Heat accumulating type incinerator for treating silicon particles

Abstract

The utility model relates to the technical field of industrial waste gas treatment, in particular to a heat accumulating type incinerator for treating silicon particles, which comprises an incinerator body, a plurality of combustion chambers communicated with one another are arranged in the incinerator body, igniters are arranged in the combustion chambers, and the igniters are mounted at the top end of the incinerator body. The heat accumulator assembly is formed by overlapping a plurality of ceramic layers, the plurality of ceramic layers are arranged up and down at equal intervals, and a filtering assembly is arranged between every two adjacent ceramic layers; and the self-cleaning mechanism comprises a telescopic annular scraping and sweeping assembly, a rotational flow disturbance assembly and a driving assembly, the telescopic annular scraping and sweeping assembly is arranged around the bottom of the ceramic layer, and one end of the telescopic annular scraping and sweeping assembly is in transmission connection with the driving assembly. Through the synergistic effect of the multi-stage ceramic heat accumulator structure, the telescopic scraping and sweeping assembly and the rotational flow disturbance assembly, the problems of deposition and hardening of silicon particles at the bottom are effectively solved, and the incineration efficiency and the self-cleaning capacity are improved.

Description

Technical Field

[0001] This utility model relates to the field of industrial waste gas treatment technology, and in particular to a regenerative incinerator for treating silicon particles. Background Technology

[0002] Regenerative Thermal Oxidizer (RTO) is a device that purifies and treats VOCs (volatile organic compounds) through thermal incineration. It recovers heat using ceramic regenerators. However, when treating waste gas containing particulate matter such as silicon and sulfur oxides, the high-temperature gases rise during combustion, causing silicon particles to condense and adhere to the pores of the ceramic regenerator due to the temperature difference (up to 100°C or more) between the top and bottom. Long-term accumulation can lead to blockage, reducing heat exchange efficiency and waste gas purification rate. Therefore, regular cleaning of the ceramic regenerator is necessary to ensure optimal heat exchange efficiency.

[0003] However, the traditional cleaning method for regenerative thermal oxidizers currently relies mainly on backflushing of exhaust gas to clean the ceramic regenerator. However, when too much silicon powder and sulfur powder are produced after the filtration and purification of organic waste gas (VOCs), they tend to combine and caking. Backflushing is not enough to completely remove the caking silicon powder, so the machine needs to be stopped for manual cleaning. This not only reduces the cleaning efficiency but also affects the continuous production efficiency. Utility Model Content

[0004] In order to address the technical deficiencies mentioned in the background art, the purpose of this utility model is to provide a regenerative incinerator for processing silicon particles. Through the synergistic effect of a multi-stage ceramic regenerator structure, a retractable scraping component, and a swirling disturbance system, it effectively solves the problem of silicon particle deposition and caking at the bottom, thereby improving incineration efficiency and self-cleaning capability.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A regenerative incinerator for processing silicon particles, comprising

[0007] The furnace body has multiple interconnected combustion chambers, and an igniter is installed in each combustion chamber, with the igniter mounted on the top of the furnace body.

[0008] The heat storage component is composed of multiple ceramic layers stacked on top of each other. The multiple ceramic layers are arranged at equal intervals, and a filter component is provided between two adjacent ceramic layers.

[0009] The self-cleaning mechanism for cleaning the silicon particles adhered to the ceramic layer comprises a telescopic annular scraping assembly, a cyclone disturbance assembly and a driving assembly, the telescopic annular scraping assembly is arranged around the bottom of the ceramic layer, and one end of the telescopic annular scraping assembly is in transmission connection with the driving assembly; the cyclone disturbance assembly is in linkage connection with the telescopic annular scraping assembly.

[0010] Preferably, the telescopic annular scraping mechanism comprises an annular scraper, a telescopic rod and an ultrasonic vibrator, the annular scraper is arranged at the bottom end of the ceramic layer, and the back side of the annular scraper is provided with a brush; one end of the telescopic rod is fixedly connected with the annular scraper, and the other end is in transmission connection with the driving assembly through the ultrasonic vibrator; one end of the ultrasonic vibrator is connected with the telescopic rod through a variable amplitude rod, and the other end is externally connected with a power supply.

[0011] Preferably, the cyclone disturbance assembly comprises a tangential inlet guide plate for forming a cyclone of waste gas and a high-pressure back-blowing nozzle for blowing off the silicon particles, the tangential inlet guide plate is arranged at the gas inlet of the bottom of the furnace body, and the tangential inlet guide plate is in linkage connection with the ultrasonic vibrator; the high-pressure back-blowing nozzle is arranged above the guide plate, and the jet direction of the high-pressure back-blowing nozzle is arranged at a certain angle with the scraping direction of the annular scraper.

