CN113145411A - Temperature regulation and control device - Google Patents
Temperature regulation and control device Download PDFInfo
- Publication number
- CN113145411A CN113145411A CN202110450459.1A CN202110450459A CN113145411A CN 113145411 A CN113145411 A CN 113145411A CN 202110450459 A CN202110450459 A CN 202110450459A CN 113145411 A CN113145411 A CN 113145411A
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- temperature
- pipe
- temperature regulating
- regulating
- temperature control
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
- B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
- B05C11/1042—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material provided with means for heating or cooling the liquid or other fluent material in the supplying means upstream of the applying apparatus
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Control Of Temperature (AREA)
Abstract
The invention relates to the technical field of lithium battery processing and manufacturing, in particular to a temperature regulating device which comprises an external temperature regulating pipe and an internal temperature regulating part, wherein one end of the external temperature regulating pipe is provided with a feeding hole, and the other end of the external temperature regulating pipe is provided with a discharging hole; the inner temperature adjusting part is inserted into the outer temperature adjusting pipe, one end of the inner temperature adjusting part is provided with a supporting head, the supporting head is embedded into the outer temperature adjusting pipe, and a gap communicated with the feeding hole and the discharging hole is formed between the outer temperature adjusting pipe and the inner temperature adjusting part. The basic principle of the invention is that the fluid slurry is extruded to flow along the thin layer of the cylindrical surface through the narrow gap between the external temperature regulating pipe and the internal temperature regulating piece, and the heat transfer and heat conduction efficiency of the thin liquid layer is higher. And then according to actual requirements, the temperature is regulated and controlled through cooling or heating.
Description
Technical Field
The invention relates to the technical field of lithium battery processing and manufacturing, in particular to a temperature regulating and controlling device.
Background
At present, in the lithium battery manufacturing industry, the processing and production of pole pieces mainly use a precisely controlled extrusion coating die head, but the temperature of slurry changes due to the change of environmental temperature, so that the stability of extrusion coating is greatly influenced. This is primarily because the viscosity of the slurry changes with temperature, which in turn affects the flow of the slurry through the coating die cavity and ultimately the quality of the coating applied.
On the coating production line of pole piece, lack a temperature regulation and control device and regulate and control the temperature of thick liquids in real time, and then control thick liquids viscosity and coordinate the regulation of whole areal density.
Disclosure of Invention
The invention aims to provide a temperature regulating device which controls the adjustment of the viscosity of slurry and the overall surface density by increasing and decreasing the temperature.
In order to achieve the purpose, the technical scheme adopted by the invention is to provide a temperature regulating device which comprises an external temperature regulating pipe and an internal temperature regulating part, wherein one end of the external temperature regulating pipe is provided with a feeding hole, and the other end of the external temperature regulating pipe is provided with a discharging hole; the inner temperature adjusting part is inserted into the outer temperature adjusting pipe, one end of the inner temperature adjusting part is provided with a supporting head, the supporting head is embedded into the outer temperature adjusting pipe, and a gap communicated with the feeding hole and the discharging hole is formed between the outer temperature adjusting pipe and the inner temperature adjusting part.
Furthermore, the external temperature regulating pipe comprises an inner-layer spacer bush and an outer-layer temperature regulating medium circulating pipe, the gap is formed between the spacer bush and the internal temperature regulating part, one end of the side wall of the temperature regulating medium circulating pipe is provided with a temperature regulating medium inlet, and the other end of the side wall of the temperature regulating medium circulating pipe is provided with a temperature regulating medium outlet.
Furthermore, the temperature regulating medium circulating pipe is provided with a flow guide channel which is communicated with the temperature regulating medium inlet and the temperature regulating medium outlet, and the flow guide channel is spirally and annularly arranged in the temperature regulating medium circulating pipe.
Further, the flow direction of the temperature regulating medium is arranged opposite to the flow direction of the slurry.
Furthermore, the other end of the internal temperature regulating part is provided with a fixed tailstock, and the fixed tailstock is embedded into the external temperature regulating pipe.
Furthermore, through holes for slurry to flow are formed in the supporting head and the fixed tailstock.
