Desulfurization wastewater flue high-temperature evaporation system

Abstract

A high-temperature evaporation system for a desulfurization wastewater flue relates to the technical field of evaporation devices and comprises an evaporation box, a buffer mesh cylinder is vertically and fixedly connected between the inner top surface and the inner bottom surface of the evaporation box, and a flue gas exhaust pipeline communicated with the area between the outer wall of the buffer mesh cylinder and the inner wall of the evaporation box is fixedly connected to the outer wall, close to the top, of the evaporation box. A waste water distribution cavity shell is rotationally arranged at the position, close to the top, of the temporary storage net barrel, and a plurality of liquid spraying nozzles communicated with an inner cavity of the waste water distribution cavity shell are evenly distributed on the lower surface of the waste water distribution cavity shell. The utility model solves the problem that the evaporation efficiency of the desulfurization waste water is influenced as the desulfurization waste water cannot be in uniform contact with high-temperature flue gas due to the limitation of the distribution mode of the desulfurization waste water when the desulfurization waste water is evaporated by utilizing the high-temperature flue gas in the traditional technology.

Description

Technical Field

[0001] This utility model relates to the field of evaporation device technology, specifically to a high-temperature evaporation system for desulfurization wastewater flue. Background Technology

[0002] Currently, the flue gas treatment method mainly involves atomizing the desulfurization wastewater and spraying it into the flue gas duct between the air preheater and the dust collector through atomizing nozzles. The high-temperature flue gas at the outlet of the air preheater is used to evaporate the desulfurization wastewater, and the solid products after evaporation are treated by the tail gas treatment device.

[0003] Currently, most coal-fired power plant boilers are equipped with flue gas desulfurization devices. The process of using the waste heat of flue gas after the air preheater of the power plant boiler to evaporate and treat desulfurization wastewater has the advantages of low investment and small footprint.

[0004] In the process of treating desulfurization wastewater using a flue gas desulfurization device, the wastewater is first atomized to break down large droplets into smaller ones. These smaller droplets then come into contact with the flue gas, where heat is transferred between them, thus achieving the purpose of treating the desulfurization wastewater.

[0005] A patent with publication number CN204714548U discloses a technology that allows desulfurization wastewater to be preheated and atomized into small droplets. These droplets are then completely evaporated within a short time and a short travel distance under the heating and evaporation of primary and secondary flue gas. The flue gas is finally discharged from the outlet at the top of the device, and the crystalline solids obtained after evaporation fall to the bottom of the tower and are discharged from the outlet, thus reducing the energy consumption and pollution potential of desulfurization wastewater treatment.

[0006] As existing devices are used, the shortcomings of this technology have gradually become apparent, mainly in the following aspects:

[0007] First, when existing desulfurization wastewater is evaporated using high-temperature flue gas, the distribution pattern of the desulfurization wastewater limits its ability to contact the high-temperature flue gas evenly, thus affecting the evaporation efficiency of the desulfurization wastewater.

[0008] Secondly, the solid products generated after the desulfurization wastewater and high-temperature flue gas evaporate accumulate at the bottom of the evaporation device, making it difficult to discharge the solid products and thus affecting the evaporation efficiency of the desulfurization wastewater.

[0009] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0010] To address the shortcomings of existing technologies, this utility model provides a high-temperature evaporation system for desulfurization wastewater flue gas. This system solves the problem that in traditional technologies, when desulfurization wastewater is evaporated using high-temperature flue gas, the distribution pattern of the desulfurization wastewater limits its uniform contact with the high-temperature flue gas, thus affecting the evaporation efficiency of the desulfurization wastewater.

[0011] To achieve the above objectives, this utility model provides the following technical solution:

[0012] A high-temperature evaporation system for desulfurization wastewater flue gas includes an evaporation tank. A buffer screen is vertically fixed between the inner top and bottom surfaces of the evaporation tank. A flue gas discharge pipe is fixed to the outer wall of the evaporation tank near the top, connecting the area between the outer wall of the buffer screen and the inner wall of the evaporation tank. A wastewater distribution chamber is rotatably provided near the top of the buffer screen. Several spray nozzles communicating with its inner cavity are evenly distributed on the lower surface of the wastewater distribution chamber.

