CN202924745U - Washing and dewatering device for white carbon black synthetic fluid - Google Patents
Washing and dewatering device for white carbon black synthetic fluid Download PDFInfo
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- CN202924745U CN202924745U CN 201220621094 CN201220621094U CN202924745U CN 202924745 U CN202924745 U CN 202924745U CN 201220621094 CN201220621094 CN 201220621094 CN 201220621094 U CN201220621094 U CN 201220621094U CN 202924745 U CN202924745 U CN 202924745U
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Abstract
The utility model provides a washing and dewatering device for white carbon black synthetic fluid. The washing and dewatering device comprises a solid-liquid separator, a water washing tank, a cross-flow type membrane filter, a concentrated slurry storage tank and a plurality of pipelines, wherein a synthetic fluid inlet and a mother liquor outlet are arranged on the solid-liquid separator, and multiple groups of filter membranes are arranged in the solid-liquid separator; a white carbon black slurry material outlet is arranged at the bottom of the solid-liquid separator, and the solid-liquid separator is connected with the water washing tank; a stirrer is arranged in the water washing tank, a white carbon black slurry material inlet is arranged at the top of the water washing tank, a washed material outlet is arranged at the bottom of the water washing tank, and the washed material outlet is connected with the cross-flow type membrane filter; and multiple groups of concentration filter membranes are arranged in the cross-flow type membrane filter, a white carbon black concentrated slurry outlet is arranged at the top of the cross-flow type membrane filter, and the white carbon black concentrated slurry outlet is respectively connected with the water washing tank and the concentrated slurry storage tank through a three-way pipeline. The washing and dewatering device provided by the utility model can completely wash, dewater and concentrate the white carbon black synthetic fluid, simultaneously reduce water consumption and obtain white carbon black products with different sodium sulfate contents and various specifications.
Description
Technical field
The utility model belongs to the Chemical Manufacture equipment technical field, is specifically related to the washing/dehydrating device of the synthetic liquid of a kind of white carbon black.
Background technology
White carbon black has another name called hydrated SiO 2, and present conventional production method mainly contains vapor phase process and the precipitator method.Wherein, white carbon black mainly is used as strengthening agent, coating and insatiable hunger, resin thickening material, natural rubber and elastomeric strengthening agent, the toothpaste abrasives etc. of silicon rubber.
China's precipitator method production technique be mainly adopt take sulfuric acid and water glass as raw material production, the synthetic liquid of the white carbon black that obtains after reaction is the mixed system of silicon-dioxide, sodium sulfate and water.Therefore, also need after reaction is completed to synthetic liquid wash, press filtration, making beating and spraying drying, just can obtain qualified white carbon black product.The synthetic liquid washing process of traditional white carbon black is to complete washing, pressure-filtering process by the employing pressure filter, and this technique water loss is large, washing is incomplete.
The utility model content
The utility model solved the available technology adopting pressure filter to the synthetic liquid of white carbon black wash, press filtration exist water loss large, wash incomplete technical problem, a kind of washing/dehydrating device of the new synthetic liquid of white carbon black is provided.
The technical solution of the utility model is:
The washing/dehydrating device of the synthetic liquid of a kind of white carbon black is characterized in that, described washing/dehydrating device comprises solid-liquid separator, water washing tank, cross-flow type membrane filtration device, underflow material storage tank and is connected for the pipeline that connects;
Described solid-liquid separator is provided with synthetic liquid entrance and mother liquor outlet, is provided with some groups of filtering membranes in described solid-liquid separator, and described filtering membrane is between synthetic liquid entrance and mother liquor outlet; The bottom of described solid-liquid separator is provided with the outlet of white carbon black slurries material, and described white carbon black slurries material outlet is connected with water washing tank by the first pipeline;
Be provided with agitator in described water washing tank; The water washing tank bottom is provided with washing material outlet and rinse liquid outlet, and the top is provided with white carbon black slurries material entrance and washings entrance; The washing material outlet of water washing tank is connected with the cross-flow type membrane filtration device by second pipe; One end of described second pipe is connected with the outlet of the washing material of water washing tank, and the other end of second pipe is connected with the material inlet of cross-flow type membrane filtration device; Described second pipe is provided with pump, thief hole and clear water entrance;
Be provided with some groups of thickening filtration films in described cross-flow type membrane filtration device; Cross-flow type membrane filtration device bottom is provided with material inlet, water outlet and cleaning liquid inlet; The top is provided with the concentrated slurry outlet of white carbon black, and the concentrated slurry outlet of white carbon black is connected with water washing tank by the 3rd pipeline, and the concentrated slurry outlet of white carbon black is connected with underflow material storage tank by the 5th pipeline.
