Ammonia desulfurization ammonium sulfate drying tail gas treatment device

Abstract

The utility model relates to the technical field of ammonia desulphurization ammonium sulfate production, in particular to an ammonia desulphurization ammonium sulfate drying tail gas treatment device which comprises an absorption tower, an absorption assembly is fixedly connected to the lower portion of the inner wall face of the absorption tower, and a spraying assembly is fixedly connected to the upper portion of the inner wall face of the absorption tower in a penetrating mode. A cyclone separation assembly is fixedly connected to the middle of the upper end of the absorption tower in a penetrating manner. According to the ammonium sulfate drying tail gas treatment device for ammonia desulfurization, tail gas is uniformly dispersed through a stainless steel grid in the absorption assembly, and meanwhile, an annular pipe of the spraying assembly is matched with a plurality of atomizing nozzles, so that absorption liquid is atomized and sprayed out from a plurality of angles, the tail gas is purified, pollutants in the tail gas are ensured to be fully treated, and the treatment effect is good. The contact area of the tail gas and the absorption liquid is greatly increased by matching with the polypropylene Pall ring packing, so that pollutants in the tail gas can be more sufficiently absorbed, and the purification efficiency is effectively improved.

Description

A tail gas treatment device for ammonium sulfate drying in ammonia desulfurization process Technical Field

[0001] This utility model relates to the field of ammonium sulfate production technology using ammonia desulfurization, and in particular to a device for treating the drying tail gas of ammonium sulfate produced using ammonia desulfurization. Background Technology

[0002] The ammonia-based desulfurization ammonium sulfate drying system is applied in the field of flue gas desulfurization. In coal-fired power plants, the flue gas produced by combustion contains a large amount of sulfur dioxide, which causes environmental problems such as acid rain. Therefore, desulfurization treatment is necessary. The post-desulfurization treatment system is a system for further processing or disposal of the products and materials after desulfurization. From the product perspective, after using the ammonia-based wet desulfurization, ammonium sulfate is generated. The ammonium sulfate drying system mainly performs solid-liquid separation and drying and packaging of the ammonium sulfate slurry to meet certain quality standards for subsequent use. During the ammonium sulfate drying process, some volatile gases and ammonium sulfate dust are generated, causing environmental pollution and harm to operators. Traditional tail gas treatment devices rely on simple spraying, which makes it difficult for pollutants in the tail gas to fully react with the absorbent liquid, resulting in the ineffective removal of harmful components in the tail gas. Therefore, we have introduced an ammonia-based desulfurization ammonium sulfate drying tail gas treatment device. Summary of the Invention

[0003] The main objective of this invention is to provide a device for treating the tail gas of ammonium sulfate drying in ammonia desulfurization, which can effectively solve the problems in the background art.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A tail gas treatment device for ammonium sulfate drying in ammonia desulfurization includes an absorption tower. A tail gas inlet pipe is fixedly connected to the lower part of the outer surface of the absorption tower. A first switching valve is movably installed on the right side of the outer surface of the tail gas inlet pipe. An absorption assembly is fixedly connected to the lower part of the inner wall of the absorption tower. A spray assembly is fixedly connected to the upper part of the inner wall of the absorption tower. A cyclone separator is fixedly connected to the middle of the upper end of the absorption tower. A liquid outlet pipe is fixedly connected to the middle of the lower end of the absorption tower. Three fixing blocks are fixedly connected to the upper part of the outer surface of the absorption tower. Each of the three fixing blocks has a through-hole at its upper end.

[0006] The absorption assembly includes a bottom frame, the inner wall of which is embedded with a stainless steel mesh grid, a connecting frame fixedly connected to the upper end of the bottom frame, the connecting frame being filled with polypropylene Pall ring packing, and the outer surfaces of the bottom frame and the connecting frame being fixedly connected to the inner wall of the absorption tower.

