CN110145744B - Water-gas separation circulation protection device of garbage combustion chamber - Google Patents
Water-gas separation circulation protection device of garbage combustion chamber Download PDFInfo
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- CN110145744B CN110145744B CN201910379547.XA CN201910379547A CN110145744B CN 110145744 B CN110145744 B CN 110145744B CN 201910379547 A CN201910379547 A CN 201910379547A CN 110145744 B CN110145744 B CN 110145744B
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- 238000000926 separation method Methods 0.000 title claims abstract description 73
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 47
- 239000010813 municipal solid waste Substances 0.000 title claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 72
- 238000001179 sorption measurement Methods 0.000 claims description 25
- 238000010438 heat treatment Methods 0.000 claims description 9
- 239000002893 slag Substances 0.000 claims description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- 239000012535 impurity Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002361 compost Substances 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 239000010791 domestic waste Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/261—Drying gases or vapours by adsorption
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
- F23G5/46—Recuperation of heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/50—Control or safety arrangements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/80—Water
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Incineration Of Waste (AREA)
Abstract
The invention discloses a water-gas separation circulation protection device for a garbage combustion chamber, which comprises a combustion chamber, wherein a combustion furnace and a water circulation cavity are respectively arranged inside and around the combustion chamber; the upper part of the water circulation cavity is provided with a water-gas separation device which comprises a separation body, the two side ends and the bottom end of the separation body are respectively provided with a gas inlet, a gas outlet and a water outlet, the middle part in the separation body is hinged with a support plate, and the support plate and the top end of the separation body are respectively provided with a first baffle and a second baffle; the separation body, the second baffle and the support plate form an S flow channel. The invention provides a water-gas separation and circulation protection device for a garbage combustion chamber, on one hand, after water and gas in a water circulation cavity are separated by a separation device, the water balance in the water circulation cavity is ensured, the temperature in a furnace cavity is also ensured, and the service life of a combustion furnace is prolonged; on the other hand, the water outlet of the circulating water cavity preheats the circulating water inlet and then enters the water circulating cavity, so that the heat utilization rate is improved, and the combustion efficiency in the furnace chamber is improved.
Description
Technical Field
The invention relates to the technical field of garbage treatment, in particular to a water-gas separation circulation protection device for a garbage combustion chamber.
Background
The garbage is generated in daily life and production of human beingsSolid wasteDue to large discharge amount, the components are complex and various, and the product hasPolluting propertyResource, andsociality of the peopleNeed forMaking harmless、Resource recovery、Reduction ofAndsociety, its own and other related applicationsTransformingIf the treatment is not proper, the environment is polluted and the influence is causedEnvironmental sanitationThe resources are wasted, the safety of production and living is damaged, and the social harmony is damaged. The garbage disposal is to rapidly remove the garbage and carry outInnocent treatmentAnd finally, the method is reasonably utilized.
The widely used method of garbage disposal is now sanitaryFilling in landHigh temperature ofCompostAndincineration of. Most commonly used isFilling in landBut has slow effect, occupies a wide area and is easy to generate underground waterSecondary pollution. The burning method can furthest realize domestic waste's effective processing, but often in the burning process the water imbalance of circulation of water intracavity, lead to the temperature in the furnace chamber to be suddenly high suddenly low and the life of burning furnace is short, and the water heat utilization rate is low in the circulation of water intracavity simultaneously, consequently, how to reach there the water balance of circulation of water intracavity, prolong life in the furnace chamber, improve the combustion efficiency in the furnace chamber simultaneously, become the problem that technical staff in the field await the opportune moment to solve.
Disclosure of Invention
The invention aims to solve the problems, and provides a water-gas separation and circulation protection device for a garbage combustion chamber, on one hand, after water and gas in a water circulation chamber are separated by a separation device, the water balance in the water circulation chamber is ensured, meanwhile, the temperature in the furnace chamber is also ensured, and the service life of a combustion furnace is prolonged; on the other hand, the water outlet of the circulating water cavity preheats the circulating water inlet and then enters the water circulating cavity, so that the heat utilization rate is greatly improved, and the combustion efficiency in the furnace chamber is greatly improved.
