CN112246061A - Front-mounted high-temperature flue gas sampling, dedusting and filtering device - Google Patents
Front-mounted high-temperature flue gas sampling, dedusting and filtering device Download PDFInfo
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- CN112246061A CN112246061A CN202011156104.3A CN202011156104A CN112246061A CN 112246061 A CN112246061 A CN 112246061A CN 202011156104 A CN202011156104 A CN 202011156104A CN 112246061 A CN112246061 A CN 112246061A
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- G01N1/2205—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling with filters
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Abstract
The invention discloses a front-mounted high-temperature flue gas sampling, dedusting and filtering device, wherein an air inlet inner cavity is arranged in a first cavity, a filter element is arranged in the air inlet inner cavity, a middle flue gas pipeline is arranged on one side of the air inlet inner cavity and is communicated with the interior of the first cavity through openings at two ends, the middle flue gas pipeline is communicated with an air inlet flue gas channel, the air inlet inner cavity is not directly communicated with the air inlet flue gas channel and the middle flue gas pipeline, and an air outlet flue gas channel communicated with the air inlet inner cavity is arranged in a second cavity. According to the preposed high-temperature flue gas sampling, dedusting and filtering device provided by the invention, when flue gas enters the second cavity from the first cavity through suction force, the space is enlarged, the flow speed is reduced, dust particles are easy to settle and are directly stored on the inner wall of the second cavity, the first dedusting and collecting process is completed, the flue gas then enters the inner cavity of the gas inlet body, the dust particles are automatically separated after passing through the filter element, the second dedusting and collecting process is completed, and the flue gas is discharged through the gas outlet flue gas channel.
Description
Technical Field
The invention belongs to the technical field of flue gas dust removal and filtration devices, and particularly relates to a front-mounted high-temperature flue gas sampling and dust removal and filtration device.
Background
Coal fired power plant can produce a large amount of flue gases in process of production, wherein contain nitrogen oxide, oxysulfide, carbon monoxide, dust etc. and its direct emission can cause adverse effect to the environment, consequently need carry out minimum emission and reform transform, realizes the clean electricity generation of unit. In order to detect the combustion condition of a unit, the content of flue gas components generated in combustion and the performance evaluation condition after ultralow emission modification, the flue gas in a boiler flue needs to be sampled and analyzed. The conventional method is that a sampling device is utilized to sample at a flue gas sampling point and then is led to a flue gas analyzer through a connecting pipeline for analysis, a large amount of dust is deposited in the sampling pipeline along with the sampling pipeline and is difficult to clean, so that the flow of each sampling point is different, the sampling continuity cannot be guaranteed, and the detection efficiency is low. Meanwhile, when the flue leaves the temperature (such as after being cooled by a sampling tube), the dust has an adsorption effect on part of pollutants, so that the test precision is reduced, and even the measurement result is influenced. Therefore, research and development relates to a flue gas sampling dust removal filter equipment that can get rid of the dust at the high temperature part has important realistic meaning, and the deposit of the moisture in the flue gas of not only taking a sample in the pipeline with get rid of the degree of difficulty greatly reduced can improve detection efficiency and precision moreover greatly.
Chinese patent, granted publication No. CN209155389U, discloses a flue gas filtering device, which is hollow inside and is provided with a filter membrane and anhydrous silica gel therein. The flue gas filters the ash content through filtration membrane after getting into filter equipment, regularly to filter equipment clearance and change. However, the filter membrane of the device can only be applied to low-temperature smoke, and dust can still block in the sampling steel pipe to influence measurement.
Chinese patent, granted publication No. CN207036518U discloses an anti-blocking type flue gas sampling device, which is divided into an upper part and a lower part, wherein the upper part is provided with a partition board to divide the sampling device into two spaces, which are respectively used as a flue gas inlet and outlet, the lower part is provided with a silica gel desiccant, the flue gas enters a filter device and then is firstly dedusted by a filter screen, and then is dedusted by the filter screen, and clean gas is discharged from the outlet. The filter unit is cleaned and replaced periodically. However, the device is not provided with a dust and flue gas separation space, flue gas still needs to enter the next stage of filtration after passing through a large amount of dust, the air exhaust resistance is increased, and meanwhile, the flue gas still carries dust, and the operation is troublesome.
