Fluidized concentrated water evaporator

Abstract

The utility model discloses a fluidization concentrated water evaporator which comprises an evaporator body, a smoke inlet pipe and a smoke outlet pipe, the smoke inlet pipe and the smoke outlet pipe are connected to the upper end and the lower end of the evaporator body respectively, fluidization air inlets are formed in the upper portion, the middle portion and the lower portion of the evaporator body respectively, and the fluidization air inlet in the upper portion is used for introducing hot air to provide a heat source and power. The middle fluidization air inlet is used for introducing hot air to blow the barrel wall of the evaporator body, and the lower fluidization air inlet is used for introducing hot air to assist in fluidization conveying of crystal substances through the smoke outlet pipe. According to the fluidized concentrated water evaporator, through a series of innovative design improvements, the problems of scaling of the cylinder wall and blockage of the outlet in the prior art are successfully solved, the operation efficiency and the stability of the evaporator are remarkably improved, and a more reliable and efficient technical scheme is provided for zero discharge treatment of desulfurization wastewater.

Description

Technical Field

[0001] The utility model belongs to the technical field of evaporators, and in particular relates to a fluidized concentrated water evaporator. Background Art

[0002] In my country, approximately 90% of coal-fired power plants use limestone-gypsum wet desulfurization technology. This technology is widely popular for its high desulfurization efficiency, stable operational performance, and mature technical features. However, it also comes with a significant problem: the generation of large amounts of desulfurization wastewater. To address this issue, the applicant has adopted high-temperature bypass flue evaporation technology. This technology first homogenizes the desulfurization wastewater, then passes it through a filter. Compressed air is then used to atomize it into tiny droplets, which are then sprayed into an evaporation vessel. Inside the evaporator, the atomized water is evaporated using waste heat from the power plant's flue gas. Crystallized pollutants generated during the evaporation process are transported along with the flue gas through the exhaust port to the electrostatic precipitator. In the electrostatic precipitator, the crystals are charged and separated from the airflow by the electric field. They are then discharged along with the fly ash into the ash hopper, achieving zero discharge of desulfurization wastewater.

[0003] However, in practice, the applicant discovered that the high-temperature flue gas introduced from the upper portion of the evaporator body failed to effectively purge the cylinder walls, resulting in a large accumulation of scale from the desulfurization wastewater on the evaporator's inner walls. This accumulation not only hindered further evaporation and crystallization in the evaporator but also frequently led to ash blockage at the evaporator outlet. In light of these issues, we conducted in-depth research, resulting in the present utility model patent application. Utility Model Content

[0004] The purpose of the utility model is to provide a fluidized concentrated water evaporator, aiming to solve the problem in the prior art that the fluidized concentrated water evaporator cannot effectively prevent scaling of the cylinder wall and blockage of the outlet.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A fluidized concentrated water evaporator comprises an evaporator body (10), and a smoke inlet pipe (5) and a smoke outlet pipe (13) respectively connected to the upper and lower ends of the evaporator body (10), characterized in that: fluidized air inlets are respectively provided at the upper, middle and lower parts of the evaporator body (10), wherein: the fluidized air inlet at the upper part is used to introduce hot air to provide a heat source and power, the fluidized air inlet at the middle part is used to introduce hot air to blow the cylinder wall of the evaporator body (10), and the fluidized air inlet at the lower part is used to introduce hot air to assist the fluidized transportation of crystals through the smoke outlet pipe (13).

[0007] Furthermore, the upper fluidized air inlet is connected to the hot air delivery pipeline (2) via a primary air inlet pipe (21), the middle fluidized air inlet is connected to the hot air delivery pipeline (2) via a secondary air inlet pipe (4), and the lower fluidized air inlet is connected to the hot air delivery pipeline (2) via a tertiary air inlet pipe (22).

[0008] Furthermore, a heating and blowing structure is provided at the first section of the hot air delivery pipe (2).

[0009] Furthermore, the heating and blowing structure comprises a filter (15), a fan (16) and a heater (17) arranged in sequence along the gas conveying direction, and the filter (15), the fan (16) and the heater (17) are integrated in the box (1).

