Spraying device for boiler flue gas desulfurization

Abstract

The utility model belongs to the technical field of desulfurization devices, and particularly relates to a spraying device for boiler flue gas desulfurization, which comprises a desulfurization tower, an alkali liquor box, three spraying components, a speed reducing motor and a rotating shaft, the desulfurization tower is connected with a gas inlet pipe and a gas outlet pipe, and a filter screen is arranged in the desulfurization tower; the alkali liquor box is connected with a liquid conveying pipe, and the liquid conveying pipe is connected with three liquid guide pipes; the three spraying assemblies are arranged in the desulfurizing tower, each spraying assembly comprises an annular spraying pipe, the three annular spraying pipes are connected with the three liquid guide pipes respectively, and spraying heads are arranged at the bottoms of the annular spraying pipes; the gear motor is arranged above the desulfurizing tower, the rotating shaft is arranged in the desulfurizing tower, the rotating shaft is in transmission connection with an output shaft of the gear motor, the rotating shaft penetrates through the three annular spraying pipes, three fan blade assemblies are arranged on the rotating shaft, and each fan blade assembly comprises a plurality of fan blades. According to the device, the contact time of alkali liquor and sulfide can be prolonged, sulfur-containing flue gas is fully desulfurized, and the desulfurization stability, desulfurization effect and desulfurization efficiency are improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the desulfurization device technical field, concretely relates to a kind of for boiler flue gas desulfurization spray device. BACKGROUND

[0002] Currently, the coal powder used by coal-fired boiler contains sulfur, and in the process of high-temperature firing at 1200-1500 ℃, sulfur is converted into SO2 by chemical reaction and enters flue gas, resulting in SO2 emission concentration of 5000-6000 mg / Nm 3 , which causes serious pollution to the environment. Therefore, before flue gas is discharged into the atmosphere, desulfurization device is needed to desulfurize flue gas.

[0003] In the prior art, desulfurization tower is mostly used to desulfurize flue gas, and spray device is generally provided in the desulfurization tower to absorb SO2 in flue gas by spraying alkali liquor. However, when treating large amount of continuously-injected flue gas, the problem of insufficient contact between sprayed droplets and flue gas occurs in the spray device, and part of flue gas is discharged from the desulfurization tower without being desulfurized sufficiently, resulting in unstable desulfurization performance, low desulfurization effect and desulfurization efficiency.

[0004] Therefore, it is urgent to improve. CONTENT OF UTILITY MODEL

[0005] In view of the above defects in the prior art, the utility model provides a kind of for boiler flue gas desulfurization spray device, including desulfurization tower, alkali liquor tank, three spray components, speed reducer and shaft, the lower part of desulfurization tower is connected with inlet pipe, the upper part of desulfurization tower is connected with outlet pipe, and air blower is provided on outlet pipe, filter screen is provided in the inside of desulfurization tower, and filter screen is located above the connecting port between inlet pipe and desulfurization tower;Alkali liquor tank is arranged outside desulfurization tower, and the top of alkali liquor tank is provided with liquid inlet, the bottom of alkali liquor tank is connected with liquid conveying pipe, and liquid pump is provided on liquid conveying pipe, three liquid guide pipes are connected to liquid conveying pipe, and three liquid guide pipes respectively pass through the side wall of desulfurization tower and extend inward;Three spray components are sequentially arranged in the inside of desulfurization tower from top to bottom, each spray component includes annular spray pipe, three annular spray pipes in three spray components are connected to three liquid guide pipes respectively, and the bottom of each annular spray pipe is provided with a plurality of spray heads respectively;Speed reducer is fixedly arranged above desulfurization tower, shaft is vertically arranged in the inside of desulfurization tower and located above filter screen, the top end of shaft penetrates the top wall of desulfurization tower and is connected to the output shaft of speed reducer in transmission, shaft penetrates the center of three annular spray pipes, three fan blade assemblies are sequentially arranged on shaft from top to bottom, and three fan blade assemblies are respectively located below three spray components, and each fan blade assembly includes a plurality of fan blades.

