Desulfurization, dust removal and denitration device of biomass boiler

Abstract

A desulfurization, dust removal and denitration device for a biomass boiler relates to the technical field of flue gas treatment devices and comprises a treatment barrel shell, a plurality of alkali liquor distribution ring shells are fixedly connected to the outer wall of the treatment barrel shell in parallel from top to bottom, and a plurality of alkali liquor outlets communicated with the alkali liquor distribution ring shells are formed in the barrel wall of the treatment barrel shell in the circumferential direction in a surrounding mode and correspond to the alkali liquor distribution ring shells. An atomizing head is fixedly connected in each alkali liquor outlet, a filter screen is fixedly connected to the position, close to the upper end, of the treatment barrel shell, and a cleaning plate set in friction contact with the inner wall of the treatment barrel shell and the lower surface of the filter screen is rotationally arranged in the treatment barrel shell. The utility model solves the problems that dust and particulate matters are contained in flue gas in the prior art, most of the dust in the flue gas is separated after alkali liquor is in contact with the flue gas, and the separated dust and particulate matters are easy to gather in the device, so that the dust removal efficiency of the device on the flue gas is influenced.

Description

Technical Field

[0001] This utility model relates to the technical field of flue gas treatment devices, specifically to a desulfurization, dust removal, and denitrification device for biomass boilers. Background Technology

[0002] When boilers burn coal, they produce flue gas containing large amounts of sulfur and nitrogen. Therefore, desulfurization, denitrification, and dust removal equipment is needed to remove sulfur and nitrogen from the flue gas and filter dust. However, traditional flue gas desulfurization, denitrification, and dust removal equipment cannot recover residual heat from the flue gas during operation. The flue gas emitted has high heat, resulting in low heat utilization. At the same time, it is inconvenient for users to replace the desulfurization and denitrification components while the equipment is in operation, which reduces the practicality of the flue gas desulfurization, denitrification, and dust removal equipment. Among them, alkaline solutions can be used for boiler flue gas desulfurization and denitrification, which is a relatively common treatment method.

[0003] A prior art patent, CN211246063U, discloses a device comprising a base plate with casters fixed to the four corners of its bottom outer wall and hydraulic rods fixed to both sides of its outer wall. Support feet are provided on the bottom outer wall of the hydraulic rods. A push rod is fixed to the top outer wall of the base plate, and a mixing chamber is located on the top outer wall of the base plate. A motor housing is located on one side of the mixing chamber, and a motor is located on one side of the motor housing. The output end of the motor is connected to a rotating rod via a coupling, and evenly spaced stirring rods are fixed to the outer wall of the rotating rod. By incorporating hydraulic rods, support feet, and casters, and connecting the hydraulic rods to a hydraulic rod system, adjusting the length of the hydraulic rods to ensure the casters touch the ground, the device can be easily moved and is suitable for use in various boiler dust removal applications, greatly improving its practicality. Furthermore, adjusting the length of the hydraulic rods to ensure the support feet touch the ground improves the stability of the device.

[0004] As existing devices are used, the shortcomings of this technology have gradually become apparent, mainly in the following aspects:

[0005] First, when existing devices use alkaline solutions to desulfurize and denitrify boiler flue gas, the distribution of the alkaline solution limits its ability to contact the high-temperature flue gas evenly, thus affecting the desulfurization and denitrification efficiency.

[0006] Secondly, since the flue gas contains dust and particulate matter, most of the dust in the flue gas will be separated after the alkaline solution comes into contact with the flue gas. The separated dust and particulate matter tend to accumulate inside the device, which in turn affects the dust removal efficiency of the device for flue gas.

[0007] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0008] In view of the shortcomings of the existing technology, this utility model provides a desulfurization, dust removal and denitrification device for biomass boilers, which solves the problem that in traditional technology, when flue gas contains dust and particulate matter, most of the dust in the flue gas is separated after the alkaline solution comes into contact with the flue gas. However, the separated dust and particulate matter tend to accumulate inside the device, thus affecting the dust removal efficiency of the device for flue gas.

