Boiler flue gas SCR (selective catalytic reduction) denitration and dust removal uniform distributor

Abstract

The utility model belongs to the technical field of catalyst dust removal, and particularly relates to a boiler flue gas SCR denitration dust removal uniform distributor which comprises a flue gas discharge pipe, an impurity removal assembly comprises a dust removal settling chamber communicated with the flue gas discharge pipe, a dust removal grating is connected in the dust removal settling chamber, and a soot blower is installed in the dust removal settling chamber. The soot blower and the dust removal grid are correspondingly arranged, the SCR reactor is connected to the bottom of the flue gas discharge pipe, a gas inlet port of the SCR reactor is communicated with the flue gas discharge pipe, and the ash discharge assembly is connected to the outer side of the dust removal settling chamber and is arranged corresponding to an ash discharge port of the dust removal settling chamber. Large particles and viscous substances in the flue gas are blocked on the surface of the dust removal grid, most dust is output to the dust discharge port along the inclination angle of the dust removal grid under the action of gravity, and a small part of unstripped dust is blown off by the installed soot blower regularly, so that the cleanliness of the input flue gas is ensured.

Description

Technical Field

[0001] This utility model relates to the field of catalyst dust removal technology, specifically a boiler flue gas SCR denitrification and dust removal uniform distributor. Background Technology

[0002] Boiler flue gas from biomass or sludge-fired boilers contains large amounts of viscous substances such as potassium and sodium ions, as well as large particulate dust. During selective catalytic reduction (SCR) reactions, these impurities are easily adsorbed onto the catalyst and are difficult to remove, leading to catalyst blockage and reduced catalyst activity (catalyst poisoning). Therefore, there is an urgent need for a boiler flue gas SCR denitrification and dust removal uniform distribution device. Utility Model Content

[0003] The purpose of this section is to outline some aspects of the embodiments of this utility model and to briefly introduce some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be used to limit the scope of this utility model.

[0004] Therefore, the purpose of this utility model is to provide a boiler flue gas SCR denitrification and dust removal uniform distributor. Through the dust removal grid, when the flue gas passes through, the flow rate slows down, and large particles and sticky substances in the flue gas are blocked on the surface of the dust removal grid. Most of the dust will be output to the ash discharge port along the inclined angle of the dust removal grid due to gravity. A small part of the unremoved dust will be blown off by the installed soot blower at regular intervals to ensure the cleanliness of the input flue gas.

[0005] To solve the above-mentioned technical problems, according to one aspect of the present invention, the present invention provides the following technical solution:

[0006] A boiler flue gas SCR denitrification and dust removal uniform distributor includes:

[0007] The flue gas exhaust pipe serves as a flue gas exhaust channel;

[0008] The impurity removal component is connected to the tail end of the flue gas discharge pipe, including a dust removal settling chamber connected to the flue gas discharge pipe, a dust removal grid connected to the dust removal settling chamber, and a soot blower installed in the dust removal settling chamber, with the soot blower and the dust removal grid being set accordingly.

[0009] The SCR reactor is connected to the bottom of the flue gas discharge pipe, and the SCR reactor inlet port is connected to the flue gas discharge pipe.

[0010] The ash discharge assembly is connected to the outside of the dust collection and settling chamber and is set accordingly to the ash discharge port of the dust collection and settling chamber.

[0011] As a preferred embodiment of the boiler flue gas SCR denitrification and dust removal uniform distributor described in this utility model, the dust removal grid is connected to the dust removal settling chamber in an inclined shape, and the soot blowing port of the soot blower is arranged parallel to the dust removal grid and is arranged above the dust removal grid.

[0012] As a preferred embodiment of the boiler flue gas SCR denitrification and dust removal uniform distributor described in this utility model, the ash discharge assembly includes an ash discharge hopper connected to the outside of the dust collection settling chamber, and a discharge pipe is connected to the bottom of the ash discharge hopper.

[0013] As a preferred embodiment of the boiler flue gas SCR denitrification and dust removal uniform distributor described in this utility model, the discharge pipe is connected to multiple sets of control valves that control the opening and closing state of the discharge pipe.

[0014] As a preferred embodiment of the boiler flue gas SCR denitrification and dust removal uniform distributor described in this utility model, the discharge pipe is arranged vertically to facilitate ash discharge.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] 1. With the dust removal grid in place, when the flue gas passes through, the flow rate slows down. Large particles and sticky substances in the flue gas are blocked on the surface of the dust removal grid. Most of the dust will be discharged to the ash discharge port along the tilt angle of the dust removal grid due to gravity. A small part of the dust that has not been removed will be blown off by the installed soot blower at regular intervals to ensure the cleanliness of the input flue gas.