[0006] Optionally, the desulfurization tower is connected with a liquid discharge pipe at the bottom, and a base is arranged below the desulfurization tower.

[0007] Specifically, the liquid discharge pipe is used for discharging the accumulated liquid at the bottom of the desulfurization tower.

[0008] Optionally, the side of the desulfurization tower is provided with an inspection opening and an inspection door.

[0009] Specifically, the inspection opening and the inspection door facilitate the maintenance of the inside of the desulfurization tower by the staff.

[0010] Optionally, a mist eliminator is arranged at the connecting opening between the gas outlet pipe and the desulfurization tower.

[0011] Specifically, the mist eliminator is used for demisting.

[0012] Optionally, a downwardly inclined liquid baffle is arranged at the connecting opening between the gas inlet pipe and the desulfurization tower.

[0013] Specifically, the liquid baffle can prevent the splashing of the sprayed alkali liquid into the gas inlet pipe to form backflow.

[0014] Optionally, a booster pump is further arranged on the liquid delivery pipe, and a valve is arranged on each liquid guide pipe.

[0015] Specifically, the booster pump is used for pressurization, and the valve facilitates the separate and independent control of the on-off of the alkali liquid in each liquid guide pipe.

[0016] Optionally, a fixed support is further arranged in the desulfurization tower, the left and right ends of the fixed support are fixed to the inner wall of the desulfurization tower, and the middle part of the fixed support is rotationally connected with the rotating shaft.

[0017] Specifically, the fixed support is used for improving the stability during the rotation of the rotating shaft.

[0018] The utility model also includes other components which can make the spraying device for flue gas desulfurization of a boiler normally used, and are all conventional technical means in the field. In addition, the devices or components not limited in the utility model all adopt conventional technical means in the field, such as induced draft fan, speed reducer, liquid pump and booster pump.

[0019] The working principle of the utility model discloses is that the sulfur-containing flue gas enters the desulfurization tower through the air inlet pipe, the filter screen filters out the large particle impurities in the flue gas, the liquid pump is opened, the lye is pumped into the liquid delivery pipe, then enters the liquid guide pipe, under the pressurizing effect of the booster pump, enters the annular spray pipe, finally is sprayed from the spray head, the reduction motor is started at the same time, drives the rotating shaft to rotate, and then drives the three fan blade assemblies to rotate, the rotating fan blades blow the flue gas to the spray head of the annular spray pipe, the lye sprayed from the spray head absorbs and reacts with the sulfides in the flue gas, and the three spray assemblies arranged on the upper, middle and lower parts can also improve the contact time between the lye droplets and the sulfides, so that the sulfides are fully absorbed, the flue gas after desulfurization is discharged from the desulfurization tower under the flow guiding of the induced draft fan, and the sulfur-containing liquid generated by the reaction flows to the bottom of the tower under the action of gravity, if the desulfurization tower needs to be cleaned or the filter screen is blocked, the lye can be replaced with cleaning liquid, and the desulfurization tower and the filter screen are cleaned through the spray assembly, so that the cleanliness of the desulfurization tower is improved, and the filter screen is less blocked.

[0020] The utility model discloses the beneficial effect is, through desulfurization tower, lye tank, three spray assemblies, reduction motor and rotating shaft, can when handling large air volume, continuous flue gas, improve the contact time of lye and sulfide, make lye droplet can fully contact with sulfide, thereby make sulfur-containing flue gas get fully desulfurization, improve the stability of desulfurization, improve desulfurization effect and desulfurization efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0021] The utility model is further explained below in connection with the drawings and examples.

[0022] Figure 1 It is the whole structure schematic diagram of the utility model.

[0023] Figure 2 It is Figure 1 The enlarged schematic diagram of A department structure.

[0024] Figure 3 It is the structure schematic diagram of the spray assembly of the utility model.

