Method and structure for enhancing pneumatic conveying fluidization effect

Abstract

The invention relates to the field of coal ash conveying equipment, in particular to a structure for enhancing the pneumatic conveying fluidization effect, which comprises a fluidization core arranged in an output pipe of an air supply device and an air supply pipe arranged at one end of the air supply device, the fluidization core is arranged in a frustum shape, and fluidization blades are fixedly connected to the circumferential side wall of the fluidization core. The thickness of the fluidization blades is gradually reduced from the small-size end of the fluidization core to the large-size end of the fluidization core, the fluidization blades are arranged in an inclined mode, the included angle between the fluidization blades and the axis of the fluidization core is any numerical value ranging from 30 degrees to 45 degrees, and the fluidization blades are smoothly sunken in the inclined direction with the center as the sunken point; the multiple fluidization blades are evenly distributed along the circumferential side face of the fluidization core, the adjacent fluidization blades are parallel to each other, the side face, away from the fluidization core, of each fluidization blade is fixedly connected into the output pipe in a welded mode, the axis of the fluidization core and the axis of the output pipe are collinear, and the purposes of reducing the air supply frequency and improving the air supply efficiency are achieved. And energy is saved.

Description

Technical Field

[0001] The invention relates to the technical field of fly ash conveying equipment, and in particular to a structure for enhancing the fluidization effect of pneumatic conveying. Background Art

[0002] Pneumatic ash conveying refers to a technology that uses compressed air to transport fly ash generated by boilers and other systems to ash storage or slag bins for unified treatment. Currently, most ash conveying systems have not undergone systematic reconstruction and upgrades, and still use the more traditional high-pressure dilute phase transportation mode, or relatively energy-saving double-pipe transportation or small bin pump transportation. Taking the high-pressure dilute phase transportation mode as an example, this mode adopts the transportation method of high-pressure suspended flow, so that the fly ash is pressurized and fluidized in the bin pump, suspended in the ash pipe, and transported to the slag bin at the end of the pipeline along with the high-pressure airflow.

[0003] During the operation of high-pressure suspended flow ash conveying, it is necessary to pressurize the silo pump to make the fly ash enter a fluidized state, and a continuous supply of high-pressure airflow is also required in the ash conveying pipeline to ensure the stable operation of the system. During the transportation process, when the fly ash passes through the pipeline position where the pressure drops (such as elbows, climbing section pipelines, etc.), it is very easy for the fly ash to settle and accumulate in the pipeline, causing blockage.

[0004] In order to avoid this situation, the current pneumatic conveying system generally chooses to add several air replenishers with output pipes at the locations of elbows and long straight pipe sections. The air replenisher will replenish air into the ash conveying pipeline according to the set program during the fly ash operation process. The high-pressure airflow injected into the ash conveying pipeline through the output pipe will disturb the settled fly ash, thereby causing the fly ash to churn and fluidize again and maintain a conveyable state.

[0005] The above prior art has the following defects:

[0006] Although the air supply system is an indispensable part of pneumatic conveying, frequent air supply or too many air supply system settings will lead to waste of compressed air and energy during its overall use. Summary of the invention

[0007] The purpose of the present invention is to provide a structure for enhancing the fluidization effect of pneumatic conveying, thereby reducing the number of air replenishment times and saving energy, so as to solve the problems raised in the above-mentioned background technology.

[0008] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions:

[0009] A structure for enhancing the fluidization effect of pneumatic conveying, comprising a fluidizing core arranged in an output pipe of an air replenisher, an air replenishing pipe arranged at one end of the air replenisher, the fluidizing core being arranged in a frustum shape, and fluidizing blades being fixedly connected to the circumferential side walls of the fluidizing core, the thickness of the fluidizing blades gradually decreasing from the end of the fluidizing core with a smaller size to the end of the fluidizing core with a larger size, the fluidizing blades being arranged obliquely, the angle between the fluidizing blades and the axis of the fluidizing core being any value between 30 degrees and 45 degrees, the fluidizing blades being smoothly concave in the inclined direction with the center as a concave point, and the fluidizing blades being arranged in an arc shape as a whole; a plurality of fluidizing blades are arranged in the fluidizing blades, the plurality of fluidizing blades are evenly distributed along the circumferential side of the fluidizing core, adjacent fluidizing blades are parallel to each other, the side of each fluidizing blade away from the fluidizing core is fixedly connected to the output pipe by welding, and the axis of the fluidizing core is collinear with the axis of the output pipe.

[0010] As a preferred embodiment of the present invention, the number of the fluidizing blades is any value between six and eleven.