[0010] Furthermore, a control panel is provided on the box (1), and the control panel is connected to the control circuits of the fan (16) and the heater (17) for adjusting the power of the two according to predetermined requirements.

[0011] Furthermore, a fluid atomizing spray gun (9) is provided on the upper portion of the evaporator body (10), and the injection port of the fluid atomizing spray gun extends into the barrel cavity of the evaporator body (10).

[0012] Furthermore, an automatic filter (7) and a pump body (6) are sequentially arranged on the desulfurization wastewater supply pipeline of the fluid atomizing spray gun (9) according to the fluid movement direction.

[0013] Furthermore, two groups of the fluid atomizing spray guns (9) are provided, and the two groups of the fluid atomizing spray guns (9) share a desulfurization wastewater supply pipeline through a diverter box (20).

[0014] Furthermore, the automatic filter (7) and the pump body (6) are supported on the upper part of the evaporator body (10) through a support plate (8).

[0015] By adding fluidized air inlets in the upper, middle and lower parts and giving them different functions, the fluidized concentrated water evaporator of this utility model has achieved significant technical progress in the following aspects:

[0016] First, the hot air introduced through the upper fluidization air inlet not only provides the necessary heat source for the evaporator, promoting the evaporation of desulfurization wastewater, but also, through its dynamic effect, makes the gas flow in the evaporator more uniform, enhancing the fluidization effect of the entire evaporation system. This helps reduce scaling problems caused by local temperature or flow rate unevenness and improves the operating efficiency of the evaporator.

[0017] Secondly, the design of the central fluidized air inlet directly addresses the problem of scaling on the evaporator tube wall. By introducing hot air to continuously purge the tube wall, it effectively prevents the accumulation of scaling in the desulfurization wastewater, thereby preventing blockage in the evaporator's internal space and reducing evaporation efficiency. This improvement not only extends the evaporator's service life but also reduces maintenance costs.

[0018] Furthermore, the lower fluidization air inlet is designed to facilitate the smooth discharge of crystals. The introduction of hot air here provides additional momentum for the crystals, allowing them to be fluidized more smoothly through the flue gas outlet to subsequent treatment equipment. This not only reduces the risk of flue gas outlet blockage but also ensures the continuous and stable operation of the entire wastewater treatment system.

[0019] Furthermore, the utility model achieves efficient purification and heating of hot air through an integrated heating and blowing structure. The rational layout of the filter, fan, and heater ensures the cleanliness and temperature stability of the hot air during delivery, providing a stable and reliable heat source for the evaporator.

[0020] In terms of control, the introduction of a control panel allows operators to flexibly adjust the power of the fan and heater according to actual needs, thereby achieving precise control of the evaporation process. This not only improves the system's automation level, but also enhances its ability to adapt to different working conditions.

[0021] In summary, the fluidized concentrated water evaporator of the utility model has successfully solved the problems of wall scaling and outlet blockage existing in the prior art through a series of innovative design improvements, significantly improved the operating efficiency and stability of the evaporator, and provided a more reliable and efficient technical solution for zero-emission treatment of desulfurization wastewater. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the cross-sectional structure of the evaporator body of the utility model;

[0023] Figure 2 This is a schematic diagram of the front view structure of the box body of the utility model;

[0024] Figure 3 This is a schematic diagram of the top view of the installation pipe structure of the utility model;

[0025] Figure 4 This is a side structural diagram of the fluid atomizing spray gun of the present invention.

[0026] In the figure: 1. Box body; 2. Hot air delivery pipeline; 4. Secondary air inlet pipe; 5. Smoke inlet pipe; 6. Pump body; 7. Automatic filter; 8. Support plate; 9. Fluid atomizing spray gun; 10. Evaporator body; 11. Gas distributor; 12. Purge pipe; 13. Smoke outlet pipe; 15. Filter; 16. Fan; 17. Heater; 19. Control panel; 20. Diverter box; 21. Primary air inlet pipe; 22. Tertiary air inlet pipe. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] Figures 1 to 4 The first embodiment of the present invention is shown: a fluidized concentrated water evaporator, comprising an evaporator body 10, and a smoke inlet pipe 5 and a smoke outlet pipe 13 respectively connected to the upper and lower ends of the evaporator body 10, characterized in that: fluidized air inlets are respectively opened in the upper, middle and lower parts of the evaporator body 10, wherein: the fluidized air inlet at the upper part is used to introduce hot air to provide a heat source and power, the fluidized air inlet in the middle part is used to introduce hot air to blow the cylinder wall of the evaporator body 10, and the fluidized air inlet at the lower part is used to introduce hot air to assist the fluidization and transportation of crystals through the smoke outlet pipe 13.

