A gas-liquid separation device applied to a single-tower double-circulation desulfurization system

Abstract

A gas-liquid separation device for a single-tower dual-circulation desulfurization system belongs to the field of flue gas purification technology. It solves the problems of complex structure, difficult installation, and high resistance in existing technologies. Key technical points: An annular collection tank is set within the spray layer of the absorption tower; several gas-liquid diversion devices are positioned above the annular collection tank; several guide plates are positioned above the gas-liquid diversion devices; the horizontal projections of the gas-liquid diversion devices and the guide plates are staggered without gaps; the gas-liquid diversion devices are connected by vertical support plates; the cross-section of the gas-liquid diversion device is "V-shaped," inclined at 5° from the middle towards the absorption tower wall; horizontally, the gas-liquid diversion device extends to the inner edge of the annular collection tank. The flue gas initially desulfurized by this invention enters the upper spray desulfurization zone, and the spray slurry is collected by this invention and sent to the AFT tower, realizing pH zoning of the single-tower dual-circulation desulfurization system; the structure is simple and easy to process and install on-site.

Description

Technical Field

[0001] This utility model relates to the field of flue gas purification technology, specifically a gas-liquid separation device applied to a single-tower dual-circulation desulfurization system. Background Technology

[0002] The single-tower dual-circulation desulfurization system is a highly efficient and flexible limestone-gypsum wet desulfurization technology. Its core principle is to achieve pH zoning of the slurry pool within an absorption tower through physical partitioning and independent slurry circulation loops, thereby absorbing SO2 and generating gypsum more efficiently.

[0003] To achieve this physical zoning, a gas-liquid separation device is needed within the absorption tower to divide it into a lower and upper section. The spray slurry from the lower section falls directly back into the absorption tower's slurry pool, operating at a low pH, and undergoes preliminary desulfurization treatment of the flue gas through circulating slurry spraying. The spray slurry from the upper section is collected by the gas-liquid separation device and sent to an external AFT tower, operating at a high pH, ​​where it undergoes fine desulfurization treatment of the flue gas through circulating slurry spraying.

[0004] Existing gas-liquid separation devices have many limitations. They require high design precision and are prone to efficiency reduction due to parameter deviations. They are also prone to scaling and clogging due to the characteristics of the slurry, which can lead to damage to the corrugated plate and further reduce separation efficiency. They are also prone to "low-temperature corrosion" in high-humidity flue gas environments. Moreover, gas-liquid separation devices generally adopt the form of a collection bowl, with a resistance of about 500 Pa. The device structure is complex, construction is difficult, and material costs are high.

[0005] Therefore, there is an urgent need to propose a gas-liquid separation device for a single-tower dual-circulation desulfurization system to solve the problems of complex structure, difficult installation, and high resistance in the existing technology. Utility Model Content

[0006] In view of the above facts, in order to solve the problems of complex structure, difficult installation and high resistance in the prior art, this utility model designs a gas-liquid separation device for a single-tower dual-circulation desulfurization system.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A gas-liquid separation device for a single-tower dual-circulation desulfurization system includes a guide plate, a gas-liquid diversion device, an annular liquid collection tank, a vertical plate support, and an external pipe joint.

[0009] The annular liquid collection tank is set inside the spray layer of the absorption tower, several gas-liquid diversion devices are set above the annular liquid collection tank, and several guide plates are set above the gas-liquid diversion devices. The horizontal projections of the gas-liquid diversion devices and the guide plates are arranged alternately without gaps.

[0010] The gas-liquid separation devices are connected by vertical plates, and the sprayed slurry collected in the annular liquid collection tank is output to the AFT tower through the external pipe joint.

[0011] The gas-liquid separation device has a "V" shaped cross section, tilted at 5° from the middle towards the wall of the absorption tower, and in the horizontal direction, the gas-liquid separation device extends to the inner ring edge of the annular liquid collection tank.

[0012] The guide plate is supported inside the absorption tower and has a triangular cross-section.

[0013] An external pipe joint is installed on the wall of the absorption tower.

[0014] Furthermore, the guide plate is 200-500mm away from the top of the gas-liquid splitter.

[0015] Furthermore: the width of the annular liquid collection tank is 300-1000mm, and the height is 200-500mm.

[0016] The beneficial effects of this utility model are as follows:

[0017] 1. The flue gas that has undergone preliminary desulfurization enters the upper area for spray desulfurization through this invention. The spray slurry is collected by this invention and sent to the AFT tower, realizing the pH zoning of the single-tower dual-circulation desulfurization system.

[0018] 2. This utility model has a simple structure, is easy to process and install on site, and uses alloy material, which saves steel consumption. Its corrosion resistance and wear resistance are superior to traditional anti-corrosion materials. At the same time, the smooth surface and structural strength of the alloy material also minimize the cost of preventing and cleaning structural blockages.

[0019] 3. The overall height of this utility model is relatively low, effectively reducing the height of the absorption tower.

[0020] 4. This utility model has low flue gas resistance, thus reducing the flue gas resistance of the absorption system.