In order to realize the purpose, the invention adopts the technical scheme that: the garbage incinerator comprises a combustion chamber, wherein a combustion furnace and a water circulation cavity are respectively arranged in and around the combustion chamber, a furnace chamber for garbage combustion is arranged in the combustion furnace, a garbage inlet is formed in the top of the furnace chamber, an air inlet, an air outlet and a tail gas outlet are formed in the lower part of the furnace chamber, and a slag discharge port is formed in the bottom of the furnace chamber; the upper part of the water circulation cavity is provided with a water-gas separation device through a first connecting pipeline, the water-gas separation device comprises a separation body, two side ends and the bottom end of the separation body are respectively provided with a gas inlet, a gas outlet and a water outlet, the middle part in the separation body is hinged with a support plate, a first baffle and a second baffle are respectively arranged on the support plate and the top end of the separation body, and adsorption layers are respectively arranged on the first baffle and the second baffle; the separation body, the second baffle and the support plate form an S flow channel; the lower end of the separation body is movably provided with an adsorption block; the water outlet is provided with a water storage chamber through a second connecting pipeline, and the outer side of the water storage chamber is provided with a heating device.
Furthermore, one side of the adsorption block is arranged in the fixed block, the other side of the adsorption block is arranged in the movable block, and first grooves matched with the adsorption block are formed in the fixed block and the movable block.
Furthermore, a first spring is arranged in a second groove at the bottom end of the movable block, and the vertical plate is arranged at the inner side end of the separation body in a second groove with a vertical plate at the other fixed end of the first spring.
Further, a second spring is arranged between the separation body and the support plate.
Furthermore, the two sides and the upper end of the separation body are respectively provided with a hand ring.
Furthermore, the heating device is a spiral heating lamp tube which is arranged in the shell.
Further, a first heat preservation layer is arranged inside the combustion furnace.
Furthermore, a second heat-insulating layer is arranged in the water storage chamber.
Furthermore, the first baffle and the second baffle are respectively arranged on the supporting plate and the separating body through the base, and elastic gaskets are respectively arranged between the first baffle and the supporting plate and between the second baffle and the separating body.
Further, the gas outlet of the separation body is connected with the gas collection chamber.
The invention has the beneficial effects that:
1. the invention provides a water-gas separation and circulation protection device for a garbage combustion chamber, which is characterized in that after water and gas in a water circulation cavity are separated by a separation device, the water balance in the water circulation cavity is ensured, the temperature in a furnace cavity is also ensured, and the service life of a combustion furnace is prolonged.
2. The invention provides a water-gas separation circulation protection device for a garbage combustion chamber, which is characterized in that water discharged from a circulating water cavity preheats circulating water inlet gas and then enters the water circulating cavity, so that the heat utilization rate is greatly improved, and the combustion efficiency in a furnace chamber is greatly improved.
3. The separation body, the second baffle and the support plate form an S-shaped flow passage, the separation body is hinged with the support plate, the elastic pads are arranged at the lower ends of the first baffle and the second baffle, and water and air collide and change directions in a bouncing activity space in the S-shaped flow passage, so that the separation efficiency is high, and the separation is thorough.
4. The adsorption block can effectively separate other impurities from the liquid; and the adsorption block is positioned and fixed through the fixed block and the movable block, the spring design behind the movable block has a clamping effect on the adsorption block, and the adsorption block is convenient and quick to install or replace due to the structural design and is high in efficiency.
Drawings
Fig. 1 is a front view of the structure of the present invention.
FIG. 2 is a schematic view of a water-gas separation device in the present invention.
Fig. 3 is a schematic view of the installation and connection of the water-gas separation device in the structure of the present invention.