[0029] from Figure 1 It can be seen that in the specific implementation, the upper fluidized air inlet is connected to the hot air conveying pipeline 2 through the primary air inlet pipe 21, the middle fluidized air inlet is connected to the hot air conveying pipeline 2 through the secondary air inlet pipe 4, and the lower fluidized air inlet is connected to the hot air conveying pipeline 2 through the tertiary air inlet pipe 22.

[0030] like Figure 3 As shown, in this embodiment, the fluidized air inlet in the middle is evenly distributed around the evaporator body 10 in a circumferential manner, and is connected to the gas distribution tank 11 at the tail section of the secondary air inlet pipe 4 through the corresponding purge pipe 12.

[0031] Reference Figure 1Specifically, the heating and blowing structure includes a filter 15, a fan 16 and a heater 17 arranged in sequence along the gas delivery direction, and the filter 15, the fan 16 and the heater 17 are integrated in the box 1. When using this structure, the fan 16 and the heater 17 work, and the hot air enters the primary air inlet pipe 21, the secondary air inlet pipe 4 and the tertiary air inlet pipe 22 through the hot air delivery pipeline 2, which are respectively arranged in the upper, middle and lower parts of the evaporator body 10, and have three functions. First, the wind with a certain amount of heat is connected to the top of the evaporator body 10, which can provide a certain heat source and power to the evaporator body 10. Second, it is connected to the middle part of the evaporator body 10, and under the action of the gas separator 11, the wall of the evaporator body 10 can be evenly purged through multiple purge pipes 12. Third, it provides auxiliary effects when the crystals are transported with the flue gas at the bottom of the evaporator body 10. From Figure 2 It can be seen that in order to facilitate the staff to adjust the power of the fan 16 and the heater 17 to meet the air intake requirements, a control panel is provided on the box 1, and the control panel is connected to the control circuit of the fan 16 and the heater 17 to adjust the power of the two according to predetermined requirements.

[0032] In a specific application scenario, a fluid atomizing spray gun 9 is further provided on the upper portion of the evaporator body 10, the injection port of which extends into the cylindrical cavity of the evaporator body 10. An automatic filter 7 and a pump body 6 are sequentially provided on the desulfurization wastewater supply pipeline of the fluid atomizing spray gun 9 in the direction of fluid movement.

[0033] like Figure 4 As shown, in order to improve the processing efficiency of the evaporator, two groups of fluid atomizing spray guns 9 are provided, and the two groups of fluid atomizing spray guns 9 share a desulfurization wastewater supply pipeline through the diverter box 20.

[0034] Specifically, in order to facilitate the installation of the automatic filter 7 and the pump body 6 , the automatic filter 7 and the pump body 6 are supported on the upper portion of the evaporator body 10 through a support plate 8 .

[0035] The working principle of this embodiment is as follows:

[0036] When using this device, the desulfurization wastewater must first be treated. The treated water is then filtered through an automatic filter 7 and flows into a diversion box 20. Next, the water is sprayed into the evaporator body 10 via two fluid atomizing spray guns 9, where it is atomized into fine droplets by the power of compressed air. These droplets exchange heat with the high-temperature flue gas exiting the denitrification tower and evaporate. The newly added fluidizing air assists the heat exchange, evaporation, and crystallization process between the flue gas and the wastewater droplets, evenly sweeping the walls of the evaporator body 10 and ensuring that the crystals are transported while being fluidized.

[0037] The steps for hot air intake are as follows:

[0038] First, the fan 16 and the heater 17 work together, and the hot air generated enters the primary air inlet pipe 21, the secondary air inlet pipe 4 and the tertiary air inlet pipe 22 through the hot air delivery pipeline 2. These pipes are respectively located in the upper, middle and lower areas of the evaporator body 10, and play three roles.