Further, the end of the inner temperature control member near the feed port end is tapered to facilitate flow diversion.
Further, the internal temperature regulating part comprises a regulating source and a mounting pipe, the mounting pipe wraps the regulating source, and the gap is formed between the mounting pipe and the external temperature regulating pipe.
Further, still include temperature sensor, outside thermoregulation pipe with inside thermoregulation spare detects through temperature sensor's cooperation realizes the regulation and control of temperature.
And further, the temperature regulating device also comprises flange joints, wherein the flange joints are arranged at two ends of the external temperature regulating pipe.
The invention has the beneficial effects that:
1. the basic principle of the invention is that the fluid slurry is extruded to flow along the thin layer of the cylindrical surface through the narrow gap between the external temperature regulating pipe and the internal temperature regulating piece, and the heat transfer and heat conduction efficiency of the thin liquid layer is higher. And then according to actual requirements, the temperature is regulated and controlled through cooling or heating.
2. One end of the side wall of the temperature regulating medium circulating pipe is provided with a temperature regulating medium inlet, the other end of the side wall of the temperature regulating medium circulating pipe is provided with a temperature regulating medium outlet, a cooled medium is generally introduced into the temperature regulating medium circulating pipe to play a role in cooling, and a heated medium can be introduced into the temperature regulating medium circulating pipe to raise the temperature according to actual requirements, so that the temperature of the slurry is regulated.
3. The diversion channel is spirally and annularly arranged in the temperature regulating medium circulating pipe, so that the temperature regulating medium is fully contacted with the temperature regulating medium circulating pipe, more cold or heat of the temperature regulating medium is favorably radiated into the gap, and the temperature of the slurry in the gap is regulated.
4. The flowing direction of the temperature regulating medium and the flowing direction of the slurry are arranged in a reverse direction, so that the slurry in the flowing process is fully contacted with the temperature regulating medium, more cold or heat of the temperature regulating medium is conveniently radiated into the slurry, and the temperature regulation of the slurry is realized.
5. The internal temperature regulating part comprises a regulating source and a mounting pipe, the mounting pipe covers the regulating source, and a gap is formed between the mounting pipe and the external temperature regulating pipe. The adjusting source is generally an electric device, and the mounting tube covers the adjusting source, so that the direct contact between the adjusting source and liquid is isolated, and the damage to the adjusting source is avoided. The adjusting source can be used for cooling and heating and is used for adjusting and controlling the temperature of the slurry.
6. The flange joint is mainly convenient for the whole temperature control device to be quickly disassembled and assembled in the slurry production line. The flange joints are installed at the two ends of the external temperature regulating pipe, so that the series connection of a plurality of temperature regulating devices can be realized, and the external temperature regulating pipe is suitable for different slurry conveying systems.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic perspective view of a temperature control device according to an embodiment of the present invention;
FIG. 2 is a side view of a temperature regulation device provided in an embodiment of the present invention;
FIG. 3 is a sectional view taken along line A-A of FIG. 2;
FIG. 4 is a sectional view taken along line B-B of FIG. 2;
fig. 5 is a schematic perspective view of an internal temperature adjustment component used in a temperature control device according to an embodiment of the present invention;
fig. 6 is a schematic perspective view of an external temperature adjustment pipe used in a temperature control device according to an embodiment of the present invention.
