CN104176505A - Slurry pipeline conveying system and conveying switching method for long-distance online combined pipeline - Google Patents
Slurry pipeline conveying system and conveying switching method for long-distance online combined pipeline Download PDFInfo
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- CN104176505A CN104176505A CN201410387052.9A CN201410387052A CN104176505A CN 104176505 A CN104176505 A CN 104176505A CN 201410387052 A CN201410387052 A CN 201410387052A CN 104176505 A CN104176505 A CN 104176505A
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Abstract
The invention provides a slurry pipeline conveying system and conveying switching method for long-distance online combined pipelines. The technical scheme is as follows: a slurry pipeline and a water returning pipeline of a mine lot are connected on a slurry conveying main pipeline of the slurry pipeline system, and innovative combined valves are switched for conveying, so that existing slurry conveying pipelines are effectively used to realize the conveying of mineral resources of new mine lots along the main pipeline, and the mining slurry conveying efficiency of the pipeline system is greatly improved; in addition, the water returning pipeline is created, so that water resources are used repeatedly, not only is the problem that the new mine lots are lack of water solved, but also the cost that cleaning water is conveyed to a terminal station by the main pipeline is greatly lowered, the use ratio of the slurry pipeline is improved to the uttermost, the water resources are effectively saved, and the slurry pipeline conveying system and conveying switching method are enabled to have important popularizing and utilizing value.
Description
Technical field
The present invention relates to Technology of Slurry Pipeline Delivery field, relate to more specifically a kind of distance Slurry Pipeline Transportation system and slurry online and pipe grown and carry changing method.
Background technology
At China's fast increasing economy, particularly metallurgical in recent years, petrochemical industry, oil, the sustainable and stable development of the industries such as chemical fertilizer, along with the price of the energy promotes, traffic cost is more and more higher, and utilize hydraulic pipe conveying solid substance material, transport (as railway with other, highway) to compare and have: transportation range is short, landform is adapted to and can utilize discrepancy in elevation potential energy, do not account for or account for less soil, free from environmental pollution and not disturbed by external condition, can realize continuous working, technology is reliable, working expenses is only railway, the plurality of advantages such as 1/6～1/10 of highway, realize economy, environment sustainable development.But the larger defect that Slurry Pipeline Transportation system has is that cost of investment is higher, in reality because mineral resources are distributed in multiple different regions, these mineral resources all effectively to be used by pipeline transportation, just need to build specially pipeline system for each mine, cause the significantly lifting of mineral resources traffic cost, especially can make pipeline carry overall cost performance greatly to reduce for the slurry pipeline of the long distance of some small-sized mines layings, such as the Yunnan's pipeline being constructed and put into operation for 2006, the pipeline of long 171 kilometers is transported to Kunming Iron and Steel Works's Yuxi dehydrating plant, along with company constantly develops, jade and stockaded village 20 kilometers of original Near Pipelines exploit the small mines making new advances, because the small mines output of new exploitation is little, if a newly-built pipeline from Yu Hezhai small mines to Kunming Iron and Steel Works's Yuxi dehydrating plant, high cost, pipeline mileage reaches 90 kilometers, if can utilize original ready-made pipeline by actv., can save the pipe-line construction of 70 kilometers, pipeline that only need to be from small mines to newly-built one 20 kilometers, existing pipeline, therefore how to make each mine website of long-distance slurry delivery duct approach utilize this long-distance slurry pipeline to carry out the conveying of mineral resources by actv., for reducing Slurry Pipeline Transportation cost, improve slurry pipeline conveying efficiency significant, and in prior art, do not provide this resource by near each mine website long-distance pipe carry out and manage carry scheme.
Summary of the invention
The present invention is based on above-mentioned prior art problem, a kind of distance Slurry Pipeline Transportation system and slurry online and pipe grown of proposition of innovation carried changing method, described slurry pipeline system is by carrying on main pipeline and access mining area slurry pipeline and return pipe road, mining area at slurry, and utilize each innovative combination valve to carry switching, thereby actv. utilizes existing slurry to carry main pipeline to realize the conveying near main pipeline each new mining area mineral resources along the line, greatly improve the pulp conveying efficiency of plumbing system, reuse as the water resource of the maximum innovation of the present invention simultaneously, not only solve the problem of new mining area production lack of water, and greatly reduce main pipeline rinse water be transported to the cost in terminal station, improve to greatest extent slurry pipeline degree of utilization, and actv. has been saved water resource, make Slurry Pipeline Transportation system of the present invention and slurry thereof switch carrying method and there is important popularizing value.
