Flue gas denitration equipment for high bauxite calcination

Abstract

The utility model relates to the technical field of flue gas denitration, in particular to flue gas denitration equipment for calcining high-alumina bauxite, which comprises an SCR (selective catalytic reduction) denitration reactor and a flue gas inlet component, and the flue gas inlet component is mounted at a gas inlet end at the upper end of the SCR denitration reactor; wherein the smoke inlet assembly comprises a smoke inlet box, a smoke inlet pipeline and an activated carbon filter screen, the lower end of the smoke inlet box is fixedly communicated with a smoke outlet pipeline, the other end of the smoke outlet pipeline is fixedly communicated with the air inlet end of the SCR denitration reactor, one end of the smoke inlet pipeline is fixedly communicated with the right end of the smoke inlet box, and the activated carbon filter screen is installed in the smoke inlet pipeline; the activated carbon filter screen is located between the smoke inlet pipeline and the smoke outlet pipeline, the smoke inlet assembly further comprises a gas flow sensor, and the gas flow sensor is fixedly installed at the upper end of the smoke inlet box. According to the SCR denitration reactor, the problem that a catalyst in the SCR denitration reactor is easily blocked by dust in flue gas generated by firing high-alumina bauxite can be effectively avoided, and the activated carbon filter screen can be cleaned and maintained in time.

Description

Technical Field

[0001] This utility model relates to the field of flue gas denitrification technology, and in particular to a flue gas denitrification device for calcining high-alumina bauxite. Background Technology

[0002] High-alumina bauxite, also known as high-alumina material, is mainly composed of gibbsite and high-alumina silica. The gibbsite content increases with the ratio of aluminum oxide to silicon dioxide. The minor minerals are rutile, succinate, etc., and sometimes small amounts of Baume and dickite are also present.

[0003] With the acceleration of industrialization, the demand and production of high-alumina bauxite have increased. During the calcination of high-alumina bauxite, a large amount of nitrogen oxides are generated and discharged with the flue gas. Therefore, it is necessary to use denitrification equipment to treat the flue gas discharged. Existing technology usually uses SCR denitrification reactors to treat the discharged flue gas for denitrification.

[0004] The existing flue gas denitrification equipment has the following problem: it does not have the function of pre-treating the flue gas before denitrification. However, the flue gas produced by high alumina bauxite calcination has a high dust content. If the flue gas is not pre-treated, the catalyst in the SCR denitrification reactor is easily blocked by dust. Therefore, a flue gas denitrification equipment for high alumina bauxite calcination is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a flue gas denitrification device for calcining high-alumina bauxite to solve the problems mentioned in the background art.

[0006] The technical solution adopted in this utility model is:

[0007] A flue gas denitrification device for calcining high-alumina bauxite includes:

[0008] SCR denitrification reactor;

[0009] The flue gas inlet assembly is installed at the upper air inlet end of the SCR denitrification reactor;

[0010] The smoke inlet assembly includes:

[0011] The smoke inlet box has a smoke outlet pipe fixedly connected to its lower end, and the other end of the smoke outlet pipe is fixedly connected to the air inlet of the SCR denitrification reactor.

[0012] One end of the smoke inlet pipe is fixedly connected to the right end of the smoke inlet box;

[0013] An activated carbon filter screen is installed inside the flue gas inlet pipe, located between the flue gas inlet pipe and the flue gas outlet pipe.

[0014] Optionally, the smoke inlet assembly further includes:

[0015] A gas flow sensor is fixedly installed at the upper end of the smoke inlet box. The lower end of the sensing end of the gas flow sensor passes through the upper end of the smoke inlet box and extends into the inside of the smoke inlet box. The gas flow sensor is located between the activated carbon filter and the smoke outlet pipe.

[0016] Optionally, the smoke inlet assembly further includes:

[0017] The alarm is fixedly installed at the top of the smoke inlet box;

[0018] The controller is fixedly installed at the left end of the smoke inlet box.

[0019] Optionally, the gas flow sensor is electrically connected to the controller, and the controller is electrically connected to the alarm.

[0020] Optionally, the smoke inlet assembly further includes:

[0021] Two electric push rods are provided, and the two electric push rods are symmetrically fixedly installed at the front and rear ends of the smoke inlet box;

[0022] Two L-shaped mounting plates are provided, and the two L-shaped mounting plates are respectively fixed to the upper end of the output end of the two electric push rods;

[0023] The mounting plate is fixedly installed between the tops of the two L-shaped mounting plates, and the mounting plate is located on the upper surface of the smoke inlet box.

[0024] Optionally, the smoke inlet assembly further includes:

[0025] The mounting slot is located at the lower end of the mounting plate, and the upper end of the activated carbon filter passes through the upper end of the smoke inlet box and is connected to the mounting slot.

[0026] Optionally, the smoke inlet assembly further includes:

[0027] The first magnet plate is fixedly installed on the upper end of the activated carbon filter screen;

[0028] The second magnet plate is fixedly installed inside the top of the mounting slot.

