CN103017193A - Plate type ceramic air preheater - Google Patents
Plate type ceramic air preheater Download PDFInfo
- Publication number
- CN103017193A CN103017193A CN2013100056411A CN201310005641A CN103017193A CN 103017193 A CN103017193 A CN 103017193A CN 2013100056411 A CN2013100056411 A CN 2013100056411A CN 201310005641 A CN201310005641 A CN 201310005641A CN 103017193 A CN103017193 A CN 103017193A
- Authority
- CN
- China
- Prior art keywords
- air preheater
- support member
- ceramic
- fluid
- heat exchanger
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000919 ceramic Substances 0.000 title claims abstract description 67
- 239000012530 fluid Substances 0.000 claims abstract description 24
- 238000007789 sealing Methods 0.000 claims abstract description 11
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 16
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 8
- 229910052593 corundum Inorganic materials 0.000 claims description 8
- 239000010431 corundum Substances 0.000 claims description 8
- 239000002241 glass-ceramic Substances 0.000 claims description 8
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 8
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 8
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 6
- 229910010293 ceramic material Inorganic materials 0.000 claims description 4
- 206010046996 Varicose vein Diseases 0.000 claims description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
- 229920002379 silicone rubber Polymers 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 claims description 2
- 230000001070 adhesive effect Effects 0.000 claims description 2
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 claims description 2
- 230000008676 import Effects 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 description 9
- 230000007797 corrosion Effects 0.000 description 8
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 6
- 239000003546 flue gas Substances 0.000 description 6
- 239000002253 acid Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000001458 anti-acid effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 210000003298 dental enamel Anatomy 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Images
Classifications
-
- 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
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Landscapes
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Air Supply (AREA)
Abstract
The invention belongs to the technical field of heat exchangers and provides a plate type ceramic air preheater. The plate type ceramic air preheater is a cube structure which comprises an upper cover plate (5), a lower baseplate (2) and a vertical column (4), wherein a plurality of heat exchange plates which are arranged up and down are arranged in the plate type ceramic air preheater; a heat exchange plate (6) is a U-shaped ceramic plate; fluid channels are formed between two up-down adjacent heat exchange plates (6), a topmost heat exchange plate (6) and the lower baseplate (2), the upper cover plate (5) and the bottom-most heat exchange plate (6), and two up-down adjacent heat exchange plates (6); the adjacent two fluid channels are vertically arranged; and supporting pieces placed in the two adjacent sealing fluid channels are vertically distributed. By utilizing the plate type ceramic air preheater, the exhaust gas temperature can be reduced to less than 100 DEG C; the energy-saving environment-protection effect is good; afterheat of the exhaust gas is effectively recycled; and due to reduction of the exhaust gas temperature, energy of a heating furnace is fully used, and the efficiency of the heating furnace is greatly improved.
Description
Technical field
The invention belongs to technical field of heat exchangers, be specifically related to a kind of board-like ceramic air preheater.
Background technology
In petrochemical industry, power industry, Industrial Boiler and various heating furnace are main energy consumption equipments, under the environment of global energy-conserving and environment-protective, the efficient that improves Industrial Boiler and heating furnace seems particularly important, the efficient major measure that improves Industrial Boiler and heating furnace is the waste heat in the recovered flue gas, reduces and discharges flue-gas temperature.The maximum difficult point that reclaims at present low-temperature flue gas is the acid dew piont corrosion problem, and the air preheater that common iron is made can lose efficacy because of the acid corrosion problem at short notice.The flue gas low-temperature dew point corrosion is the technological difficulties that restriction reduces the exhaust gas temperature maximum.In order to avoid dew-point temperature, the flue-gas temperature of discharging now arrives about 180 ° of C now, along with riseing of energy rareness and price, is badly in need of a kind of new product that can effectively reduce exhaust gas temperature on the market.
Summary of the invention
In order to overcome the deficiencies in the prior art, the objective of the invention is to propose a kind of board-like ceramic air preheater.
The present invention adopts following technical scheme for finishing above-mentioned purpose:
A kind of board-like ceramic air preheater, the cube structure of described board-like ceramic air preheater for being consisted of by upper cover plate, lower shoe and column; In the board-like ceramic air preheater of cube structure, be provided with a plurality of heat exchanger plates that are arranged above and below; Described heat exchanger plates is the U-shaped ceramic wafer, and this pottery is corundum ceramic or zirconia ceramics or silicon nitride ceramics or silicon carbide ceramics or glass ceramics; Between neighbouring two described heat exchanger plates, between the superiors' heat exchanger plates and the lower shoe, between upper cover plate and the orlop heat exchanger plates and all consist of the fluid passage between neighbouring two described heat exchanger plates, and the mutually wrong 90 ° of settings in adjacent two fluid passages; In each fluid passage, be provided with many rows along transversely arranged support member, and all be pasted with seal in the upper and lower end face of described support member, form and do adjacent mutual wrong 90 a ° fluid-encapsulated passage, adjacent mutual wrong 90 ° fluid-encapsulated passage is respectively zone of heat liberation and cold fluid pass; Be positioned at mutually wrong 90 ° of interlaced arrangement of support member of adjacent two fluid-encapsulated passages.