It is as follows that the present invention solves the problems of the technologies described above taked technical scheme:
A kind of online also Slurry Pipeline Transportation system of pipe of distance of growing, comprise slurry conveying main pipeline 3, mining area slurry pipeline 5, return pipe road, mining area 6, reflux line 7, the first switch valve 8, supervisor's switch valve 9, the second switch valve 10, the 3rd switch valve 11, the first hydrometer 12 and the second hydrometer 13, the one end in described mining area slurry pipeline 5 and return pipe road, mining area 6 is communicated in described slurry and carries main pipeline 3, between described mining area slurry pipeline 5 and return pipe road, mining area 6, be connected with described reflux line 7, described supervisor's switch valve 9 is arranged at described slurry and carries on main pipeline 3, and described supervisor's switch valve 9 carries main pipeline 3 to connect the position between mining area slurry pipeline 5 and return pipe road, mining area 6 at described slurry, described the 3rd switch valve 11 is arranged on described reflux line 7, described the first switch valve 8 is arranged on described mining area slurry pipeline 5, and described the first switch valve 8 connects the position between reflux line 7 and slurry conveying main pipeline 3 at described mining area slurry pipeline 5, described the second switch valve 10 is arranged on return pipe road, described mining area 6, and described the second switch valve 10 connects reflux line 7 in return pipe road, described mining area 6 and slurry is carried the position between main pipeline 3, described the first hydrometer 12 is arranged at described slurry and carries on main pipeline 3, described the second hydrometer 13 is arranged on described mining area slurry pipeline 5.
Further according to Slurry Pipeline Transportation system of the present invention, wherein said slurry carries the input end of main pipeline 3 to be connected in upstream pumping unit 1, mouth is connected in terminal dehydrating station 2, the other end in described mining area slurry pipeline 5 and return pipe road, mining area 6 is connected in and manages mining area 4, described and manage mining area 4 and be greater than distance described and that manage mining area 4 and carry main pipeline 3 to slurry to the distance of terminal dehydrating station 2.
Further, according to Slurry Pipeline Transportation system of the present invention, wherein said reflux line 7 is carrying the position of main pipeline 3 to be communicated with described mining area slurry pipeline 5 and return pipe road, mining area 6 near slurry.
Further, according to Slurry Pipeline Transportation system of the present invention, wherein said the first hydrometer 12 is arranged at slurry and carries the upstream near return pipe road, mining area 6 connection locations on main pipeline 3.
Further, according to Slurry Pipeline Transportation system of the present invention, wherein said the second hydrometer 13 is arranged at the upstream near reflux line 7 connection locations on mining area slurry pipeline 5.
The slurry that carries out based on Slurry Pipeline Transportation system of the present invention is carried a changing method, comprising following steps:
Step 1, supervisor switch valve 9 in open mode, the first switch valve 8 and the second switch valve 10 under closed condition, utilize slurry carry main pipeline 3 will be delivered to terminal dehydrating station 2 from the slurry of upstream pumping unit 1;
Step 2, when need to by and manage resource in mining area 4 while being delivered to terminal dehydrating station 2, control upstream pumping unit 1 and carry main pipeline 3 to switch to slurry to carry sparge waters, pay close attention to the reading of the first hydrometer 12 simultaneously;
When step 3, the slurry concentration recording when described the first hydrometer 12 are reduced to below the first switching threshold, open and manage the pumping plant in mining area 4 and utilize mining area slurry pipeline 5 to carry out slurry conveying, and open the 3rd switch valve 11, pay close attention to the reading of the second hydrometer 13 simultaneously;
Step 4, the slurry concentration recording when described the second hydrometer 13 are increased to the second switching threshold when above, close supervisor's switch valve 9 and the 3rd switch valve 11, and open the first switch valve 8 and the second switch valve 10 simultaneously, carry the sparge water in main pipeline 3 to switch in input return pipe road, mining area 6 slurry, slurry in mining area slurry pipeline 5 is switched to input slurry and carry in main pipeline 3, the switching that has completed slurry is carried.