[0017] 2. By using multiple valves located below the ash discharge hopper, the discharge pipe is continuously switched to prevent flue gas from escaping from the ash discharge hopper while ash is being discharged. Furthermore, due to the excellent flow guiding and distribution effect of the grid structure itself, the relatively clean flue gas can enter the SCR reactor evenly when passing through this device, thereby achieving better denitrification efficiency. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] In the diagram: 100 flue gas exhaust pipe, 200 impurity removal assembly, 210 dust removal settling chamber, 211 dust removal grid, 220 soot blower, 300 SCR reactor, 400 ash discharge assembly, 410 ash discharge hopper, 411 discharge pipe, 420 control valve. Detailed Implementation

[0021] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0022] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0023] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views showing the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, in actual manufacturing, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0025] This utility model provides a boiler flue gas SCR denitrification and dust removal uniform distribution device. Please refer to [link / reference]. Figure 1 It includes a flue gas discharge pipe 100, a cleaning component 200, an SCR reactor 300, and an ash discharge component 400;

[0026] Please continue reading. Figure 1 , the flue gas discharge pipe 100 serves as the flue gas discharge channel;

[0027] Please continue reading. Figure 1 The impurity removal component 200 is connected to the tail end of the flue gas discharge pipe 100, including a dust removal settling chamber 210 connected to the flue gas discharge pipe 100. A dust removal grid 211 is threadedly connected to the dust removal settling chamber 210 through a connecting bolt. A soot blower 220 is screwed into the dust removal settling chamber 210. The soot blower 220 is correspondingly arranged with the dust removal grid 211.

[0028] The dust removal grid 211 is connected to the dust removal settling chamber 210 in an inclined manner, and the blowing port of the soot blower 220 is arranged parallel to the dust removal grid 211 and is positioned above the dust removal grid 211.

[0029] When the flue gas passes through the dust removal grid 211, the flow rate slows down. Large particles and sticky substances in the flue gas are blocked on the surface of the dust removal grid 211. Most of the dust will be discharged to the ash discharge port along the tilt angle of the dust removal grid 211 due to gravity. A small part of the dust that has not been removed will be blown off by the installed soot blower at regular intervals.

[0030] Please continue reading. Figure 1 The SCR reactor 300 is connected to the bottom of the flue gas discharge pipe 100, and the air inlet of the SCR reactor 300 is connected to the flue gas discharge pipe 100.

[0031] Please continue reading. Figure 1 The ash discharge assembly 400 is connected to the outside of the dust collection settling chamber 210 and is set accordingly to the ash discharge port of the dust collection settling chamber 210;

[0032] The ash discharge assembly 400 includes an ash discharge hopper 410 connected to the outside of the dust collection settling chamber 210 via a connecting bolt. The bottom of the ash discharge hopper 410 is connected to a discharge pipe 411, and multiple sets of control valves 420 are connected to the discharge pipe 411 to control the opening and closing state of the discharge pipe 411.

[0033] By using multiple valves 420 located below the ash discharge hopper 410, the discharge pipe 411 is continuously switched to prevent flue gas from escaping from the ash discharge hopper 410 while ash is being discharged. Furthermore, since the grid structure itself has a good flow guiding and distribution effect, when passing through this device, the relatively clean flue gas can enter the SCR reactor 300 evenly, thereby achieving better denitrification efficiency.

[0034] Working principle: When this utility model is in use, the dust removal grid 211 slows down the flow rate of flue gas as it passes through. Large particles and sticky substances in the flue gas are blocked on the surface of the dust removal grid 211. Most of the dust will be discharged to the ash discharge port along the inclined angle of the dust removal grid 211 due to gravity. A small portion of the dust that has not been removed will be blown off by the installed soot blower at regular intervals. At the same time, multiple valves 420 installed below the ash discharge hopper 410 control the continuous switching of the discharge pipe 411 to prevent flue gas from escaping from the ash discharge hopper 410 while discharging ash. Moreover, since the grid structure itself has a good guiding and distributing effect, when passing through this device, the relatively clean flue gas can enter the SCR reactor 300 evenly, thereby achieving better denitrification efficiency.

[0035] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A boiler flue gas SCR denitrification and dust removal uniform distributor, characterized in that, include: The flue gas exhaust pipe (100) serves as a flue gas exhaust channel; The dust removal assembly (200) is connected to the tail end of the flue gas discharge pipe (100) and includes a dust removal settling chamber (210) connected to the flue gas discharge pipe (100). A dust removal grid (211) is connected inside the dust removal settling chamber (210), and a soot blower (220) is installed inside the dust removal settling chamber (210). The soot blower (220) is correspondingly arranged with the dust removal grid (211). The SCR reactor (300) is connected to the bottom of the flue gas discharge pipe (100), and the inlet port of the SCR reactor (300) is connected to the flue gas discharge pipe (100). The ash discharge assembly (400) is connected to the outside of the dust collection settling chamber (210) and is set to correspond to the ash discharge port of the dust collection settling chamber (210).

2. The boiler flue gas SCR denitrification and dust removal uniform distributor according to claim 1, characterized in that, The dust removal grid (211) is connected to the dust removal settling chamber (210) in an inclined manner, and the blowing port of the soot blower (220) is arranged parallel to the dust removal grid (211) and is positioned above the dust removal grid (211).

3. The boiler flue gas SCR denitrification and dust removal uniform distributor according to claim 1, characterized in that, The ash discharge assembly (400) includes an ash discharge hopper (410) connected to the outside of the dust removal settling chamber (210), and a discharge pipe (411) is connected to the bottom of the ash discharge hopper (410).

4. The boiler flue gas SCR denitrification and dust removal uniform distributor according to claim 3, characterized in that, Multiple control valves (420) are connected to the discharge pipe (411) to control the opening and closing state of the discharge pipe (411).

5. A boiler flue gas SCR denitrification and dust removal uniform distributor according to claim 3, characterized in that, To facilitate ash discharge, the discharge pipe (411) is arranged vertically.

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