Anti-corrosion desulfurization accident spray device

Abstract

The utility model provides a kind of anti-corrosion desulfurization accident spraying device, comprising: liquid supply pipeline and spray pipeline;The spray pipeline one end is connected with the liquid supply pipeline, and the other end is inserted into the inlet flue;Wherein, the spray pipeline is made of high-temperature resistant resin glass steel, and the part between the liquid supply pipeline and the inlet flue on the spray pipeline is provided with buffer connecting assembly.The spray pipeline in the utility model is made of high-temperature resistant resin glass steel, which is a composite material composed of high-temperature resistant synthetic resin as matrix material and glass fiber and its products as reinforcing material, can withstand the corrosion of high sulfur content and high chloride ion in raw flue gas, and play a role in preventing flue gas corrosion.Moreover, the utility model adds a buffer connecting assembly on the spray pipeline, which can effectively prevent the glass steel spray pipeline from being broken when the pneumatic door opens and closes.

Description

Technical Field

[0001] This utility model relates to the field of flue gas treatment technology at the tail end of coal-fired power plants, and in particular to an anti-corrosion desulfurization emergency spray device. Background Technology

[0002] The desulfurization emergency spray device is located on the inlet flue of the absorption tower. Its main purpose is to prevent damage to the demister and slurry spray pipeline inside the absorption tower by high-humidity flue gas in the event of an emergency where all the slurry circulation pumps of the absorption tower lose power. Generally, the inlet temperature of the raw flue gas is 100-130℃, while the demister and fiberglass pipeline inside the absorption tower can only withstand 80-90℃. Therefore, the emergency spray is needed to spray and cool the inlet raw flue gas to protect the internal equipment of the absorption tower and ensure the safe and stable operation of the absorption tower.

[0003] The desulfurization emergency spray pipes are located at the dry-wet interface of the flue gas inlet of the absorption tower, generally 2-3 meters away from the inlet of the absorption tower. The internal spray pipes are generally made of stainless steel. Due to the high sulfur content of the raw flue gas, and the close proximity of the internal spray pipes to the absorption tower, they are in a dry-wet environment, resulting in particularly severe corrosion. The spray pipes cannot withstand the corrosion of the high sulfur and high chloride ions of the raw flue gas for a long time, causing corrosion leaks, perforations, or even breakage.

[0004] The external emergency spray header is also made of stainless steel. Because the raw flue gas leaks from the atomizing nozzles and condenses on the external spray header, cooling it down, the external pipe also suffers from the corrosive effects of the high sulfur and chloride ion content of the raw flue gas, easily leading to corrosion, perforation, and leakage. Generally, leaks in the emergency spray pipes resume after six months of operation. Furthermore, leaks in the external spray pipes cause raw flue gas to leak outside the absorber tower inlet, resulting in severe corrosion of nearby outer protective plates, platform stairs, and other structures, impacting on-site production. The leaking emergency spray pipes can only be replaced during temporary unit shutdowns for maintenance, seriously affecting the safe and stable operation of the absorber tower.

[0005] Therefore, there is a need in the field for a desulfurization emergency spray device that can prevent flue gas corrosion. Utility Model Content

[0006] This invention addresses the shortcomings of existing technologies by providing a desulfurization emergency spray device that can withstand the corrosive effects of high sulfur and high chloride ion content in raw flue gas, thereby preventing flue gas corrosion.

[0007] This utility model provides an anti-corrosion desulfurization emergency spray device, including: a liquid supply pipe and a spray pipe; one end of the spray pipe is connected to the liquid supply pipe, and the other end is inserted into the inlet flue; wherein, the spray pipe is made of high temperature resistant resin fiberglass, and a buffer connection component is provided on the part of the spray pipe located between the liquid supply pipe and the inlet flue.

[0008] Furthermore, the buffer connection assembly includes a flange and a connecting flexible joint, the connecting flexible joint being connected to the middle of the spray pipe via the flange.

[0009] Furthermore, the connecting joint is a rubber expansion joint.

[0010] Furthermore, the flange is made of high-temperature resistant resin fiberglass.

[0011] Furthermore, the liquid supply pipeline is a DN200 high-temperature resistant resin fiberglass pipeline.

[0012] Furthermore, the liquid supply pipeline is a DN200 high-temperature resistant rubber pipeline.

[0013] Furthermore, the liquid supply pipeline is a DN200 high-temperature resistant rubber-lined pipeline.

[0014] Furthermore, the spray pipe is a DN50 high-temperature resistant resin fiberglass pipe.

[0015] Furthermore, an atomizing nozzle is connected to the liquid outlet of the spray pipe.

[0016] Furthermore, the spray pipes have 10 to 15 sections.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The spray pipes in this utility model are made of high-temperature resistant resin fiberglass, a composite material composed of high-temperature resistant synthetic resin as the matrix material and glass fiber and its products as reinforcing materials. Generally, fiberglass cannot be used for extended periods at high temperatures, only below 100℃. However, this utility model uses high-temperature resistant resin fiberglass, enabling long-term operation at temperatures of 200-300℃. Our desulfurization absorption tower inlet gas temperature is below 150℃, and the fiberglass pipes made of high-humidity resistant resin fully meet the site requirements. They are also lightweight, corrosion-resistant, and relatively low-cost, able to withstand the corrosive effects of high sulfur and chloride ion content in the original flue gas, thus providing corrosion protection.

