged. In conjunction with the atomizing nozzle 62 that is inclined towards the arc-shaped flue gas flow channel 21a, it is ensured that the atomized ammonia water evenly covers the flue gas in the flow channel, reducing the occurrence of "spray dead angles" and further improving the adequacy of secondary desulfurization.
[0037] In addition, the sealing plunger 4 is made of wear-resistant and corrosion-resistant fluororubber-polytetrafluoroethylene composite material (hardness Shore A70-80) to improve its wear resistance and service life. At the same time, a polyurethane wear-resistant sealing ring is added at the contact point between the sealing plunger 4 and the inner wall of the guide tube 3. A nitrile rubber sealing gasket is attached to the contact surface between the limiting ring 31 and the sealing plunger 4 to enhance the sealing effect. The surface of the sealing plunger 4 is covered with a wear-resistant and chemically corrosion-resistant sealing layer (such as polytetrafluoroethylene coating). The spring 41 is made of stainless steel or titanium alloy to improve corrosion resistance. At the same time, the surface of the spring 41 is coated with polytetrafluoroethylene (PTFE) to enhance rust prevention.
[0038] In this embodiment, in order to improve the dryness of the exhaust gas, a drying device can be added at the exhaust port 22.
[0039] The circuits and controls involved in this utility model are all existing technologies, and will not be described in detail here.
[0040] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.
Claims
1. A desulfurization and dust removal purification device for brick kiln flue gas, comprising an aeration tank (1) and a desulfurization tower (2), characterized in that: The aeration tank (1) is equipped with a smoke inlet pipe (11), and the part of the smoke inlet pipe (11) located inside the aeration tank (1) is close to the bottom of the aeration tank (1) and is fixedly installed with an aeration pipe (111). The desulfurization tower (2) has a spherical tower body (21) and a vertically arranged guide pipe (3) is installed inside the desulfurization tower (2). The bottom of the guide pipe (3) is a sealed structure. Multiple annularly distributed exhaust holes (3a) are opened near the bottom of the guide pipe (3). A sealing plunger (4) is provided inside the guide pipe (3) for elastic connection and sealing the exhaust holes (3a). An arc-shaped cover (5) is fixedly fitted on the guide pipe (3) located at the spherical tower body (21), and the arc-shaped cover (5) and the spherical tower body (21) form an arc-shaped smoke exhaust channel (21a) structure. A spray component (6) is installed on the arc-shaped cover (5). The spray component (6) includes an annular pipe (61), which is fixedly mounted on the arc-shaped cover (5) by a bracket, and a plurality of ring-shaped atomizing nozzles (62) are fixedly mounted on the annular pipe (61), which are inclined toward the arc-shaped exhaust channel (21a).
2. The desulfurization and dust removal purification device for brick kiln flue gas according to claim 1, characterized in that, An inlet pipe (63) is fixedly installed on the annular pipe (61).
3. The desulfurization and dust removal purification device for brick kiln flue gas according to claim 1, characterized in that, A spring (41) is fixedly installed at the bottom of the guide tube (3), and the other end of the spring (41) is fixedly connected to the bottom of the sealing plunger (4).
4. The desulfurization and dust removal purification device for brick kiln flue gas according to claim 3, characterized in that, The inner wall of the guide pipe (3) above the smoke exhaust hole (3a) is fixedly fitted with a limiting ring (31), and the sealing plunger (4) abuts against the limiting ring (31) and seals the smoke exhaust hole (3a) under the action of the spring (41).
5. The desulfurization and dust removal purification device for brick kiln flue gas according to claim 1, characterized in that, The outer surface of the arc-shaped cover (5) is provided with several overflow holes (5a) that are distributed in a ring and communicate with each other with the arc-shaped exhaust channel (21a).
6. The desulfurization and dust removal purification device for brick kiln flue gas according to claim 1, characterized in that, The top of the aeration tank (1) is fixedly equipped with a smoke exhaust hopper (12), and the smoke exhaust hopper (12) is connected to the connection end of the guide pipe (3) through a conduit. The bottom wall of the aeration tank (1) is equipped with a drain valve A (13).
7. The desulfurization and dust removal purification device for brick kiln flue gas according to claim 6, characterized in that, The desulfurization tower (2) is equipped with flue gas outlets (22) and drain valves B (23) distributed vertically.
8. The desulfurization and dust removal purification device for brick kiln flue gas according to claim 1, characterized in that, The smoke inlet pipe (11) is connected to the air guide pipe (112) through a three-way pipe, and a booster fan (113) is installed at the other end of the air guide pipe (112).