[0029] Optionally, the first magnet plate is magnetically attached to the lower end of the second magnet plate.

[0030] Compared with the prior art, the beneficial effects of this utility model are:

[0031] In operation, the flue gas denitrification equipment for high-alumina bauxite calcination introduces the flue gas generated during calcination into the flue gas inlet chamber via an inlet pipe. The flue gas undergoes dust removal and filtration via an activated carbon filter. The dust-removed flue gas then enters the SCR denitrification reactor for denitrification treatment. This design effectively prevents dust in the flue gas from calcining high-alumina bauxite from clogging the catalyst in the SCR denitrification reactor.

[0032] When using this type of flue gas denitrification equipment for high-alumina bauxite calcination, a minimum value is first set for the controller. The gas flow sensor collects the flow information of the filtered flue gas and transmits it to the controller. The controller converts the gas flow information into data and compares it with the minimum value. When the data is less than or equal to the minimum value, it indicates that the activated carbon filter is severely clogged. At this time, the controller sends a command to the alarm, and the alarm will start. The operator can then activate the electric push rod, which will move the mounting plate upward. The upward-moving mounting plate can lift the activated carbon filter from the flue gas inlet box. After the activated carbon filter is completely removed from the flue gas inlet box, the activated carbon filter is pulled down, separating the first magnet plate from the second magnet plate, thus completing the disassembly of the activated carbon filter from the mounting plate, which facilitates timely cleaning and maintenance of the activated carbon filter. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the structure of this application;

[0035] Figure 2 This is a schematic diagram of the smoke inlet assembly in this application;

[0036] Figure 3 This is a cross-sectional view of the smoke inlet assembly in this application;

[0037] Figure 4 This is a partial structural diagram of the smoke inlet assembly in this application;

[0038] Figure 5 This is a partial exploded view of the smoke inlet assembly in this application.

[0039] Figure label:

[0040] 1. SCR denitrification reactor; 2. Flue gas inlet assembly;

[0041] 201. Smoke inlet box; 202. Alarm; 203. Gas flow sensor; 204. Mounting plate; 205. Smoke inlet pipe; 206. L-shaped mounting plate; 207. Electric push rod; 208. Smoke outlet pipe; 209. Controller; 210. Activated carbon filter; 211. First magnet plate; 212. Second magnet plate; 213. Mounting slot. Detailed Implementation

[0042] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0043] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0044] like Figure 1-3 As shown, this utility model embodiment provides a flue gas denitrification device for high alumina bauxite calcination, including an SCR denitrification reactor 1 and a flue gas inlet assembly 2, wherein the flue gas inlet assembly 2 is installed at the upper air inlet end of the SCR denitrification reactor 1.

[0045] The smoke inlet assembly 2 includes a smoke inlet box 201, a smoke inlet pipe 205, and an activated carbon filter 210. The lower end of the smoke inlet box 201 is fixedly connected to a smoke outlet pipe 208, and the other end of the smoke outlet pipe 208 is fixedly connected to the air inlet of the SCR denitrification reactor 1. One end of the smoke inlet pipe 205 is fixedly connected to the right end of the smoke inlet box 201. The activated carbon filter 210 is installed inside the smoke inlet pipe 205 and is located between the smoke inlet pipe 205 and the smoke outlet pipe 208.

[0046] The flue gas generated from the calcination of high-alumina bauxite first enters the flue gas inlet assembly 2 for dust removal. The flue gas after dust removal can then enter the SCR denitrification reactor 1 for denitrification. The SCR denitrification reactor 1 is based on the authorized patent with application number 202022392501.2, which is prior art. Therefore, its specific structure and denitrification principle will not be described in detail here.

[0047] In this embodiment, the smoke inlet assembly 2 also includes a gas flow sensor 203. The gas flow sensor 203 is fixedly installed on the upper end of the smoke inlet box 201. The lower end of the sensing end of the gas flow sensor 203 passes through the upper end of the smoke inlet box 201 and extends into the interior of the smoke inlet box 201. The gas flow sensor 203 is located between the activated carbon filter screen 210 and the smoke outlet pipe 208.

[0048] The smoke inlet assembly 2 also includes an alarm 202 and a controller 209. The alarm 202 is fixedly installed on the upper end of the smoke inlet box 201, and the controller 209 is fixedly installed on the left end of the smoke inlet box 201.

[0049] The gas flow sensor 203 is electrically connected to the controller 209, and the controller 209 is electrically connected to the alarm 202.

[0050] The flue gas generated from the calcination of high-alumina bauxite enters the flue gas box 201 through the flue gas inlet pipe 205, and can be filtered for dust removal by the activated carbon filter screen 210.