[0013] The buffer mesh cylinder is rotatably provided with a flue gas distribution chamber shell near the bottom. The upper surface of the flue gas distribution chamber shell is evenly distributed with flue gas distribution holes that communicate with its inner cavity. The upper surface of the flue gas distribution chamber shell is surrounded by diversion blades along the center.

[0014] As an optimized solution, a slag discharge cylinder is vertically arranged on the outer bottom surface of the evaporator, which connects to the inner cavity of the buffer mesh cylinder.

[0015] As an optimized solution, scrapers are fixed to the opposite outer walls of the wastewater distribution chamber shell, and the side walls of the scrapers are in frictional contact with the inner wall of the buffer mesh cylinder.

[0016] As an optimized solution, a bottom plate is fixedly connected to the lower end of the slag discharge cylinder, and a discharge cylinder is fixedly connected to the outer wall of the slag discharge cylinder at an angle downwards near the lower end.

[0017] As an optimized solution, a flue gas inlet is coaxially rotatably provided inside the slag discharge cylinder, and the upper end of the flue gas inlet is fixedly connected to the flue gas distribution chamber shell.

[0018] As an optimized solution, a spirally arranged guide vane is fixed to the outer wall of the liquid inlet cylinder, and the outer edge of the guide vane is in frictional contact with the inner wall of the slag outlet cylinder.

[0019] As an optimized solution, a flow guide ring is fixed to the inner bottom surface of the evaporator inside the buffer mesh cylinder, and the inner hole of the flow guide ring is gradually narrowed from top to bottom.

[0020] As an optimized solution, the lower end of the smoke inlet extends through the base plate and is rotatably fitted with a smoke inlet connecting cylinder.

[0021] As an optimized solution, a lower gear ring is fixedly connected to the outer wall of the flue, and a lower drive motor is fixedly connected to the lower surface of the bottom plate. The output shaft of the lower drive motor meshes with the lower gear ring through a gear.

[0022] As an optimized solution, the upper end of the wastewater distribution chamber shell is fixedly connected to an inlet cylinder that communicates with its inner cavity, and the upper end of the inlet cylinder passes through the evaporator and is rotatably inserted with an inlet connecting cylinder.

[0023] As an optimized solution, an upper gear ring is fixedly connected to the outer wall of the liquid inlet cylinder, and an upper drive motor is fixedly connected to the outer top surface of the evaporator. The output shaft of the upper drive motor meshes with the upper gear ring through a gear.

[0024] Compared with the prior art, the beneficial effects of this utility model are:

[0025] By connecting the pressurized desulfurization wastewater to the inlet connecting cylinder, the wastewater distribution chamber shell is rotated by the upper drive motor, and the desulfurization wastewater is evenly sprayed out and falls by the spray nozzle, which can greatly improve the atomization uniformity and the contact uniformity with high temperature flue gas.

[0026] High-temperature flue gas enters the flue gas distribution chamber shell through the flue gas inlet connecting cylinder and is evenly sprayed upward through the flue gas distribution holes, so as to form convection with the falling water droplets, improve the contact area and uniformity. By rotating the flue gas distribution chamber shell, the flow divider blades are used to increase the kinetic energy of the flue gas, which can further accelerate the uniformity of contact with the falling water droplets and improve the evaporation efficiency.

[0027] By setting up a buffer mesh, the speed at which flue gas is discharged from the flue gas exhaust pipe can be reduced, further extending the contact time between the high-temperature flue gas and the falling water droplets, thereby improving evaporation efficiency.

[0028] The solid products generated after the evaporation of desulfurization wastewater and high-temperature flue gas fall to the bottom, enter the slag discharge cylinder under the action of the guide ring, and are discharged to the outside through the unloading cylinder, which is convenient and quick. Attached Figure Description

[0029] 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. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0030] Figure 1 This is a schematic diagram of the structure of this utility model.

