Agitator-type soot treatment device

Abstract

The utility model belongs to the field of additive manufacturing relates to a stirring type smoke dust treatment device, stirring type smoke dust treatment device includes ash bucket and the material stirring device and smoke dust treatment device of being placed in the ash bucket inside, be provided with dust gas inlet pipe, gas exhaust pipe, injection port and ash outlet with the ash bucket inside interpenetration on the ash bucket, dust gas inlet pipe is connected with the gas exhaust pipe through the ash bucket inside and smoke dust treatment device. The utility model provides a stirring type smoke dust treatment device with higher safety.

Description

Technical Field

[0001] This utility model belongs to the field of additive manufacturing and relates to a dust treatment device, and more particularly to a stirring dust treatment device. Background Technology

[0002] In existing dust collection systems in the metal additive manufacturing industry, the common safe handling method for flammable fumes is to collect, transport, and store them under inert gas protection, strictly controlling the ignition source, and then subjecting them to combustion oxidation in air or a combustion chamber. This method requires extremely high reliability in terms of inert atmosphere and ignition source control. If the inert atmosphere fails during collection, transport, and storage, a deflagration accident can easily occur, causing loss of life and property. Furthermore, the dust collection system itself, including its casing and filter elements, can accumulate flammable dust, and during maintenance or long-term storage, the inert atmosphere can easily fail, leading to a deflagration accident. Utility Model Content

[0003] In order to solve the aforementioned technical problems in the background art, this utility model provides a stirring-type dust treatment device with higher safety.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A stirring-type dust treatment device, characterized in that: the stirring-type dust treatment device includes an ash hopper and a material stirring device and a dust treatment device placed inside the ash hopper; the ash hopper is provided with a dust and gas inlet pipe, a gas outlet pipe, a material inlet, and an ash discharge outlet that communicate with the inside of the ash hopper; the dust and gas inlet pipe is connected to the gas outlet pipe through the inside of the ash hopper and the dust treatment device.

[0006] The aforementioned material mixing device includes a mixing motor, a mixing shaft, and a mixing component; the mixing motor is located outside the ash hopper; the mixing shaft extends from outside the ash hopper into the ash hopper; the mixing motor is connected to the mixing component via the mixing shaft and drives the mixing component to rotate axially around the mixing shaft.

[0007] The aforementioned mixing components are mixing blades, dust-generating fans, or screw conveyors.

[0008] When the aforementioned mixing component is a screw conveyor, the screw conveyor includes a first screw conveyor, which is arranged along the axial direction of the ash hopper or along an axial direction perpendicular to the ash hopper.

[0009] When the first screw conveyor is arranged along an axis perpendicular to the ash hopper, the screw conveyor also includes a second screw conveyor; the second screw conveyor is placed outside the ash hopper and arranged along the axial direction of the ash hopper; the material conveying starting point of the second screw conveyor is located at the material conveying end of the first screw conveyor; the material conveying end of the second screw conveyor is connected to the dust and gas inlet pipe.

[0010] Inertizer is injected into the ash hopper through the injection port.

[0011] The aforementioned dust treatment device includes a filter element and a filter element purification mechanism; the filter element divides the ash hopper into a clean air chamber and a reaction chamber; the dust gas inlet pipe is connected to the reaction chamber; the reaction chamber is connected to the ash discharge port; the clean air chamber is connected to the gas discharge pipe; and the filter element purification mechanism is placed in the clean air chamber.

[0012] The aforementioned filter purification mechanism includes a backflushing mechanism, a mechanical vibration mechanism, and / or a mechanical scraping mechanism.

[0013] The aforementioned stirring-type dust treatment device also includes an ash bucket that communicates with the ash discharge port; an ash discharge valve is provided between the ash discharge port and the ash bucket.

[0014] The advantages of this utility model are:

[0015] This invention provides a stirred dust treatment device, including an ash hopper, a material stirring device placed inside the ash hopper, and a dust treatment device. The ash hopper is equipped with a dust gas inlet pipe, a gas outlet pipe, a material inlet, and an ash discharge outlet, all communicating with the interior of the ash hopper. The dust gas inlet pipe is connected to the gas outlet pipe through the interior of the ash hopper and the dust treatment device. In use, the stirred dust treatment device first injects an inert agent into the ash hopper, ensuring that the inert agent covers or completely covers the material stirring device. Then, the material stirring device is activated, dispersing the inert agent in the ash hopper and gradually creating a dust-generating environment. Subsequently, the dust gas to be treated, especially dust gas generated from additive manufacturing, is introduced into the ash hopper through the dust gas inlet pipe. After entering the ash hopper, the dust gas mixes thoroughly with the inert agent in the dust-generating environment, completing the adsorption or encapsulation of dust in the dust gas, ultimately achieving dust removal treatment. This invention utilizes a material stirring method to disperse the inerting agent and inertize flammable powder in real time. This ensures stable and uniform mixing of the flammable powder during manufacturing, reduces its reactivity, and renders it difficult to burn in air, thus improving the safety of the dust collection system. Furthermore, this invention also inertizes the flammable dust accumulated in the dust collection device itself, ensuring safety during maintenance and long-term shutdowns. Simultaneously, this invention reduces manufacturing and usage costs while increasing reliability; the improved safety also reduces processing costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the first embodiment of the stirring-type dust treatment device provided by this utility model;

