CN211799395U - Desulfurization and denitrification integrated system - Google Patents
Desulfurization and denitrification integrated system Download PDFInfo
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- CN211799395U CN211799395U CN201921834863.3U CN201921834863U CN211799395U CN 211799395 U CN211799395 U CN 211799395U CN 201921834863 U CN201921834863 U CN 201921834863U CN 211799395 U CN211799395 U CN 211799395U
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- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 52
- 230000023556 desulfurization Effects 0.000 title claims abstract description 52
- 239000000428 dust Substances 0.000 claims abstract description 20
- 239000002912 waste gas Substances 0.000 claims abstract description 20
- 239000007788 liquid Substances 0.000 claims description 7
- 230000000903 blocking effect Effects 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 238000009826 distribution Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000007789 gas Substances 0.000 abstract description 50
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 16
- 239000003546 flue gas Substances 0.000 abstract description 16
- 238000004887 air purification Methods 0.000 abstract description 3
- 230000010354 integration Effects 0.000 abstract description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 11
- 238000000034 method Methods 0.000 description 10
- 239000000523 sample Substances 0.000 description 8
- 239000002245 particle Substances 0.000 description 7
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 229910052815 sulfur oxide Inorganic materials 0.000 description 6
- 238000001514 detection method Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 239000000779 smoke Substances 0.000 description 4
- 238000001179 sorption measurement Methods 0.000 description 4
- 238000007689 inspection Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 230000003009 desulfurizing effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical class S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 239000000383 hazardous chemical Substances 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
The utility model relates to the field of air purification, a SOx/NOx control integration system is related to, including SOx/NOx control tower and gas wash tower, the gas wash tower is located SOx/NOx control tower one side, SOx/NOx control tower bottom one side is equipped with the exhaust pipe, SOx/NOx control tower up end is equipped with first air supply pipe, the gas wash tower is close to SOx/NOx control tower one side bottom is equipped with the second air supply pipe; flue gas through SOx/NOx control discharges the flue gas that purifies through first blast pipe, the flue gas is through the defeated part of forwardding, detect through air test module, qualified flue gas is sent to and is removed dust in the gas wash tower, unqualified gas promotes the sprue through the cylinder and slides, thereby seal the second blast pipe, carry out the secondary desulfurization in sending to the waste gas pipe through first conveyer pipe, qualified gas removes dust through the gas wash tower, qualified gas discharges through the discharge pipe, unqualified gas carries out the secondary through the defeated part of forwardding and removes dust.
Description
Technical Field
The utility model belongs to the air purification field specifically is SOx/NOx control integration system.
Background
The flue gas desulfurization and denitration technology is a boiler flue gas purification technology applied to the chemical industry of generating multi-nitrogen oxides and sulfur oxides, the nitrogen oxides and the sulfur oxides are one of main sources of air pollution, so the application of the technology has a great benefit on environmental air purification, and the currently known flue gas desulfurization and denitration technologies comprise a PAFP (polyamidp process), an ACFP (Acfp (Acrylonitrile-oriented carbon) process, an electron beam ammonia process, a pulse corona process, a gypsum wet process, a catalytic oxidation process, a microbial degradation method and the like.
The Chinese patent discloses a flue gas dedusting, desulfurizing and denitrifying integrated system and a method, the system is disclosed as (CN105056683B), the removal rate of SO2 can reach more than 95%, the removal rate of NOX and dust (PM) is about 50-80%, the removal efficiency is high, but in the process of desulfurizing and denitrifying, a small amount of hazardous substances are still discharged, and omission still exists. Therefore, those skilled in the art have provided integrated desulfurization and denitrification systems to solve the problems set forth in the background art.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a SOx/NOx control integration system to solve the problem that proposes in the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
the desulfurization and denitrification integrated system comprises a desulfurization and denitrification tower and a dedusting tower, wherein the dedusting tower is positioned on one side of the desulfurization and denitrification tower, a waste gas pipe is arranged on one side of the bottom of the desulfurization and denitrification tower, the waste gas pipe is far away from one end of the desulfurization and denitrification tower, an air inlet fan box is installed at one end of the desulfurization and denitrification tower, a first air supply pipe is arranged on the upper end surface of the desulfurization and denitrification tower, a second air supply pipe is arranged at the bottom of one side, close to the dedusting tower, of the desulfurization and denitrification tower, the first air supply pipe and the second air supply pipe are in sealing connection through a transfer part, a control part is arranged in the transfer part, a first conveying pipe is arranged on one side, close to the air inlet fan box, of the transfer part, the first conveying pipe is communicated with the transfer part and the waste gas pipe, the control part comprises a cylinder fixedly connected to the inner, the through-hole has been seted up to sprue up end, sprue sliding connection be in the inner wall of first conveyer pipe, the gas wash tower up end is equipped with the delivery pipe, pass through on the delivery pipe defeated part is equipped with the control unit, defeated part one end is equipped with the second conveyer pipe, second conveyer pipe intercommunication defeated part with the gas wash tower inner chamber, gas wash tower inner wall sliding connection has filter screen part, four symmetric distribution's of gas wash tower inner wall top surface fixedly connected with electric telescopic handle, electric telescopic handle and external power source electric connection, the electric telescopic handle output is fixed connection respectively in the four corners department of filter screen part up end.