As further improvement of the utility model, an end of described the first pipeline is connected with the white carbon black slurries material outlet of solid-liquid separator, and the other end of the first pipeline is connected with the slurries material entrance of water washing tank; Described the first pipeline is provided with bleeder valve.
As further improvement of the utility model, the front end of described synthetic liquid entrance is provided with feed valve, and the mother liquor exit is provided with bleeder valve.
As further improvement of the utility model, described synthetic liquid entrance is positioned at below filtering membrane, and the mother liquor outlet is positioned at above filtering membrane.
As further improvement of the utility model, described solid-liquid separator bottom is taper, and the outlet of white carbon black slurries material is positioned at conical lower portion; The top of described solid-liquid separator also is provided with back blow port, and the front end of back blow port also is provided with valve.
As further improvement of the utility model, the concentrated slurry outlet of the white carbon black at described cross-flow type membrane filtration device top also is connected with the 3rd pipeline, and the other end of the 3rd pipeline is connected with water washing tank.Described water washing tank top is provided with the second entrance, and the other end of described the 3rd pipeline is connected with the second entrance.
As further improvement of the utility model, also be connected with the 4th pipeline for dredging on described the second entrance, be connected with valve on described the 4th pipeline.The bottom of described cross-flow type membrane filtration device also is provided with the cleaning liquid inlet.
As further improvement of the utility model, in described solid-liquid separator, the quantity of filtering membrane is 20 ~ 50.
As further improvement of the utility model, in described cross-flow type membrane filtration device, the quantity of thickening filtration film is 20 ~ 50.
the washing/dehydrating device that the utility model provides, by first adopting solid-liquid separator to carry out coarse filtration to the synthetic dilute slurry of white carbon black, the water mother liquor that contains sodium sulfate is higher is first discharged, and remaining white carbon black slurries material changes in water washing tank to be washed, and can save the consumption of water in washing process, then dialogue carbon black liquid material is washed in water washing tank, the washing water consumption can be according in product, the requirement of sodium sulfate different content being regulated, then the material after washing changes in the cross-flow type membrane filtration device and concentrates, the concentrated slurry of the white carbon black that obtains after concentrated enters water washing tank again, and in slurry concentrated according to this, content and water-content in white carbon black underflow material of sodium sulfate carries out circulation cleaning and concentrated, when the content of sodium sulfate in this concentrated slurry and water-content reach technic index, namely should be designated as qualified white carbon black underflow material by concentrated slurry, can put into underflow material storage tank this moment with this qualified white carbon black underflow material, and enter into dehumidification system from the bottom discharge of underflow material storage tank.The washing/dehydrating device that the utility model provides can effectively reduce the water consumption, and obtains the white carbon black product of the different all size of sodium sulphate content.
Description of drawings
The white carbon black that Fig. 1 provides for the utility model synthesizes the structural representation of the washing/dehydrating device of liquid.
In figure: 100---solid-liquid separator, 200---water washing tank, 300---the cross-flow type membrane filtration device, 400---underflow material storage tank; 1---the first pipeline, 2---second pipe, 3---the 3rd pipeline, 4---the 4th pipeline, 5---the 5th pipeline; 10---filtering membrane, 11---synthetic liquid entrance, 12---the mother liquor outlet, 13---the outlet of white carbon black slurries material, 14---bleeder valve, 15---back blow port; 20---agitator, 21---white carbon black slurries material entrance, 22---the washings entrance, 23---the washing material outlet, 24---the second entrance, 25---rinse liquid outlet, 26---pump, 27---the clear water entrance, 28---thief hole; 30---the thickening filtration film, 31---material inlet, 32---the water outlet, 33---white carbon black concentrates slurry outlet, and 34---the cleaning liquid inlet, 35---underflow material baiting valve.