[0009] To achieve the above objectives, this utility model provides the following technical solution:

[0010] A desulfurization, dust removal, and denitrification device for a biomass boiler includes a treatment shell. Several alkaline solution distribution rings are fixedly connected in parallel from top to bottom on the outer wall of the treatment shell. Corresponding to each alkaline solution distribution ring, several alkaline solution outlets are circumferentially arranged around the treatment shell and connected to it. An atomizing head is fixedly connected to each alkaline solution outlet.

[0011] A filter screen is fixedly connected to the upper part of the processing cylinder shell, and a cleaning plate assembly is rotatably provided inside the processing cylinder shell, which rubs against the inner wall and the lower surface of the filter screen.

[0012] As an optimized solution, a flue gas outlet is fixedly connected to the upper end of the processing shell, and the inlet end of the flue gas outlet connects to the area between the filter screen and the top of the processing shell.

[0013] As an optimized solution, the lower end of the processing cylinder shell is rotatably provided with a flue gas inlet cylinder, the upper end of the flue gas inlet cylinder is fixedly connected with a baffle plate, and the outer wall of the flue gas inlet cylinder near the upper end is provided with a plurality of flue gas outlets.

[0014] As an optimized solution, the lower surface of the shielding disk is surrounded and fixed with several diverter blades.

[0015] As an optimized solution, a material outlet shell is fixedly connected to the lower end of the processing shell, and a plug plate is fixedly connected to the lower end of the material outlet shell. The flue gas inlet is coaxially rotatably mounted on the plug plate.

[0016] As an optimized solution, a discharge cylinder is fixedly attached to the outer wall of the material discharge cylinder shell at an angle downwards near the lower end.

[0017] As an optimized solution, a flow guide ring is fixed to the inner bottom surface of the processing cylinder shell, and the inner hole of the flow guide ring is gradually narrowed from top to bottom.

[0018] As an optimized solution, the cleaning plate assembly includes a bottom scraper fixed to the outer wall of the flue gas inlet cylinder, and the lower surface of the bottom scraper is in frictional contact with the inner hole of the guide ring.

[0019] As an optimized solution, the cleaning plate assembly further includes side scrapers fixed to the outer ends of the bottom scraper, the side scrapers being spirally arranged, and the outer wall of the side scrapers being in frictional contact with the inner wall of the processing cylinder shell.

[0020] As an optimized solution, the cleaning plate assembly further includes a top scraper fixed between the upper ends of the two side scrapers, the upper surface of the top scraper being in frictional contact with the lower surface of the filter screen.

[0021] As an optimized solution, a liquid distribution pipe is vertically fixed to the outside of the processing cylinder shell, and several connecting pipes corresponding to the alkaline liquid distribution ring shell are fixedly connected in parallel from top to bottom to the liquid distribution pipe.

[0022] As an optimized solution, the lower end of the flue gas inlet cylinder extends downward through the plug plate and is rotatably fitted with a flue gas inlet connecting cylinder.

[0023] As an optimized solution, a toothed ring is fixedly connected to the outer wall of the flue gas inlet cylinder, and a drive motor is fixedly connected to the lower surface of the plug plate. The output shaft of the drive motor meshes with the toothed ring through a gear.

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

[0025] By arranging multiple alkaline solution distribution rings side by side from top to bottom in the treatment cylinder shell, and using the surrounding atomizing heads to evenly atomize and spray the alkaline solution, the atomized alkaline solution is diffused throughout the treatment cylinder shell. The flue gas enters the cylinder and is then sprayed out, achieving uniform contact with the atomized alkaline solution, thereby improving the desulfurization and denitrification efficiency of the flue gas.

[0026] The rotating flue gas inlet cylinder uses diversion blades to increase the kinetic energy of the flue gas and disturb it, which can further improve the uniformity of contact with alkaline water droplets and improve desulfurization and denitrification efficiency.

[0027] By processing the filter screen located near the top of the casing, dust in the flue gas can be filtered out.