In the technical scheme which is disclosed at present and aims at solving the problems of flue gas sampling, dust removal and filtration, the dust removal device is only suitable for low-temperature section dust removal and cannot solve the problem of high-temperature sampling and dust removal, and the dust removal effect is poor after long-time use, dust is troublesome to clean, and further improvement is needed.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention aims to provide a front-mounted high-temperature flue gas sampling, dedusting and filtering device.
In order to achieve the purpose and achieve the technical effect, the invention adopts the technical scheme that:
a front-mounted high-temperature flue gas sampling, dedusting and filtering device comprises a hollow cavity, wherein the cavity comprises a first cavity and a second cavity which are hollow inside and communicated with each other along the flue gas inlet direction, a hollow gas inlet inner cavity is arranged in the first cavity, a filter element is arranged in the gas inlet inner cavity, a middle flue gas pipeline with openings at two ends is arranged on one side of the gas inlet inner cavity, which faces away from the second cavity, the middle flue gas pipeline is communicated with the inside of the first cavity through openings at two ends, one side of the middle flue gas pipeline, which faces away from the gas inlet inner cavity, is communicated with a gas inlet flue gas channel, the gas inlet inner cavity is not directly communicated with the gas inlet flue gas channel and the middle flue gas pipeline, a gas outlet flue gas channel communicated with the gas inlet inner cavity is arranged in the second cavity;
in the flue gas got into gas flue gas passageway, in the flue gas pipeline in the middle of the reentrant, give off to the first cavity in by the both ends opening part of middle flue gas pipeline, reentrant second cavity is internal, and the granule in the flue gas is deposited in the internal wall of second cavity, and the flue gas gets into the internal intracavity of admitting air afterwards, filters through the filter core, and the flue gas is discharged to the sampling tube in through gas flue gas passageway, is convenient for carry on steps such as follow-up sample, analysis.
Further, flue gas pipeline in the middle of the connecting block that cylindrical structure was passed through on gas inlet cavity right side connects, flue gas pipeline in the middle of the upper and lower both ends and the right side middle part opening of middle flue gas pipeline, the upper and lower both ends opening and the inside intercommunication of first cavity of middle flue gas pipeline, flue gas pipeline's right side middle part opening and the body flue gas passageway intercommunication that admits air in the middle of.
Further, the left side opening of the air inlet cavity and the inner wall symmetry of the air inlet cavity are provided with a plurality of limiting blocks, and the filter element is detachably installed in the inner cavity of the air inlet body through the left side opening of the air inlet cavity and is limited through the limiting blocks.
Furthermore, the coaxial gas inlet body is detachably arranged on the right side of the first cavity, the gas inlet smoke channel penetrates through the central position in the gas inlet body, and the rightmost side of the gas inlet smoke channel is a smoke inlet.
Furthermore, the coaxial gas outlet body is detachably arranged on the left side of the second cavity, the right side of the gas outlet flue gas channel penetrates through the gas and extends into the inner cavity of the gas inlet body, and the leftmost side of the gas outlet flue gas channel is a flue gas outlet.
Further, still include the pump, the pump sets up in leading high temperature flue gas sampling dust removal filter equipment outside, and under the effect of pump, the flue gas passes through the body flue gas passageway of admitting air and gets into first cavity and second cavity in proper order, filters through the filter core again, discharges to the sampling pipe in through the gas flue gas passageway of going out.
Furthermore, the gas is introduced into the right side of the first cavity through the detachable arrangement of the first threads, and the gas is discharged from the left side of the second cavity through the detachable arrangement of the second threads.
Furthermore, the gas inlet on the right side of the gas inlet inner cavity, the first cavity, the second cavity and the gas outlet on the left side of the second cavity are all in coaxial cylinder structures, and the diameter of the cylinder of the second cavity is larger than that of the cylinder of the first cavity.
Further, the diameter of the cylinder of the second cavity is not less than 1.2 times of the diameter of the cylinder of the first cavity.
Furthermore, the filter element is made of high-temperature-resistant filter materials.
Further, the high-temperature-resistant filter material comprises any one of aluminum, stainless steel and asbestos.