[0019] 2. This utility model addresses the problem of low strength in fiberglass reinforced plastic (FRP) pipes and the issue that pneumatic valves are commonly used at the inlets of desulfurization emergency spray systems, leading to significant water hammer during opening and closing and easily causing FRP pipe breakage. A buffer connection component is added to the spray pipe to effectively prevent the FRP spray pipe from breaking during pneumatic valve opening and closing. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of an anti-corrosion desulfurization emergency spray device according to an embodiment of the present invention.

[0022] The attached diagram is labeled as follows:

[0023] 1: Liquid supply pipeline; 2: Inlet flue; 3: Spray pipeline; 31: Flange; 32: Connecting flexible joint; 33: Atomizing nozzle. Detailed Implementation

[0024] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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 utility model.

[0026] Furthermore, 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, 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 connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] like Figure 1 As shown in the figure, this utility model embodiment provides a corrosion-resistant desulfurization emergency spray device, including a liquid supply pipe 1 and a spray pipe 3; one end of the spray pipe 3 is connected to the liquid supply pipe 1, and the other end is inserted into the inlet flue 2; wherein, the spray pipe 3 is made of high-temperature resistant resin fiberglass, and a buffer connection component is provided on the part of the spray pipe 3 located between the liquid supply pipe 1 and the inlet flue 2. In this utility model, the spray pipe 3 is made of high-temperature resistant resin fiberglass, which is a composite material composed of high-temperature resistant synthetic resin as the matrix material and glass fiber and its products as the reinforcing material. Generally, fiberglass cannot be used for a long time at high temperatures, and can only be used below 100℃, but this utility model selects high-temperature resistant resin fiberglass, so that the long-term working temperature can reach 200~300℃. The inlet temperature of our desulfurization absorption tower is below 150℃, and the fiberglass pipe made of high-humidity resin fully meets the on-site requirements, and has the characteristics of being lightweight, corrosion-resistant, and relatively low cost. It can withstand the corrosion of high sulfur content and high chloride ion content of the original flue gas, and plays a role in preventing flue gas corrosion. Furthermore, this invention addresses the problem of low strength in fiberglass pipes and the fact that pneumatic valves are commonly used at the inlets of desulfurization emergency spray systems, leading to significant water hammer during opening and closing and potentially causing the fiberglass pipes to break. A buffer connection component is added to the spray pipe 3 to effectively prevent the fiberglass spray pipe from breaking during the opening and closing of the pneumatic valve.

[0028] Preferably, the buffer connection assembly includes a flange 31 and a connecting flexible joint 32, with the connecting flexible joint 32 connected to the middle of the spray pipe 3 via the flange 31. In a specific embodiment, the connecting flexible joint 32 is a rubber expansion joint, and the flange 31 is made of high-temperature resistant resin fiberglass.

[0029] In one aspect of this utility model embodiment, the liquid supply pipe 1 can be a DN200 high-temperature resistant resin fiberglass pipe, a DN200 high-temperature resistant rubber pipe, or a DN200 high-temperature resistant rubber-lined pipe, all of which can achieve the effect of corrosion protection for the liquid supply pipe 1. The outlet of the spray pipe 3 is connected to an atomizing nozzle 33; preferably, the spray pipe 3 has 12 nozzles.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A corrosion-resistant desulfurization emergency spray device, characterized in that, include: Liquid supply pipe (1) and spray pipe (3); One end of the spray pipe (3) is connected to the liquid supply pipe (1), and the other end is inserted into the inlet flue (2); The spray pipe (3) is made of high-temperature resistant resin fiberglass, and a buffer connection component is provided on the part of the spray pipe (3) located between the liquid supply pipe (1) and the inlet flue (2).

2. The anti-corrosion desulfurization emergency spray device according to claim 1, characterized in that, The buffer connection assembly includes a flange (31) and a connecting flexible section (32), the connecting flexible section (32) being connected to the middle of the spray pipe (3) through the flange (31).

3. The anti-corrosion desulfurization emergency spray device according to claim 2, characterized in that, The connecting joint (32) is a rubber expansion joint.

4. The anti-corrosion desulfurization emergency spray device according to claim 2, characterized in that, The flange (31) is made of high-temperature resistant resin fiberglass.

5. The anti-corrosion desulfurization emergency spray device according to claim 1, characterized in that, The liquid supply pipeline (1) is a DN200 high-temperature resistant resin fiberglass pipeline.

6. The anti-corrosion desulfurization emergency spray device according to claim 1, characterized in that, The liquid supply pipe (1) is a DN200 high-temperature resistant rubber pipe.

7. The anti-corrosion desulfurization emergency spray device according to claim 1, characterized in that, The liquid supply pipeline (1) is a DN200 high-temperature resistant rubber-lined pipeline.

8. The anti-corrosion desulfurization emergency spray device according to claim 1, characterized in that, The spray pipe (3) is a DN50 high-temperature resistant resin fiberglass pipe.

9. The anti-corrosion desulfurization emergency spray device according to claim 8, characterized in that, The spray pipe (3) is connected to an atomizing nozzle (33) at its outlet.

10. The anti-corrosion desulfurization emergency spray device according to claim 9, characterized in that, The spray pipe (3) has 10 to 15 sections.

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