Have " people " font or serpentine rag on the plate face of described heat exchanger plates.
Described support member is ceramic supporting element, and this pottery is corundum ceramic or zirconia ceramics or silicon nitride ceramics or silicon carbide ceramics or glass ceramics.
Described support member is column, and the cross sectional shape of described support member is oval; Oval-shaped major axis place direction is circulating direction, and most advanced and sophisticated first contacting with fluid is convenient to fluid and is circulated stably, can not form the whirlpool dead band at the lee face of support member, and pressure drop is little.
Import and export at fluid-encapsulated passage all arrange the marginal branch support member, and at described marginal branch support member top and bottom adhesive seal spare.
Described marginal branch support member is ceramic marginal branch support member, and this pottery is corundum ceramic or zirconia ceramics or silicon nitride ceramics or silicon carbide ceramics or glass ceramics.
Described marginal branch support member is the lath-shaped with strip hole.
Described seal is sealing strip or diaphragm seal, and the material of seal is fluorubber, silicon rubber and varicosity PTFE.
Superpose up and down four jiaos of the fluid-encapsulated passage that forms of the described heat exchanger plates of several layers are equipped with column, and the place, post angle of described column arranges L shaped strip seal, thereby reaches the sealing at post angle, prevents the cold and hot fluid short circuit.
Be provided with in order to multi-layer sealed runner is pressed on holding down assembly between upper cover plate and the lower shoe at the two ends of described column; Described holding down assembly comprises double-screw bolt, nut and dish-shaped stage clip; After double-screw bolt passes upper cover plate or lower shoe, load onto dish-shaped stage clip and nut in upper end or the lower end of bolt, screw nut and make upper cover plate and lower shoe apart from minimizing, thereby the heat exchanger plates between holddown plate and the base plate is realized sealing.
A kind of board-like ceramic air preheater that the present invention proposes has adopted described technical scheme, has following beneficial effect:
1, dew-point corrosion resistant can the long-time continuous stable operation
The critical piece heat exchanger plates of a kind of board-like ceramic air preheater that the present invention proposes and support member are all by ceramic making, the corrosion resistance of pottery is strong, it is one of best material of antiacid dew point corrosion, its medium circulation surface spraying anticorrosive paint of the cube that column and upper cover plate, lower shoe form, enamel, resin, or the anti-corrosion materials such as lining rubber slab, tetrafluoro plate, to resist the corrosion of acid dew point, so can online long period continuous and steady operation in the atmosphere of low-temperature flue gas.
2, can large scale make, improve heat exchange area
Because the present invention is module making, so on large-sized pipeline, can be assemblied to form with a plurality of modules, so just increased heat exchange area, improved heat transfer effect, this is that old-fashioned heat exchanger institute is inaccessiable.
3, simple in structure, stable
Though framework of the present invention is rigidity, but all seals all are flexible with holding down assembly, the deformation of pottery heat exchanger plates is very little, thermal stress is little, and owing to be elastic packing between heat exchange plate and the support member, the function of good damping effect and flexible support is arranged, can effectively prevent the brittle break of pottery, improve equipment life, make the long-time running of equipment energy.
4. Mist heat recovering effectively, energy-conserving and environment-protective
Heat exchanger plates of the present invention is ceramic disc, and it has very strong acid resistance, can not be subject to the impact of dew point corrosion, so exhaust gas temperature can be dropped to 100 ° below the C, effects of energy conservation and environmental protection is good, has effectively reclaimed fume afterheat.The reduction of exhaust gas temperature can improve the efficient of heating furnace greatly so that the energy of heating furnace is fully utilized.
Description of drawings
Fig. 1 is structural front view of the present invention.
Fig. 2 is the B-B cutaway view of Fig. 1.
Fig. 3 is the A-A cutaway view of Fig. 1.
Fig. 4 is the front view of heat exchanger plates among the present invention.
Fig. 5 is the top view of Fig. 4.
Fig. 6 is the front view of marginal branch support member among the present invention.
Fig. 7 is the top view of support member among the present invention.
Among the figure: 1, hold down assembly 2, lower shoe, 3, support member, 4, column, 5, upper cover plate, 6, heat exchanger plates, 7, seal, 8, the L-type sealing strip, 9, the marginal branch support member.