Further carry changing method according to slurry of the present invention, wherein also comprise:
Step 5, when and manage mining area 4 when completing its resource and carrying, provide sparge water to mining area slurry pipeline 5, and the slurry concentration recording when the second hydrometer 13 is while being reduced to below the first switching threshold, close the first switch valve 8, open the 3rd switch valve 11 and stop and managing the pumping plant in mining area, open supervisor's switch valve 9 simultaneously, close the second switch valve 10, again control upstream pumping unit 1 and carry main pipeline 3 to switch slurry body to slurry.
Further carry changing method, the slurry concentration that wherein said the first switching threshold is 10%, the slurry concentration that described the second switching threshold is 15% according to slurry of the present invention.
Further carry changing method according to slurry of the present invention, wherein in step 4, when and while managing mining area 4 not in needs moisturizing, stop upstream pumping unit 1 and close the second switch valve 10.
At least can reach following technique effect by technical scheme of the present invention:
1), slurry pipeline system of the present invention is by carrying on main pipeline and access mining area slurry pipeline and return pipe road, mining area at slurry, and utilize each innovative combination valve to carry switching, thereby actv. utilizes existing slurry to carry main pipeline to realize the conveying near main pipeline each new mining area mineral resources along the line, the pulp conveying efficiency of plumbing system and the resource utilization in new mining area are greatly improved.
2), being provided with return pipe road and returning water method of Slurry Pipeline Transportation system innovation of the present invention, realize the recycling of water resource in slurry pipeline, efficiently solve the problem of new mining area production lack of water simultaneously, and greatly reduce main pipeline rinse water be transported to the cost in terminal station, improve to greatest extent slurry pipeline degree of utilization, and actv. saved water resource, make Slurry Pipeline Transportation system of the present invention and slurry thereof switch carrying method and there is important popularizing value.
3), Slurry Pipeline Transportation system of the present invention easily realizes, cost is lower, blocked operation is easy simultaneously, the Multifarious minerals resource that can be applicable to multiple regions is carried, market outlook are wide.
Brief description of the drawings
Accompanying drawing 1 is the online also integral structure schematic diagram of the Slurry Pipeline Transportation system of pipe of long distance of the present invention.
In figure, the implication of each Reference numeral is as follows:
1-upstream pumping unit, 2-terminal dehydrating station, 3-slurry is carried main pipeline, 4-also manages mining area, 5-mining area slurry pipeline, return pipe road, 6-mining area, 7-reflux line, 8-the first switch valve, 9-is responsible for switch valve, 10-the second switch valve, 11-the 3rd switch valve, 12-the first hydrometer, 13-the second hydrometer.
Detailed description of the invention
Below in conjunction with accompanying drawing, technical scheme of the present invention is described in detail, so that those skilled in the art can more clearly understand the present invention, but does not therefore limit the scope of the invention.
As shown in Figure 1, long distance of the present invention Slurry Pipeline Transportation entire system online and pipe comprises slurry conveying main pipeline 3, mining area slurry pipeline 5, return pipe road, mining area 6, reflux line 7, the first switch valve 8, supervisor's switch valve 9, the second switch valve 10, the 3rd switch valve 11, the first hydrometer 12 and the second hydrometer 13, wherein said slurry carries the slurry input end of main pipeline 3 to be connected in upstream pumping unit 1, slurry mouth is connected in terminal dehydrating station 2, described slurry carries main pipeline 3 for the existing long-distance pipe of having laid, carrying the nearer position (within 30 kilometers) of main pipeline to have a small-sized mining area apart from slurry, this small-sized mining area as and manage mining area 4 to utilize slurry carry main pipeline 3 carry out the conveying of mineral resources, the application innovation and manage mining area 4 and slurry and carry construction between main pipeline 3 to have two parallel pipelines, be mining area slurry pipeline 5 and return pipe road, mining area 6, these two pipelines incite somebody to action and manage mining area 4 and slurry and carry main pipeline 3 to be communicated with, mining area slurry pipeline 5 wherein for to and manage mineral products in mining area 4 and be delivered to slurry in ore pulp mode and carry in main pipeline 3, return pipe road, mining area 6 is wherein for carrying slurry the cleaning in main pipeline 3 to push away water extraction confession extremely and manage mining area 4, and fill a vacancy and manage the water of productive