[0028] By setting up cleaning plates, dust and particulate matter adhering to the inner wall of the processing cylinder and the filter screen can be scraped off, collected through the material discharge cylinder, and 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-Processing cylinder shell; 2-Alkali solution distribution ring shell; 3-Atomizing head; 4-Distribution pipe; 5-Connecting pipe; 6-Filter screen; 7-Flue gas outlet; 8-Guide ring; 9-Bottom scraper; 10-Side scraper; 11-Top scraper; 12-Material discharge cylinder shell; 13-Flue gas inlet cylinder; 14-Flue gas inlet connecting cylinder; 15-Discharge cylinder; 16-Baffle plate; 17-Flue gas outlet; 18-Diverter blade. 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 desulfurization, dust removal, and denitrification device for a biomass boiler includes a treatment shell 1. Several alkaline solution distribution ring shells 2 are fixedly connected in parallel from top to bottom on the outer wall of the treatment shell 1. Corresponding to each alkaline solution distribution ring shell 2, several alkaline solution outlets are arranged circumferentially around the shell wall of the treatment shell 1 and are connected to it. An atomizing head 3 is fixedly connected inside each alkaline solution outlet.

[0034] A filter screen 6 is fixedly connected to the upper part of the processing cylinder shell 1. A cleaning plate assembly is rotatably provided inside the processing cylinder shell 1, which rubs against its inner wall and the lower surface of the filter screen 6.

[0035] A flue gas outlet 7 is fixedly connected to the upper end of the treatment shell 1, and the inlet end of the flue gas outlet 7 connects to the area between the filter screen 6 and the top of the treatment shell 1.

[0036] The lower end of the processing cylinder shell 1 is rotatably provided with a flue gas inlet cylinder 13, and the upper end of the flue gas inlet cylinder 13 is fixedly connected with a baffle plate 16. Several flue gas outlets 17 are provided on the outer wall of the flue gas inlet cylinder 13 near the upper end.

[0037] The shielding plate 16 can be used to prevent water droplets from entering the flue gas inlet 13.

[0038] A cone-shaped block is fixed to the top of the shielding plate 16 to guide the falling water droplets.

[0039] Several diverter blades 18 are fixedly attached to the lower surface of the shielding plate 16.

[0040] The lower end of the processing cylinder shell 1 is fixedly connected to a material outlet cylinder shell 12, and the lower end of the material outlet cylinder shell 12 is fixedly connected to a plug plate. The flue gas inlet cylinder 13 is coaxially and rotatably installed on the plug plate.

[0041] A discharge cylinder 15 is fixedly attached to the outer wall of the material discharge cylinder shell 12 at an angle downwards near the lower end.

[0042] A flow guide ring 8 is fixedly attached to the inner bottom surface of the processing cylinder shell 1. The inner hole of the flow guide ring 8 is gradually narrowed from top to bottom.

[0043] The cleaning plate assembly includes a bottom scraper 9 fixed to the outer wall of the flue gas inlet cylinder 13, and the lower surface of the bottom scraper 9 is in frictional contact with the inner hole of the guide ring 8.

[0044] The cleaning plate assembly also includes side scrapers 10 fixed to the outer end of the bottom scraper 9. The side scrapers 10 are spirally arranged, and the outer wall of the side scrapers 10 is in frictional contact with the inner wall of the processing cylinder shell 1.

[0045] The cleaning plate assembly also includes a top scraper 11 fixed between the upper ends of the two side scrapers 10, with the upper surface of the top scraper 11 in frictional contact with the lower surface of the filter screen 6.

[0046] A liquid distribution pipe 4 is vertically fixed to the outside of the treatment cylinder shell 1. Several connecting pipes 5, which are connected to the alkaline liquid distribution ring shell 2, are fixed in parallel from top to bottom to the liquid distribution pipe 4.

[0047] The lower end of the flue gas inlet cylinder 13 extends downward through the plug plate and is rotatably fitted with the flue gas inlet connecting cylinder 14.

[0048] A toothed ring is fixedly connected to the outer wall of the flue gas inlet cylinder 13, and a drive motor is fixedly connected to the lower surface of the plug plate. The output shaft of the drive motor meshes with the toothed ring through a gear.

[0049] The working principle of this device is as follows:

[0050] By arranging multiple alkaline solution distribution ring shells 2 in parallel from top to bottom in the treatment cylinder shell 1, and using the surrounding atomizing head 3 to uniformly atomize and spray out the alkaline solution, the atomized alkaline solution is diffused inside the treatment cylinder shell 1. The flue gas is then sprayed out through the flue gas inlet cylinder 13, achieving uniform contact with the atomized alkaline solution, thereby improving the desulfurization and denitrification efficiency of the flue gas.