Compared with the prior art, the invention has the beneficial effects that:
the invention discloses a preposed high-temperature flue gas sampling, dedusting and filtering device which comprises a hollow cavity, wherein the cavity comprises a first cavity and a second cavity which are hollow inside and communicated with each other along the flue gas inlet direction, a hollow air inlet inner cavity is arranged in the first cavity, a filter element is arranged in the air inlet inner cavity, a middle flue gas pipeline with two open ends is arranged on one side of the air inlet inner cavity, which is back to the second cavity, the middle flue gas pipeline is communicated with the inside of the first cavity through the openings at the two ends, one side of the middle flue gas pipeline, which is back to the air inlet inner cavity, is communicated with an air inlet flue gas channel, the air inlet inner cavity is not directly communicated with the air inlet flue gas channel and the middle flue gas pipeline, and an air outlet flue gas channel communicated with the. The invention provides a preposed high-temperature flue gas sampling, dedusting and filtering device, wherein flue gas firstly enters a gas inlet flue gas channel, is emitted into a first cavity from openings at two ends of a middle flue gas pipeline and then enters a second cavity, when the flue gas enters the second cavity from the first cavity through suction force, the space is enlarged, the flow speed is reduced, partial dust particles in the flue gas are easy to settle and are directly stored on the inner wall of the second cavity with larger volume, the first-step dedusting and collecting process is completed, then the flue gas enters an air inlet cavity and is filtered through a filter element, the flue gas and the dust particles therein are automatically separated through the filter element, the second-step dedusting and collecting process is completed, the flue gas is discharged through an air outlet flue gas channel, the first cavity and the second cavity can be arranged into a whole body through threaded connection or fixation according to actual requirements, when the dust particles in the second cavity are more, the air outlet is opened, overall structure is simple, and dust removal filter effect is good under the high temperature, and simple to operate need not change the consumptive material in the use, and it is convenient to filter the thing and wash, is used for leading dust removal of high temperature flue gas sample to filter and can obtains good actual effect, helps improving detection efficiency and precision, and application prospect is wide.
Drawings
FIG. 1 is a side view of the present invention;
wherein: 1. gas is fed; 2. gas is discharged; 3. a cavity; 4. a filter element; 5. a limiting block; 10. a flue gas inlet; 11. a first thread; 12. an inlet gas flue gas channel; 13. an air inlet inner cavity; 14. a middle flue gas duct; 15. connecting blocks; 20. a flue gas outlet; 21. a second threaded connection; 22. a gas outlet flue gas channel; 31. a second cavity; 32. a first cavity.
Detailed Description
The following detailed description of the embodiments of the present invention is provided to enable those skilled in the art to more easily understand the advantages and features of the present invention, and to clearly and clearly define the scope of the present invention.
As shown in figure 1, a front-mounted high-temperature flue gas sampling, dedusting and filtering device is arranged at the front end of a sampling pipe, smoke is firstly filtered by the dedusting and filtering device and then is subjected to subsequent sampling analysis by the sampling pipe, the dedusting and filtering device comprises a hollow cavity 3, the cavity 3 comprises a first cavity 32 and a second cavity 31 which are hollow inside and communicated with each other along the flue gas entering direction (from right to left), the first cavity 32 and the second cavity 31 can be arranged into a threaded connection or fixed into a whole according to actual requirements, a hollow air inlet inner cavity 13 is arranged in the first cavity 32, a filter element 4 is arranged in the air inlet inner cavity 13, a middle flue gas pipeline 14 with two open ends is arranged on one side (right side) of the air inlet inner cavity 13 back to the second cavity 31, the middle flue gas pipeline 14 is communicated with the inside of the first cavity 32 through two open ends, one side of the middle flue gas pipeline 14 back to the air inlet inner cavity 13 is communicated with an air flue gas channel 12, the gas inlet inner cavity 13 is not directly communicated with the gas inlet flue gas channel 12 and the middle flue gas pipeline 14, a gas outlet flue gas channel 22 communicated with the gas inlet inner cavity 13 is arranged in the second cavity 31, and the gas outlet flue gas channel 22 is communicated with the sampling pipe; the outside pump that sets up of dust removal filter equipment, under the suction effect of pump, in flue gas gets into gas flue gas passageway 12, reentrant middle flue gas pipeline 14 in, distribute to first cavity 32 in by middle flue gas pipeline 14's both ends opening part, reentrant second cavity 31, granule deposit in the second cavity 31 inner wall in the flue gas, the flue gas gets into and filters in the gas inlet cavity inner chamber 13 and through filter core 4, discharges to rather than the sampling pipe who communicates through gas flue gas passageway 22.