[0012] Preferably, the driving assembly comprises a driving cylinder, a guide slide rail and a sliding sleeve, the driving cylinder is fixedly installed on the outer side wall of the furnace body, and the output shaft end of the driving cylinder is in transmission connection with the sliding sleeve; the guide slide rail is transversely arranged on the inner wall of the furnace body, and limit blocks are arranged at both ends of the guide slide rail; the sliding sleeve is in sliding connection with the guide slide rail, and one side of the sliding sleeve is fixedly connected with the ultrasonic vibrator.

[0013] Preferably, the ceramic layer comprises a silicon carbide ceramic layer, a cordierite ceramic layer and a honeycomb ceramic layer arranged in sequence from top to bottom, the silicon carbide ceramic layer, the cordierite ceramic layer and the honeycomb ceramic layer are densely covered with a plurality of honeycomb holes, and the honeycomb hole diameters of the silicon carbide ceramic layer, the cordierite ceramic layer and the honeycomb ceramic layer increase in sequence.

[0014] Preferably, the filter assembly comprises a metal filter screen and an activated carbon filter screen, the metal filter screen is installed between the honeycomb ceramic layer and the cordierite ceramic layer, and the activated carbon filter screen is installed between the cordierite ceramic layer and the silicon carbide ceramic layer.

[0015] Preferably, the bottom end of the furnace body is provided with a waste gas inlet and a waste gas outlet, a switching valve is connected between the waste gas inlet and the waste gas outlet, the switching valve is located at the bottom of the furnace body and is in communication therewith, the waste gas inlet is externally connected with a waste gas inlet pipe, and the waste gas outlet is externally connected with a waste gas outlet pipe.

[0016] Preferably, a back-blowing cleaning pipe is installed between the waste gas inlet and the furnace body, and the back-blowing cleaning pipe is connected with the high-pressure back-blowing nozzle.

[0017] In summary, the beneficial effects of the present application are:

[0018] The multi-stage ceramic heat storage body structure, the telescopic scraping assembly and the rotational flow disturbance system are cooperated, the problems of the bottom particulate matter deposition and blockage caused by the temperature difference of the RTO ceramic heat storage body are effectively solved, and the incineration efficiency and self-cleaning capacity of the heat storage incinerator are improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a structural schematic view of the heat storage incinerator for treating silicon particulate matter of the present application;

[0020] Figure 2 is a perspective sectional view of the heat storage incinerator for treating silicon particulate matter of the present application;

[0021] Figure 3 is a front view of the heat storage incinerator for treating silicon particulate matter of the present application;

[0022] Figure 4 is Figure 3 is an enlarged view of the telescopic annular scraping assembly and the driving assembly at a in the figure;

[0023] Figure 5 is Figure 2 is a sectional view of A-A plane in the figure;

[0024] Figure 6 is Figure 5 is a sectional view of B-B plane in the figure.

[0025] Explanation of reference signs in the figure:

[0026] 1, furnace body; 11, combustion chamber; 12, igniter; 2, ceramic layer; 21, silicon carbide ceramic layer; 22, cordierite ceramic layer; 23, honeycomb ceramic layer; 24, honeycomb hole; 3, filtering assembly; 31, metal filter screen; 32, activated carbon filter screen; 4, self-cleaning mechanism; 41, telescopic annular scraping assembly; 411, annular scraper; 412, telescopic rod; 413, ultrasonic vibrator; 42, rotational flow disturbance assembly; 421, tangential inlet guide plate; 422, high-pressure back-blowing nozzle; 43, driving assembly; 431, driving cylinder; 432, guide slide rail; 433, sliding sleeve; 5, waste gas inlet; 6, waste gas outlet; 7, switching valve; 8, back-blowing cleaning pipe. DETAILED DESCRIPTION

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0028] Those skilled in the art should understand that, in the disclosure of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not 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, the above terms should not be construed as limitations on this utility model.

[0029] In the description of this utility model, the use of terms such as "several" means one or more, with "multiple" meaning two or more. Terms like "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of terms like "first," "second," and "third" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, the quantity of indicated technical features, or the sequential relationship between indicated technical features.

[0030] The following is in conjunction with the appendix Figures 1-6 The present invention provides a more detailed description of an embodiment of a regenerative incinerator for processing silicon particles.