The specific embodiment
With specific embodiment the present invention is illustrated by reference to the accompanying drawings:
Such as Fig. 1, shown in Figure 3, a kind of board-like ceramic air preheater, the cube structure of described board-like ceramic air preheater for being consisted of by upper cover plate 5, lower shoe 2 and column 4; In the board-like ceramic air preheater of cube structure, be provided with a plurality of heat exchanger plates that are arranged above and below 6; Described heat exchanger plates 6 is the U-shaped ceramic wafer, and this pottery is corundum ceramic or zirconia ceramics or silicon nitride ceramics or silicon carbide ceramics or glass ceramics; Between neighbouring two described heat exchanger plates 6, between the superiors' heat exchanger plates and the lower shoe 2, between upper cover plate 5 and the orlop heat exchanger plates and all consist of the fluid passage between neighbouring two described heat exchanger plates 6, and the mutually wrong 90 ° of settings in adjacent two fluid passages; In each fluid passage, be provided with many rows along transversely arranged support member 3, and all be pasted with seal 7 in the upper and lower end face of described support member 3, form and do adjacent mutual wrong 90 a ° fluid-encapsulated passage, adjacent mutual wrong 90 ° fluid-encapsulated passage is respectively zone of heat liberation and cold fluid pass; In conjunction with Fig. 2, be positioned at support member 7 mutually wrong 90 ° of interlaced arrangement of adjacent two fluid-encapsulated passages.
In conjunction with Fig. 7, described support member 3 is column, and the cross sectional shape of described support member 3 is oval; Oval-shaped major axis place direction is circulating direction, and most advanced and sophisticated first contacting with fluid is convenient to fluid and is circulated stably, can not form the whirlpool dead band at the lee face of support member, and pressure drop is little.
In conjunction with Fig. 4, Fig. 5, described heat exchanger plates 6 is that U-shaped is tabular, and " people " font rag is arranged on the plate face.
In conjunction with Fig. 6, the material of described marginal branch support member 9 is ceramic material, and described ceramic material is corundum ceramic or zirconia ceramics or silicon nitride ceramics or silicon carbide ceramics or glass ceramics.
In conjunction with Fig. 6, described marginal branch support member 9 is the lath-shaped with strip hole.
Described seal 7 is sealing strip or diaphragm seal, and seal is fluorubber, silicon rubber and varicosity PTFE.
Superpose up and down four jiaos of the fluid-encapsulated passage that forms of several described heat exchanger plates are equipped with column 4, and the place, post angle of described column 4 arranges L shaped strip seal, thereby reaches the sealing at post angle, prevents the cold and hot fluid short circuit.
Be provided with at the two ends of described column 4 in order to multi-layer sealed runner is pressed on and hold down assembly 1 between upper cover plate and the lower shoe; Described holding down assembly 1 comprises double-screw bolt, nut and dish-shaped stage clip; After double-screw bolt passes upper cover plate or lower shoe, load onto dish-shaped stage clip and nut in upper end or the lower end of bolt, screw nut and make upper cover plate and lower shoe apart from minimizing, thereby the heat exchanger plates between holddown plate and the base plate is realized sealing.
Claims (8)
1. board-like ceramic air preheater, described board-like ceramic air preheater are the cube structure that is made of upper cover plate (5), lower shoe (2) and column (4); In the board-like ceramic air preheater of cube structure, be provided with a plurality of heat exchanger plates that are arranged above and below (6); It is characterized in that: described heat exchanger plates (6) is the U-shaped ceramic wafer, and this pottery is corundum ceramic or zirconia ceramics or silicon nitride ceramics or silicon carbide ceramics or glass ceramics; Between neighbouring two described heat exchanger plates (6), between the superiors' heat exchanger plates (6) and the lower shoe (2), between upper cover plate (5) and the orlop heat exchanger plates (6) and all consist of the fluid passage between neighbouring two described heat exchanger plates (6), and the mutually wrong 90 ° of settings in adjacent two fluid passages; In each fluid passage, be provided with many rows along transversely arranged support member (3), and all be pasted with seal (7) in the upper and lower end face of described support member (3), form and do adjacent mutual wrong 90 a ° fluid-encapsulated passage, adjacent mutual wrong 90 ° fluid-encapsulated passage is respectively zone of heat liberation and cold fluid pass; Be positioned at mutually wrong 90 ° of interlaced arrangement of support member of adjacent two fluid-encapsulated passages.
2. a kind of board-like ceramic air preheater according to claim 1 is characterized in that: have " people " font or serpentine rag on the plate face of described heat exchanger plates (6).
3. a kind of board-like ceramic air preheater according to claim 1, it is characterized in that: the material of described support member (3) is ceramic material, described ceramic material is corundum ceramic or zirconia ceramics or silicon nitride ceramics or silicon carbide ceramics or glass ceramics.