[0011] As a preferred embodiment of the present invention, a fluidizing air duct is opened on the circumferential side surface of the fluidizing core, the fluidizing air duct is arranged in an arc shape, and the bending direction of the fluidizing air duct is consistent with the concave direction of the fluidizing blades.

[0012] As a preferred embodiment of the present invention, a fluidizing air duct is provided between each adjacent fluidizing blade.

[0013] A method for using a structure for enhancing the fluidization effect of pneumatic conveying, wherein the structure for enhancing the fluidization effect of pneumatic conveying as described above is selected, and the specific method is as follows:

[0014] S1: Multiple fluidizing blades are fixed one by one in the output pipe by welding at the half of the output pipe, and the axis of the fluidizing core is kept in a collinear state with the axis of the output pipe;

[0015] S2: When fixing the fluidizing core, set the larger side of the fluidizing core as the windward side;

[0016] S3: Adjust the angle between the output pipe and the ash conveying pipeline so that the angle between the output pipe and the ash conveying pipeline is any angle between 20 degrees and 45 degrees;

[0017] S4: connect the output pipe to the ash conveying pipeline so that the smaller side of the fluidizing core faces the ash conveying pipeline;

[0018] S5: Fix the output pipe to the ash conveying pipe by welding.

[0019] Beneficial Effects

[0020] The beneficial effects of the present invention are:

[0021] The shape characteristics of the fluidizing core and the structural characteristics of the fluidizing blades form a channel structure that is first wide and then narrow in the output pipe, and the concave and inclined characteristics of the fluidizing blades produce a deflected arc-shaped flow channel in the axial direction of the output pipe. After the compressed gas passes through such a flow channel, it will rotate in the flow direction, thus forming a vortex. And because the flow channel becomes narrower from wide, the gas flow rate remains unchanged, thereby increasing the gas flow rate passing through the unit area in the same time, thereby increasing the gas flow rate. As a result, the same volume of compressed air has a greater turbulent effect on the running materials inside the ash pipe, improving the effect of the air replenisher for a single air replenishment work, increasing the action length and intensity of a single air replenisher, and then increasing the layout interval of the air replenishment equipment, reducing the number of air replenishers and the number of air replenishment times, thereby reducing the number of air replenishments, reducing gas consumption and reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0023] Figure 1 It is a schematic diagram of the structure of the fluidizing core and the fluidizing blades from a top view;

[0024] Figure 2 It is a schematic diagram of the structure of the side angle of the fluidizing core and the fluidizing blades;

[0025] Figure 3 It is a schematic diagram of the three-dimensional structure of the fluidizing core and the fluidizing blades;

[0026] Figure 4 It is a structural schematic diagram of the present invention in use;

[0027] Figure 5 It is a schematic diagram of the cross-sectional structure of the output tube when the present invention is in use;

[0028] Figure 6 This is a diagram of airflow detection in the ash conveying pipeline after the present invention is used.

[0029] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0030] 1. Fluidizing core; 2. Fluidizing blades; 3. Fluidizing air duct; 4. Air replenisher; 41. Air replenishing pipe. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Example 1

[0033] See also Figure 1-6 As shown, a structure for enhancing the fluidization effect of pneumatic conveying includes a fluidizing core 1 arranged in the output pipe of the air replenisher 4, and an air replenishing pipe 41 arranged at one end of the air replenisher 4. The fluidizing core 1 is arranged in a frustum shape, and a fluidizing blade 2 is fixedly connected to the circumferential side wall of the fluidizing core 1. The thickness of the fluidizing blade 2 gradually decreases from the end of the fluidizing core 1 with a smaller size to the end of the fluidizing core 1 with a larger size. Through the structural characteristics of the fluidizing core 1 and the fluidizing blade 2, a channel form that is wide in the front and narrow in the back is formed in the output pipe, which changes the flow of the gas ejected from the output pipe on the one hand, and increases the pressure and flow rate of the gas ejected from the output pipe on the other hand, so that the action length of a single air replenisher 4 is longer and the action effect is stronger, thereby reducing the number of air replenishments, reducing gas consumption and reducing energy consumption.