[0039] Secondly, the wind with a certain amount of heat enters the top of the evaporator body 10, providing the necessary heat source and power for the evaporator.

[0040] Furthermore, the wind is also introduced into the middle of the evaporator body 10 , and under the action of the air distributor 11 , the wind evenly sweeps the cylinder wall of the evaporator body 10 through a plurality of sweeping pipes 12 .

[0041] Finally, the auxiliary air conveying 3 and the tertiary air inlet pipe 22 added at the bottom of the evaporator body 10 can provide auxiliary functions when the crystals are conveyed with the flue gas, effectively preventing scaling of the cylinder wall and ash blockage at the outlet.

[0042] In summary, the fluidized concentrated water evaporator of the utility model has successfully solved the problems of wall scaling and outlet blockage existing in the prior art through a series of innovative design improvements, significantly improved the operating efficiency and stability of the evaporator, and provided a more reliable and efficient technical solution for zero-emission treatment of desulfurization wastewater.

[0043] Finally, it should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0044] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fluidized concentrated water evaporator, comprising an evaporator body (10), and a smoke inlet pipe (5) and a smoke outlet pipe (13) respectively connected to the upper and lower ends of the evaporator body (10), characterized in that: Fluidized air inlets are respectively provided at the upper, middle and lower parts of the evaporator body (10), wherein: the upper fluidized air inlet is used to introduce hot air to provide a heat source and power, the middle fluidized air inlet is used to introduce hot air to blow the cylinder wall of the evaporator body (10), and the lower fluidized air inlet is used to introduce hot air to assist in fluidized transportation of crystals through the smoke outlet pipe (13).

2. The fluidized concentrated water evaporator according to claim 1, characterized in that: The upper fluidized air inlet is connected to the hot air delivery pipeline (2) via a primary air inlet pipe (21), the middle fluidized air inlet is connected to the hot air delivery pipeline (2) via a secondary air inlet pipe (4), and the lower fluidized air inlet is connected to the hot air delivery pipeline (2) via a tertiary air inlet pipe (22).

3. The fluidized concentrated water evaporator according to claim 2, characterized in that: The fluidized air inlet in the middle is evenly distributed around the evaporator body (10) in a circular pattern and is connected to the gas distribution tank (11) at the tail section of the secondary air inlet pipe (4) through a corresponding purge pipe (12).

4. The fluidized concentrated water evaporator according to claim 2 or 3, characterized in that: A heating and blowing structure is provided at the first section of the hot air conveying pipe (2).

5. The fluidized concentrated water evaporator according to claim 4, characterized in that: The heating and blowing structure comprises a filter (15), a fan (16) and a heater (17) arranged in sequence along a gas conveying direction, and the filter (15), the fan (16) and the heater (17) are integrated in a box (1).

6. The fluidized concentrated water evaporator according to claim 4, characterized in that: A control panel is provided on the box (1), and the control panel is connected to the control circuits of the fan (16) and the heater (17) for adjusting the power of the two according to predetermined requirements.

7. The fluidized concentrated water evaporator according to claim 1, 2, 3, 5 or 6, characterized in that: A fluid atomizing spray gun (9) is also provided on the upper portion of the evaporator body (10), and the injection port of the fluid atomizing spray gun extends into the barrel cavity of the evaporator body (10).

8. The fluidized concentrated water evaporator according to claim 7, characterized in that: An automatic filter (7) and a pump body (6) are sequentially arranged on the desulfurization wastewater supply pipeline of the fluid atomizing spray gun (9) according to the fluid movement direction.

9. The fluidized concentrated water evaporator according to claim 8, characterized in that: Two groups of the fluid atomizing spray guns (9) are provided, and the two groups of the fluid atomizing spray guns (9) share a desulfurization wastewater supply pipeline through a diverter box (20).

10. The fluidized concentrated water evaporator according to claim 8 or 9, characterized in that: The automatic filter (7) and the pump body (6) are supported on the upper part of the evaporator body (10) via a support plate (8).

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