use in mining area, and the pulp-water of the mining area slurry pipeline 5 interior conveyings that simultaneously reflux.Described mining area slurry pipeline 5 and return pipe road, mining area 6 with and manage mining area and carry main pipeline nearest mode to be communicated in slurry to carry apart from slurry simultaneously the sidewall of main pipeline, and described slurry carries main pipeline between mining area slurry pipeline 5 and 6, return pipe road, mining area connecting portion, to be provided with supervisor's switch valve 9, described mining area slurry pipeline 5 and return pipe road, mining area 6 are communicated with by reflux line 7 each other, concrete described reflux line 7 is arranged at the position of carrying main pipeline 3 near slurry, on described reflux line 7, be provided with the 3rd switch valve 11, described mining area slurry pipeline 5 is provided with the first switch valve 8 in the part connecting between reflux line 7 and slurry conveying main pipeline 3 simultaneously, return pipe road, described mining area 6 is provided with the second switch valve 10 in the part connecting between reflux line 7 and slurry conveying main pipeline 3.Carry on main pipeline 3 and be provided with the first hydrometer 12 at described slurry, described the first hydrometer 12 arranges near the connection location upstream in return pipe road, mining area 6 simultaneously, on described mining area slurry pipeline 5, be provided with the second hydrometer 13, described the second hydrometer 13 arranges near the connection location upstream of reflux line 7, described hydrometer is for detection of the slurry body concentration in pipeline, thereby can judge that what in pipeline, carry is slurry or water.By described hydrometer and switch valve control and manage mining area and slurry is carried pulp-water between main pipeline to switch to carry.
Below to having carried out slurry and managed and carry changing method to describe by length distance of the present invention Slurry Pipeline Transportation system online and pipe.First the basic process of Slurry Pipeline Transportation is described, the pumping pressure that provides slurry to carry by pumping plant, slurry is carried until slurry is transported to terminal dehydrating station and is carried out processed in pipeline, complete after the slurry of a batch is carried and need pipeline cleaning, now in pipeline transport cleaning water to terminal.Slurry Pipeline Transportation changing method of the present invention comprises the following steps:
One, first ensure that supervisor's switch valve 9 is in open mode, the first switch valve 8 and the second switch valve 10 are in closed condition simultaneously, utilize slurry to carry main pipeline 3 to transport slurry from upstream pumping unit 1 to terminal dehydrating station 2, mining area slurry pipeline 5, in water-filling state in the time not using, can select to close the 3rd switch valve 11 if desired simultaneously.
Two, when need to by and manage mineral resources in mining area 4 while being delivered to terminal dehydrating station 2, carry main pipeline 3 to switch input sparge waters at upstream pumping unit 1 to slurry, in slurry is carried main pipeline, carry out water and push away slurry and carry, and pay close attention to the reading of the first hydrometer 12.
Three, in the time that in the pipe that the first hydrometer 12 records, slurry concentration is reduced to below 10%, illustrate that the rinse water in slurry conveying main pipeline has arrived and managed the pipeline connection location in mining area 4, now open and manage the pumping plant in mining area, utilize mining area slurry pipeline 5 to carry the ore pulp in mining area, and open the 3rd switch valve 11, slurry utilizes slurry to push away water effect and the water in mining area slurry pipeline 5 is returned to water and manages mining area 4 through reflux line 7 and return pipe road, mining area 6 reuses in the time of the interior conveying of mining area slurry pipeline 5, pays close attention to the reading of the second hydrometer 13 simultaneously.
Four, when slurry concentration in the mining area slurry pipeline that the second hydrometer 13 records is increased to 15% when above, the ore pulp slurry that illustrates from and manage mining area has been transported to and has approached mining area slurry pipeline near slurry is carried the exit position on main pipeline, now close supervisor's switch valve 9 and the 3rd switch valve 11, open the first switch valve 8 and the second switch valve 10 simultaneously, make slurry carry the rinse water in main pipeline 3 to flow into return pipe road, mining area 6, and be back to and manage mining area 4 by return pipe road, mining area 6, supplement and manage the water of productive use in mining area with actv., flow into smoothly slurry from the ore pulp slurry in mining area slurry pipeline 5 simultaneously and carry main pipeline 3, and carry main pipeline to carry to terminal dehydrating station 2 by slurry, the mineral resources that completed from and managed mining area utilize slurry to carry the switching of main pipeline to carry.