[0034] The fluidizing blade 2 is arranged at an angle, and the angle between the fluidizing blade 2 and the axis of the fluidizing core 1 is any value between 30 degrees and 45 degrees, wherein the angle between the fluidizing blade 2 and the axis of the fluidizing core 1 is preferably 35 degrees. The fluidizing blade 2 is smoothly concave in the inclined direction with the center as the concave point, and the fluidizing blade 2 is arranged in an arc shape as a whole; there are multiple fluidizing blades 2 arranged in the fluidizing blade 2, and the multiple fluidizing blades 2 are evenly distributed along the circumferential side of the fluidizing core 1, and the number of fluidizing blades 2 is any value between six and eleven. Adjacent fluidizing blades 2 are parallel to each other, and the side of each fluidizing blade 2 away from the fluidizing core 1 is fixedly connected to the output pipe by welding, and the axis of the fluidizing core 1 is collinear with the axis of the output pipe. A fluidizing air duct 3 is opened on the circumferential side of the fluidizing core 1, and a fluidizing air duct 3 is arranged between each adjacent fluidizing blade 2. The fluidizing air duct 3 is arranged in an arc shape, and the bending direction of the fluidizing air duct 3 is consistent with the concave direction of the fluidizing blade 2.

[0035] Example 2

[0036] A method for using a structure for enhancing the fluidization effect of pneumatic conveying, wherein the structure for enhancing the fluidization effect of pneumatic conveying described in Example 1 is selected, and the specific method is as follows:

[0037] S1: Fix multiple fluidizing blades 2 one by one in the outlet pipe by welding at the half of the outlet pipe, and keep the axis of the fluidizing core 1 and the axis of the outlet pipe in a collinear state;

[0038] S2: When fixing the fluidizing core 1, set the larger side of the fluidizing core 1 as the windward side;

[0039] S3: Adjust the angle between the output pipe and the ash conveying pipeline so that the angle between the output pipe and the ash conveying pipeline is any angle between 20 degrees and 45 degrees;

[0040] S4: connecting the output pipe to the ash conveying pipeline so that the smaller side of the fluidizing core 1 faces the ash conveying pipeline;

[0041] S5: Fix the output pipe to the ash conveying pipe by welding.

[0042] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Any changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention should fall within the protection scope of the present invention.

Claims

1. A structure for enhancing the fluidization effect of pneumatic conveying, characterized in that: The invention comprises a fluidizing core (1) arranged in an output pipe of an air replenisher (4), and an air replenishing pipe (41) arranged at one end of the air replenisher (4). The fluidizing core (1) is arranged in a frustum shape. A fluidizing blade (2) is fixedly connected to the circumferential side wall of the fluidizing core (1). The thickness of the fluidizing blade (2) gradually decreases from the end of the fluidizing core (1) with a smaller size to the end of the fluidizing core (1) with a larger size. The fluidizing blade (2) is arranged obliquely, and the angle between the fluidizing blade (2) and the axis of the fluidizing core (1) is 30 degrees. The fluidizing blade (2) is smoothly recessed in the inclined direction with the center as the recessed point, and the fluidizing blade (2) is arranged in an arc shape as a whole; a plurality of fluidizing blades (2) are arranged in the fluidizing blade (2), and the plurality of fluidizing blades (2) are evenly distributed along the circumferential side of the fluidizing core (1), and adjacent fluidizing blades (2) are parallel to each other, and the side of each fluidizing blade (2) away from the fluidizing core (1) is fixedly connected to the output pipe by welding, and the axis of the fluidizing core (1) is collinear with the axis of the output pipe.

2. A structure for enhancing the fluidization effect of pneumatic conveying according to claim 1, characterized in that: The number of the fluidizing blades (2) is any value between six and eleven.

3. A structure for enhancing the fluidization effect of pneumatic conveying according to claim 2, characterized in that: A fluidizing air duct (3) is provided on the circumferential side surface of the fluidizing core (1). The fluidizing air duct (3) is arranged in an arc shape, and the bending direction of the fluidizing air duct (3) is consistent with the concave direction of the fluidizing blade (2).

4. A structure for enhancing the fluidization effect of pneumatic conveying according to claim 3, characterized in that: A fluidizing air duct (3) is arranged between each adjacent fluidizing blade (2).

5. A method for using a structure for enhancing the fluidization effect of pneumatic conveying, wherein the structure for enhancing the fluidization effect of pneumatic conveying is selected from any one of claims 1 to 4, characterized in that: S1: A plurality of fluidizing blades (2) are fixed one by one in the outlet pipe by welding at a position halfway along the outlet pipe, and the axis of the fluidizing core (1) is kept in a collinear state with the axis of the outlet pipe; S2: when fixing the fluidizing core (1), setting the larger side of the fluidizing core (1) as the windward side; S3: Adjust the angle between the output pipe and the ash conveying pipeline so that the angle between the output pipe and the ash conveying pipeline is any angle between 20 degrees and 45 degrees; S4: connecting the output pipe to the ash conveying pipeline so that the smaller side of the fluidizing core (1) faces the ash conveying pipeline; S5: Fix the output pipe to the ash conveying pipe by welding.

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