The text labels in the figures are represented as: 1. a combustion chamber; 2. a water storage chamber; 3. a second insulating layer; 4. a heat generating device; 5. a housing; 6. a second connecting pipe; 7. a water-gas separation device; 8. a collection chamber; 9. a first connecting pipe; 101. a combustion furnace; 102. a water circulation chamber; 1011. a first insulating layer; 701. separating the body; 702. an air outlet; 703. a first baffle plate; 704. a second baffle; 705. an adsorption layer; 706. a support plate; 707. a fixed block; 708. an adsorption block; 709. a water outlet; 710. a movable block; 711. a first spring; 712. a vertical plate; 713. a hand ring; 714. a second spring; 715. an air inlet; 716. a base.
Detailed Description
The following detailed description of the present invention is given for the purpose of better understanding technical solutions of the present invention by those skilled in the art, and the present description is only exemplary and explanatory and should not be construed as limiting the scope of the present invention in any way.
As shown in fig. 1 to 3, the specific structure of the present invention is: the garbage incinerator comprises a combustion chamber 1, wherein a combustion furnace 101 and a water circulation chamber 102 are respectively arranged inside and around the combustion chamber 1, a furnace chamber for garbage combustion is arranged inside the combustion furnace 101, a garbage inlet is formed in the top of the furnace chamber, an air inlet, an air outlet and a tail gas outlet are formed in the lower portion of the furnace chamber, and a slag discharge port is formed in the bottom of the furnace chamber; the upper part of the water circulation cavity 102 is provided with a water-gas separation device 7 through a first connecting pipeline 9, the water-gas separation device 7 comprises a separation body 701, two side ends and the bottom end of the separation body 701 are respectively provided with a gas inlet 715, a gas outlet 702 and a water outlet 709, the middle part in the separation body 701 is hinged with a support plate 706, the support plate 706 and the top end of the separation body 701 are respectively provided with a first baffle 703 and a second baffle 704, and the first baffle 703 and the second baffle 704 are both provided with an adsorption layer 705; the separation body 701, the second baffle 704 and the support plate 706 form an S flow channel; the lower end of the separation body 701 is movably provided with an adsorption block 708; the water outlet 709 is provided with a water storage chamber 2 through a second connecting pipe 6, and the outer side of the water storage chamber 2 is provided with a heating device 4.
Preferably, one side of the adsorption block 708 is disposed in the fixed block 707, the other side of the adsorption block 708 is disposed in the movable block 710, and the fixed block 707 and the movable block 710 are both provided with a first groove matched with the adsorption block 708.
Preferably, a first spring 711 is disposed in a second groove at the bottom end of the movable block 710, another fixed end of the first spring 711 is disposed in a second groove of a vertical plate 712, and the vertical plate 712 is disposed at the inner end of the separation body 701.
Preferably, a second spring 714 is disposed between the separation body 701 and the support plate 706.
Preferably, the separation body 701 is provided at both sides and an upper end thereof with hand-held rings 713, respectively.
Preferably, the heat generating means 4 is provided as a spiral heat generating lamp tube arranged within the housing 5.
Preferably, the first heat insulating layer 1011 is provided inside the combustion furnace 101.
Preferably, a second insulating layer 3 is arranged inside the water storage chamber 2.
Preferably, the first baffle 703 and the second baffle 704 are respectively disposed on the supporting plate 706 and the separating body 701 through a base 716, and elastic gaskets are disposed between the first baffle 703 and the supporting plate 706 and between the second baffle 704 and the separating body 701.
Preferably, the gas outlet 702 of the separation body 701 is connected to the gas collection chamber 8.
The working principle is as follows: garbage is put into a combustion furnace 101 to be combusted in a water circulation cavity 102 so as to provide heat for protecting the temperature in the furnace. The water circulation cavity 102 is provided with the water-gas separation device 7 to ensure the water balance in the water circulation cavity 102 and the temperature in the furnace chamber, and the service life of the combustion furnace 101 is prolonged, water gas passes through the separation body 701, the second baffle plate 704 and the support plate 706 of the water-gas separation device 7 to form an S flow channel, the separation body 701 is hinged with the support plate 706, the lower ends of the first baffle plate 703 and the second baffle plate 704 are provided with elastic pads, the water gas collides and changes direction in a bouncing activity space in the S flow channel, and the adsorption layer 705 has impurity removal effect on the water gas; the separation efficiency is high, and the separation is thorough; the aqueous vapor is gaseous to be discharged gas collection room 8 through gas outlet 702 after S runner separation and is collected, the water of separating out has further dust removal effect through absorption piece 708, the water after the edulcoration passes through second connecting tube 6 and gets into reservoir chamber 2, water accessible heating device 4 in the reservoir chamber 2 gets into water circulation chamber 102 once more after preheating, has not only guaranteed the water balance in the water circulation chamber 102, still improves heat utilization efficiency greatly, improves burning efficiency in the furnace chamber greatly.
