A forced draft degassing column which prevents ice formation at the inlet

Abstract

The utility model relates to a kind of forced ventilation degassing tower capable of preventing entrance icing, including shell, fan and anti-icing device, wherein, shell is provided with air inlet and suction port, fan is set in suction port out, for the air outside shell is entered into shell by air inlet, anti-icing device includes steam pipe group, steam pipe group has import and export, import is communicated with low-pressure steam pipeline, export is connected with trap on drain line, drain is discharged into shell, anti-icing device is set in air inlet, for heating around air inlet.The utility model is by being provided with anti-icing device at the air inlet of degassing tower shell, when ambient temperature is lower, the heat of low-pressure steam emission in steam pipe group heats the air near air inlet, to prevent icing at air inlet, ensure that external air can smoothly enter degassing tower, remove chlorine in degassing tower water, to ensure that circulating water index meets the standard, ensure that realize near zero pollution.

Description

Technical Field

[0001] This utility model relates to the technical field of forced ventilation degassing towers, and in particular to a forced ventilation degassing tower that can prevent inlet icing. Background Technology

[0002] CCPP (Combined Cycle Power Plant) systems often use open-loop circulating cooling water systems, relying on hyperbolic cooling towers to lower the circulating water temperature. To achieve circulating water quality standards and near-zero emissions, CCPP systems incorporate a comprehensive circulating water utilization system.

[0003] The circulating water comprehensive utilization system effectively removes impurities such as calcium ions, magnesium ions, and chloride ions from the water by installing ion micro-aggregating rings, an electrolytic adsorption system, and equipment such as membrane tanks, degassing towers, and sludge tanks on the main circulating water pipeline. Among them, the degassing tower is a crucial piece of equipment in this project; its proper functioning directly affects the concentration of chloride ions in the circulating water, which in turn determines whether the water quality meets standards and whether wastewater discharge is necessary.

[0004] In existing degassing towers, water filtered by a dynamic membrane passes through an inlet pipe to various branch pipes at the top. From these branch pipes, water is sprayed down from nozzles. An axial flow fan at the top of the tower draws in outside air through the air inlet at the bottom. This air carries away the dissolved chlorine in the water, achieving degassing. However, when the ambient temperature is low, the degassing tower inlet freezes, preventing outside air from entering and hindering the removal of chlorine from the water. This affects the compliance of circulating water indicators and prevents near-zero wastewater discharge from being achieved. Utility Model Content

[0005] To address the aforementioned technical problems, this application provides a forced ventilation degassing tower that can prevent inlet icing.

[0006] The forced ventilation degassing tower that prevents inlet icing provided by this utility model adopts the following technical solution:

[0007] A forced-ventilation degassing tower for preventing inlet icing includes a shell, a fan, and an anti-icing device. The shell has an air inlet and an air outlet. The fan is located at the air outlet and draws air from outside the shell into the shell through the air inlet. The anti-icing device includes a steam pipe assembly with an inlet and an outlet. The inlet is connected to a low-pressure steam pipe, and the outlet is connected to a drainage pipe. The anti-icing device is located at the air inlet and is used to heat the area around the air inlet.

[0008] Optionally, the steam pipe assembly includes multiple horizontal pipes, a first vertical pipe, and a second vertical pipe; one end of the multiple horizontal pipes is connected to the first vertical pipe, and the other end is connected to the second vertical pipe; the inlet is located on the first vertical pipe, and the outlet is located on the second vertical pipe.

[0009] Optionally, the axes of the plurality of horizontal tubes, the first vertical tube, and the second vertical tube are located in the same plane; the axes of the plurality of horizontal tubes are parallel to each other, and the first vertical tube and the second vertical tube are parallel; the horizontal tubes are evenly spaced between the first vertical tube and the second vertical tube.

[0010] Optionally, the outer casing is rectangular, and the air extraction port is located at the top of the outer casing; the air inlets are distributed on both the front and rear sides of the outer casing.

[0011] Optionally, the air inlet includes multiple branch ports, the number of which is the same as the number of horizontal pipes and corresponds one-to-one; each branch port is a rectangular opening, the length of which is parallel to the axial direction of the horizontal pipe; each horizontal pipe is arranged at its corresponding branch port.

[0012] Optionally, a condensate trap is provided on the drainage pipe, and the condensate drained by the condensate trap is discharged into the housing.