Description of reference numerals:
1. an external temperature regulating tube; 11. a feed inlet; 12. a discharge port; 13. a spacer sleeve; 14. a temperature regulating medium circulating pipe; 141. a temperature regulating medium inlet; 142. a temperature regulating medium outlet; 143. a flow guide channel; 2. an internal temperature regulating member; 21. a support head; 22. fixing the tailstock; 23. adjusting a source; 231. sealing the plug; 24. installing a pipe; 3. and (4) a flange joint.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Referring to fig. 1 to 6, a temperature control apparatus provided as an embodiment of the present invention includes an external temperature control pipe 1 and an internal temperature control member 2, wherein one end of the external temperature control pipe 1 is provided with a feed port 11, and the other end is provided with a discharge port 12; the internal temperature adjusting piece 2 is inserted into the external temperature adjusting pipe 1, one end of the internal temperature adjusting piece is provided with a supporting head 21, the supporting head 21 is embedded into the external temperature adjusting pipe 1, and a gap for communicating the feeding hole 11 with the discharging hole 12 is formed between the external temperature adjusting pipe 1 and the internal temperature adjusting piece 2. The basic principle of the invention is that fluid slurry is extruded to flow along a thin layer of a cylindrical surface through a narrow gap between an external temperature regulating pipe 1 and an internal temperature regulating part 2, and the heat transfer and heat conduction efficiency of the thin liquid layer is higher. And then according to actual requirements, the temperature is regulated and controlled through cooling or heating.
Specifically, the external temperature regulating pipe 1 includes an inner spacer 13 and an outer temperature regulating medium circulation pipe 14, one end of the side wall of the temperature regulating medium circulation pipe 14 is provided with a temperature regulating medium inlet 141, and the other end is provided with a temperature regulating medium outlet 142. The internal temperature regulating part 2 comprises a regulating source 23 and a mounting pipe 24, the mounting pipe 24 covers the regulating source 23, the regulating source 23 is generally an electric device, the mounting pipe 24 covers the regulating source 23, the regulating source 23 is isolated from being in direct contact with liquid, and damage to the regulating source 23 is avoided. The adjusting source 23 can be used for both cooling and heating, and is used for adjusting and controlling the temperature of the slurry. One end of the installation tube 24 is sleeved with a support head 21, the support head 21 is embedded into the spacer 13, and a gap is formed between the spacer 13 and the installation tube 24 through the arranged support head 21. One end of the side wall of the temperature regulating medium circulation pipe 14 is provided with a temperature regulating medium inlet 141, and the other end is provided with a temperature regulating medium outlet 142, wherein a cooled medium is generally introduced to perform the cooling function, and of course, the heated medium can be introduced to perform temperature rise according to actual requirements, so as to realize temperature regulation of the slurry. When the temperature of the slurry is lower, the slurry enters from the feeding hole 11 and is heated and warmed up through the adjusting source 23, at the moment, a heated medium is introduced into the temperature adjusting medium circulating pipe 14, and the adjusting source 23 is assisted to heat and warm up, so that the temperature of the slurry is quickly raised, and the processing requirement is met. When the thick liquids temperature is higher, the thick liquids carry out refrigeration cooling through adjusting source 23 after getting into from feed inlet 11, let in microthermal medium in the medium circulation pipe 14 that adjusts the temperature this moment, supplementary adjusting source 23 cools down for thick liquids rapid cooling satisfies the processing demand.
As a variable embodiment, the temperature adjusting medium circulating pipe 14 and the adjusting source 23 can also be independently used to realize the temperature adjustment of the slurry. Or a medium with the temperature opposite to that of the adjusting source 23 is introduced into the temperature adjusting medium circulation pipe 14, that is, when the adjusting source 23 is heated, the temperature is not controlled to cause the temperature of the slurry to be too high, and at the moment, a low-temperature medium is introduced into the temperature adjusting medium circulation pipe 14 to cool the slurry. When the adjusting source 23 is used for refrigerating, the temperature of the slurry is too low due to the fact that the temperature is not well controlled, and at the moment, a high-temperature medium is introduced into the temperature adjusting medium circulating pipe 14 to heat the slurry.
Furthermore, the temperature regulating medium circulation pipe 14 is provided with a flow guide channel 143 which is communicated with the temperature regulating medium inlet 141 and the temperature regulating medium outlet 142, and the flow guide channel 143 is spirally and annularly arranged inside the temperature regulating medium circulation pipe 14, so that the temperature regulating medium is fully contacted with the temperature regulating medium circulation pipe 14, more cold or heat of the temperature regulating medium is favorably radiated into the gap, and the temperature of the slurry in the gap is regulated.