Embodiment
Clearer for technical problem, technical scheme and beneficial effect that the utility model is solved, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
The utility model provides the washing/dehydrating device of the synthetic liquid of a kind of white carbon black, as shown in Figure 1, comprises solid-liquid separator 100, water washing tank 200, cross-flow type membrane filtration device 300, underflow material storage tank 400 and is connected for the pipeline that connects.
Wherein, solid-liquid separator 100 is provided with synthetic liquid entrance 11 and mother liquor outlet 12, is provided with some groups of filtering membranes 10 in described solid-liquid separator 100, and described filtering membrane 10 is between synthetic liquid entrance 11 and mother liquor outlet 12.Particularly, synthetic liquid entrance 11 is positioned at filtering membrane 10 belows, and mother liquor outlet 12 is positioned at filtering membrane 10 tops.The bottom of solid-liquid separator 100 is provided with white carbon black slurries material outlet 13, and water washing tank 200 tops are provided with white carbon black slurries material entrance 21.Be connected by the first pipeline 1 between the white carbon black slurries material entrance 21 of white carbon black slurries material outlet 13 and water washing tank 200.
Filtering membrane 10 is used for the synthetic dilute slurry of white carbon black is carried out coarse filtration, also contains the process of natural subsidence.In the utility model, in described solid-liquid separator 100, the quantity of filtering membrane 10 can be 20 ~ 50.After filtration, obtain the water mother liquor of contains sodium sulfate, it is discharged from mother liquor outlet 12; The white carbon black slurries material that obtains enters through the first pipeline 1 from white carbon black slurries material outlet 13 and carries out next process water washing tank 200.
As shown in Figure 1, the first pipeline 1 is provided with bleeder valve 14.The front end of synthetic liquid entrance 11 also can be provided with feed valve, and mother liquor exports 12 places and is provided with bleeder valve.Therefore, first open the feed valve of synthetic liquid entrance 11 front ends and the bleeder valve that mother liquor exports 12 places, close the bleeder valve 14 on the first pipeline 1, the synthetic liquid of white carbon black is sent in solid-liquid separator 100, carry out solid-liquid separation by filtering membrane 10, after separation was completed, the pass was closed into the feed valve of liquid entrance 11 front ends and the bleeder valve that mother liquor exports 12 places, open bleeder valve 14 and back blow port valve on the first pipeline 1, the white carbon black slurries material that obtains after separating is entered in water washing tank 200 by the first pipeline 1.For guaranteeing that the white carbon black slurries material after separation enters in water washing tank 200 fast, as a kind of preferred implementation of the present utility model, the top of described solid-liquid separator also is provided with back blow port 15.More preferably in situation, the front end of back blow port 15 also can be provided with valve.
For convenience of sedimentation and the gathering of white carbon black in the synthetic liquid of white carbon black, under preferable case, described solid-liquid separator 100 bottoms are taper, and white carbon black slurries material outlet 13 is positioned at conical lower portion.
Be provided with agitator 20 in water washing tank 200, water washing tank 200 tops are provided with washings entrance 22; Pass into washings (for example hot water) by this washings entrance 22, and stir the mixed system of the interior washings of water washing tank 200 and white carbon black slurries material by agitator 20, thereby dialogue carbon black liquid material is fully washed.Water washing tank 200 bottoms are provided with washing material outlet 23 and rinse liquid outlet 25, and the bottom of cross-flow type membrane filtration device 300 is provided with material inlet 31.Be connected by second pipe 2 between material outlet 23 and material inlet 31.Material after washing is completed enters through second pipe 2 from material outlet 23 and carries out next process in cross-flow type membrane filtration device 300.Enter in cross-flow type membrane filtration device 300 for convenience of the material after washing, second pipe 2 is provided with pump 26, clear water entrance 27 and thief hole 28, and wherein clear water entrance 27 is positioned at the rear end of pump 26, and thief hole 28 is positioned at the front end of pump 26.Be equipped with corresponding valve on clear water entrance 27 and thief hole 28.Thief hole 28 is used for the content of the white carbon black thickened pulp sodium sulfate after sampling detection dehydration and whether the water-content of underflow material reaches the technology controlling and process index.