[0013] As described above, the forced ventilation degassing tower of this invention, which prevents inlet icing, has at least the following beneficial effects:

[0014] This invention relates to a forced ventilation degassing tower that prevents inlet icing. By installing an anti-icing device at the air inlet of the degassing tower shell, when the ambient temperature is low, the heat emitted by the low-pressure steam in the steam pipe group heats the air near the air inlet, thereby preventing icing at the air inlet and ensuring that outside air can smoothly enter the degassing tower to remove chlorine from the degassing tower water. This ensures that the circulating water indicators meet the standards and achieves near-zero sewage discharge. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a forced ventilation degassing tower that prevents icing at the inlet.

[0016] Figure 2 This is a schematic diagram of the specific structure of the anti-icing device and the air inlet.

[0017] Reference numerals: 1. Outer shell; 2. Fan; 3. Anti-icing device; 31. Inlet; 32. Outlet; 33. Horizontal pipe; 34. First longitudinal pipe; 35. Second longitudinal pipe; 4. Air inlet; 41. Split port; 5. Exhaust port; 6. Low-pressure steam pipe; 7. Drainage pipe; 8. Discharge pipe; 9. Steam trap; 10. Nozzle; 11. Valve. Detailed Implementation

[0018] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. It should also be understood that the terminology used in the embodiments of this utility model is for describing specific implementation schemes and not for limiting the scope of protection of this utility model. Test methods in the following embodiments that do not specify specific conditions are generally performed under conventional conditions or according to the conditions recommended by the respective manufacturers.

[0019] It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings of this specification are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of implementation of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this utility model, should still fall within the scope of the technical content disclosed in this utility model. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity of description and are not intended to limit the scope of implementation of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of implementation of this utility model.

[0020] Please refer to Figure 1 , Figure 2 This utility model discloses a forced ventilation degassing tower that prevents inlet icing, comprising a shell 1, a fan 2, and an anti-icing device 3. The shell 1 is provided with an air inlet 4 and an air outlet 5. The fan 2 is located at the air outlet 5 and is used to draw air from outside the shell 1 into the shell 1 through the air inlet 4. The anti-icing device 3 includes a steam pipe assembly. The steam pipe assembly has an inlet 31 and an outlet 32. The inlet 31 is connected to a low-pressure steam pipe 6. The outlet 32 ​​is connected to a drain pipe 7. The anti-icing device 3 is located at the air inlet 4 and is used to heat the area around the air inlet 4, i.e., the portion of the shell 1 located around the air inlet 4.

[0021] The anti-icing device 3 works by guiding low-pressure steam into the steam pipe assembly, then dissipating the heat from the low-pressure steam to the outside, heating the air near the air inlet 4, thereby preventing ice formation at the air inlet 4. After heat exchange in the steam pipe assembly, some of the low-pressure steam liquefies. To prevent the liquefied water from affecting the heating effect of the steam pipe assembly, a steam trap 9 is installed on the drain pipe 7 to prevent steam from escaping and draining the liquefied water. The drained water flows into the outer casing 1. Valves 11 are installed on both the low-pressure steam pipe 6 and the drain pipe 7 to control whether the anti-icing device 3 is in operation.

[0022] Specifically, in this embodiment, the outer casing 1 is rectangular in shape, and the air intake 5 is located at the top of the outer casing 1. The air inlets 4 are located on the front and rear sides of the outer casing 1. Figure 1 They are distributed on both sides (vertically perpendicular to the paper surface). The water filtered by the dynamic membrane tank flows from the left side of the outer shell 1 ( Figure 1 The lower part of the water (on the left side) is introduced into the housing 1 through a pipe, and then sprayed out through the nozzle 10 installed inside the housing 1 near the top of the housing 1, and then discharged into the suction well from the discharge pipe 8 at the bottom of the housing 1. The fan 2 is an axial flow fan 2, which is installed on the top of the housing 1.

[0023] Please continue to refer to Figure 1 , Figure 2 The steam pipe assembly is installed on the outer wall of the outer casing 1 using pipe clamps, hooks, and other connectors, facilitating installation and maintenance. The overall shape of the steam pipe assembly should match the shape of the air inlet 4 to ensure that all air before the air inlet 4 can be heated. In this embodiment, the steam pipe assembly includes multiple horizontal pipes 33, a first vertical pipe 34, and a second vertical pipe 35. One end of each horizontal pipe 33 is connected to the first vertical pipe 34, and the other end is connected to the second vertical pipe 35. The inlet 31 is located on the first vertical pipe 34, and the outlet 32 ​​is located on the second vertical pipe 35. The axes of the multiple horizontal pipes 33, the first vertical pipe 34, and the second vertical pipe 35 are located in the same plane. The axes of the multiple horizontal pipes 33 are parallel to each other, and the first vertical pipe 34 and the second vertical pipe 35 are parallel. The horizontal pipes 33 are evenly spaced between the first vertical pipe 34 and the second vertical pipe 35, allowing air to enter the air inlet 4 through the gaps between adjacent horizontal pipes 33.

