CN111252470A - Double-chain feeding device of straw combustion boiler - Google Patents
Double-chain feeding device of straw combustion boiler Download PDFInfo
- Publication number
- CN111252470A CN111252470A CN202010262725.3A CN202010262725A CN111252470A CN 111252470 A CN111252470 A CN 111252470A CN 202010262725 A CN202010262725 A CN 202010262725A CN 111252470 A CN111252470 A CN 111252470A
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- CN
- China
- Prior art keywords
- chain
- scraper
- double
- feeding device
- combustion boiler
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- 239000010902 straw Substances 0.000 title claims abstract description 28
- 238000002485 combustion reaction Methods 0.000 title claims description 12
- 239000000446 fuel Substances 0.000 claims abstract description 30
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 15
- 230000005540 biological transmission Effects 0.000 claims abstract description 9
- 230000003014 reinforcing effect Effects 0.000 claims description 2
- 239000000463 material Substances 0.000 description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G23/00—Driving gear for endless conveyors; Belt- or chain-tensioning arrangements
- B65G23/02—Belt- or chain-engaging elements
- B65G23/04—Drums, rollers, or wheels
- B65G23/06—Drums, rollers, or wheels with projections engaging abutments on belts or chains, e.g. sprocket wheels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G19/00—Conveyors comprising an impeller or a series of impellers carried by an endless traction element and arranged to move articles or materials over a supporting surface or underlying material, e.g. endless scraper conveyors
- B65G19/18—Details
- B65G19/185—Details for article conveyors, e.g. for container conveyors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G19/00—Conveyors comprising an impeller or a series of impellers carried by an endless traction element and arranged to move articles or materials over a supporting surface or underlying material, e.g. endless scraper conveyors
- B65G19/18—Details
- B65G19/20—Traction chains, ropes, or cables
- B65G19/205—Traction chains, ropes, or cables for article conveyors, e.g. for container conveyors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G19/00—Conveyors comprising an impeller or a series of impellers carried by an endless traction element and arranged to move articles or materials over a supporting surface or underlying material, e.g. endless scraper conveyors
- B65G19/18—Details
- B65G19/22—Impellers, e.g. push-plates, scrapers; Guiding means therefor
- B65G19/24—Attachment of impellers to traction element
- B65G19/26—Attachment of impellers to traction element pivotal
- B65G19/265—Attachment of impellers to traction element pivotal for article conveyors, e.g. for container conveyors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G23/00—Driving gear for endless conveyors; Belt- or chain-tensioning arrangements
- B65G23/24—Gearing between driving motor and belt- or chain-engaging elements
- B65G23/30—Variable-speed gearing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G23/00—Driving gear for endless conveyors; Belt- or chain-tensioning arrangements
- B65G23/44—Belt or chain tensioning arrangements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G47/00—Article or material-handling devices associated with conveyors; Methods employing such devices
- B65G47/22—Devices influencing the relative position or the attitude of articles during transit by conveyors
- B65G47/24—Devices influencing the relative position or the attitude of articles during transit by conveyors orientating the articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G2201/00—Indexing codes relating to handling devices, e.g. conveyors, characterised by the type of product or load being conveyed or handled
- B65G2201/02—Articles
- B65G2201/0235—Containers
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pusher Or Impeller Conveyors (AREA)
Abstract
The utility model provides a straw burning boiler's double-chain loading attachment, belongs to conveyer technical field, the device includes transmission, transmission includes chain, first driven sprocket, second driven sprocket, set up two chains between first driven sprocket, the second driven sprocket, the speed reducer sprocket of second driven sprocket and speed reducer links to each other through drive chain, transmission arranges in on the frame, the frame both sides are equipped with the fuel deflector, be equipped with first scraper blade on the chain, be equipped with the second scraper blade between two chains. The device can directly put in fuel outside the boiler room, greatly saves the floor area of the boiler room, and improves the efficiency of putting in fuel.
Description
Technical Field
The invention belongs to the technical field of conveying devices, and particularly relates to a double-chain feeding device of a straw combustion boiler.