The middle flue gas pipeline 14 is connected through the connecting block 15 of cylindrical structure on the right side of the gas inlet inner cavity 13 for the gas inlet inner cavity 13 is not communicated with the middle flue gas pipeline 14, the upper and lower two ends and the right side middle opening of the middle flue gas pipeline 14, the upper and lower two end openings of the middle flue gas pipeline 14 are communicated with the inside of the first cavity 32, and the right side middle opening of the middle flue gas pipeline 14 is communicated with the gas inlet flue gas channel 12.
13 left side openings in the air inlet inner chamber, be convenient for filter core 4 to put into, filter core 4 can be according to actual conditions is whole to be put into in the air inlet inner chamber 13, also can partly put into in the air inlet inner chamber 13, filter core 4 partly is put into in the air inlet inner chamber 13 and the rest is unsettled in second cavity 31 promptly, air inlet inner chamber 13 inner wall symmetry sets up a plurality of stopper 5, filter core 4 is detachable to be installed in air inlet inner chamber 13 through the left side opening of air inlet inner chamber 13, carry on spacingly through stopper 5, avoid filter core 4 to stretch into air inlet inner chamber 13 too deeply and be difficult to take out, stopper 5 adopt current structure can, like the convex structure of various shapes.
The right side of the first cavity 32 is detachably provided with a coaxial gas inlet 1 through a first thread 11, a gas inlet flue gas channel 12 penetrates through the central position inside the gas inlet 1, and the rightmost side of the gas inlet flue gas channel 12 is a flue gas inlet 10 serving as a flue gas inlet.
The left side of the second cavity 31 is detachably provided with a coaxial gas outlet 2 through a second thread 21, the right side of a gas outlet flue gas channel 22 penetrates through the gas 2 and extends into the gas inlet inner cavity 13, the leftmost side of the gas outlet flue gas channel 22 is a flue gas outlet 20 serving as a flue gas discharge port, a pump (not shown, only the existing product is adopted, and the internal negative pressure of the device is mainly kept) is arranged at the flue gas outlet 20, and under the action of the pump, flue gas sequentially enters the first cavity 32 and the second cavity 31 through the gas inlet flue gas channel 12, is filtered through the filter element 4, and is discharged through the gas outlet flue gas channel 22.
The internal chamber 13 of body admits air, first cavity 32, admit air 1, second cavity 31 and play gas 2 all are coaxial cylinder structure, connect as an organic wholely through screw thread or contact, can select corresponding material according to the flue temperature, in order to adapt to dust removal effect under the different temperatures, the diameter of second cavity 31 can freely design according to the sampling flow rate, but at least more than 1.2 times of first cavity 32 diameter, the suction effect that the flue gas passes through the pump is when getting into second cavity 31 by first cavity 32, the space grow, the velocity of flow reduces, the dust easily subsides, the direct storage is in the bigger second cavity 31 of volume.
The filter element 4 is made of aluminum, stainless steel, asbestos or other high-temperature-resistant filter materials, the length of the filter element is flexibly adjusted according to the length of the air inlet inner cavity 13, the filter element can be detached and cleaned, and the filter element is mainly used for filtering dust particles.
The working principle of the invention is as follows:
before work, the filter element 4 is placed in the air inlet inner cavity 13, all parts are connected through the adaptive threads, and then the air tightness of the whole device is checked, so that the air tightness can meet the requirement;
the device is connected to the front end of the sampling tube through hard connections such as threads, smoke is introduced from the smoke inlet 10 under the action of pumping force of the pump, the smoke enters the first cavity 32 of the cavity 3 through the gas smoke channel 12 and the openings at the upper end and the lower end of the middle smoke pipeline 14 and then flows to the second cavity 31, the volume of the smoke rapidly expands after entering the second cavity 31, the flow rate is reduced, after the smoke contacts the inner wall of the second cavity 31, part of particles in the smoke are deposited on the inner wall of the second cavity 31, and the smoke completes the first dust removal and collection process;
the flue gas then flows into the inner cavity 13 of the air inlet body along the left opening of the inner cavity 13 of the air inlet body, the filter element 4 is arranged in the inner cavity 13 of the air inlet body, dust particles are automatically separated after passing through the filter element 4, and the flue gas finishes the second step of dust removal and collection;
the filtered flue gas leaves the dust removal filter along the flue gas channel 22 of the flue gas, and when the dust in the second cavity 31 is more, the flue gas 2 is opened to be removed.