[0007] Preferably, the spray assembly includes an annular pipe, with a diversion pipe fixedly connected to the upper left and upper right ends of the annular pipe. The rear ends of the two diversion pipes are fixedly connected to a water inlet pipe. A second switching valve is movably installed on the front of the outer surface of the water inlet pipe. Several atomizing nozzles are fixedly installed on the inner wall of the annular pipe. The outer surface of the annular pipe is fixedly connected to the inner wall of the absorption tower.

[0008] By adopting the above technical solution: the diversion pipes at the upper left and upper right of the annular pipe evenly distribute the absorbent introduced by the inlet pipe to various parts of the annular pipe. Combined with several atomizing nozzles distributed in a circular array along the inner wall, the absorbent can spray the rising exhaust gas from multiple angles and all directions. Compared with the traditional single-point or single-side spraying method, it greatly improves the spray coverage area, ensures that the pollutants in the exhaust gas are in full contact with the absorbent, and thus improves the purification effect.

[0009] Preferably, the lower ends of both of the diversion pipes penetrate the outer surface of the absorption tower and extend into the absorption tower, and the plurality of atomizing nozzles are distributed in a ring array around the center of the ring pipe.

[0010] By adopting the above technical solution, several atomizing nozzles are arranged in a ring array around the center of the ring tube, so that each atomizing nozzle can achieve the best spraying effect in its own position, covering the upward path of the exhaust gas in the absorption tower from different directions, ensuring that the entire space inside the absorption tower can be sprayed, further ensuring that the exhaust gas and the absorption liquid are in full contact, and improving the purification efficiency.

[0011] Preferably, the cyclone separation component includes an outlet pipe and a conical rod, a cyclone separation plate is fixedly connected to the outer surface of the conical rod, a filter component is fixedly connected to the upper end of the conical rod, and the lower end of the outlet pipe is inserted and fixedly connected to the upper end of the absorption tower.

[0012] By adopting the above technical solution: after the exhaust gas enters the cyclone separation component, it makes a spiral upward motion around the cyclone separation plate on the conical rod. During the spiral upward process, the larger droplets in the exhaust gas flow down along the inner wall of the absorption tower, achieving separation from the gas. This separation method greatly reduces the burden on the subsequent filtration components and improves the overall purification efficiency.

[0013] Preferably, the outer surface of the air outlet pipe is fixedly connected to the inner wall surface of the air outlet pipe, and the vortex separation plate is configured as a structure that is wider at the bottom and narrower at the top.

[0014] By adopting the above technical solution, the cyclone separator plate is set with a structure that is wider at the bottom and narrower at the top, which optimizes the cyclone motion of the exhaust gas. When the exhaust gas enters the cyclone separator component from below, the wider lower cyclone separator plate can provide a larger contact area. As the exhaust gas flows upward, the cyclone separator plate gradually narrows, so that the exhaust gas is concentrated and filtered through the fiber filter material before being discharged.

[0015] Preferably, the filter assembly includes a base block, a plurality of fixing rods are fixedly connected to the outer surface of the base block, and a fixing frame is fixedly connected to the ends of the plurality of fixing rods away from the center of the base block. The fixing frame is filled with fiber filter material, and the lower end of the base block is fixedly connected to the upper end of the conical rod.

[0016] By adopting the above technical solution, the fiber filter material filled in the fixed frame has a rich pore structure and a large specific surface area. When the exhaust gas after preliminary treatment by the cyclone separation component passes through the fiber filter material, the tiny particles and droplets can be effectively intercepted and adsorbed by the fiber filter material. The fine filtration effect of the fiber filter material can further remove the fine impurities remaining in the exhaust gas, significantly improve the purification level of the exhaust gas, and ensure that the final exhaust gas meets the strict environmental protection standards.

[0017] Preferably, the outer surface of the fixing frame is fixedly connected to the inner wall of the air outlet pipe.