Background
The diameter of the round-packed straw is 1250mm, the length of the round-packed straw is 1200mm, and the weight of the round-packed straw is more than 200 KG. Because the volume and the weight of the round-wrapped straw are too large, the feeding mode of the existing boiler taking the round-wrapped straw as fuel is that a forklift or a material grabbing vehicle transports the straw bundle into a boiler room, and then the bundle fuel is put on a bearing platform of a pusher to finish the feeding process. However, as the feeding is carried out in the boiler room, vehicles such as a forklift go in and out back and forth to bring outdoor cold air into the room, the indoor temperature is rapidly reduced, and the forklift has severe requirements on the stopping position and angle of the forklift during feeding, so that the feeding efficiency is directly influenced. If the feeding is carried out in a double-channel mode, the forklift feeding is more labor-consuming, the stopping position of the forklift must be arranged on two sides of the boiler, and the occupied area is very large.
Disclosure of Invention
In order to solve the technical problem, the invention provides the double-chain feeding device of the straw combustion boiler, and the device can be used for directly feeding fuel outside a boiler room, so that the floor area of the boiler room is greatly saved, and the fuel feeding efficiency is improved.
The invention adopts the following technical scheme:
the utility model provides a double-chain loading attachment of straw burning boiler, the device includes transmission, transmission includes chain, first driven sprocket, second driven sprocket, set up two chains between first driven sprocket, the second driven sprocket, the speed reducer sprocket of second driven sprocket and speed reducer links to each other through drive chain, transmission arranges in on the frame, the frame both sides are equipped with the fuel deflector, be equipped with first scraper blade on the chain, be equipped with the second scraper blade between two chains.
Furthermore, one side of the first driven chain wheel is arranged outdoors, and one side of the second driven chain wheel is arranged indoors.
Furthermore, a chain tensioner is arranged on one side of the first driven chain wheel.
Furthermore, the fuel guide plates are provided with reinforcing rib plates, the fuel guide plates are obliquely arranged from the center of the frame to the left and right, and the radian between the two fuel guide plates is consistent with the outer arc of the round-wrapped straw.
Furthermore, a travel switch assembly is arranged on one side of the second driven chain wheel.
Furthermore, a chain scraper bracket is arranged below the chain.
Further, first scraper blade equidistance sets up on every chain, second scraper blade equidistance sets up between two chains, first scraper blade, second scraper blade interval cross arrangement.
Furthermore, the upper portion of the first scraper is arc-shaped and protrudes upwards, grooves are formed in two sides of the upper portion of the second scraper, and shafts and shaft sleeves are arranged in the grooves.
Further, the shaft sleeve at the top end of the second scraper is slightly higher than the top of the first scraper.
The invention has the advantages and beneficial effects that:
according to the invention, the fuel guide plate is arranged, and the scraper chain is utilized to transmit the large round bag from the outside of the boiler room to the inside of the boiler room, so that a large amount of cold air is prevented from entering the boiler room, fuel is directly put outside the boiler room, the fuel putting efficiency is improved, the requirements on the stopping position and angle of a forklift and a material grabbing machine are not high, and the floor area of the boiler room is saved.
The device has overcome the drawback that the single chain material loading machine exists, if the circle package straw becomes soft because the condition influence such as the long or humidity of save time, takes place to warp easily, can paste below the circle package on both sides backplate, and the centre can be sunken like this, leads to the scraper blade to scrape can not reach the material package. Meanwhile, the contact area between the round-wrapped straws and the guard plates on the two sides of the feeding machine is increased, the friction resistance is increased, and the scraper belt does not walk the round-wrapped straws. A double strand feeder can solve this problem.
The invention can directly put fuel outside the boiler room, thereby greatly saving the floor area of the boiler room and improving the efficiency of putting fuel. The requirements on the stop position and the angle of the forklift are not high when fuel is put in, a large amount of cold air is prevented from entering a boiler room, and the condition that the feeding is influenced because the bale is damped and deformed or the bale is expanded, so that the scraping plate cannot scrape the bale is avoided.