[0017] Figure 2 This is a schematic diagram of the second embodiment of the stirring-type dust treatment device provided by this utility model;

[0018] Figure 3 This is a schematic diagram of the third embodiment of the stirring-type dust treatment device provided by this utility model;

[0019] in:

[0020] 1-Dust and gas inlet pipe; 2-Filter element; 3-Agitator motor; 4-Gas discharge pipe; 5-Inlet; 6-Agitator blades; 7-Inert agent; 8-Ash discharge valve; 9-Ash bucket; 10-Screw conveyor; 11-Dust fan. Detailed Implementation

[0021] This invention provides a stirred dust treatment device, which includes an ash hopper, a material stirring device placed inside the ash hopper, and a dust treatment device. The ash hopper is equipped with a dust gas inlet pipe 1, a gas outlet pipe 4, a material inlet 5, and an ash discharge port, all communicating with the interior of the ash hopper. The dust gas inlet pipe 1 is connected to the gas outlet pipe 4 through the interior of the ash hopper and the dust treatment device. In use, the stirred dust treatment device first injects an inert agent 7 into the ash hopper through the material inlet 5, ensuring that the inert agent 7 covers or completely covers the material stirring device. Then, the material stirring device is activated, which disperses the inert agent 7 in the ash hopper, gradually creating a dust-generating environment. Subsequently, the dust gas to be treated, especially dust gas generated from additive manufacturing, is introduced into the ash hopper through the dust gas inlet pipe 1. After entering the ash hopper, the dust gas mixes thoroughly with the inert agent 7 in the dust-generating environment, completing the adsorption or encapsulation of dust in the dust gas, ultimately achieving dust removal treatment.

[0022] The material mixing device used in this utility model includes a mixing motor 3, a mixing shaft, and a mixing component; the mixing motor 3 is located outside the ash hopper; the mixing shaft extends from outside the ash hopper into the ash hopper; the mixing motor 3 is connected to the mixing component via the mixing shaft and drives the mixing component to rotate axially around the mixing shaft. For example, the mixing component is a mixing blade 6 (such as...). Figure 1 (as shown), dust fan 11 (as shown) Figure 2 (as shown) or screw conveyor 10 (e.g.) Figure 3(As shown). When the agitator is a screw conveyor 10, the screw conveyor 10 includes a first screw conveyor, which is arranged along the axial direction of the ash hopper or along an axial direction perpendicular to the ash hopper. In this case, the function of the first screw conveyor is basically the same as that of the agitator blades, and will not be described in detail here. However, when the first screw conveyor is arranged along an axial direction perpendicular to the ash hopper, the screw conveyor 10 also includes a second screw conveyor; the second screw conveyor is placed outside the ash hopper and arranged along the axial direction of the ash hopper; the material conveying starting point of the second screw conveyor is located at the material conveying end of the first screw conveyor; the material conveying end of the second screw conveyor is connected to the dust and gas inlet pipe 1. The two screw conveyors operating in opposite directions serve the following functions: 1) The first screw conveyor disperses the inerting agent 7 in the ash hopper, creating a dust-generating environment to prepare for subsequent dust removal; 2) The first screw conveyor gradually transports the inerting agent 7 to the second screw conveyor, which then transports it to the dust gas inlet pipe 1. Since dust gas awaiting removal passes through the dust gas inlet pipe 1, it can be pre-mixed with the inerting agent 7 transported by the second screw conveyor and injected into the ash hopper together, further improving mixing efficiency; 3) As the inerting agent 7 mixes with the dust gas entering the ash hopper, the resulting mixture gradually falls onto the first screw conveyor due to gravity, and is then transported by both the first and second screw conveyors to the dust gas inlet pipe 1, from where it is reintroduced into the ash hopper. This cycle repeats, resulting in higher dust gas treatment efficiency.