[0018] By adopting the above technical solution, if there is a gap between the fixed frame and the outlet pipe during the exhaust gas treatment process, unpurified exhaust gas can easily bypass the fiber filter material and be discharged directly, causing pollution. The fixed connection between the outer surface of the fixed frame and the inner wall of the outlet pipe ensures that only clean exhaust gas that has been fully filtered is discharged from the device, thus improving the reliability and safety of exhaust gas purification.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] In this invention, the exhaust gas is evenly dispersed by the stainless steel mesh grid in the absorption component, while the annular pipe of the spray component is equipped with multiple atomizing nozzles to atomize and spray the absorbent liquid from multiple angles to purify the exhaust gas and ensure that the pollutants in the exhaust gas are fully treated. The polypropylene Pall ring packing greatly increases the contact area between the exhaust gas and the absorbent liquid, so that the pollutants in the exhaust gas can be absorbed more fully and effectively improve the purification efficiency.

[0021] In this invention, the cyclone separation plate of the cyclone separation component is designed with a structure that is wider at the bottom and narrower at the top, so that the exhaust gas can be efficiently separated as it rises around the conical rod, separating larger droplets and particles. The subsequent filter component is supported by a fixed frame through a fixed rod and filled with fiber filter media, which can further remove tiny particles and droplets from the exhaust gas. After multiple purification processes, the exhaust gas emissions are cleaner. Attached Figure Description

[0022] Figure 1 is a schematic diagram of the overall structure of the ammonium sulfate drying tail gas treatment device for ammonia desulfurization according to this utility model.

[0023] Figure 2 is a cross-sectional view of the structure of an ammonia desulfurization ammonium sulfate drying tail gas treatment device of this utility model (the absorption tower and spray assembly are cut out).

[0024] Figure 3 is an exploded view of the absorption component of an ammonia desulfurization ammonium sulfate drying tail gas treatment device of this utility model;

[0025] Figure 4 is a schematic diagram of the spray assembly of an ammonia desulfurization ammonium sulfate drying tail gas treatment device of this utility model.

[0026] Figure 5 is a cross-sectional view of the cyclone separation component of an ammonia desulfurization ammonium sulfate drying tail gas treatment device of this utility model (the outlet pipe is cut out).

[0027] Figure 6 is an enlarged view of section A in Figure 5 of the ammonia desulfurization ammonium sulfate drying tail gas treatment device of this utility model;

[0028] Figure 7 is a schematic diagram of the filter assembly of an ammonia desulfurization ammonium sulfate drying tail gas treatment device of this utility model.

[0029] In the diagram: 1. Absorption tower; 2. Tail gas inlet pipe; 3. First switch valve; 4. Absorption assembly; 5. Spray assembly; 6. Cyclone separator assembly; 7. Liquid outlet pipe; 8. Fixing block; 9. Fixing hole; 41. Base frame; 42. Connecting frame; 43. Stainless steel mesh grid; 44. Polypropylene Pall ring packing; 51. Annular pipe; 52. Diverter pipe; 53. Water inlet pipe; 54. Second switch valve; 55. Atomizing nozzle; 61. Gas outlet pipe; 62. Conical rod; 63. Cyclone separator plate; 64. Filter assembly; 641. Base block; 642. Fixing rod; 643. Fixing frame; 644. Fiber filter media. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0031] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of this application, unless otherwise stated, "multiple" means two or more.

[0032] Example 1

[0033] A tail gas treatment device for ammonium sulfate drying in ammonia desulfurization includes an absorption tower 1. A tail gas inlet pipe 2 is fixedly connected to the lower part of the outer surface of the absorption tower 1. A first switch valve 3 is movably installed on the right side of the outer surface of the tail gas inlet pipe 2. An absorption assembly 4 is fixedly connected to the lower part of the inner wall of the absorption tower 1. A spray assembly 5 is fixedly connected to the upper part of the inner wall of the absorption tower 1. A cyclone separator 6 is fixedly connected to the middle part of the upper end of the absorption tower 1. A liquid outlet pipe 7 is fixedly connected to the middle part of the lower end of the absorption tower 1. Three fixing blocks 8 are fixedly connected to the upper part of the outer surface of the absorption tower 1. Each of the three fixing blocks 8 has a fixing hole 9 that passes through from top to bottom.

