A mechanism for powder injection on a flue

Abstract

The utility model relates to a kind of powder spraying mechanism on flue, including powder conveying pipeline, powder spraying main pipe, powder spraying branch pipe and flue;The powder conveying pipeline and powder spraying main pipe are connected by large radius elbow, diaphragm pressure transmitter is configured in the end side edge position of large radius elbow of powder spraying main pipe, diaphragm pressure transmitter is used to monitor the pressure in powder conveying pipeline, as the basis for judging whether pipeline is blocked, spherical distributor is installed in the end of powder spraying main pipe away from large radius elbow, and two passages are branched out by spherical distributor. Through the above-mentioned powder spraying mechanism, the mixture of calcium powder and flue gas can be quickly and uniformly mixed, greatly improving the utilization rate of excess calcium powder in flue gas, saving the operation cost of calcium-based desulfurization device, and playing a positive role in the efficient operation of the desulfurization device.

Description

Technical Field

[0001] This utility model belongs to the technical field, specifically a powder spraying mechanism for flues. Background Technology

[0002] In calcium-based desulfurization, powdered hydrated lime needs to be blown into the inlet flue of the dust collector. In order to improve the utilization rate of hydrated lime, in addition to ensuring the contact time between calcium powder and flue gas, it is also necessary to ensure the uniformity of calcium powder mixing. Conventional calcium powder injection devices have poor mixing uniformity and need to be improved.

[0003] In view of this, a powder spraying mechanism for flue gas is proposed. Utility Model Content

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe 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 construed as limiting the scope of the present invention.

[0005] Given the following technical problems in the existing technology: In calcium-based desulfurization, powdered hydrated lime needs to be blown into the inlet flue of the dust collector. In order to improve the utilization rate of hydrated lime, in addition to ensuring the contact time between calcium powder and flue gas, it is also necessary to ensure the uniformity of calcium powder mixing. Conventional calcium powder injection devices have poor mixing uniformity and need to be improved.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a powder injection mechanism for a flue, comprising a powder delivery pipe, a powder injection main pipe, a powder injection branch pipe, and a flue;

[0007] The powder feeding pipe and the powder spraying main pipe are connected by a large-radius elbow. A diaphragm pressure transmitter is installed on the side of the powder spraying main pipe near the large-radius elbow. The diaphragm pressure transmitter is used to monitor the pressure inside the powder feeding pipe and to determine whether the pipe is blocked. A spherical distributor is installed at the end of the powder spraying main pipe away from the large-radius elbow, and the spherical distributor branches into two channels.

[0008] The upper and lower inner edges of the flue are symmetrically connected with powder injection branch pipes. A nozzle is installed on the opposite surface of a pair of powder injection branch pipes. The nozzle is a fan-shaped flat nozzle with a diffusion angle of 90-120 degrees. The nozzle is made of wear-resistant ductile iron. Several nozzles are arranged on the powder injection branch pipe at 600mm intervals. The nozzles on the upper and lower powder injection branch pipes are arranged at equal intervals. A wear-resistant cover is installed on the windward side of a pair of powder injection branch pipes. The wear-resistant cover is "V" shaped and is made of thickened angle steel of 16Mn wear-resistant material.

[0009] As a preferred technical solution for a powder spraying mechanism on a flue, a sleeve seat is fixedly installed on the inner edge of one side of the flue, and the outer contour dimension of the powder spraying branch pipe is adapted to the inner edge dimension of the sleeve seat, which facilitates the positioning and installation of one end of the powder spraying branch pipe.

[0010] As a preferred technical solution for a powder spraying mechanism on a flue, a sleeve A is installed on the outer side of the flue away from the sleeve seat, the powder spraying branch pipe passes through the sleeve A, and the end of the sleeve A away from the flue is connected to a sleeve positive flange.