[0031] In the diagram: 1-Evaporator; 2-Buffer screen; 3-Wastewater distribution chamber shell; 4-Spray nozzle; 5-Scraper; 6-Inlet cylinder; 7-Inlet connecting cylinder; 8-Upper toothed ring; 9-Upper drive motor; 10-Flue gas discharge pipe; 11-Slag discharge cylinder; 12-Flue gas inlet cylinder; 13-Lower toothed ring; 14-Lower drive motor; 15-Flue gas inlet connecting cylinder; 16-Bottom plate; 17-Discharge cylinder; 18-Guide vane; 19-Guide ring; 20-Flue gas distribution chamber shell; 21-Flue gas distribution hole; 22-Diverter vane. Detailed Implementation

[0032] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0033] like Figure 1 As shown, the high-temperature evaporation system for desulfurization wastewater flue gas includes an evaporator 1. A buffer screen cylinder 2 is vertically fixed between the inner top and bottom surfaces of the evaporator 1. A flue gas discharge pipe 10, connecting the area between the outer wall of the buffer screen cylinder 2 and the inner wall of the evaporator 1, is fixed to the outer wall near the top of the evaporator 1. A wastewater distribution chamber shell 3 is rotatably provided near the top of the buffer screen cylinder 2. Several spray nozzles 4, connected to its inner cavity, are evenly distributed on the lower surface of the wastewater distribution chamber shell 3.

[0034] The buffer mesh cylinder 2 has a flue gas distribution chamber shell 20 located near the bottom. The upper surface of the flue gas distribution chamber shell 20 is evenly distributed with flue gas distribution holes 21 that communicate with its inner cavity. The upper surface of the flue gas distribution chamber shell 20 is surrounded by diversion blades 22 along the center.

[0035] A slag discharge cylinder 11 is vertically mounted on the outer bottom surface of the evaporator 1, which is connected to the inner cavity of the buffer mesh cylinder 2.

[0036] Scrapers 5 are fixed to the opposite outer walls of the wastewater distribution chamber shell 3, and the side walls of the scrapers 5 are in frictional contact with the inner wall of the buffer mesh cylinder 2.

[0037] A bottom plate 16 is fixedly connected to the lower end of the slag discharge cylinder 11, and a discharge cylinder 17 is fixedly connected to the outer wall of the slag discharge cylinder 11 at an incline and downwards.

[0038] The slag discharge cylinder 11 is coaxially rotatably equipped with a flue gas inlet cylinder 12, and the upper end of the flue gas inlet cylinder 12 is fixedly connected to the flue gas distribution chamber shell 20.

[0039] A spirally arranged guide vane 18 is fixed to the outer wall of the liquid inlet cylinder 6. The outer edge of the guide vane 18 is in frictional contact with the inner wall of the slag outlet cylinder 11, so that the solid product can be discharged downward by rotating the flue 12 and using the reverse flow vane.

[0040] An evaporator 1 has a flow guide ring 19 fixed to its inner bottom surface inside the buffer mesh cylinder 2. The inner hole of the flow guide ring 19 is gradually narrowed from top to bottom.

[0041] The lower end of the smoke inlet 12 extends through the base plate 16 and is rotatably fitted with the smoke inlet connecting tube 15.

[0042] A lower gear ring 13 is fixedly connected to the outer wall of the inlet chimney 12, and a lower drive motor 14 is fixedly connected to the lower surface of the bottom plate 16. The output shaft of the lower drive motor 14 meshes with the lower gear ring 13 through a gear.

[0043] The upper end of the wastewater distribution chamber shell 3 is fixedly connected to the liquid inlet cylinder 6, which communicates with its inner cavity. The upper end of the liquid inlet cylinder 6 passes through the evaporator 1 and is rotatably inserted with the liquid inlet connecting cylinder 7.

[0044] An upper gear ring 8 is fixedly connected to the outer wall of the liquid inlet cylinder 6, and an upper drive motor 9 is fixedly connected to the outer top surface of the evaporator 1. The output shaft of the upper drive motor 9 meshes with the upper gear ring 8 through a gear.

[0045] The working principle of this device is as follows:

[0046] By connecting the inlet connecting cylinder 7 to the pressurized desulfurization wastewater, the upper drive motor 9 drives the wastewater distribution chamber shell 3 to rotate, and the spray nozzle 4 sprays the desulfurization wastewater evenly downwards, which can greatly improve the atomization uniformity and the contact uniformity with high-temperature flue gas.

[0047] High-temperature flue gas enters the flue gas distribution chamber shell 20 through the flue gas inlet connecting tube 15 and is evenly sprayed upward through the flue gas distribution hole 21, so as to form convection with the falling water droplets, improve the contact area and uniformity. By rotating the flue gas distribution chamber shell 20, the flow divider blade 22 is used to increase the kinetic energy of the flue gas, which can further accelerate the uniformity of contact with the falling water droplets and improve the evaporation efficiency.