As a further aspect of the present invention: the filter screen component is composed of a plurality of vertically distributed filter screens.
As a further aspect of the present invention: and a drain pipe is arranged at the bottom of the dust removing tower.
As a further aspect of the present invention: and an air supply fan is arranged on the inner wall of the second air supply pipe and is electrically connected with an external power supply.
As a further aspect of the present invention: the dust removal tower is internally provided with liquid water, the second air supply pipe is positioned above the liquid level surface, and the bottom end of the second conveying pipe is as high as the second air supply pipe.
As a further aspect of the present invention: one end of the plugging block, which is far away from the cylinder, is provided with a guide slope surface.
As a further aspect of the present invention: the distance between the through hole and the guide slope surface is larger than the width of the cavity of the transferring component.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the flue gas subjected to desulfurization and denitrification is discharged through a first gas supply pipe, the flue gas is detected through an air inspection module in a transferring part, the qualified flue gas is detected and sent into a dedusting tower through a second gas supply pipe for dedusting, unqualified gas is controlled by an air inspection module to push a blocking block to slide, so that the second gas supply pipe is closed, the qualified gas is sent into a waste gas pipe through a first conveying pipe for secondary desulfurization, the qualified gas is dedusted through the dedusting tower, the qualified gas is discharged through a discharge pipe, and the unqualified gas is subjected to secondary dedusting through the transferring part;
2. the utility model discloses an electric telescopic handle control filter screen part, after the flue gas filters the particulate matter through the filter screen, long-term use probably leads to filter screen adsorption effect to reduce, drives the filter screen through electric telescopic handle this moment and slides downwards, contacts with the liquid water of gas wash tower bottom surface to reach the effect of clearance.
Drawings
FIG. 1 is a schematic structural diagram of a desulfurization and denitrification integrated system;
FIG. 2 is a schematic cross-sectional view of a transportation component in the integrated desulfurization and denitrification system;
FIG. 3 is a schematic sectional view of a dedusting tower in the integrated desulfurization and denitrification system;
FIG. 4 is a schematic system flow diagram of the integrated desulfurization and denitrification system.
In the figure: 1. a desulfurization and denitrification tower; 11. a first air supply pipe; 12. an exhaust gas pipe; 13. a first delivery pipe; 2. an air inlet fan box; 3. a transfer component; 4. a control component; 41. a cylinder; 42. blocking; 421. a through hole; 422. guiding the slope surface; 5. a dedusting tower; 51. a discharge pipe; 52. a second delivery pipe; 53. a second air supply pipe; 6. an air inspection module; 61. a gas probe; 62. a relay module; 7. an air supply fan; 8. a screen member; 81. an electric telescopic rod; 9. a particle detection module.