Five, when and while managing mining area 4 not in needs moisturizing, stop upstream pumping unit 1 and close the second switch valve 10; And manage mining area 4 and carry sparge water to mining area slurry pipeline 5 in the time that its resource will have been carried, when the reading of the second hydrometer 13 is lower than 10% time, close the first switch valve 8, and the main pump of closing and managing mining area, make mining area slurry pipeline 5 again in water-filling state, can select if desired to open the 3rd switch valve 11.Simultaneously in the time again utilizing slurry to carry main pipeline 3 to transport the ore pulp slurry from upstream pumping unit, open supervisor's switch valve 9, and ensure that the first switch valve 8 and the second switch valve 10, in closed condition, start upstream pumping unit simultaneously, again slurry is carried and switched overfall body conveying main pipeline.
In order further to improve Slurry Pipeline Transportation efficiency, can further consider upstream pumping unit and and manage mining area to the Zone switched distance of both pipelines and time difference that wherein slurry is carried, and according to the slurry actual fed time select upstream pumping unit and and manage the opening time of mining area pumping plant and the switching time of each switch valve, such as carrying 4 hours to switch valve place when upstream pumping unit, and from and manage mining area 4 and only need 2 hours to switch valve, operating personal can plan ahead, in above-mentioned steps two and step 3, carry main pipeline 3 to carry sparge water after 2 hours, to select to open and manage the pumping plant in mining area 4 at slurry, mainly can ensure that carry rinse water in main pipeline 3 and the slurry in the slurry pipeline of mining area when slurry arrives position, described switch valve place simultaneously, at this moment switch in the manner described above each valve can be when sparge water enters return pipe road, mining area by from and the slurry of managing mining area be delivered in main pipeline, improve Slurry Pipeline Transportation efficiency.
The invention solves long-distance slurry main pipeline different mines along the line and carry the problem of mineral resources by same main pipeline, efficient utilization Manifold technology have improved the transport efficiency of slurry pipeline, greatly reduce pipeline capital expenditure, that innovates has carried out being cycled to repeat utilization to the sparge water in pipeline handoff procedure simultaneously, not only solve the water of productive use problem in mining area, save water resource, and having reduced the conveying cost to sparge water, entirety has improved slurry pipeline degree of utilization and transport efficiency.
Below be only that the preferred embodiment of the present invention is described; technical scheme of the present invention is not limited to this; the any known distortion that those skilled in the art do on the basis of major technique design of the present invention all belongs to the claimed technology category of the present invention, and the concrete protection domain of the present invention is as the criterion with the record of claims.
Claims (9)
1. the online also Slurry Pipeline Transportation system of pipe of long distance, it is characterized in that, comprise slurry conveying main pipeline (3), mining area slurry pipeline (5), return pipe road, mining area (6), reflux line (7), the first switch valve (8), supervisor's switch valve (9), the second switch valve (10), the 3rd switch valve (11), the first hydrometer (12) and the second hydrometer (13), the one end in described mining area slurry pipeline (5) and return pipe road, mining area (6) is communicated in described slurry and carries main pipeline (3), between described mining area slurry pipeline (5) and return pipe road, mining area (6), be connected with described reflux line (7), described supervisor's switch valve (9) is arranged at described slurry and carries on main pipeline (3), and described supervisor's switch valve (9) is positioned at described slurry and carries main pipeline (3) to connect the position between mining area slurry pipeline (5) and return pipe road, mining area (6), described the 3rd switch valve (11) is arranged on described reflux line (7), described the first switch valve (8) is arranged on described mining area slurry pipeline (5), and described the first switch valve (8) is positioned at, and described mining area slurry pipeline (5) connects reflux line (7) and slurry is carried the position between main pipeline (3), described the second switch valve (10) is arranged on return pipe road, described mining area (6), and described the second switch valve (10) is positioned at, and return pipe road, described mining area (6) connects reflux line (7) and slurry is carried the position between main pipeline (3), described the first hydrometer (12) is arranged at described slurry and carries on main pipeline (3), described the second hydrometer (13) is arranged on described mining area slurry pipeline (5).
2. Slurry Pipeline Transportation system according to claim 1, it is characterized in that, described slurry carries the input end of main pipeline (3) to be connected in upstream pumping unit (1), mouth is connected in terminal dehydrating station (2), the other end in described mining area slurry pipeline (5) and return pipe road, mining area (6) is connected in and manages mining area (4), described and manage mining area (4) to the distance of terminal dehydrating station (2) be greater than described and manage mining area (4) to slurry carry main pipeline (3) distance.