The adsorption block 708 is positioned and fixed through the fixed block 707 and the movable block 710, the first spring 711 behind the movable block 710 has a clamping effect on the adsorption block 708, and the adsorption block 708 is convenient and quick to mount or replace due to the structural design, and is high in efficiency.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts of the present invention. The foregoing is only a preferred embodiment of the present invention, and it should be noted that there are objectively infinite specific structures due to the limited character expressions, and it will be apparent to those skilled in the art that a plurality of modifications, decorations or changes may be made without departing from the principle of the present invention, and the technical features described above may be combined in a suitable manner; such modifications, variations, combinations, or adaptations of the invention using its spirit and scope, as defined by the claims, may be directed to other uses and embodiments.
Claims (7)
1. A water-gas separation circulation protection device of a garbage combustion chamber comprises a combustion chamber (1), and is characterized in that a combustion furnace (101) and a water circulation cavity (102) are respectively arranged inside and around the combustion chamber (1), a furnace chamber for garbage combustion is arranged inside the combustion furnace (101), a garbage inlet is arranged at the top of the furnace chamber, an air inlet, an air outlet and a tail gas outlet are arranged at the lower part of the furnace chamber, and a slag discharge port is arranged at the bottom of the furnace chamber; the upper part of the water circulation cavity (102) is provided with a water-gas separation device (7) through a first connecting pipeline (9), the water-gas separation device (7) comprises a separation body (701), the two side ends and the bottom end of the separation body (701) are respectively provided with a gas inlet (715), a gas outlet (702) and a water outlet (709), the middle part in the separation body (701) is hinged with a support plate (706), and a second spring (714) is arranged between the separation body (701) and the support plate (706); a first baffle (703) and a second baffle (704) are respectively arranged on the supporting plate (706) and the top end of the separating body (701), and adsorption layers (705) are respectively arranged on the first baffle (703) and the second baffle (704); the separation body (701), the second baffle (704) and the support plate (706) form an S flow channel; an adsorption block (708) is movably arranged at the lower end of the separation body (701), one side of the adsorption block (708) is arranged in a fixed block (707), the other side of the adsorption block is arranged in a movable block (710), the fixed block (707) and the movable block (710) are respectively provided with a first groove matched with the adsorption block (708), a first spring (711) is arranged in a second groove at the bottom end of the movable block (710), the other fixed end of the first spring (711) is arranged in a second groove of a vertical plate (712), and the vertical plate (712) is arranged at the inner side end of the separation body (701); the water outlet (709) is provided with a water storage chamber (2) through a second connecting pipeline (6), and the outer side of the water storage chamber (2) is provided with a heating device (4).
2. A water-gas separation circulation protection device for a garbage combustion chamber as defined in claim 1, wherein the two sides and the upper end of the separation body (701) are respectively provided with a hand ring (713).
3. A water-gas separation circulation protection device for a garbage combustion chamber according to claim 1, characterized in that the heating device (4) is provided as a spiral heating lamp tube, and the spiral heating lamp tube is provided in the housing (5).
4. A water-gas separation and circulation protection device for a garbage combustion chamber as defined in claim 1, wherein the first heat-insulating layer (1011) is provided inside the combustion furnace (101).
5. A water-gas separation and circulation protection device for a garbage combustion chamber as defined in claim 1, wherein a second insulating layer (3) is arranged inside the water storage chamber (2).