Detailed Description
Referring to fig. 1 to 4, in the embodiment of the present invention, a desulfurization and denitrification integrated system includes a desulfurization and denitrification tower 1 and a dedusting tower 5, the dedusting tower 5 is located on one side of the desulfurization and denitrification tower 1, a waste gas pipe 12 is located on one side of the bottom of the desulfurization and denitrification tower 1, an air inlet fan box 2 is installed on one end of the waste gas pipe 12 away from the desulfurization and denitrification tower 1, a first air supply pipe 11 is located on the upper end surface of the desulfurization and denitrification tower 1, a second air supply pipe 53 is located on the bottom of the dedusting tower 5 near the side of the desulfurization and denitrification tower 1, the first air supply pipe 11 and the second air supply pipe 53 are hermetically connected through a transfer part 3, a control part 4 is located inside the transfer part 3, a first conveying pipe 13 is located on one side of the transfer part 3 near the air inlet fan box 2, the first conveying pipe 13 communicates the transfer part 3 and the waste gas pipe 12, the control part 4 includes a, 41 output end fixedly connected with sprue 42 of cylinder, through-hole 421 has been seted up to sprue 42 up end, sprue 42 sliding connection is at the inner wall of first conveyer pipe 13, 5 up ends in gas wash tower are equipped with delivery pipe 51, be equipped with control part 4 through defeated part 3 of delivery on delivery pipe 51, 3 one end of defeated part is equipped with second conveyer pipe 52, second conveyer pipe 52 intercommunication defeated part 3 and 5 inner chambers in gas wash tower, 5 inner wall sliding connection in gas wash tower has filter screen part 8, electric telescopic handle 81 of 5 inner wall top surfaces fixedly connected with four symmetric distribution in gas wash tower, electric telescopic handle 81 and external power source electric connection, electric telescopic handle 81 output difference fixed connection is in the four corners department of filter screen part 8 up end.
In fig. 1: the dedusting tower 5 is positioned at one side of the desulfurization and denitrification tower 1, a waste gas pipe 12 is arranged at one side of the bottom of the desulfurization and denitrification tower 1, an air inlet fan box 2 is arranged at one end, far away from the desulfurization and denitrification tower 1, of the waste gas pipe 12, a fan is arranged in the air inlet fan box 2, the waste gas is driven by the fan to be conveyed to the desulfurization and denitrification tower 1 through the waste gas pipe 12 for desulfurization, a first air supply pipe 11 is arranged on the upper end face of the desulfurization and denitrification tower 1, a second air supply pipe 53 is arranged at the bottom of the dedusting tower 5, close to the desulfurization and denitrification tower 1, the first air supply pipe 11 and the second air supply pipe 53 are in sealed connection through a transfer part 3, two ends of the transfer part 3 are respectively in sealed connection with the first air supply pipe 11 and the second air supply pipe 53, the discharged gas subjected to desulfurization and denitrification is subjected to adjustment of the transmission direction through the transfer part 3, a control part 4 is arranged in the transfer part 3, the control part 4 controls, the first delivery pipe 13 communicates with the transfer unit 3 and the exhaust gas pipe 12, the control unit 4 controls the first air supply pipe 11 to communicate with the exhaust gas pipe 12 through the first delivery pipe 13, and the second delivery pipe 11 communicates with the second air supply pipe 53.
In fig. 2: the control part 4 comprises an air cylinder 41 fixedly connected with the inner wall of the transferring part 3, the air cylinder 41 is connected with an external air source in a sealing way, the model of the air cylinder 41 is MPT-63, the output end of the air cylinder 41 is fixedly connected with a block 42, the upper end surface of the block 42 is provided with a through hole 421, the block 42 is connected with the inner wall of the first conveying pipe 13 in a sliding way, when the block 42 is pushed into the first conveying pipe 13, the first air supply pipe 11 is communicated with the second air supply pipe 53 through the through hole 421, the smoke is conveyed into the dust removing tower 5 through the second air supply pipe 53, the upper end surface of the dust removing tower 5 is provided with a discharge pipe 51, qualified smoke is conveyed to the outside through the discharge pipe 51, the outer wall of the transferring part 3 positioned at one end of the first air supply pipe 11 is provided with an air checking module 6, the air checking module 6 comprises a relay module 62 and a gas probe 61, two gas probe 61 all are located the jam 42 top, two gas probe 61 models are SKA/NE-PL and RS485 respectively, two gas probe 61 detect sulfur dioxide and nitrogen oxide respectively, relay module 62 model is XM-186, gas probe 61 and relay module 62 signal connection, relay module 62 and 41 signal connection of cylinder, sulfur dioxide and nitrogen oxide content through gas probe 61 detection, opening and closing through relay module 62 control cylinder 41, jam 42 is kept away from 41 one end of cylinder and is had the domatic 422 of direction, the distance between through-hole 421 and the domatic 422 of direction is greater than the width of cavity, when through-hole 421 slides to keeping away from first conveyer pipe 13, gas flows to first conveyer pipe 13 through the domatic 422 of direction, thereby reach the effect of carrying.