In the utility model, described washing/dehydrating device can be realized cyclical operation.Particularly, the concentrated slurry of white carbon black that reaches the product requirement index is qualified white carbon black underflow material, it can enter underflow material storage tank 400 by the 5th pipeline 5, and sends into next process by this underflow material storage tank 400, thereby produces qualified white carbon black product.The concentrated slurry of white carbon black that does not reach the product requirement index is proceeded circulation cleaning and concentrated.
Be provided with some groups of thickening filtration films 30 in cross-flow type membrane filtration device 300, this thickening filtration film 30 is used for material is carried out dewatering and filtering, to obtain the concentrated slurry of white carbon black.In described cross-flow type membrane filtration device 300, the quantity of thickening filtration film 30 can be 20 ~ 50.
As shown in Figure 1, cross-flow type membrane filtration device 300 bottoms are provided with water outlet 32, and the top is provided with the concentrated slurry outlet 33 of white carbon black.After material dewatering filtered, the sodium sulfate water that obtains was discharged from water outlet 32, and the concentrated slurry of white carbon black is from concentrated slurry outlet 33 outputs of this white carbon black.
As shown in Figure 1, is connected with water washing tank 200 by the 3rd pipeline 3 at the concentrated slurry outlet 33 of the white carbon black at cross-flow type membrane filtration device 300 tops, simultaneously, white carbon black concentrates slurry outlet 33 also to be passed through the 5th pipeline 5 and is connected with underflow material storage tank 400.Particularly, the concentrated slurry outlet 33 of white carbon black can be connected with the 5th pipeline 5 with the 3rd pipeline 3 by a three-way interface simultaneously, and water washing tank 200 tops are provided with the second entrance 24, the other end of the 3rd pipeline 3 is connected with the second entrance 24, and the other end of the 5th pipeline 5 is connected with underflow material storage tank 400.The 3rd pipeline 3 is provided with valve, and this valve is positioned at the front end of the second entrance 24.Also be provided with valve on the 5th pipeline 5, be underflow material baiting valve 35, as shown in Figure 1.
Can send back to through the 3rd pipeline 3 from the concentrated slurry outlet 33 of white carbon black through the concentrated slurry of white carbon black after dehydration and carry out the circulation cleaning dehydration water washing tank 200, the concentrated slurry of white carbon black that does not namely reach technic index can export 33 from white carbon black and send back to water washing tank 200 through the 3rd pipeline 3, proceed washing, and then carry out thickening filtration through cross-flow type membrane filtration device 300, until the technic index value in concentrated slurry reaches the technology controlling and process index, to obtain qualified white carbon black underflow material.The concentrated slurry (being qualified white carbon black underflow material) of white carbon black that reaches technic index enters underflow material storage tank 400 by the 5th pipeline 5, and sends into next process by this underflow material storage tank 400, to produce qualified white carbon black product.
As another kind of preferred implementation of the present utility model, also be connected with the 4th pipeline 4, the four pipelines 4 on the second entrance 24 of water washing tank 200 for being used for the subsidiary conduit of dredging pipeline.
As another kind of preferred implementation of the present utility model, the bottom of cross-flow type membrane filtration device 300 also is provided with cleaning liquid inlet 34, and its effect is that cross-flow type membrane filtration device 300 and thickening filtration film 30 are cleaned.