[0011] As a preferred technical solution for a powder injection mechanism on a flue, a sleeve reverse flange is installed on the outer periphery of the end of the powder injection branch pipe near the sleeve positive flange. The specifications of the sleeve reverse flange are compatible with those of the sleeve positive flange, which facilitates stable connection between the powder injection branch pipe and the sleeve positive flange.

[0012] As a preferred technical solution for a powder spraying mechanism on a flue, the end of the powder spraying branch pipe facing the powder spraying main pipe is connected to a branch pipe flange, and the branch pipe flange is connected to one end of the powder spraying main pipe.

[0013] The beneficial effects of this utility model are as follows: Through the above-mentioned powder spraying mechanism, the calcium powder can be quickly and evenly mixed with the flue gas, which greatly improves the utilization rate of excess calcium powder in the flue gas, saves the operating cost of the calcium-based desulfurization device, and plays a positive role in the efficient operation of the desulfurization device.

[0014] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained by means of the structures particularly pointed out in the description and the drawings. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. 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:

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2 This utility model is based on Figure 1 Schematic diagram at point A in the middle.

[0018] Figure 3 This utility model is based on Figure 1 Schematic diagram at point C.

[0019] Figure 4 This is a schematic diagram of the flue of this utility model.

[0020] Figure 5 This is a schematic diagram of the anti-wear cover of this utility model.

[0021] Figure label:

[0022] 100. Powder delivery pipe; 101. Large radius elbow; 102. Main powder spraying pipe; 200. Powder spraying branch pipe; 201. Nozzle; 202. Wear-resistant cover; 203. Branch pipe flange; 204. Sleeve reverse flange; 300. Spherical distributor; 400. Flue; 401. Sleeve seat; 402. Sleeve A; 403. Sleeve positive flange; 500. Diaphragm pressure transmitter. Detailed Implementation

[0023] 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.

[0024] 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.

[0025] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single embodiment or an embodiment selectively excluded from other embodiments.

[0026] 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 illustrating the device structure may be partially enlarged, not adhering 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, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0027] Example, refer to Figures 1 to 5 A powder spraying mechanism for a flue includes a powder feeding pipe 100, a powder spraying main pipe 102, a powder spraying branch pipe 200, and a flue 400.

[0028] The powder conveying pipe 100 and the powder spraying main pipe 102 are connected by a large radius elbow 101. A diaphragm pressure transmitter 500 is installed on the side of the powder spraying main pipe 102 near the large radius elbow 101. The diaphragm pressure transmitter 500 is used to monitor the pressure in the powder conveying pipe and to determine whether the pipe is blocked. A ball distributor 300 is installed at the end of the powder spraying main pipe 102 away from the large radius elbow 101, and the ball distributor 300 branches into two channels.

[0029] The upper and lower inner edges of the flue 400 are symmetrically connected with powder injection branch pipes 200. Nozzles 201 are installed on the opposite surfaces of each pair of powder injection branch pipes 200. The nozzles 201 are fan-shaped flat nozzles with a diffusion angle designed to be 90-120 degrees. The nozzles 201 are made of wear-resistant ductile iron. Several nozzles 201 are arranged at 600mm intervals on each powder injection branch pipe 200. The nozzles 201 on the upper and lower layers of powder injection branch pipes 201 are arranged at equal intervals. Wear-resistant covers 202 are installed on the windward side of each pair of powder injection branch pipes 200. Furthermore, the wear-resistant cover 202 is V-shaped and is made of thickened angle steel of 16Mn wear-resistant material; a sleeve reverse flange 204 is installed on the outer periphery of the end of the powder spraying branch pipe 200 near the sleeve positive flange 403. The sleeve reverse flange 204 is compatible with the specifications of the sleeve positive flange 403, which facilitates the stable connection between the powder spraying branch pipe 200 and the sleeve positive flange 403; the end of the powder spraying branch pipe 200 facing the powder spraying main pipe 102 is connected to the branch flange 203, and the branch flange 203 is connected to one end of the powder spraying main pipe 102.