6. The water-gas separation circulation protection device for the garbage combustion chamber is characterized in that the first baffle (703) and the second baffle (704) are respectively arranged on the supporting plate (706) and the separating body (701) through the base (716), and elastic gaskets are respectively arranged between the first baffle (703) and the supporting plate (706) and between the second baffle (704) and the separating body (701).
7. A water-gas separation and circulation protection device for a garbage combustion chamber, as claimed in claim 1, characterized in that the gas outlet (702) of the separation body (701) is connected to the gas collection chamber (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910379547.XA CN110145744B (en) | 2019-05-08 | 2019-05-08 | Water-gas separation circulation protection device of garbage combustion chamber |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910379547.XA CN110145744B (en) | 2019-05-08 | 2019-05-08 | Water-gas separation circulation protection device of garbage combustion chamber |
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| Publication Number | Publication Date |
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| CN110145744A CN110145744A (en) | 2019-08-20 |
| CN110145744B true CN110145744B (en) | 2020-10-16 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102989293A (en) * | 2012-11-22 | 2013-03-27 | 于文祥 | Desulfurization/denitrification/denitration dust-removing system |
| CN104096445A (en) * | 2014-07-25 | 2014-10-15 | 浙江新昌三瑞香雪冲业有限公司 | Gas-liquid separator |
| CN206424777U (en) * | 2017-03-02 | 2017-08-22 | 山东省同泰维润食品科技有限公司 | A kind of boiler afterheat reclaims desulfuring and denitrifying apparatus |
| CN206430167U (en) * | 2017-01-16 | 2017-08-22 | 无锡博勒能源科技有限公司 | A kind of horizontal waste incineration heat recovery boiler |
| CN107289447A (en) * | 2016-04-04 | 2017-10-24 | 申光燮 | Burning boiler |
| CN208727083U (en) * | 2018-08-01 | 2019-04-12 | 宜昌元龙塑模技术开发有限责任公司 | Dedusting chamber device |
-
2019
- 2019-05-08 CN CN201910379547.XA patent/CN110145744B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102989293A (en) * | 2012-11-22 | 2013-03-27 | 于文祥 | Desulfurization/denitrification/denitration dust-removing system |
| CN104096445A (en) * | 2014-07-25 | 2014-10-15 | 浙江新昌三瑞香雪冲业有限公司 | Gas-liquid separator |
| CN107289447A (en) * | 2016-04-04 | 2017-10-24 | 申光燮 | Burning boiler |
| CN206430167U (en) * | 2017-01-16 | 2017-08-22 | 无锡博勒能源科技有限公司 | A kind of horizontal waste incineration heat recovery boiler |
| CN206424777U (en) * | 2017-03-02 | 2017-08-22 | 山东省同泰维润食品科技有限公司 | A kind of boiler afterheat reclaims desulfuring and denitrifying apparatus |
| CN208727083U (en) * | 2018-08-01 | 2019-04-12 | 宜昌元龙塑模技术开发有限责任公司 | Dedusting chamber device |
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| CN110145744A (en) | 2019-08-20 |
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Effective date of registration: 20221221 Address after: 418500 Huangbai village, Shuangjiang Town, Tongdao Dong Autonomous County, Huaihua City, Hunan Province (industrial concentration area) Patentee after: Hunan Weiming Environmental Protection Technology Co.,Ltd. Address before: 418500 Huangbai village industrial concentration zone, Shuangjiang Town, Tongdao Dong Autonomous County, Huaihua City, Hunan Province Patentee before: WEIMING HEYI BIOLOGICAL ENVIRONMENTAL PROTECTION Co.,Ltd. |
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Effective date of registration: 20240611 Address after: Room 901, Zone 13, No. 1507 Fanghu Second Road, Huli District, Xiamen City, Fujian Province, 361000 Patentee after: Xiamen Weiming Environmental Protection Technology Co.,Ltd. Country or region after: China Address before: 418500 Huangbai village, Shuangjiang Town, Tongdao Dong Autonomous County, Huaihua City, Hunan Province (industrial concentration area) Patentee before: Hunan Weiming Environmental Protection Technology Co.,Ltd. Country or region before: China |