The principle of work of the washing/dehydrating device that the utility model provides is:
First close the bleeder valve 14 of solid-liquid separator 100 bottoms, open the feed valve of synthetic liquid entrance 11 front ends of solid-liquid separator 100 and the bleeder valve at mother liquor outlet 12 places, (flow velocity is 17m approximately with the pressure of 0.5MPa with the synthetic dilute slurry of white carbon black
3/ h) enter in solid-liquid separator 100 from synthetic liquid entrance 11, carry out solid-liquid separation by filtering membrane 10, the water mother liquor of the contains sodium sulfate after separation is discharged from mother liquor outlet 12.when synthetic liquid feed rate descends rapidly, slurries are filled it up with, the pass is closed into the feed valve of liquid entrance 11 front ends and the bleeder valve that mother liquor exports 12 places, open bleeder valve 14 and back blow port valve on the first pipeline 1, the slurries material that contains white carbon black after separating is entered in water washing tank 200 through the first pipeline 1 evenly, and sodium sulphate content in sampling analysis white carbon black slurries material, while turn on agitator 20, at the uniform velocity pass into hot wash-water in washings entrance 22, in the sodium sulphate content data that the consumption of hot water obtains according to sampling analysis and required underflow material, the cubage of sodium sulfate obtains, wash in water washing tank 200, after the hot water dosage is completed, agitator treating carried out dewatering and filtering through second pipe 2 sending the material in water washing tank 200 in cross-flow type membrane filtration device 300 at the uniform velocity by thickening filtration film 30 with pump 26 after 15 minutes again, and carry out cyclical operation by the 3rd pipeline 3.If in the concentrated slurry of the white carbon black after dehydration, the content of sodium sulfate and the water-content of underflow material reach the technology controlling and process index, be qualified white carbon black underflow material this moment, close the valve on the 3rd pipeline 3, open the underflow material baiting valve 35 on the 5th pipeline 5, qualified white carbon black underflow material is sent into underflow material storage tank 400, and send drying process by the outlet at bottom of this underflow material storage tank 400.In the underflow material is sent into the process of underflow material storage tank 400, when the material liquid level of water washing tank 200 is put down the position of washing material outlet 23, close underflow material baiting valve 35 on the 5th pipeline 5 and the pump 26 on second pipe 2, open the valve of clear water entrance 27 front ends on second pipe 2 and the valve on the 3rd pipeline 3, close the valve at water outlet 32 places, material in cross-flow type membrane filtration device 300 is cleaned in water washing tank 200, after the second entrance 24 goes out clear liquid, close the valve of clear water entrance 27 front ends, prepare to carry out the operation of next round.If in the concentrated slurry of the white carbon black after dehydration, the content of sodium sulfate is higher, the concentrated slurry of this white carbon black is sent back in water washing tank 200 through the 3rd pipeline 3 and again wash, then change over to and carry out again thickening in cross-flow type membrane filtration device 300, repetitive operation is until in the concentrated slurry of the white carbon black after dehydration, the content of sodium sulfate reaches the product requirement index; Therefore, can obtain the white carbon black product of the different all size of sodium sulphate content.The sodium sulfate water that obtains after dewatering and filtering is discharged by the water outlet 32 of bottom, and it can send into preparing tank as the auxiliary agent of building-up reactions.
Above embodiment is only preferred implementation of the present utility model, should be pointed out that to those skilled in the art, and under the prerequisite that does not break away from the utility model principle, some improvement of having done also should be considered as protection domain of the present utility model.
Claims (9)
1. the washing/dehydrating device of the synthetic liquid of white carbon black, is characterized in that, described washing/dehydrating device comprises solid-liquid separator, water washing tank, cross-flow type membrane filtration device, underflow material storage tank and is connected for the pipeline that connects;
Described solid-liquid separator is provided with synthetic liquid entrance and mother liquor outlet, is provided with some groups of filtering membranes in described solid-liquid separator, and described filtering membrane is between synthetic liquid entrance and mother liquor outlet; The bottom of described solid-liquid separator is provided with the outlet of white carbon black slurries material, and described white carbon black slurries material outlet is connected with water washing tank by the first pipeline;
Be provided with agitator in described water washing tank; The water washing tank bottom is provided with washing material outlet and rinse liquid outlet, and the top is provided with white carbon black slurries material entrance and washings entrance; The washing material outlet of water washing tank is connected with the cross-flow type membrane filtration device by second pipe; One end of described second pipe is connected with the outlet of the washing material of water washing tank, and the other end of second pipe is connected with the material inlet of cross-flow type membrane filtration device; Described second pipe is provided with pump, thief hole and clear water entrance;
Be provided with some groups of thickening filtration films in described cross-flow type membrane filtration device; Cross-flow type membrane filtration device bottom is provided with material inlet, water outlet and cleaning liquid inlet; The top is provided with the concentrated slurry outlet of white carbon black, and the concentrated slurry outlet of white carbon black is connected with water washing tank by the 3rd pipeline, and the concentrated slurry outlet of white carbon black is connected with underflow material storage tank by the 5th pipeline.