[0025] In the drawing: 1. desulfurization tower, 2. lye tank, 3. spray assembly, 4. reduction motor, 5. rotating shaft, 6. air inlet pipe, 7. liquid baffle, 8. air outlet pipe, 9. induced draft fan, 10. filter screen, 11. liquid delivery pipe, 12. liquid pump, 13. liquid guide pipe, 14. annular spray pipe, 15. spray head, 16. fan blade, 17. base, 18. liquid discharge pipe, 19. inspection port, 20. booster pump, 21. valve, 22. fixed support. DETAILED DESCRIPTION

[0026] The utility model is clearly described below in combination with the drawings and specific embodiments in the embodiments of the utility model, and the description herein is only used to explain the utility model, but not as a limitation on the utility model. All other embodiments obtained by the person skilled in the art without creative labor, any modification, equivalent replacement, improvement, etc. made, should be included in the protection scope of the utility model.

[0027] Embodiment

[0028] As Figures 1-3 shown, the utility model embodiment provides a kind of for boiler flue gas desulfurization spray device, including desulfurizer 1, lye tank 2, three spray components 3, reduction motor 4 and shaft 5, the lower portion of desulfurizer 1 is connected with inlet pipe 6, and the connecting port between inlet pipe 6 and desulfurizer 1 is provided with downwardly inclined liquid baffle 7, liquid baffle 7 can prevent splashing lye and form backwash by being sprayed into inlet pipe 6;The upper portion of desulfurizer 1 is connected with outlet pipe 8, and induced draft fan 9 is provided on outlet pipe 8, and the connecting port between outlet pipe 8 and desulfurizer 1 is provided with mist eliminator, and mist eliminator is used for demisting;Filter screen 10 is provided in the inside of desulfurizer 1, and filter screen 10 is located above the connecting port between inlet pipe 6 and desulfurizer 1;Lye tank 2 is arranged at the outside of desulfurizer 1, and the top of lye tank 2 is provided with liquid inlet, and the bottom of lye tank 2 is connected with liquid conveying pipe 11, and liquid conveying pipe 11 is provided with liquid pump 12, and liquid conveying pipe 11 is connected with three liquid guide pipes 13, and three liquid guide pipes 13 respectively pass through the side wall of desulfurizer 1 and extend inward;Three spray components 3 are sequentially arranged in the inside of desulfurizer 1 from top to bottom, each spray component 3 includes annular spray pipe 14, three annular spray pipes 14 in three spray components 3 are connected with three liquid guide pipes 13 respectively, and the bottom of each annular spray pipe 14 is provided with multiple spray heads 15;Reduction motor 4 is fixedly arranged above desulfurizer 1, shaft 5 is vertically arranged in the inside of desulfurizer 1 and is located above filter screen 10, the top end of shaft 5 penetrates the top wall of desulfurizer 1 and is connected with the output shaft transmission of reduction motor 4, shaft 5 penetrates the center of three annular spray pipes 14, three fan blade assemblies are sequentially arranged on shaft 5 from top to bottom, and three fan blade assemblies are respectively correspondingly located below three spray components 3, and each fan blade assembly includes several fan blades 16.

[0029] In addition, the desulfurization tower 1 is provided with a base 17 below, and a liquid discharge pipe 18 is connected to the bottom of the desulfurization tower 1, and the liquid discharge pipe 18 is used for discharging the accumulated liquid at the bottom of the desulfurization tower 1. The side of the desulfurization tower 1 is provided with an inspection opening 19 and an inspection door, which facilitates the staff to overhaul the inside of the desulfurization tower 1. The liquid delivery pipe 11 is also provided with a booster pump 20, and the booster pump 20 is used for pressurization; the valve 21 is arranged on each liquid guide pipe 13, respectively, and the valve 21 facilitates the opening and closing of the lye in each liquid guide pipe 13. The inside of the desulfurization tower 1 is also provided with a fixed support 22, and the left and right ends of the fixed support 22 are fixed on the inner wall of the desulfurization tower 1, and the middle part of the fixed support 22 is rotationally connected with the rotating shaft 5, and the fixed support 22 is used to improve the stability of the rotating shaft 5 during rotation.