[0030] A sleeve seat 401 is fixedly installed on the inner edge of one side of the flue 400. The outer contour dimension of the powder spraying branch pipe 200 is adapted to the inner edge dimension of the sleeve seat 401, which facilitates the positioning and installation of one end of the powder spraying branch pipe 200. A sleeve A402 is installed on the outer side of the flue 400 away from the sleeve seat 401. The powder spraying branch pipe 200 passes through the sleeve A402. The end of the sleeve A402 away from the flue 400 is connected to a sleeve flange 403.

[0031] This implementation achieves the following: when calcium powder is transported from the powder hopper to the main powder injection pipe 102 by a Roots blower, the main powder injection pipe 102 distributes the powder to the upper and lower powder injection branch pipes 200 of the flue 400 via a spherical distributor 300. After reaching the powder injection branch pipe 200, the powder is sprayed out vertically from the flue gas cross section by nozzles 201 arranged at equal intervals. Since the nozzles 201 are flat nozzles, the calcium powder spreads out in a fan-shaped plane under the action of the airflow when passing through the nozzles 201. Several intersecting fan-shaped planes occupy the entire cross section of the flue 400, greatly increasing the overlapping area of ​​the calcium powder and increasing the full contact between the flue gas and the calcium powder, thereby improving the utilization rate of the calcium powder absorbed by the flue gas. Through the "V"-shaped anti-wear cover 202, the flue gas blown from the inlet of the flue 400 onto the powder injection branch pipe 200 can be reversed, thus providing protection for the powder injection branch pipe 200.

[0032] It should be understood that numerous specific implementation decisions can be made during the development of any actual implementation method, and in any engineering or design project. Such development efforts may be complex and time-consuming, but for those of ordinary skill in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0033] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A powder spraying mechanism for a flue, characterized in that: It includes a powder delivery pipe (100), a powder injection main pipe (102), a powder injection branch pipe (200), and a flue (400); The powder feeding pipe (100) and the powder spraying main pipe (102) are connected by a large radius elbow (101). A diaphragm pressure transmitter (500) is arranged on the side of the powder spraying main pipe (102) near the large radius elbow (101). A ball distributor (300) is installed on the end of the powder spraying main pipe (102) away from the large radius elbow (101), and the ball distributor (300) branches into two channels. The flue (400) is symmetrically connected with powder spraying branch pipes (200) on its upper and lower inner edges. A nozzle (201) is installed on the opposite surface of a pair of powder spraying branch pipes (200). The nozzles (201) on the upper and lower powder spraying branch pipes (200) are arranged at equal intervals. A wear-resistant cover (202) is installed on the windward side of a pair of powder spraying branch pipes (200), and the wear-resistant cover (202) is V-shaped.

2. The powder spraying mechanism on the flue according to claim 1, characterized in that: A sleeve seat (401) is fixedly installed on the inner edge of one side of the flue (400), and the outer contour dimension of the powder spraying branch pipe (200) is adapted to the inner edge dimension of the sleeve seat (401).

3. The powder spraying mechanism on the flue according to claim 1, characterized in that: A sleeve A (402) is installed on the outer side of the flue (400) away from the sleeve seat (401). The powder spraying branch pipe (200) passes through the sleeve A (402). The end of the sleeve A (402) away from the flue (400) is connected to a sleeve flange (403).

4. The powder spraying mechanism on the flue according to claim 1, characterized in that: A sleeve reverse flange (204) is installed on the outer periphery of the end of the powder spraying branch pipe (200) near the sleeve positive flange (403), and the sleeve reverse flange (204) is compatible with the specifications of the sleeve positive flange (403).

5. The powder spraying mechanism on the flue according to claim 1, characterized in that: The powder spraying branch pipe (200) is connected to a branch pipe flange (203) at one end facing the powder spraying main pipe (102), and the branch pipe flange (203) is connected to one end of the powder spraying main pipe (102).

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