2. washing/dehydrating device according to claim 1, is characterized in that, an end of described the first pipeline is connected with the white carbon black slurries material outlet of solid-liquid separator, and the other end of the first pipeline is connected with the slurries material entrance of water washing tank; Described the first pipeline is provided with bleeder valve.
3. washing/dehydrating device according to claim 1 and 2, is characterized in that, the front end of described synthetic liquid entrance is provided with feed valve, and the mother liquor exit is provided with bleeder valve.
4. washing/dehydrating device according to claim 1, is characterized in that, described synthetic liquid entrance is positioned at below filtering membrane, and the mother liquor outlet is positioned at above filtering membrane.
5. washing/dehydrating device according to claim 1, is characterized in that, described solid-liquid separator bottom is taper, and the outlet of white carbon black slurries material is positioned at conical lower portion; The top of described solid-liquid separator also is provided with back blow port, and the front end of back blow port also is provided with valve.
6. washing/dehydrating device according to claim 1, is characterized in that, the concentrated slurry outlet of the white carbon black at described cross-flow type membrane filtration device top also is connected with the 3rd pipeline, and the other end of the 3rd pipeline is connected with water washing tank;
Described water washing tank top is provided with the second entrance, and the other end of described the 3rd pipeline is connected with the second entrance.
7. washing/dehydrating device according to claim 6, is characterized in that, also is connected with the 4th pipeline for dredging on described the second entrance, is connected with valve on described the 4th pipeline;
The bottom of described cross-flow type membrane filtration device also is provided with the cleaning liquid inlet.
8. washing/dehydrating device according to claim 1, is characterized in that, in described solid-liquid separator, the quantity of filtering membrane is 20 ~ 50.
9. washing/dehydrating device according to claim 1, is characterized in that, in described cross-flow type membrane filtration device, the quantity of thickening filtration film is 20 ~ 50.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220621094 CN202924745U (en) | 2012-11-22 | 2012-11-22 | Washing and dewatering device for white carbon black synthetic fluid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220621094 CN202924745U (en) | 2012-11-22 | 2012-11-22 | Washing and dewatering device for white carbon black synthetic fluid |
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| Publication Number | Publication Date |
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| CN202924745U true CN202924745U (en) | 2013-05-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220621094 Expired - Lifetime CN202924745U (en) | 2012-11-22 | 2012-11-22 | Washing and dewatering device for white carbon black synthetic fluid |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102910636A (en) * | 2012-11-22 | 2013-02-06 | 株洲兴隆化工实业有限公司 | Cleaning and dewatering device for white carbon black synthetic fluid |
| CN109187109A (en) * | 2018-10-12 | 2019-01-11 | 安徽兴锂新能源有限公司 | A kind of solvent dehydration/purificasystem system and its application method with novel sampling device |
-
2012
- 2012-11-22 CN CN 201220621094 patent/CN202924745U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102910636A (en) * | 2012-11-22 | 2013-02-06 | 株洲兴隆化工实业有限公司 | Cleaning and dewatering device for white carbon black synthetic fluid |
| CN102910636B (en) * | 2012-11-22 | 2014-04-09 | 株洲兴隆化工实业有限公司 | Cleaning and dewatering device for white carbon black synthetic fluid |
| CN109187109A (en) * | 2018-10-12 | 2019-01-11 | 安徽兴锂新能源有限公司 | A kind of solvent dehydration/purificasystem system and its application method with novel sampling device |
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| C56 | Change in the name or address of the patentee |
Owner name: ZHUZHOU XINGLONG NEW MATERIALS CO., LTD. Free format text: FORMER NAME: ZHUZHOU XINGLONG CHEMICAL INDUSTRY CO., LTD. |
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| CP03 | Change of name, title or address |
Address after: 412006 Zhuzhou City, Hunan province leading Shifeng District Town Industrial Area Patentee after: ZHUZHOU XINGLONG NEW MATERIAL CO.,LTD. Address before: Zhuzhou City, Hunan province 412006 Shifeng District leading town Patentee before: ZHUZHOU XINGLONG CHEMICAL INDUSTRIAL Co.,Ltd. |
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Granted publication date: 20130508 |
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