[0051] The flue gas inlet cylinder 13 is rotated, and the diversion blades 18 increase the kinetic energy of the flue gas and disturb it, which can further improve the uniformity of contact with alkaline water droplets and improve the desulfurization and denitrification efficiency.

[0052] By processing the filter screen 6 located near the top of the casing 1, dust in the flue gas can be filtered out.

[0053] By setting up cleaning plates, dust and particulate matter adhering to the inner wall of the processing cylinder 1 and the filter screen 6 can be scraped off, collected through the material discharge cylinder 12, and discharged to the outside through the unloading cylinder 15, which is convenient and quick.

[0054] 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 desulfurization, dust removal, and denitrification device for a biomass boiler, characterized in that: The device includes a processing cylinder shell (1), on which several alkaline solution distribution ring shells (2) are fixedly connected in parallel from top to bottom on the outer wall of the processing cylinder shell (1). Corresponding to each of the alkaline solution distribution ring shells (2), several alkaline solution outlets are provided circumferentially around the cylinder wall of the processing cylinder shell (1) and communicate with it. An atomizing head (3) is fixedly connected to each of the alkaline solution outlets. A filter screen (6) is fixedly connected to the upper end of the processing cylinder (1), and a cleaning plate assembly is rotatably provided inside the processing cylinder (1) to rub against its inner wall and the lower surface of the filter screen (6).

2. The biomass boiler desulfurization, dust removal, and denitrification device according to claim 1, characterized in that: The upper end of the processing cylinder (1) is fixed with a flue gas outlet (7), and the inlet end of the flue gas outlet (7) is connected to the area between the filter screen (6) and the top of the processing cylinder (1).

3. The biomass boiler desulfurization, dust removal, and denitrification device according to claim 2, characterized in that: The lower end of the processing cylinder (1) is rotatably provided with a flue gas inlet cylinder (13), and the upper end of the flue gas inlet cylinder (13) is fixedly connected with a baffle plate (16). The outer wall of the flue gas inlet cylinder (13) near the upper end is provided with a plurality of flue gas outlets (17).

4. The biomass boiler desulfurization, dust removal, and denitrification device according to claim 3, characterized in that: The lower surface of the shielding disk (16) is surrounded and fixed with several diverter blades (18).

5. The biomass boiler desulfurization, dust removal, and denitrification device according to claim 4, characterized in that: The lower end of the processing cylinder (1) is fixedly connected to a material outlet cylinder (12), and the lower end of the material outlet cylinder (12) is fixedly connected to a plug plate. The flue gas inlet cylinder (13) is coaxially rotatably mounted on the plug plate.

6. The biomass boiler desulfurization, dust removal, and denitrification device according to claim 5, characterized in that: The material discharge cylinder (12) has a discharge cylinder (15) fixedly attached to its outer wall at an angle downwards near the lower end.

7. The biomass boiler desulfurization, dust removal, and denitrification device according to claim 6, characterized in that: A flow guide ring (8) is fixedly attached to the inner bottom surface of the processing cylinder shell (1), and the inner hole of the flow guide ring (8) is gradually narrowed from top to bottom.

8. The biomass boiler desulfurization, dust removal, and denitrification device according to claim 7, characterized in that: The cleaning plate assembly includes a bottom scraper (9) fixed to the outer wall of the flue gas inlet cylinder (13), and the lower surface of the bottom scraper (9) is in frictional contact with the inner hole of the guide ring (8).

9. The biomass boiler desulfurization, dust removal, and denitrification device according to claim 8, characterized in that: The cleaning plate assembly includes side scrapers (10) fixed to the outer end of the bottom scraper (9). The side scrapers (10) are arranged in a spiral shape, and the outer wall of the side scrapers (10) is in frictional contact with the inner wall of the processing cylinder shell (1).

10. The biomass boiler desulfurization, dust removal, and denitrification device according to claim 9, characterized in that: The cleaning plate assembly also includes a top scraper (11) fixed between the upper ends of the two side scrapers (10), the upper surface of the top scraper (11) being in frictional contact with the lower surface of the filter screen (6).

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