3. Slurry Pipeline Transportation system according to claim 1, is characterized in that, described reflux line (7) is carrying the position of main pipeline (3) to be communicated with described mining area slurry pipeline (5) and return pipe road, mining area (6) near slurry.
4. Slurry Pipeline Transportation system according to claim 1, is characterized in that, described the first hydrometer (12) is arranged at slurry and carries the upper upstream near return pipe road, mining area (6) connection location of main pipeline (3).
5. Slurry Pipeline Transportation system according to claim 1, is characterized in that, described the second hydrometer (13) is arranged at the upper upstream near reflux line (7) connection location of mining area slurry pipeline (5).
6. the slurry carrying out based on Slurry Pipeline Transportation system described in claim 1-5 any one is carried a changing method, it is characterized in that, comprises the following steps:
Step 1, supervisor's switch valve (9) in open mode, the first switch valve (8) and the second switch valve (10) under closed condition, utilize slurry conveying main pipeline (3) to be delivered to terminal dehydrating station (2) from the slurry of upstream pumping unit (1);
Step 2, when needs by and manage resource in mining area (4) while being delivered to terminal dehydrating station (2), control upstream pumping unit (1) and carry main pipeline (3) to switch to slurry to carry sparge water, pay close attention to the reading of the first hydrometer (12) simultaneously;
When step 3, the slurry concentration recording when described the first hydrometer (12) are reduced to below the first switching threshold, open and manage the pumping plant in mining area (4) and utilize mining area slurry pipeline (5) to carry out slurry conveying, and open the 3rd switch valve (11), pay close attention to the reading of the second hydrometer (13) simultaneously;
Step 4, the slurry concentration recording when described the second hydrometer (13) are increased to the second switching threshold when above, close supervisor's switch valve (9) and the 3rd switch valve (11), and open the first switch valve (8) and the second switch valve (10) simultaneously, carry the sparge water in main pipeline (3) to switch in input return pipe road, mining area (6) slurry, slurry in mining area slurry pipeline (5) is switched to input slurry and carry in main pipeline (3), the switching that has completed slurry is carried.
7. slurry according to claim 6 is carried changing method, it is characterized in that, also comprises:
Step 5, when and manage mining area (4) when completing its resource and carrying, provide sparge water to mining area slurry pipeline (5), and the slurry concentration recording when the second hydrometer (13) is while being reduced to below the first switching threshold, close the first switch valve (8), open the 3rd switch valve (11) and stop and managing the pumping plant in mining area, open supervisor's switch valve (9) simultaneously, close the second switch valve (10), again control upstream pumping unit (1) and carry main pipeline (3) to switch slurry body to slurry.
8. carry changing method according to the slurry described in claim 6 or 7, it is characterized in that the slurry concentration that wherein said the first switching threshold is 10%, the slurry concentration that described the second switching threshold is 15%.
9. slurry according to claim 6 is carried changing method, it is characterized in that, wherein in step 4, when and while managing mining area (4) not in needs moisturizing, stop upstream pumping unit (1) and close the second switch valve (10).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410387052.9A CN104176505B (en) | 2014-08-08 | 2014-08-08 | A kind of Slurry Pipeline Transportation system and conveying changing method growing the online also pipe of distance |
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| CN201410387052.9A CN104176505B (en) | 2014-08-08 | 2014-08-08 | A kind of Slurry Pipeline Transportation system and conveying changing method growing the online also pipe of distance |
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| CN104176505A true CN104176505A (en) | 2014-12-03 |
| CN104176505B CN104176505B (en) | 2016-04-06 |
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| CN108954005A (en) * | 2018-09-12 | 2018-12-07 | 阳江核电有限公司 | A kind of multi-channel fluid pipeline reversing service |
| CN110486626A (en) * | 2019-08-26 | 2019-11-22 | 云南大红山管道有限公司 | A kind of long-distance slurry conveying pipeline multi-level pumping plant batch feed device and method |
| CN110714291A (en) * | 2019-11-22 | 2020-01-21 | 无锡东庆染整设备有限公司 | Improved generation dyeing liquid commutator |
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| CN110714291A (en) * | 2019-11-22 | 2020-01-21 | 无锡东庆染整设备有限公司 | Improved generation dyeing liquid commutator |
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| Publication number | Publication date |
|---|---|
| CN104176505B (en) | 2016-04-06 |
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