Further, the flow direction of the temperature regulating medium is arranged opposite to the flow direction of the slurry. The slurry in the flowing process is fully contacted with the temperature adjusting medium, so that more cold or heat of the temperature adjusting medium is conveniently radiated into the slurry, and the temperature adjustment of the slurry is realized.
Furthermore, the other end of the internal temperature adjusting member 2 is provided with a fixed tailstock 22, and the fixed tailstock 22 is embedded in the external temperature adjusting pipe 1. The end of the inner temperature control member 2 near the feed opening 11 end is tapered to facilitate flow diversion.
Specifically, an opening is formed at one end of the installation tube 24 for the adjustment source 23 to be inserted and installed, and the opening is sealed by the sealing plug 231 after installation. The fixed cover of 24 one ends of installation pipe is equipped with supports head 21, and the fixed cover in 24 other ends of installation pipe is equipped with fixed tailstock 22, supports head 21 and fixed tailstock 22 and all imbeds and installs in spacer 13, supports all to be equipped with the through-hole that supplies the thick liquids circulation on head 21 and the fixed tailstock 22. The installation pipe 24 is installed by arranging two supporting parts, so that a gap for communicating the feeding hole 11 with the discharging hole 12 is formed between the installation pipe 24 and the spacer 13. The end of the mounting pipe 24 close to the end of the feed inlet 11 is tapered, so that the slurry can be conveniently divided, and the slurry can rapidly enter a narrow gap to form a cylindrical thin liquid layer.
Further, the temperature regulation and control device further comprises a temperature sensor and a control module, the external temperature regulation pipe 1 and the internal temperature regulation part 2 are detected through the matching of the temperature sensor and fed back to the control module, and the automatic regulation and control of the temperature are realized through the control module.
Further, the temperature regulation and control device further comprises a flange joint 3, and the flange joints 3 are arranged at the two ends of the external temperature regulation pipe 1. The flange joint 3 is mainly convenient for the whole temperature control device to be quickly disassembled and assembled in the slurry production line. The flange joints 3 are installed at the two ends of the external temperature regulating pipe 1, and the serial connection and connection of a plurality of temperature regulating devices can be realized to adapt to different slurry conveying systems.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (10)
1. A temperature regulating device, comprising:
the temperature adjusting device comprises an external temperature adjusting pipe (1), wherein one end of the external temperature adjusting pipe is provided with a feeding hole (11), and the other end of the external temperature adjusting pipe is provided with a discharging hole (12);
the inner temperature adjusting piece (2) is inserted into the outer temperature adjusting pipe (1), one end of the inner temperature adjusting piece is provided with a supporting head (21), the supporting head (21) is embedded into the outer temperature adjusting pipe (1), and a gap communicated with the feeding hole (11) and the discharging hole (12) is formed between the outer temperature adjusting pipe (1) and the inner temperature adjusting piece (2).
2. The temperature control device according to claim 1, characterized in that the outer temperature control tube (1) comprises an inner spacer (13) and an outer temperature control medium circulation tube (14), the gap is formed between the spacer (13) and the inner temperature control member (2), one end of the side wall of the temperature control medium circulation tube (14) is provided with a temperature control medium inlet (141), and the other end is provided with a temperature control medium outlet (142).
3. The temperature control device according to claim 2, characterized in that the temperature control medium circulation pipe (14) is provided with a flow guide channel (143) for communicating the temperature control medium inlet (141) and the temperature control medium outlet (142), and the flow guide channel (143) is spirally arranged inside the temperature control medium circulation pipe (14).
4. A temperature conditioning arrangement according to claim 3, wherein the flow direction of the temperature conditioning medium is arranged opposite to the flow direction of the pulp.
5. Temperature regulating device according to any one of claims 1 to 4, characterized in that the other end of the inner temperature regulating element (2) is provided with a fixed tailstock (22), said fixed tailstock (22) being embedded in the outer temperature regulating tube (1).
6. The temperature control device according to claim 5, wherein the support head (21) and the fixed tailstock (22) are provided with through holes for slurry to flow through.
7. Temperature conditioning device according to any of claims 1 to 4, characterized in that the end of the inner temperature regulating member (2) near the end of the inlet opening (11) is provided with a conical shape facilitating the flow division.