[0030] The working principle of the utility model is that the sulfur-containing flue gas enters the desulfurization tower 1 through the inlet pipe 6, the filter screen 10 filters out the large particle impurities in the flue gas, the liquid pump 12 is opened, the lye is pumped into the liquid delivery pipe 11, and then enters the liquid guide pipe 13, under the pressurization of the booster pump 20, enters the annular spray pipe 14, and finally is sprayed from the spray head 15, and the reduction motor 4 is started at the same time, drives the rotating shaft 5 to rotate, and then drives the three fan blade assemblies to rotate, and the rotating fan blades 16 blow the flue gas to the spray head 15 of the annular spray pipe 14, the lye sprayed from the spray head 15 absorbs and reacts with the sulfide in the flue gas, and the three spray assemblies 3 arranged on the upper, middle and lower parts can also improve the contact time between the lye droplets and the sulfide, so that the sulfide is fully absorbed, and the flue gas after desulfurization is discharged from the desulfurization tower 1 under the flow guiding of the induced draft fan 9, and the reaction generated sulfur-containing liquid flows to the bottom of the tower under the action of gravity; if the desulfurization tower 1 needs to be cleaned or the filter screen 10 is blocked, the lye can be replaced with cleaning liquid, and the inside of the desulfurization tower 1 and the filter screen 10 are cleaned through the spray assembly 3, so as to improve the cleanliness of the desulfurization tower 1 and reduce the blockage of the filter screen 10.

[0031] The above has described the embodiments of the utility model, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A spraying device for flue gas desulfurization of a boiler, comprising a desulfurization tower, a lye tank, three spraying assemblies, a speed reducer and a rotating shaft, characterized in that: The lower part of the desulfurization tower is connected with an air inlet pipe, the upper part of the desulfurization tower is connected with an air outlet pipe, and an induced draft fan is arranged on the air outlet pipe, a mist catcher is arranged at the connecting opening between the air outlet pipe and the desulfurization tower, a filter screen is arranged in the desulfurization tower, the filter screen is located above the connecting opening between the air inlet pipe and the desulfurization tower, a liquid discharge pipe is connected to the bottom of the desulfurization tower, a base is arranged below the desulfurization tower, and an inspection opening and an inspection door are arranged on the side of the desulfurization tower; the lye tank is arranged outside the desulfurization tower, a liquid conveying pipe is connected to the bottom of the lye tank, a liquid pumping pump is arranged on the liquid conveying pipe, the liquid conveying pipe is connected with three liquid guide pipes, and the three liquid guide pipes respectively pass through the side wall of the desulfurization tower and extend inward; three spraying assemblies are sequentially arranged in the desulfurization tower from top to bottom, each spraying assembly comprises an annular spraying pipe, the three annular spraying pipes in the three spraying assemblies are respectively connected with the three liquid guide pipes, a plurality of nozzles are respectively arranged at the bottom of each annular spraying pipe; a speed reducer is fixedly arranged above the desulfurization tower, a rotating shaft is vertically arranged in the desulfurization tower, the top end of the rotating shaft penetrates through the top wall of the desulfurization tower and is connected in transmission with the output shaft of the speed reducer, the rotating shaft penetrates through the centers of the three annular spraying pipes, three fan blade assemblies are sequentially arranged on the rotating shaft from top to bottom, and the three fan blade assemblies are respectively located below the three spraying assemblies, and each fan blade assembly comprises a plurality of fan blades.

2. A spray device for flue gas desulphurization of a boiler according to claim 1, characterized in that: A liquid blocking plate is arranged at the connecting opening between the air inlet pipe and the desulfurization tower.

3. The spray device for flue gas desulfurization of a boiler according to claim 2, characterized in that: A booster pump is further arranged on the liquid conveying pipe, and a valve is respectively arranged on each liquid guide pipe.

4. The spray device for flue gas desulfurization of a boiler according to claim 3, characterized in that: A fixed support is further arranged in the desulfurization tower, and the left and right ends of the fixed support are fixed to the inner wall of the desulfurization tower, and the middle part of the fixed support is rotatably connected with the rotating shaft.

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