Example 1
As shown in figure 1, a front-mounted high-temperature flue gas sampling, dedusting and filtering device for flue gas sampling for SCR denitration device performance test of a 1000MW coal-fired power generating set comprises a hollow cavity 3, in order to improve dedusting effect, along the flue gas entering direction (from right to left), the cavity 3 comprises a first cavity 32 and a second cavity 31 which are hollow and communicated with each other, the first cavity 32 and the second cavity 31 can be arranged into a threaded connection or fixed into a whole according to actual requirements, a hollow air inlet inner cavity 13 is arranged in the first cavity 32, a filter element 4 is arranged in the air inlet inner cavity 13, an intermediate flue gas pipeline 14 with two open ends is arranged on the right side of the air inlet inner cavity 13, which is back to the second cavity 31, the intermediate flue gas pipeline 14 is communicated with the inside of the first cavity 32 through openings at the upper end and the lower end, the intermediate flue gas pipeline 14 is back to the right opening of the air inlet inner cavity 13 and is communicated with an air, the inlet body inner chamber 13 is not directly communicated with the inlet body flue gas channel 12 and the middle flue gas pipeline 14, an outlet body flue gas channel 22 communicated with the inlet body inner chamber 13 is arranged in the second cavity 31, the outlet body flue gas channel 22 is communicated with the sampling pipe, under the action of drawing force, flue gas enters the inlet body flue gas channel 12 and then enters the middle flue gas pipeline 14, the flue gas is outwards emitted into the first cavity 32 through openings at the upper end and the lower end of the middle flue gas pipeline 14 and then enters the second cavity 31, particles in the flue gas are deposited on the inner wall of the second cavity 31, the flue gas enters the inlet body inner chamber 13 and is filtered through the filter element 4, the flue gas is discharged into the sampling pipe through the outlet body flue gas channel 22, and subsequent sampling analysis is facilitated.
The filtering device is made of stainless steel, the diameter of the cylinder of the first cavity 32 is 30mm, the length of the cylinder is 80mm, and the diameter of the cylinder of the second cavity 31 is 40mm, and the length of the cylinder is 80 mm; the diameter of the cylinder of the inner cavity 13 of the gas inlet is 20mm, the height of the filter element 4 is 30mm, and the diameters of the cylinders of the gas inlet flue gas channel 12 and the gas outlet flue gas channel 22 are the same and are 14 mm; the middle flue gas pipeline 14 is of a hollow cylindrical structure with openings at two ends, and the inner cavity 13 of the gas inlet body is vertically arranged with the middle flue gas pipeline 14; the smoke outlet 20 is provided with an external thread which is connected with the sampling tube.
Continuous sampling tests in 1 hour show that the comprehensive dust filtering efficiency (calculated by weight) of the filtering device is about 99.9 percent. After the test is finished, a large amount of dust particles are deposited in the second cavity 31, the lower part of the filter element 4 has partial dust, and the upper part is clean. During the test, the sampling pipeline is not blocked, the filtering device does not need to be replaced, the dust particles are dry and easy to clean, and after the test, the gas 2 is opened and cleaned.