[0031] A regenerative incinerator for processing silicon particles, such as Figures 1 to 3 As shown, including

[0032] Furnace body 1, which has multiple interconnected combustion chambers 11, and an igniter 12 is installed in the combustion chamber 11, with the igniter 12 installed at the top of the furnace body 1.

[0033] The heat storage component is composed of multiple ceramic layers 2 stacked on top of each other. The multiple ceramic layers 2 are arranged at equal intervals, and a filter component 3 is provided between two adjacent ceramic layers 2.

[0034] The self-cleaning mechanism 4 is used for cleaning the silicon particles adhered to the ceramic layer 2, and comprises a telescopic annular scraping assembly 41, a cyclone disturbance assembly 42 and a driving assembly 43. The telescopic annular scraping assembly 41 is arranged around the bottom of the ceramic layer 2, and one end of the telescopic annular scraping assembly 41 is in transmission connection with the driving assembly 43. The cyclone disturbance assembly 42 is in linkage connection with the telescopic annular scraping assembly 41, so as to realize the simultaneous scraping and removal of the silicon particles adhered to the ceramic layer 2.

[0035] Specifically, the ceramic layer 2 comprises a silicon carbide ceramic layer 212, a cordierite ceramic layer 222 and a honeycomb ceramic layer 232 arranged in sequence from top to bottom. The silicon carbide ceramic layer 212, the cordierite ceramic layer 222 and the honeycomb ceramic layer 232 are all densely provided with a plurality of honeycomb holes 24, and the diameters of the honeycomb holes 24 on the silicon carbide ceramic layer 212, the cordierite ceramic layer 222 and the honeycomb ceramic layer 232 increase in sequence. The diameter of the honeycomb hole 24 on the silicon carbide ceramic layer 212 is φ2-3mm, the diameter of the honeycomb hole 24 on the cordierite ceramic layer 222 is φ3-5mm, and the diameter of the honeycomb hole 24 on the honeycomb ceramic layer 232 is φ5-8mm. The honeycomb holes 24 with different diameters can process and intercept different particles. The honeycomb ceramic layer 232 can intercept particles larger than 50μm, the cordierite layer can filter particles between 10-50μm, and the silicon carbide ceramic layer 212 can process particles smaller than 10μm. The use of the multi-layer ceramic heat storage body combined with the gradient pore size structure can reduce the condensation of particles in the low-temperature area at the bottom. At the same time, the filter assembly 3 located between the ceramic layers 2 can effectively intercept small particles and reduce the risk of caking.

[0036] In the embodiment, as shown in Figure 4 The telescopic annular scraping mechanism comprises an annular scraper 411, a telescopic rod 412 and an ultrasonic vibrator 413. The annular scraper 411 is arranged at the bottom end of the ceramic layer 2, and the back side of the annular scraper 411 is provided with a brush. One end of the telescopic rod 412 is fixedly connected with the annular scraper 411, and the other end is in transmission connection with the driving assembly 43 through the ultrasonic vibrator 413. One end of the ultrasonic vibrator 413 is connected with the telescopic rod 412 through a variable amplitude rod, and the other end is externally connected with a power supply.

[0037] Specifically, the annular scraper 411 is made of high-temperature-resistant silicone rubber material, and the scraper width is 80mm. The back side is inlaid with a carbonized silicon fiber brush. The brush can be extended into the honeycomb hole 24 for cleaning to prevent caked silicon particles from being blocked, thereby further improving the cleaning effect of the heat storage body assembly. The ultrasonic vibrator 413 is connected with the telescopic rod 412 through the variable amplitude rod, which drives the scraper to move up and down and simultaneously vibrates at high frequency to strip the caked particles. The annular scraper 411 cooperates with the ultrasonic vibration to directly strip the caked particles. The high-pressure back blowing and the cyclone air intake form a dynamic airflow field to prevent secondary adhesion, and the dust removal efficiency is improved by more than 60%.

[0038] In the embodiment, as shown in Figure 5 , 6 The cyclone disturbance assembly 42 includes a tangential inlet guide vane 421 for forming a cyclone flow of the exhaust gas and a high-pressure back-blowing nozzle 422 for blowing off the agglomerated silicon particles. The tangential inlet guide vane 421 is arranged at the bottom inlet of the furnace body 1 and is connected to the ultrasonic vibrator 413. The high-pressure back-blowing nozzle 422 is arranged above the guide vane and is arranged at an angle with the scraping direction of the annular scraper 411.