[0024] The air inlet 4 is a louvered air inlet 4, comprising multiple branch inlets 41, the number of which corresponds one-to-one with the number of horizontal pipes 33. Each branch inlet 41 is rectangular, its length parallel to the axis of the horizontal pipe 33. Each horizontal pipe 33 is positioned at its corresponding branch inlet 41. This ensures that the air at each branch inlet 41 is heated, guaranteeing the anti-icing effect of the steam pipe assembly.

[0025] In another embodiment of this utility model, the air inlet 4 is a single rectangular opening, and correspondingly, the steam pipe assembly includes only one horizontal pipe 33. The left and right ends of the horizontal pipe 33 are the inlet 31 and the outlet 32 ​​of the steam pipe assembly, respectively, and the horizontal pipe 33 is installed in front of the air inlet 4.

[0026] In another embodiment of this utility model, the air inlet 4 is a circular opening. Correspondingly, the steam pipe assembly includes a set of coils or a circular pipe, with openings on the wall of the coils or circular pipe serving as the inlet 31 and outlet 32 ​​of the steam pipe assembly. The projection of the coils or circular pipe at the air inlet 4 falls within the range of the air inlet 4, ensuring the anti-icing effect of the steam pipe assembly.

[0027] This invention relates to a forced ventilation degassing tower that prevents inlet icing. By installing an anti-icing device 3 at the air inlet 4 of the degassing tower shell 1, when the ambient temperature is low, the air near the air inlet 4 is heated by the heat emitted by the low-pressure steam in the steam pipe group, thereby preventing icing at the air inlet 4 and ensuring that outside air can smoothly enter the degassing tower to remove chlorine from the water in the degassing tower. This ensures that the circulating water indicators meet the standards and achieves near-zero sewage discharge.

[0028] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A forced ventilation degassing tower that prevents inlet icing, characterized in that, Includes an outer casing (1), a fan (2), and an anti-icing device (3); wherein, The outer casing (1) is provided with an air inlet (4) and an air outlet (5); the fan (2) is located at the air outlet (5) and is used to draw air from outside the outer casing (1) into the outer casing (1) through the air inlet (4); The anti-icing device (3) includes a steam pipe assembly; the steam pipe assembly has an inlet (31) and an outlet (32); The inlet (31) is connected to the low-pressure steam pipe (6); the outlet (32) is connected to the drainage pipe (7); The anti-icing device (3) is located at the air inlet (4) and is used to heat the area around the air inlet (4).

2. The forced ventilation degassing tower for preventing inlet icing according to claim 1, characterized in that: The steam pipe assembly includes multiple horizontal pipes (33), a first vertical pipe (34), and a second vertical pipe (35); one end of each of the multiple horizontal pipes (33) is connected to the first vertical pipe (34), and the other end is connected to the second vertical pipe (35); The inlet (31) is located on the first longitudinal pipe (34), and the outlet (32) is located on the second longitudinal pipe (35).

3. The forced ventilation degassing tower for preventing inlet icing according to claim 2, characterized in that: The axes of the plurality of horizontal tubes (33), the first vertical tube (34) and the second vertical tube (35) are located in the same plane; The axes of the plurality of horizontal tubes (33) are parallel to each other, and the first vertical tube (34) and the second vertical tube (35) are parallel; the horizontal tubes (33) are evenly spaced between the first vertical tube (34) and the second vertical tube (35).

4. The forced ventilation degassing tower for preventing inlet icing according to claim 2, characterized in that: The outer shell (1) is rectangular, and the air extraction port (5) is located at the top of the outer shell (1); The air inlets (4) are distributed on both the front and rear sides of the outer casing (1).

5. The forced ventilation degassing tower for preventing inlet icing according to claim 4, characterized in that: The air inlet (4) includes multiple branch ports (41), the number of which is the same as the number of the horizontal pipes (33) and corresponds one-to-one; The opening (41) is a rectangular opening, and its length direction is parallel to the axis direction of the horizontal tube (33); each of the horizontal tubes (33) is arranged at the corresponding opening (41).

6. The forced ventilation degassing tower for preventing inlet icing according to claim 1, characterized in that: A condensate drain (9) is installed on the drainage pipe (7), and the condensate drained by the condensate drain (9) is discharged into the outer shell (1).

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