[0051] First, a minimum value is set for the controller 209. The gas flow sensor 203 collects the flow information of the filtered flue gas and transmits it to the controller 209. The controller 209 is a general-purpose SC200 controller. The controller 209 converts the gas flow information into data and compares it with the minimum value. When the data is less than or equal to the minimum value, it indicates that the activated carbon filter 210 is severely clogged. At this time, the controller 209 can send a command to the alarm 202, and the alarm 202 can start to sound the alarm.

[0052] like Figure 3-5 As shown, the smoke inlet assembly 2 also includes an electric push rod 207, an L-shaped mounting plate 206, and a mounting plate 204. There are two electric push rods 207, which are symmetrically fixed at the front and rear ends of the smoke inlet box 201. There are two L-shaped mounting plates 206, which are respectively fixed to the upper ends of the output ends of the two electric push rods 207. The mounting plate 204 is fixedly installed between the tops of the two L-shaped mounting plates 206, and the mounting plate 204 is located on the upper surface of the smoke inlet box 201.

[0053] The smoke inlet assembly 2 also includes an installation groove 213, which is located at the lower end of the mounting plate 204. The upper end of the activated carbon filter 210 passes through the upper end of the smoke inlet box 201 and is connected to the installation groove 213.

[0054] The smoke inlet assembly 2 also includes a first magnet plate 211 and a second magnet plate 212. The first magnet plate 211 is fixedly installed on the upper end of the activated carbon filter 210, and the second magnet plate 212 is fixedly installed on the top of the inside of the mounting groove 213. The first magnet plate 211 is magnetically attracted to the lower end of the second magnet plate 212.

[0055] The operator can activate the electric push rod 207, which will move the mounting plate 204 upward. The upward-moving mounting plate 204 can lift the activated carbon filter 210 out of the smoke inlet box 201. After the activated carbon filter 210 is completely removed from the smoke inlet box 201, the activated carbon filter 210 is pulled down, which separates the first magnet plate 211 from the second magnet plate 212, thereby completing the disassembly of the activated carbon filter 210 and the mounting plate 204, which facilitates timely cleaning and maintenance of the activated carbon filter 210.

[0056] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A flue gas denitration apparatus for high bauxite calcination, characterized by, include: SCR denitrification reactor (1); flue gas inlet assembly (2), installed at the upper air inlet end of SCR denitrification reactor (1); wherein, the flue gas inlet assembly (2) includes: flue gas inlet box (201), the lower end of which is fixedly connected to a flue gas outlet pipe (208), the other end of which is fixedly connected to the air inlet end of SCR denitrification reactor (1); flue gas inlet pipe (205), one end of which is fixedly connected to the right end of flue gas inlet box (201); activated carbon filter (210), installed in flue gas inlet pipe (205), the activated carbon filter (210) being located between flue gas inlet pipe (205) and flue gas outlet pipe (208).

2. The flue gas denitration apparatus for calcining high bauxite according to claim 1, characterized by The smoke inlet assembly (2) further includes a gas flow sensor (203), which is fixedly installed on the upper end of the smoke inlet box (201). The lower end of the sensing end of the gas flow sensor (203) passes through the upper end of the smoke inlet box (201) and extends into the inside of the smoke inlet box (201). The gas flow sensor (203) is located between the activated carbon filter (210) and the smoke outlet pipe (208).

3. The flue gas denitration apparatus for bauxite calcination according to claim 2, characterized by The smoke inlet assembly (2) further includes: an alarm (202), which is fixedly installed on the upper end of the smoke inlet box (201); and a controller (209), which is fixedly installed on the left end of the smoke inlet box (201).

4. The flue gas denitrification equipment for high-alumina bauxite calcination according to claim 3, characterized in that, The gas flow sensor (203) is electrically connected to the controller (209), and the controller (209) is electrically connected to the alarm (202).

5. The flue gas denitration apparatus for bauxite calcination according to claim 1, characterized by The smoke inlet assembly (2) further includes: two electric push rods (207), which are symmetrically fixed at the front and rear ends of the smoke inlet box (201); two L-shaped mounting plates (206), which are respectively fixed at the upper end of the output end of the two electric push rods (207); and a mounting plate (204), which is fixedly installed between the tops of the two L-shaped mounting plates (206), and the mounting plate (204) is located on the upper surface of the smoke inlet box (201).

6. The flue gas denitration apparatus for bauxite calcination according to claim 5, characterized by The smoke inlet assembly (2) further includes: an installation groove (213) located at the lower end of the installation plate (204), wherein the upper end of the activated carbon filter (210) passes through the upper end of the smoke inlet box (201) and is connected to the installation groove (213).

7. The flue gas denitration apparatus for bauxite calcination according to claim 6, characterized by The smoke inlet assembly (2) further includes: a first magnet plate (211), which is fixedly installed on the upper end of the activated carbon filter (210); and a second magnet plate (212), which is fixedly installed on the top of the inside of the mounting groove (213).

8. The flue gas denitrification equipment for high-alumina bauxite calcination according to claim 7, characterized in that, The first magnet plate (211) is magnetically attracted to the lower end of the second magnet plate (212).

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