[0039] Specifically, the guide vane forms a cyclone flow when the exhaust gas enters, reducing the particle deposition. The high-pressure nozzle sprays the gas flow at an inclined angle, which enhances the dust removal effect in cooperation with the scraping direction. The high-pressure back-blowing nozzle 422 is preferably 6 groups of symmetrical distribution, the nozzle diameter is 10 mm, the jet pressure is 0.8 MPa, and the jet angle is 30° with the scraping direction. The frequency of the ultrasonic vibrator 413 is 28 kHz, and the scraping stroke covers the entire area at the bottom of the ceramic layer 2. The dust removal cycle is controlled by the external PLC to realize unattended operation.

[0040] In the embodiment, the driving assembly 43 includes a driving cylinder 431, a guide rail 432, and a sliding sleeve 433. The driving cylinder 431 is fixedly installed on the outer wall of the furnace body 1, and the output shaft end of the driving cylinder 431 is in transmission connection with the sliding sleeve 433. The guide rail 432 is arranged transversely on the inner wall of the furnace body 1, and limit blocks are arranged at both ends of the guide rail 432. The sliding sleeve 433 is in sliding connection with the guide rail 432, and one side of the sliding sleeve 433 is fixedly connected with the ultrasonic vibrator 413.

[0041] Specifically, the cylinder drives the sliding sleeve 433 to move along the guide rail, driving the ultrasonic vibrator 413 and the scraper to periodically rise and fall, thereby realizing full-automatic dust removal.

[0042] In the embodiment, as shown in Figure 5 , the filter assembly 3 includes a metal filter screen 31 and an activated carbon filter screen 32. The metal filter screen 31 is installed between the honeycomb ceramic layer 232 and the cordierite ceramic layer 222, and the activated carbon filter screen 32 is installed between the cordierite ceramic layer 222 and the silicon carbide ceramic layer 212.

[0043] Specifically, the metal filter screen 31 can further filter the particles with a diameter greater than 50 μm in the exhaust gas treated by the honeycomb ceramic layer 232. The filtered exhaust gas is further heat-exchanged and filtered by the cordierite ceramic layer 222, thereby completing further purification. Then, the exhaust gas passes through the activated carbon screen between the honeycomb ceramic layer 232 and the cordierite ceramic layer 222 to adsorb sulfides, thereby filtering the sulfides and silicon particles separately.

[0044] In the embodiment, the bottom end of the furnace body 1 is provided with a waste gas inlet 5 and a waste gas outlet 6, the waste gas inlet 5 and the waste gas outlet 6 are connected with a switching valve 7, the switching valve 7 is located at the bottom of the furnace body 1 and communicates with the furnace body 1, the waste gas inlet 5 is connected with a waste gas inlet pipe, and the waste gas outlet 6 is connected with a waste gas outlet pipe.

[0045] Specifically, a back flushing cleaning pipe 8 is also installed between the waste gas inlet 5 and the furnace body 1, and the back flushing cleaning pipe 8 communicates with the high-pressure back flushing nozzle 422.

[0046] The working principle of the utility model:

[0047] In the treatment stage of the industrial waste gas, the waste gas is transported to the furnace body 1 from the waste gas inlet pipe, the waste gas inlet 5 is opened by the switching valve 7 at the bottom of the furnace body 1, so that the waste gas enters the furnace body 1 under the action of the tangential inlet guide plate 421 and forms a cyclone, and then the cyclone waste gas passes through the silicon carbide layer, the activated carbon filter screen 32, the cordierite layer, the metal filter screen 31 and the honeycomb ceramic layer 232 in turn, so that the particulate matters contained in the waste gas are intercepted step by step, the gas after preliminary purification is incinerated and purified by the combustion chamber 11, then the waste gas outlet 6 is switched and opened by the switching valve 7, and is discharged through the waste gas outlet pipe; when the furnace body 1 detects that the pressure difference increases, the switching valve 7 closes the waste gas inlet, and the self-cleaning mode is started: first, the ring-shaped scraper 411 is pushed along the bottom of the ceramic layer 2 to reciprocate and scrape by the driving cylinder 431, and the cleaning position of the ring-shaped scraper 411 is adjusted freely according to the size of the ceramic layer 2 by the telescopic rod 412, at the same time, the ultrasonic vibrator 413 generates high-frequency vibration, the high-frequency vibration is transmitted to the ring-shaped scraper 411, so that the brush located on the ring-shaped scraper 411 can loosen the caked particulate matters through ultrasonic vibration; then, the high-pressure back flushing nozzle 422 synchronously sprays the airflow, and the fallen particulate matters are blown into the bottom back flushing cleaning pipe 8 for collection and discharge; after cleaning, the switching valve 7 is reset, and the system resumes operation.