[0021] 5. The operating resistance of this utility model is about 200-300Pa, which greatly reduces the pressure of the induced draft fan and reduces the power consumption during operation. Attached Figure Description

[0022] Figure 1 This is a front view of the cross-section of this utility model;

[0023] Figure 2 This is a left view of the cross-section of this utility model;

[0024] Figure 3 This is an AA view of the present invention;

[0025] Figure 4 This is a BB view of the present invention.

[0026] In the diagram: 1-Guide plate, 2-Gas-liquid separation device, 3-Annular liquid collection tank, 4-Vertical plate support, 5-External pipe joint. Detailed Implementation

[0027] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0028] The terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0029] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] The preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0031] Example: A gas-liquid separation device applied to a single-tower dual-circulation desulfurization system in this example includes a guide plate 1, a gas-liquid diversion device 2, an annular liquid collection tank 3, a vertical plate support 4, and an external pipe joint 5.

[0032] The annular liquid collection tank 3 is set inside the spray layer of the absorption tower, a number of gas-liquid diversion devices 2 are set above the annular liquid collection tank 3, and a number of guide plates 1 are set above the gas-liquid diversion devices 2. The horizontal projection of the gas-liquid diversion devices 2 is staggered with the guide plates without gaps.

[0033] The gas-liquid separation devices 2 are connected by vertical plate supports 4;

[0034] The gas-liquid diversion device 2 has a "V" shaped cross section, which is inclined at 5° from the middle towards the tower wall of the absorption tower. In the horizontal direction, the gas-liquid diversion device 2 extends to the inner ring edge of the annular liquid collection tank 3 so that the flue gas is divided and evenly distributed when it passes from bottom to top, and the sprayed slurry is collected in the V-shaped tank of the gas-liquid diversion device 2 when it passes from top to bottom.

[0035] The guide plate 1 is supported inside the absorption tower and has a triangular cross-section.

[0036] The absorption tower is equipped with an external pipe joint 5. The sprayed slurry collected in the annular collection tank 3 is output to the AFT tower through the external pipe joint 5 and the pipe diameter is selected to adapt to the slurry flow rate of 1-3m / s.

[0037] More specifically: the guide plate 1 is 200-500mm away from the top of the gas-liquid splitting device 2.

[0038] More specifically: the annular liquid collection tank 3 has a width of 300-1000mm and a height of 200-500mm.

[0039] More specifically: the thickness of the guide plate 1 meets the structural strength requirements. If the tower diameter is too large, a vertical plate support can be considered at the center position.

[0040] More specifically: the thickness and spacing of the vertical plate support 4 of the gas-liquid diversion device 2 are calculated based on the structural strength, and the vertical plate support 4 is slotted at the intersection with the gas-liquid diversion device 2 to ensure that the internal liquid flow of the gas-liquid diversion device 2 is unobstructed.

[0041] More specifically: the guide plate 1, gas-liquid diversion device 2, annular liquid collection tank 3, vertical plate support 4, and external pipe joint 5 are made of glass flake or SAF2205 / 2507 or DIN1.4529 or alloy of the same material, and anti-corrosion combination form is adopted as needed.

[0042] More specifically: the flue gas after preliminary desulfurization enters the gas-liquid separation device upwards, and after passing through the gas-liquid diversion device 2, the flue gas is divided and evenly distributed. It continues to flow upwards and passes through the guide plate 1, where the flue gas is further evenly distributed, forming multiple continuous and evenly distributed airflows that come into contact with the spray slurry in the upper area for desulfurization.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, 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; as long as there is no structural conflict, the features in the specific embodiments disclosed in this application can be combined with each other in any way, and will not cause the substance of the corresponding technical solutions to deviate from the scope of the technical solutions of this utility model.

[0044] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A gas-liquid separation device applied to a single-tower double-circulation desulfurization system, characterized in that, Includes a guide plate (1), a gas-liquid separation device (2), an annular liquid collection tank (3), a vertical plate support (4), and an external pipe joint (5); The annular liquid collection tank (3) is set inside the spray layer of the absorption tower. Several gas-liquid diversion devices (2) are set above the annular liquid collection tank (3). Several guide plates (1) are set above the gas-liquid diversion devices (2). The projection of the gas-liquid diversion devices (2) in the horizontal direction is staggered with the guide plates without gaps. The gas-liquid splitting devices (2) are connected by vertical support plates (4); The gas-liquid splitting device (2) has a "V" shaped cross section, which is inclined at 5° from the middle towards the wall of the absorption tower. In the horizontal direction, the gas-liquid splitting device (2) extends to the inner ring edge of the annular liquid collection tank (3). The guide plate (1) is supported inside the absorption tower and has a triangular cross-section; An external pipe joint (5) is installed on the wall of the absorption tower. The sprayed slurry collected in the annular collection tank (3) is output to the AFT tower through the external pipe joint (5) via a pipeline.

2. The gas-liquid separation device applied to a single-tower double-circulation desulfurization system according to claim 1, characterized in that, The guide plate (1) is 200-500mm away from the top of the gas-liquid separation device (2).

3. The gas-liquid separation device applied to a single-tower double-circulation desulfurization system according to claim 1, characterized in that, The annular liquid collection tank (3) has a width of 300-1000mm and a height of 200-500mm.

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