8. Temperature regulating device according to any one of claims 1 to 4, characterized in that the inner temperature regulating member (2) comprises a regulating source (23) and a mounting tube (24), the mounting tube (24) enveloping the regulating source (23), the mounting tube (24) forming the gap with the outer temperature regulating tube (1).
9. The temperature regulating device according to any one of claims 1 to 4, further comprising a temperature sensor, wherein the outer temperature regulating pipe (1) and the inner temperature regulating member (2) realize temperature regulation by cooperative detection of the temperature sensor.
10. Temperature regulating device according to any one of claims 1-4, characterized in that it further comprises a flange joint (3), and that both ends of the outer temperature regulating pipe (1) are provided with flange joints (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110450459.1A CN113145411A (en) | 2021-04-25 | 2021-04-25 | Temperature regulation and control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110450459.1A CN113145411A (en) | 2021-04-25 | 2021-04-25 | Temperature regulation and control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113145411A true CN113145411A (en) | 2021-07-23 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110450459.1A Pending CN113145411A (en) | 2021-04-25 | 2021-04-25 | Temperature regulation and control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113145411A (en) |
Citations (9)
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|---|---|---|---|---|
| US4667852A (en) * | 1983-09-29 | 1987-05-26 | Bernd Siemann | Apparatus for preparing and dispensing thermoplastic resin |
| JPH09210577A (en) * | 1995-11-30 | 1997-08-12 | Komatsu Ltd | Controlling equipment of temperature of fluid |
| CN101266117A (en) * | 2003-12-10 | 2008-09-17 | 松下电器产业株式会社 | Heat exchanger and washing apparatus comprising the same |
| CN203525713U (en) * | 2013-11-04 | 2014-04-09 | 保定中药制药有限公司 | Device used for esterification reaction during drug preparation process |
| CN104226207A (en) * | 2014-08-28 | 2014-12-24 | 沈阳化工大学 | Double-side cooling concentric tube-in-tube type sulfonating reactor |
| CN104437987A (en) * | 2013-09-16 | 2015-03-25 | 诺信公司 | Heat exchange device, liquid adhesive system, and related method |
| CN207271547U (en) * | 2017-09-15 | 2018-04-27 | 烟台环孚汽车设备有限公司 | Fluid sealant coating system with accurate temperature control |
| CN109807033A (en) * | 2019-01-30 | 2019-05-28 | 苏州鸿绪信息科技有限公司 | A kind of slurry transport temperature control equipment |
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-
2021
- 2021-04-25 CN CN202110450459.1A patent/CN113145411A/en active Pending
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| US4667852A (en) * | 1983-09-29 | 1987-05-26 | Bernd Siemann | Apparatus for preparing and dispensing thermoplastic resin |
| JPH09210577A (en) * | 1995-11-30 | 1997-08-12 | Komatsu Ltd | Controlling equipment of temperature of fluid |
| CN101266117A (en) * | 2003-12-10 | 2008-09-17 | 松下电器产业株式会社 | Heat exchanger and washing apparatus comprising the same |
| CN104437987A (en) * | 2013-09-16 | 2015-03-25 | 诺信公司 | Heat exchange device, liquid adhesive system, and related method |
| CN203525713U (en) * | 2013-11-04 | 2014-04-09 | 保定中药制药有限公司 | Device used for esterification reaction during drug preparation process |
| CN104226207A (en) * | 2014-08-28 | 2014-12-24 | 沈阳化工大学 | Double-side cooling concentric tube-in-tube type sulfonating reactor |
| CN207271547U (en) * | 2017-09-15 | 2018-04-27 | 烟台环孚汽车设备有限公司 | Fluid sealant coating system with accurate temperature control |
| CN109807033A (en) * | 2019-01-30 | 2019-05-28 | 苏州鸿绪信息科技有限公司 | A kind of slurry transport temperature control equipment |
| CN212819055U (en) * | 2020-06-03 | 2021-03-30 | 河北绿缘环保科技有限公司 | Be applied to spray gun of cement kiln SNCR denitration |
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