Drawings
FIG. 1 is a schematic front view of a double-chain feeding device according to the present invention;
FIG. 2 is a schematic side view of the double-chain feeding device of the present invention;
FIG. 3 is a schematic top view of the double-chain feeding device of the present invention;
FIG. 4 is an enlarged view of portion A of FIG. 1;
FIG. 5 is a schematic view of the relationship between the first and second chain scrapers and the chain;
FIG. 6 is a schematic view of a first chain flight;
FIG. 7 is a schematic view of a second chain flight;
FIG. 8 is a schematic view of a flight portion of a second chain flight;
FIG. 9 is a side view of FIG. 8;
FIG. 10 is a schematic view of a second chain flight with a shaft and bushing;
fig. 11 is a top view of fig. 10.
The components in the figure: 1. the chain tensioner comprises a chain tensioner, 2, a chain, 3, a first driven chain wheel, 4, a frame, 5, a second driven chain wheel, 6, a fuel guide plate, 7, a driving chain, 8, a speed reducer, 9, a scraper chain bracket, 10, a travel switch assembly, 11, a first scraper, 12, a frame fixing plate, 13, an end iron plate, 14, a speed reducer chain wheel, 15, a second scraper, 16, a scraper part, 17, a groove, 18, a shaft and 19, and a shaft sleeve.
Detailed Description
The invention is further explained below with reference to the figures and the examples.
The utility model provides a double-chain loading attachment of straw burning boiler, includes chain strainer 1, chain 2, first driven sprocket 3, frame 4, second driven sprocket 5, fuel deflector 6, drive chain 7, speed reducer 8, scraper blade chain bracket 9, travel switch assembly 10, first scraper blade 11, frame fixed plate 12, end iron plate 13, speed reducer sprocket 14, second scraper blade 15.
One end on the frame 4 is equipped with first driven sprocket 3, and the other end is equipped with second driven sprocket 5, and first driven sprocket 3 one side is arranged in outdoors, and second driven sprocket 5 one side is located indoorly, and second driven sprocket 5 below is equipped with speed reducer 8, and speed reducer sprocket 14 drives second driven sprocket 5 through drive chain 7, and second driven sprocket 5 both sides drive first driven sprocket 3 through chain 2. The first scraper 11 and the second scraper 15 are fixed on the two chains 2, and two ends of the second scraper 15 are respectively fixed on the two chains 2 to play a role in limiting. The top of scraper blade 2 is equipped with axle and axle sleeve structure and axle sleeve and is a little higher than scraper blade 1, and the friction of scraper blade and scraper blade chain bracket 9 when such design can reduce the chain and return makes the operation more smooth and noise reduction. The device is provided with two parallel chains 2. The chain scraper corresponding position on the frame 4 is provided with a chain scraper supporting groove 9, the chain scraper supporting groove 9 is a steel plate folding groove, the section is U-shaped, the number of the chain scraper supporting groove is two, the chain 2 is driven in the chain scraper supporting groove 9, and the chain tensioner 1 is arranged on one side of the first driven chain wheel 3. The chain tensioner 1 is of the prior art. 4 both sides welding of frame has fuel deflector 6, fuel deflector 6 is bent for the steel sheet and is made and have the gusset and consolidate, sets up about from frame center slant, and radian and material package outer circular arc are unanimous between two fuel deflectors 6 for control the material package and control the removal just to restrict the material package with the material package normal position, guarantee that the material package correctly impels. The chain 2 is equidistantly and uniformly provided with a first scraper 11 and a second scraper 15, the first scraper 11 is in the shape of an arc with the upper part protruding upwards, the arc deviates to one side, the two sides of the lower part are L-shaped, and the two sides are fixed on chain links of the chain through 4 screws. The second scraper 15 is shown in fig. 7-11, and the top of the scraper is provided with a shaft and a shaft sleeve, and the shaft sleeve is slightly higher than the highest point of the first scraper 11. The two ends of the scraper are respectively fixed on the two chains 2 through 4 screws, and the scraper plays a role in fixing. The top shaft and bushing of the second scraper 15 act to reduce the friction between the scraper and the scraper chain bracket 9, making the chain run smoother and reducing noise. Under the action of the self weight of the material bag, the first scraper 11 and the second scraper 15 are inserted into the material bag for conveying. One side of the second driven chain wheel 5 is provided with a travel switch assembly 10, and the structure of the travel switch assembly 10 is the prior art.