In fig. 3: the control part 4 is arranged on the discharge pipe 51 through the transferring part 3, one end of the transferring part 3 is provided with a second delivery pipe 52, the second delivery pipe 52 is communicated with the inner cavities of the transferring part 3 and the dedusting tower 5, the discharge pipe 51 is controlled by the transferring part 3, the inner wall of the dedusting tower 5 is connected with a filter screen part 8 in a sliding way, the filter screen part 8 adsorbs particles in the smoke to achieve the filtering effect, the top surface of the inner wall of the dedusting tower 5 is fixedly connected with four electric telescopic rods 81 which are symmetrically distributed, the electric telescopic rods 81 are electrically connected with an external power supply, the output ends of the electric telescopic rods 81 are respectively and fixedly connected with four corners of the upper end surface of the filter screen part 8, after the smoke filters the particles through the filter screen part 8, the filter screen adsorption effect is possibly reduced due to long-term use, at the moment, the electric telescopic rods 81 drive the filter, thereby reach the effect of clearance, particle detection module 9 is installed to the dust removal tower 5 inner wall, particle detection module 9 and cylinder 41 signal connection, particle detection module 9 model is RS485, air supply fan 7 is installed to second air supply pipe 53 inner wall, air supply fan 7 and external power source electric connection, the dust removal tower 5 is inside to have liquid water, second air supply pipe 53 is located the level surface top, second conveyer pipe 52 bottom and second air supply pipe 53 are as high as each other, air supply fan 7 carries the gas after the SOx/NOx control.
In fig. 4: flue gas through SOx/NOx control passes through first blast pipe 11, the flue gas is in defeated part 3 of process of transshipping, detect through air test module 6, it removes dust to send to gas wash tower 5 in through second blast pipe 53 to detect qualified flue gas, unqualified gas passes through air test module 6 control cylinder 41 and promotes the sliding of sprue 42, thereby seal second blast pipe 53, send to the interior secondary desulfurization that carries out of exhaust pipe 12 through first conveyer pipe 13, qualified gas removes dust through gas wash tower 5, qualified gas discharges through delivery pipe 51, unqualified gas carries out the secondary through defeated part 3 and removes dust.
The utility model discloses a theory of operation is: the waste gas is conveyed into a waste gas pipe 12 through an air inlet fan box 2, the waste gas is subjected to desulfurization and denitration through a desulfurization and denitration tower 1, the gas after being desulfurized is conveyed into a conveying part 3 through a first air supply pipe 11, the gas is detected through a gas probe 61, the gas is driven to be pushed by a cylinder 41 through a relay module 62 after being qualified, so that a blocking block 42 is pushed into a first conveying pipe 13, a through hole 421 is communicated with the first air supply pipe 11 and a second air supply pipe 53, the waste gas after being desulfurized and denitrated is driven to be conveyed into a dedusting tower 5 through an air supply fan 7, the waste gas is filtered through a filter screen part 8, when the adsorption rate of a filter screen is reduced after long-time filtering, an electric telescopic rod 81 is controlled to move up and down, so that the filter screen part 8 is contacted with liquid water on the bottom surface of the dedusting tower 5 for cleaning, the adsorption efficiency is improved, the flue gas after, when the content of the particles is found to be unqualified, the control part 4 closes the transferring part 3, so that the gas is conveyed to the bottom of the dust removing tower 5 through the second conveying pipe 52 for secondary dust removal.