[0048] The embodiments of the specific embodiment are the preferred embodiments of the application, and are not limited to the protection scope of the application, wherein the same parts are indicated by the same reference numerals. Therefore: any equivalent changes made according to the structure, shape and principle of the application should be covered in the protection scope of the application.

Claims

1. A regenerative incinerator for treating silicon particulate matter, characterized by, The application relates to a heat accumulating incinerator for processing silicon particles. The incinerator body is internally provided with a plurality of interconnected combustion chambers, and an igniter is arranged in the combustion chamber and mounted on the top end of the incinerator body. The heat accumulating body assembly is composed of a plurality of ceramic layers arranged in a mutual superposition mode, and the ceramic layers are arranged in an equidistant mode from top to bottom, and a filter assembly is arranged between two adjacent ceramic layers. The self-cleaning mechanism is used for cleaning silicon particles adhered to the ceramic layers, and the self-cleaning mechanism comprises a telescopic annular scraping assembly, a cyclone disturbance assembly and a driving assembly.

2. The regenerative incinerator for treating silicon particulates according to claim 1, wherein The telescopic annular scraping assembly is arranged around the bottom of the ceramic layer, and one end of the telescopic annular scraping assembly is in transmission connection with the driving assembly.

3. The regenerative incinerator for treating silicon particulates according to claim 2, wherein The cyclone disturbance assembly is in linkage connection with the telescopic annular scraping assembly.

4. The regenerative incinerator for treating silicon particulates according to claim 3, characterized by The telescopic annular scraping assembly comprises an annular scraper, a telescopic rod and an ultrasonic vibrator, the annular scraper is arranged at the bottom end of the ceramic layer, and a brush is arranged on the back side of the annular scraper.

5. The regenerative incinerator for treating silicon particulates according to claim 4, wherein One end of the telescopic rod is fixedly connected with the annular scraper, and the other end is in transmission connection with the driving assembly through the ultrasonic vibrator.

6. The regenerative incinerator for treating silicon particulate matter according to claim 5, wherein One end of the ultrasonic vibrator is connected with the telescopic rod through a variable amplitude rod, and the other end is externally connected with a power supply.

7. The regenerative incinerator for treating silicon particulates according to claim 6, wherein The cyclone disturbance assembly comprises a tangential inlet guide plate for forming a cyclone of waste gas and a high-pressure back-blowing nozzle for blowing off the silicon particles, the tangential inlet guide plate is arranged at the bottom gas inlet of the incinerator body, and the tangential inlet guide plate is in linkage connection with the ultrasonic vibrator. The high-pressure back-blowing nozzle is arranged above the guide plate, and the jet direction of the high-pressure back-blowing nozzle is arranged at a certain angle with the scraping direction of the annular scraper. The driving assembly comprises a driving cylinder, a guide sliding rail and a sliding sleeve. The driving cylinder is fixedly mounted on the outer side wall of the incinerator body, and the output shaft end of the driving cylinder is in transmission connection with the sliding sleeve. The guide sliding rail is horizontally arranged on the inner wall of the incinerator body, and limiting blocks are arranged at both ends of the guide sliding rail. The sliding sleeve is slidably connected on the guide sliding rail, and one side of the sliding sleeve is fixedly connected with the ultrasonic vibrator. The ceramic layer comprises a silicon carbide ceramic layer, a cordierite ceramic layer and a honeycomb ceramic layer arranged in sequence from top to bottom. The silicon carbide ceramic layer, the cordierite ceramic layer and the honeycomb ceramic layer are densely covered with a plurality of honeycomb holes, and the honeycomb hole diameters of the silicon carbide ceramic layer, the cordierite ceramic layer and the honeycomb ceramic layer increase in sequence. The filter assembly comprises a metal filter screen and an activated carbon filter screen. The metal filter screen is mounted between the honeycomb ceramic layer and the cordierite ceramic layer, and the activated carbon filter screen is mounted between the cordierite ceramic layer and the silicon carbide ceramic layer. The bottom end of the incinerator body is provided with a waste gas inlet port and a waste gas outlet port.

8. The heat accumulating incinerator for processing silicon particles according to claim 7 is further provided with a back-blowing cleaning pipe between the waste gas inlet port and the incinerator body, and the back-blowing cleaning pipe is in communication with the high-pressure back-blowing nozzle.

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