Example 1
Double-chain loading attachment throw material one side setting outside boiler room, the opposite side sets up in boiler room, fuel deflector and frame 4 welded fastening, the tip of throwing material one side on frame 4 is equipped with end iron plate 13 and opens there are two screw holes, two bolts of chain strainer 1 pass two screw holes with nut tightness adjustment chain strainer 1, chain strainer 1 is through fix with screw at frame fixed plate 12, frame fixed plate 12 welds on frame 4. A speed reducer chain wheel 14 is fixed on an output shaft of the speed reducer 8, the speed reducer chain wheel 14 drives a driving chain 7, the driving chain 7 drives a second driven chain wheel 5, the second driven chain wheel 5 drives a chain 2, and the chain 2 drives a driven chain wheel 1. Both sides syntropy is equipped with fuel deflector 6 for hold up and right the fuel, does not drop to both sides, and chain 2 places on scraper chain holds in the palm groove 10, and scraper chain holds in the palm groove 10 and frame welded fastening for the restriction holds up scraper chain, and the last first fixed scraper blade 11 of bolt and second scraper blade 15 of being interrupted of chain 2, the scraper blade blocks that straw fuel conveys forward.
Claims (9)
1. The utility model provides a double-chain loading attachment of straw burning boiler which characterized in that: the device comprises a transmission device, the transmission device comprises a chain (2), a first driven chain wheel (3) and a second driven chain wheel (5), two chains (2) are arranged between the first driven chain wheel (3) and the second driven chain wheel (5), the second driven chain wheel (5) is connected with a speed reducer chain wheel (14) of a speed reducer (8) through a driving chain (7), the transmission device is arranged on a frame (4), fuel guide plates (6) are arranged on two sides of the frame (4), a first scraper plate (11) is arranged on the chain (2), and a second scraper plate (15) is arranged between the two chains (2).
2. The double-chain feeding device of the straw combustion boiler as claimed in claim 1, wherein: one side of the first driven chain wheel (3) is arranged outdoors, and one side of the second driven chain wheel (5) is arranged indoors.
3. The double-chain feeding device of the straw combustion boiler as claimed in claim 1, wherein: one side of the first driven chain wheel (3) is provided with a chain tensioner (1).
4. The double-chain feeding device of the straw combustion boiler as claimed in claim 1, wherein: the fuel guide plates (6) are provided with reinforcing rib plates, the fuel guide plates (6) are obliquely arranged from the center of the frame to the left and right, and the radian between the two fuel guide plates (6) is consistent with that of the outer arc of the round-wrapped straw.
5. The double-chain feeding device of the straw combustion boiler as claimed in claim 1, wherein: and a travel switch assembly (10) is arranged on one side of the second driven chain wheel (5).
6. The double-chain feeding device of the straw combustion boiler as claimed in claim 1, wherein: a scraper chain bracket (9) is arranged below the chain (2).
7. The double-chain feeding device of the straw combustion boiler as claimed in claim 1, wherein: first scraper blade (11) equidistance sets up on every chain (2), second scraper blade (15) equidistance sets up between two chains (2), first scraper blade (11), second scraper blade (15) interval cross arrangement.
8. The double-chain feeding device of the straw combustion boiler as claimed in claim 7, wherein: the upper portion of the first scraper (11) is arc-shaped and protrudes upwards, grooves are formed in two sides of the upper portion of the second scraper (15), and a shaft (18) and a shaft sleeve (19) are arranged in each groove.