[0048] By setting up a buffer mesh 2, the speed at which flue gas is discharged from the flue gas discharge pipe 10 can be reduced, further extending the contact time between the high-temperature flue gas and the falling water droplets, thereby improving the evaporation efficiency.

[0049] The solid products generated after the evaporation of desulfurization wastewater and high-temperature flue gas fall to the bottom and enter the slag discharge cylinder 11 under the action of the guide ring 19, and are discharged to the outside through the discharge cylinder 17, which is convenient and quick.

[0050] 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, 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. 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, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A high-temperature evaporation system for desulfurization wastewater flue gas, characterized in that: The system includes an evaporator (1), a buffer mesh cylinder (2) is vertically fixed between the inner top and inner bottom surfaces of the evaporator (1), a flue gas discharge pipe (10) is fixed to the outer wall of the evaporator (1) near the top, connecting the area between the outer wall of the buffer mesh cylinder (2) and the inner wall of the evaporator (1), a wastewater distribution chamber shell (3) is rotatably provided near the top of the buffer mesh cylinder (2), and a number of spray nozzles (4) are evenly distributed on the lower surface of the wastewater distribution chamber shell (3) and communicate with its inner cavity. The buffer mesh cylinder (2) is rotatably provided with a flue gas distribution chamber shell (20) near the bottom. The upper surface of the flue gas distribution chamber shell (20) is evenly distributed with flue gas distribution holes (21) that communicate with its inner cavity. The upper surface of the flue gas distribution chamber shell (20) is provided with a diversion blade (22) around the center.

2. The high-temperature evaporation system for desulfurization wastewater flue gas as described in claim 1, characterized in that: The evaporator (1) has a vertical slag discharge cylinder (11) on its outer bottom surface that connects to the inner cavity of the buffer mesh cylinder (2).

3. The high-temperature evaporation system for desulfurization wastewater flue gas as described in claim 2, characterized in that: Scrapers (5) are fixed to the opposite outer walls of the wastewater distribution chamber shell (3), and the side walls of the scrapers (5) are in frictional contact with the inner wall of the buffer mesh cylinder (2).

4. The high-temperature evaporation system for desulfurization wastewater flue gas as described in claim 3, characterized in that: A bottom plate (16) is fixedly connected to the lower end of the slag discharge cylinder (11), and a discharge cylinder (17) is fixedly connected to the outer wall of the slag discharge cylinder (11) at an incline and downward.

5. The high-temperature evaporation system for desulfurization wastewater flue gas as described in claim 4, characterized in that: The slag discharge cylinder (11) is coaxially rotatably provided with a flue gas inlet cylinder (12), and the upper end of the flue gas inlet cylinder (12) is fixedly connected to the flue gas distribution chamber shell (20).

6. The high-temperature evaporation system for desulfurization wastewater flue gas as described in claim 5, characterized in that: The evaporator (1) is fixed to the inner bottom surface of the buffer mesh cylinder (2) with a flow guide ring (19), and the inner hole of the flow guide ring (19) is gradually narrowed from top to bottom.

7. The high-temperature evaporation system for desulfurization wastewater flue gas as described in claim 6, characterized in that: The lower end of the smoke inlet pipe (12) extends through the bottom plate (16) and is rotatably fitted with a smoke inlet connecting pipe (15).

8. The high-temperature evaporation system for desulfurization wastewater flue gas as described in claim 7, characterized in that: A lower gear ring (13) is fixedly connected to the outer wall of the inlet pipe (12), and a lower drive motor (14) is fixedly connected to the lower surface of the bottom plate (16). The output shaft of the lower drive motor (14) meshes with the lower gear ring (13) through a gear.

9. The high-temperature evaporation system for desulfurization wastewater flue gas as described in claim 8, characterized in that: The upper end of the wastewater distribution chamber shell (3) is fixedly connected to an inlet cylinder (6) that communicates with its inner cavity. The upper end of the inlet cylinder (6) passes through the evaporator (1) and is rotatably inserted with an inlet connecting cylinder (7).

10. The high-temperature evaporation system for desulfurization wastewater flue gas duct according to claim 9, characterized in that: An upper gear ring (8) is fixedly connected to the outer wall of the liquid inlet cylinder (6), and an upper drive motor (9) is fixedly connected to the outer top surface of the evaporator (1). The output shaft of the upper drive motor (9) meshes with the upper gear ring (8) through a gear.

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