[0023] In order to fully treat the dust and gas, inert agent 7 can be added to the ash hopper beforehand, or inert agent 7 can be added during the operation. When it is necessary to add inert agent 7, it can be injected into the ash hopper through the inlet 5.

[0024] After the inerting agent 7 is mixed with the dust gas, in order to better retain the dust, the stirring-type dust treatment device provided by this utility model also includes a dust treatment device placed inside the ash hopper; the dust gas inlet pipe 1 is connected to the gas outlet pipe 4 through the inside of the ash hopper and the dust treatment device. For example, the dust treatment device includes a filter element 2 and a filter element purification mechanism; the filter element 2 divides the ash hopper into a clean air chamber and a reaction chamber; the dust gas inlet pipe 1 is connected to the reaction chamber; the reaction chamber is connected to the ash discharge port; the clean air chamber is connected to the gas outlet pipe 4; the filter element purification mechanism is placed in the clean air chamber. For example, the filter element purification mechanism is a back-flushing mechanism, a mechanical vibration mechanism, and / or a mechanical scraping mechanism.

[0025] In addition, the stirring dust treatment device provided by this utility model also includes an ash bucket 9 that is connected to the ash discharge port; an ash discharge valve 8 is provided between the ash discharge port and the ash bucket 9.

[0026] The technical solution provided by this utility model will now be described in detail with reference to the accompanying drawings:

[0027] Example 1:

[0028] See Figure 1 The stirred dust treatment device provided by this utility model involves circulating gas containing flammable powder dust entering through the dust gas inlet pipe 1, filtering, and then exiting through the gas outlet pipe 4. The power source for the circulating gas can be a fan, air pump, or other similar device. An inert agent 7 is stored in the ash hopper. The inert agent 7 serves to uniformly mix with the dust, preventing the dust from reacting with external gases, and also acts as a pre-coating for the filter element 2, protecting it. Any material meeting the above conditions can be used as an inert agent in this method, with calcium carbonate powder being preferred. The stirring blades 6 are deeply embedded in the conical hopper, ensuring complete coverage by the inert agent 7. The power source is provided by a stirring motor 3 directly connected to the hopper or by a belt drive or similar structure. The core working logic of this embodiment is: simultaneously with the introduction of flammable powder, an additional power source is used to uniformly mix the flammable powder inside the filter element box with the inert agent 7. After the filter element 7 collects sufficient flammable powder, backflushing causes the powder to settle, promoting the mixing of the settled flammable powder with the inert agent 7 through mechanical stirring. This process is repeated until the inert agent is saturated, and then discharged into the ash bucket for recycling.

[0029] For example, the working process of this embodiment is as follows: a measured amount of inerting agent 7 is added to the ash hopper through the inlet 5. After ensuring that the inerting agent 7 completely covers the stirring blades 6, the inlet 5 is closed; gas washing is performed. When the atmosphere meets the process requirements, the stirring blades 6 are turned on to disperse the inerting agent 7 in the ash hopper and gradually form a dust-generating environment, and the dust removal system starts to work; the resistance of the filter element 2 is monitored. When the resistance of the filter element 2 rises to the set parameter, the filter element 2 is automatically cleaned, generally by backflushing (using a strong airflow). The filter element is back-blown to remove the attached material, or vibration or mechanical scraping can be used. The flammable powder that has settled after back-blowing is stirred and mixed evenly with the inerting agent 7 after passing through the stirring blade 6. The above process is repeated until the flammable powder in the inerting agent 7 is saturated. The saturation of the inerting agent 7 can be monitored by time, the cumulative amount of differential pressure of the filter element, or by a sensor that measures the dielectric constant. After the inerting agent 7 is saturated, the ash discharge valve 8 is opened to discharge the saturated inerting agent into the ash bucket 9, and pure inerting agent 7 is added again.

[0030] Example 2:

[0031] See Figure 2 The difference between this embodiment and Embodiment 1 is that the stirring blades 6 in Embodiment 1 are replaced with a dust-generating fan 11. Other operating methods and logic are the same as in Embodiment 1, and will not be repeated here. The dust-generating fan 11 is placed at the bottom of the ash hopper, ensuring it is completely covered by the inerting agent 7. The dust-generating fan 11 can be an impeller connected to an external motor, or an axial flow fan, or other similar devices.