Each module not specifically described in the present invention may be implemented by using an existing product, and is not described herein again.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (8)
1. The front high-temperature flue gas sampling, dedusting and filtering device is characterized by comprising a hollow cavity (3) which is hollow inside, and the flue gas entering direction is followed, wherein the cavity (3) comprises a first cavity (32) and a second cavity (31) which are hollow inside and communicated with each other, a hollow gas inlet inner cavity (13) is arranged in the first cavity (32), a filter element (4) is arranged in the gas inlet inner cavity (13), one side, back to the second cavity (31), of the gas inlet inner cavity (13) is provided with a middle flue gas pipeline (14) with two open ends, the middle flue gas pipeline (14) is communicated with the inside of the first cavity (32) through two open ends, one side, back to the gas inlet inner cavity (13), of the middle flue gas pipeline (14) is communicated with the gas inlet flue gas channel (12), the gas inlet inner cavity (13) is not directly communicated with the middle flue gas pipeline (14), and a gas outlet flue gas channel (22) communicated with the gas inlet inner cavity (13) is arranged in the second cavity (31), the gas outlet flue gas channel (22) is communicated with the sampling pipe;
the flue gas gets into in the gas inlet flue gas passageway (12), and in reentrant middle flue gas pipeline (14), give off to first cavity (32) by the both ends opening part of middle flue gas pipeline (14) in, reentrant second cavity (31), the granule deposit in second cavity (31) inner wall in the flue gas, the flue gas gets into gas inlet cavity (13) afterwards in, filters through filter core (4), and the flue gas is discharged through gas outlet flue gas passageway (22).
2. The front high-temperature flue gas sampling, dedusting and filtering device as claimed in claim 1, wherein the right side of the air inlet inner cavity (13) is connected with the middle flue gas pipeline (14) through a connecting block (15) with a cylindrical structure, the upper end, the lower end and the right side of the middle flue gas pipeline (14) are provided with openings, the upper end and the lower end of the middle flue gas pipeline (14) are provided with openings communicated with the inside of the first cavity (32), and the right side of the middle flue gas pipeline (14) is provided with an opening communicated with the flue gas inlet channel (12).
3. The front high-temperature flue gas sampling, dedusting and filtering device as recited in claim 1, wherein the left side of the inlet gas inner chamber (13) is open, a plurality of limiting blocks (5) are symmetrically arranged on the inner wall of the inlet gas inner chamber (13), and the filter element (4) is detachably mounted in the inlet gas inner chamber (13) through the left side opening of the inlet gas inner chamber (13) and is limited by the limiting blocks (5).
4. The front high-temperature flue gas sampling, dedusting and filtering device as recited in claim 1, wherein the coaxial inlet gas (1) is detachably disposed on the right side of the first cavity (32), the inlet gas flue gas channel (12) penetrates through the central position inside the inlet gas (1), and the rightmost side of the inlet gas flue gas channel (12) is the flue gas inlet (10).
5. The front high-temperature flue gas sampling, dedusting and filtering device according to claim 1, wherein the coaxial gas outlet (2) is detachably arranged on the left side of the second cavity (31), the right side of the gas outlet flue gas channel (22) penetrates through the gas (2) and extends into the gas inlet inner cavity (13), and the leftmost side of the gas outlet flue gas channel (22) is provided with the flue gas outlet (20).
6. The front high-temperature flue gas sampling, dedusting and filtering device according to claim 1, wherein the inlet gas cavity (13), the first cavity (32), the inlet gas (1) on the right side of the first cavity (32), the second cavity (31) and the outlet gas (2) on the left side of the second cavity (31) are all in coaxial cylinder structures, and the cylinder diameter of the second cavity (31) is larger than that of the first cavity (32).
7. The front high-temperature flue gas sampling, dedusting and filtering device as recited in claim 1, wherein the diameter of the cylinder of the second cavity (31) is not less than 1.2 times of the diameter of the cylinder of the first cavity (32).
8. The front high-temperature flue gas sampling, dedusting and filtering device as claimed in claim 1, wherein the filter element (4) is made of high-temperature resistant filter material.
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| CN202011156104.3A CN112246061A (en) | 2020-10-26 | 2020-10-26 | Front-mounted high-temperature flue gas sampling, dedusting and filtering device |
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| CN202011156104.3A CN112246061A (en) | 2020-10-26 | 2020-10-26 | Front-mounted high-temperature flue gas sampling, dedusting and filtering device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115212711A (en) * | 2022-09-20 | 2022-10-21 | 山东金科星机电股份有限公司 | Flue gas treatment device for ore sand shipborne equipment |
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2020
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115212711A (en) * | 2022-09-20 | 2022-10-21 | 山东金科星机电股份有限公司 | Flue gas treatment device for ore sand shipborne equipment |
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