[0034] In this embodiment, the absorption assembly 4 includes a bottom frame 41, with a stainless steel mesh grid 43 embedded in the inner wall of the bottom frame 41. A connecting frame 42 is fixedly connected to the upper end of the bottom frame 41, and the connecting frame 42 is filled with polypropylene Pall ring packing 44. The outer surfaces of the bottom frame 41 and the connecting frame 42 are both fixedly connected to the inner wall of the absorption tower 1. The spray assembly 5 includes an annular pipe 51, with a diversion pipe 52 fixedly connected to the upper left and upper right ends of the annular pipe 51. The rear ends of the two diversion pipes 52 are fixedly connected to an inlet pipe 53. A second switching valve 54 is movably installed on the front of the outer surface of the inlet pipe 53. Several atomizing nozzles 55 are fixedly installed on the inner wall of the annular pipe 51. The outer surface of the annular pipe 51 is fixedly connected to the inner wall of the absorption tower 1. The lower ends of the two diversion pipes 52 penetrate the outer surface of the absorption tower 1 and extend into the absorption tower 1. Several atomizing nozzles 55 are fixedly installed on the inner wall of the annular pipe 51. The nozzles 55 are arranged in a ring array around the center of the annular tube 51; the cyclone separation assembly 6 includes an outlet pipe 61 and a conical rod 62. A cyclone separation plate 63 is fixedly connected to the outer surface of the conical rod 62, and a filter assembly 64 is fixedly connected to the upper end of the conical rod 62. The lower end of the outlet pipe 61 is inserted and fixedly connected to the upper end of the absorption tower 1; the outer surface of the outlet pipe 61 is fixedly connected to the inner wall surface of the outlet pipe 61, and the cyclone separation plate 63 is configured as a structure that is wider at the bottom and narrower at the top; the filter assembly 64 includes a base block 641, and several fixing rods 642 are fixedly connected to the outer surface of the base block 641. The ends of the several fixing rods 642 away from the center of the base block 641 are jointly fixedly connected to a fixing frame 643. The fixing frame 643 is filled with fiber filter media 644, and the lower end of the base block 641 is fixedly connected to the upper end of the conical rod 62; the outer surface of the fixing frame 643 is fixedly connected to the inner wall surface of the outlet pipe 61.

[0035] It should be noted that this utility model is a treatment device for ammonium sulfate drying tail gas in ammonia desulfurization. During use, the first switch valve 3 is opened, and the dried tail gas enters the absorption tower 1 through the tail gas inlet pipe 2. As the tail gas rises in the absorption tower 1, it first passes through the stainless steel mesh grid 43. At the same time, the second switch valve 54 is opened, and the absorbent liquid flows into the diversion pipe 52 through the water inlet pipe 53, and then into the annular pipe 51. The absorbent liquid is atomized and sprayed out through several atomizing nozzles 55 to purify the tail gas. Under the action of the polypropylene Pall ring packing 44, it fully contacts the absorbent liquid and further achieves absorption treatment. The tail gas after spray treatment continues to rise to the cyclone separation component 6. The tail gas rises around the cyclone separation plate 63 on the conical rod 62. Under the action of the cyclone separation plate 63, cyclone separation is performed, and larger droplets and particles are separated. The tail gas after cyclone separation passes through the gap between the fixed rods 642, and then through the fixed frame 643 filled with fiber filter material 644 to further remove small particles and droplets. The purified tail gas is discharged from the outlet pipe 61.

[0036] In the embodiments provided in this application, it should be understood that the disclosed systems, modules, and methods can be implemented in other ways. For example, the module embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces, or indirect coupling or communication connection between modules or units, and may be electrical, mechanical, or other forms.