[0032] Example 3:

[0033] See Figure 3 The stirring-type dust treatment device provided in this embodiment has a screw conveyor 10 placed at the bottom of the ash hopper and connected to the dust gas inlet pipe 1 on the side of the filter cartridge box. The inerting agent 7 is transported from the ash hopper to the dust gas inlet pipe 1 via mechanical transmission. The inerting agent 7 is mixed with the flammable powder through the dust gas inlet pipe by airflow. Besides the screw conveyor 10, the mechanical transmission structure can also be a tubular chain conveyor or other structures. The core working logic of this embodiment is: simultaneously with the introduction of flammable powder, the inerting agent 7 is transported to the dust gas inlet pipe 1 using a mechanical transmission structure. A dust-generating environment is created inside the ash hopper through the dust gas inlet, causing the inerting agent 7 to mix with the flammable powder and blown to the filter cartridge 2. The dust and inerting agent 7 on the filter cartridge 2 are cleaned back below the filter cartridge 2. The cleaned-down dust-containing inerting agent is then mixed with the airflow via mechanical transmission and adhered to the filter cartridge 2. This process is repeated until the dust gas treatment is completed.

[0034] For example, the working process of this embodiment is as follows: A fixed amount of inerting agent 7 is added to the ash hopper through the inlet 5. After ensuring that the inerting agent completely covers the screw conveyor 10, the inlet 5 is closed. The screw conveyor 10 is turned on, and the dust removal system starts working after the inerting agent 7 is transferred from the ash hopper to the dust gas inlet pipe 1. The filter element resistance is monitored. When the resistance of the filter element 2 rises to the set parameter, the dust removal system stops working and automatically cleans the filter element 2. Generally, this is done by back-blowing (using a strong airflow to blow the filter element in the opposite direction) to make the attached materials fall off. Vibration or mechanical scraping can also be used. After the inerting agent 7 and flammable powder on the filter element 2 settle, the dust removal system and the screw conveyor structure are restarted and the above-mentioned method is repeated. The cycle continues until the flammable powder in the inerting agent 7 reaches saturation. The saturation of the inerting agent can be monitored by time, the cumulative amount of differential pressure of the filter element, or a sensor that measures the dielectric constant. After the inerting agent is saturated, the ash discharge valve 8 is opened to discharge the saturated inerting agent into the ash bucket 9, and pure inerting agent is added again.

Claims

1. A stirring-type dust treatment device, characterized in that: The stirring dust treatment device includes a dust hopper and a material stirring device and a dust treatment device placed inside the dust hopper; the dust hopper is provided with a dust gas inlet pipe (1), a gas outlet pipe (4), a material inlet (5) and a dust discharge outlet that are in communication with the inside of the dust hopper; the dust gas inlet pipe (1) is connected to the gas outlet pipe (4) through the inside of the dust hopper and the dust treatment device.

2. The stirred dust treatment device according to claim 1, characterized in that: The material mixing device includes a mixing motor (3), a mixing shaft, and a mixing component; the mixing motor (3) is placed outside the ash hopper; the mixing shaft extends from outside the ash hopper into the ash hopper; the mixing motor (3) is connected to the mixing component through the mixing shaft and drives the mixing component to rotate around the axial direction of the mixing shaft.

3. The stirred dust treatment device according to claim 2, characterized in that: The agitator is an agitator blade (6), a dust-suppressing fan (11), or a screw conveyor (10).

4. The stirred dust treatment device according to claim 3, characterized in that: When the agitator is a screw conveyor (10), the screw conveyor (10) includes a first screw conveyor, which is arranged along the axial direction of the ash hopper or along the axial direction perpendicular to the ash hopper.

5. The stirred dust treatment device according to claim 4, characterized in that: When the first screw conveyor is arranged along the axial direction perpendicular to the ash hopper, the screw conveyor (10) also includes a second screw conveyor; the second screw conveyor is placed outside the ash hopper and arranged along the axial direction of the ash hopper; the material conveying starting point of the second screw conveyor is placed at the material conveying end of the first screw conveyor; the material conveying end of the second screw conveyor is connected to the dust gas inlet pipe (1).

6. The stirred dust treatment device according to any one of claims 1-5, characterized in that: The dust treatment device includes a filter element (2) and a filter element purification mechanism; the filter element (2) divides the ash hopper into a clean air chamber and a reaction chamber; the dust gas inlet pipe (1) is connected to the reaction chamber; the reaction chamber is connected to the ash discharge port; the clean air chamber is connected to the gas discharge pipe (4); the filter element purification mechanism is placed in the clean air chamber.

7. The stirred dust treatment device according to claim 6, characterized in that: The filter purification mechanism is a backflushing mechanism, a mechanical vibration mechanism, and / or a mechanical scraping mechanism.

8. The stirred dust treatment device according to claim 7, characterized in that: The stirring dust treatment device also includes an ash bucket (9) that communicates with the ash discharge port; an ash discharge valve (8) is provided between the ash discharge port and the ash bucket (9).

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