9. The double-chain feeding device of the straw combustion boiler as claimed in claim 8, wherein: the top end shaft sleeve of the second scraper (15) is higher than the top of the first scraper (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010262725.3A CN111252470A (en) | 2020-04-07 | 2020-04-07 | Double-chain feeding device of straw combustion boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010262725.3A CN111252470A (en) | 2020-04-07 | 2020-04-07 | Double-chain feeding device of straw combustion boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111252470A true CN111252470A (en) | 2020-06-09 |
Family
ID=70950016
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010262725.3A Pending CN111252470A (en) | 2020-04-07 | 2020-04-07 | Double-chain feeding device of straw combustion boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111252470A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116692369A (en) * | 2023-07-28 | 2023-09-05 | 太原旭宁科技有限公司 | Coal separation conveyer |
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|---|---|---|---|---|
| CN101362552A (en) * | 2007-08-10 | 2009-02-11 | 三一重型装备有限公司 | Support scratch board for conveying equipment of coal mine work area |
| CN201909325U (en) * | 2010-12-20 | 2011-07-27 | 王培臣 | Heavy type scratch board slag remover for boiler |
| CN202754452U (en) * | 2012-08-10 | 2013-02-27 | 上海市机电设计研究院有限公司 | Idler wheel type plate link chain coal slag conveyor |
| CN203699173U (en) * | 2013-12-17 | 2014-07-09 | 陈巍巍 | Scraper conveyor |
| CN203857470U (en) * | 2014-04-10 | 2014-10-01 | 江西弘泰电子信息材料有限公司 | Chain-plate type boiler slag remover with adjustable scraper chains |
| CN106219164A (en) * | 2016-09-12 | 2016-12-14 | 周杰 | A kind of drag conveyor |
| CN205998538U (en) * | 2016-08-31 | 2017-03-08 | 张文学 | A kind of chain device of carbide slag scrapper conveyor |
| CN109533793A (en) * | 2018-12-27 | 2019-03-29 | 铁岭众缘环保设备制造有限公司 | A kind of longitudinal feeding device of straw burning boiler |
| CN211997442U (en) * | 2020-04-07 | 2020-11-24 | 铁岭众缘环保设备制造有限公司 | Double-chain feeding device of straw combustion boiler |
-
2020
- 2020-04-07 CN CN202010262725.3A patent/CN111252470A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101362552A (en) * | 2007-08-10 | 2009-02-11 | 三一重型装备有限公司 | Support scratch board for conveying equipment of coal mine work area |
| CN201909325U (en) * | 2010-12-20 | 2011-07-27 | 王培臣 | Heavy type scratch board slag remover for boiler |
| CN202754452U (en) * | 2012-08-10 | 2013-02-27 | 上海市机电设计研究院有限公司 | Idler wheel type plate link chain coal slag conveyor |
| CN203699173U (en) * | 2013-12-17 | 2014-07-09 | 陈巍巍 | Scraper conveyor |
| CN203857470U (en) * | 2014-04-10 | 2014-10-01 | 江西弘泰电子信息材料有限公司 | Chain-plate type boiler slag remover with adjustable scraper chains |
| CN205998538U (en) * | 2016-08-31 | 2017-03-08 | 张文学 | A kind of chain device of carbide slag scrapper conveyor |
| CN106219164A (en) * | 2016-09-12 | 2016-12-14 | 周杰 | A kind of drag conveyor |
| CN109533793A (en) * | 2018-12-27 | 2019-03-29 | 铁岭众缘环保设备制造有限公司 | A kind of longitudinal feeding device of straw burning boiler |
| CN211997442U (en) * | 2020-04-07 | 2020-11-24 | 铁岭众缘环保设备制造有限公司 | Double-chain feeding device of straw combustion boiler |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116692369A (en) * | 2023-07-28 | 2023-09-05 | 太原旭宁科技有限公司 | Coal separation conveyer |
| CN116692369B (en) * | 2023-07-28 | 2023-10-27 | 太原旭宁科技有限公司 | Coal separation conveyer |
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Address after: 110000 Xin Tai Zi Zhen Xin Tai Bao Cun, Tieling County, Tieling City, Liaoning Province Applicant after: Liaoning Zhongyuan Energy Saving Boiler Co.,Ltd. Address before: 110000 Xintai Road, high tech Industrial Development Zone, Tieling City, Liaoning Province Applicant before: TIELING ZHONGYUAN ENVIRONMENTAL PROTECTION EQUIPMENT MANUFACTURING CO.,LTD. |