[0037] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit it. This application is not limited to the exact structures described above and illustrated in the accompanying drawings, and it should not be considered that the specific implementation of this application is limited to these descriptions. For those skilled in the art, various changes and modifications made without departing from the concept of this application should be considered to fall within the protection scope of this application.

Claims

1. A device for treating the tail gas of ammonium sulfate drying in ammonia desulfurization, comprising an absorption tower (1), characterized in that: A tail gas inlet pipe (2) is fixedly connected to the lower part of the outer surface of the absorption tower (1). A first switch valve (3) is movably installed on the right side of the outer surface of the tail gas inlet pipe (2). An absorption assembly (4) is fixedly connected to the lower part of the inner wall of the absorption tower (1). A spray assembly (5) is fixedly connected to the upper part of the inner wall of the absorption tower (1). A cyclone separator assembly (6) is fixedly connected to the middle of the upper end of the absorption tower (1). A liquid outlet pipe (7) is fixedly connected to the middle of the lower end of the absorption tower (1). The upper part of the outer surface of the absorption assembly (4) is fixedly connected to three fixing blocks (8), and each of the three fixing blocks (8) has a through fixing hole (9) at the top. The absorption assembly (4) includes a bottom frame (41), the inner wall of the bottom frame (41) is embedded with a stainless steel mesh grid (43), the upper end of the bottom frame (41) is fixedly connected to a connecting frame (42), the connecting frame (42) is filled with polypropylene Pall ring packing (44), and the outer surface of the bottom frame (41) and the outer surface of the connecting frame (42) are both fixedly connected to the inner wall of the absorption tower (1).

2. The ammonium sulfate drying tail gas treatment device for ammonia desulfurization according to claim 1, characterized in that: The spray assembly (5) includes an annular pipe (51). A diversion pipe (52) is fixedly connected to the upper left and upper right ends of the annular pipe (51). A water inlet pipe (53) is fixedly connected to the rear ends of the two diversion pipes (52). A second switch valve (54) is movably installed on the front of the outer surface of the water inlet pipe (53). Several atomizing nozzles (55) are fixedly installed on the inner wall of the annular pipe (51). The outer surface of the annular pipe (51) is fixedly connected to the inner wall of the absorption tower (1).

3. The ammonium sulfate drying tail gas treatment device for ammonia desulfurization according to claim 2, characterized in that: The lower ends of the two diversion pipes (52) penetrate the outer surface of the absorption tower (1) and extend into the absorption tower (1), and a number of atomizing nozzles (55) are distributed in a ring array around the center of the annular pipe (51).

4. The ammonium sulfate drying tail gas treatment device for ammonia desulfurization according to claim 1, characterized in that: The cyclone separation component (6) includes an outlet pipe (61) and a conical rod (62). A cyclone separation plate (63) is fixedly connected to the outer surface of the conical rod (62). A filter component (64) is fixedly connected to the upper end of the conical rod (62). The lower end of the outlet pipe (61) is inserted and fixedly connected to the upper end of the absorption tower (1).

5. The ammonium sulfate drying tail gas treatment device for ammonia desulfurization according to claim 4, characterized in that: The outer surface of the air outlet pipe (61) is fixedly connected to the inner wall surface of the air outlet pipe (61), and the swirling separation plate (63) is configured as a structure that is wider at the bottom and narrower at the top.

6. The ammonium sulfate drying tail gas treatment device for ammonia desulfurization according to claim 4, characterized in that: The filter assembly (64) includes a base block (641), and a plurality of fixing rods (642) are fixedly connected to the outer surface of the base block (641). The ends of the plurality of fixing rods (642) away from the center of the base block (641) are fixedly connected to a fixing frame (643). The fixing frame (643) is filled with fiber filter media (644). The lower end of the base block (641) is fixedly connected to the upper end of the tapered rod (62).

7. The ammonium sulfate drying tail gas treatment device for ammonia desulfurization according to claim 6, characterized in that: The outer surface of the fixed frame (643) is fixedly connected to the inner wall of the air outlet pipe (61).

Images