The above-mentioned, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (7)
1. The integrated desulfurization and denitrification system comprises a desulfurization and denitrification tower (1) and a dedusting tower (5), wherein the dedusting tower (5) is positioned on one side of the desulfurization and denitrification tower (1), and is characterized in that a waste gas pipe (12) is arranged on one side of the bottom of the desulfurization and denitrification tower (1), an air inlet fan box (2) is installed at one end, away from the desulfurization and denitrification tower (1), of the waste gas pipe (12), a first air supply pipe (11) is arranged on the upper end face of the desulfurization and denitrification tower (1), a second air supply pipe (53) is arranged at the bottom of the dedusting tower (5), close to one side of the desulfurization and denitrification tower (1), and the first air supply pipe (11) and the second air supply pipe (53) are in sealing connection through a transfer part (3);
a control component (4) is arranged inside the transferring component (3), a first conveying pipe (13) is arranged on one side, close to the air inlet fan box (2), of the transferring component (3), the first conveying pipe (13) is communicated with the transferring component (3) and the waste gas pipe (12), the control component (4) comprises an air cylinder (41) fixedly connected to the inner wall of the transferring component (3), the air cylinder (41) is hermetically connected with an external air source, a blocking block (42) is fixedly connected to the output end of the air cylinder (41), a through hole (421) is formed in the upper end face of the blocking block (42), and the blocking block (42) is slidably connected to the inner wall of the first conveying pipe (13);
dust removal tower (5) up end is equipped with delivery pipe (51), pass through on delivery pipe (51) defeated part (3) are equipped with control unit (4), defeated part (3) one end of commentaries on classics is equipped with second conveyer pipe (52), second conveyer pipe (52) intercommunication defeated part (3) with dust removal tower (5) inner chamber, dust removal tower (5) inner wall sliding connection has filter screen part (8), electric telescopic handle (81) of four symmetric distributions of dust removal tower (5) inner wall top surface fixedly connected with, electric telescopic handle (81) and external power source electric connection, electric telescopic handle (81) output difference fixed connection be in the four corners department of filter screen part (8) up end.
2. Integrated desulfurization and denitrification system according to claim 1, wherein said screen member (8) is composed of a plurality of vertically distributed screens.
3. The integrated desulfurization and denitrification system according to claim 1, wherein a drain pipe is arranged at the bottom of the dust removal tower (5).
4. The integrated desulfurization and denitrification system according to claim 1, wherein an air supply fan (7) is installed on an inner wall of the second air supply pipe (53), and the air supply fan (7) is electrically connected to an external power supply.
5. The integrated desulfurization and denitrification system according to claim 1, wherein the dedusting tower (5) has liquid water therein, the second air supply pipe (53) is located above a liquid level, and the bottom end of the second conveying pipe (52) is at the same height as the second air supply pipe (53).
6. The integrated desulfurization and denitrification system according to claim 1, wherein the end of the plug (42) away from the cylinder (41) is provided with a guide slope surface (422).
7. The integrated desulfurization and denitrification system according to claim 6, wherein the distance between the through hole (421) and the guide slope surface (422) is larger than the width of the cavity of the transportation component (3).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921834863.3U CN211799395U (en) | 2019-10-29 | 2019-10-29 | Desulfurization and denitrification integrated system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921834863.3U CN211799395U (en) | 2019-10-29 | 2019-10-29 | Desulfurization and denitrification integrated system |
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| CN211799395U true CN211799395U (en) | 2020-10-30 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112915657A (en) * | 2021-01-27 | 2021-06-08 | 陆未沫 | High-efficient exhaust purification processing apparatus |
| CN115337731A (en) * | 2022-10-17 | 2022-11-15 | 中节能(汕头潮南)环保能源有限公司 | Integrated desulfurization negative pressure dust removal equipment for waste incineration boiler and dust removal method thereof |
| CN115646176A (en) * | 2022-09-28 | 2023-01-31 | 江苏升辉装备集团股份有限公司 | Reaction tower for pollution prevention and control and use method thereof |
-
2019
- 2019-10-29 CN CN201921834863.3U patent/CN211799395U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112915657A (en) * | 2021-01-27 | 2021-06-08 | 陆未沫 | High-efficient exhaust purification processing apparatus |
| CN115646176A (en) * | 2022-09-28 | 2023-01-31 | 江苏升辉装备集团股份有限公司 | Reaction tower for pollution prevention and control and use method thereof |
| CN115646176B (en) * | 2022-09-28 | 2024-06-25 | 江苏升辉装备集团股份有限公司 | Reaction tower for pollution control and application method thereof |
| CN115337731A (en) * | 2022-10-17 | 2022-11-15 | 中节能(汕头潮南)环保能源有限公司 | Integrated desulfurization negative pressure dust removal equipment for waste incineration boiler and dust removal method thereof |
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Effective date of registration: 20211118 Address after: 450000 1608, block B, Xingye building, No. 22 nongnong Ye Road, Jinshui District, Zhengzhou City, Henan Province Patentee after: Zhengzhou HengAn Environmental Treatment Engineering Co.,Ltd. Address before: 525000 702, building 5, 198 Zhanqian Sixth Road, Maoming City, Guangdong Province Patentee before: Chen Huanlin |