4. a kind of board-like ceramic air preheater according to claim 1 is characterized in that: described support member (3) is column, and the cross sectional shape of described support member be ellipse; Oval-shaped major axis place direction is circulating direction, and most advanced and sophisticated first contacting with fluid is convenient to fluid and is circulated stably, can not form the whirlpool dead band at the lee face of support member, and pressure drop is little.
5. a kind of board-like ceramic air preheater according to claim 1, it is characterized in that: the import and export at fluid-encapsulated passage all arrange marginal branch support member (9), and described marginal branch support member (9) is the lath-shaped with strip hole; At described marginal branch support member (9) top and bottom adhesive seal spares (7), described marginal branch support member (9) is ceramic marginal branch support member, and this pottery is corundum ceramic or zirconia ceramics or silicon nitride ceramics or silicon carbide ceramics or glass ceramics.
6. a kind of board-like ceramic air preheater according to claim 1, it is characterized in that: described seal (7) is sealing strip or diaphragm seal, and the material of seal (7) is fluorubber, silicon rubber and varicosity PTFE.
7. a kind of board-like ceramic air preheater according to claim 1, it is characterized in that: superpose up and down four jiaos of the fluid-encapsulated passage that forms of the described heat exchanger plates of several layers are equipped with column, the place, post angle of described column arranges L shaped strip seal, thereby reach the sealing at post angle, prevent the cold and hot fluid short circuit.
8. a kind of board-like ceramic air preheater according to claim 1 is characterized in that: be provided with at the two ends of described column in order to multi-layer sealed runner is pressed on holding down assembly between upper cover plate and the lower shoe (1); Described holding down assembly (1) comprises double-screw bolt, nut and dish-shaped stage clip; After double-screw bolt passes upper cover plate or lower shoe, load onto dish-shaped stage clip and nut in upper end or the lower end of bolt, screw nut and make upper cover plate and lower shoe apart from minimizing, thereby the heat exchanger plates between holddown plate and the base plate is realized sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310005641.1A CN103017193B (en) | 2013-01-08 | 2013-01-08 | A kind of plate type ceramic air preheater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310005641.1A CN103017193B (en) | 2013-01-08 | 2013-01-08 | A kind of plate type ceramic air preheater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103017193A true CN103017193A (en) | 2013-04-03 |
| CN103017193B CN103017193B (en) | 2016-01-20 |
Family
ID=47966097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310005641.1A Active CN103017193B (en) | 2013-01-08 | 2013-01-08 | A kind of plate type ceramic air preheater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103017193B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112146488A (en) * | 2020-09-10 | 2020-12-29 | 山东旺泰科技有限公司 | Silicon carbide plate heat exchanger |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1986002718A1 (en) * | 1984-11-02 | 1986-05-09 | Mitsubishi Jukogyo Kabushiki Kaisha | Crossflow heat exchanger |
| CN2041803U (en) * | 1988-09-27 | 1989-07-26 | 张国祥 | Cast iron air preheater |
| CN201903066U (en) * | 2010-12-20 | 2011-07-20 | 洛阳瑞昌石油化工设备有限公司 | Low temperature dew point corrosion resistance enamel plate type air preheater |
| CN202002523U (en) * | 2011-04-13 | 2011-10-05 | 甘肃蓝科石化高新装备股份有限公司 | Lamella bundle for pure countercurrent flow lamella heat exchanger |
| CN202024634U (en) * | 2011-03-07 | 2011-11-02 | 中国矿业大学 | Anti-dirt-adherence efficient heat exchanger |
| CN203223935U (en) * | 2013-01-08 | 2013-10-02 | 洛阳瑞昌石油化工设备有限公司 | Plate-type ceramic air pre-heater |
-
2013
- 2013-01-08 CN CN201310005641.1A patent/CN103017193B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1986002718A1 (en) * | 1984-11-02 | 1986-05-09 | Mitsubishi Jukogyo Kabushiki Kaisha | Crossflow heat exchanger |
| CN2041803U (en) * | 1988-09-27 | 1989-07-26 | 张国祥 | Cast iron air preheater |
| CN201903066U (en) * | 2010-12-20 | 2011-07-20 | 洛阳瑞昌石油化工设备有限公司 | Low temperature dew point corrosion resistance enamel plate type air preheater |
| CN202024634U (en) * | 2011-03-07 | 2011-11-02 | 中国矿业大学 | Anti-dirt-adherence efficient heat exchanger |
| CN202002523U (en) * | 2011-04-13 | 2011-10-05 | 甘肃蓝科石化高新装备股份有限公司 | Lamella bundle for pure countercurrent flow lamella heat exchanger |
| CN203223935U (en) * | 2013-01-08 | 2013-10-02 | 洛阳瑞昌石油化工设备有限公司 | Plate-type ceramic air pre-heater |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112146488A (en) * | 2020-09-10 | 2020-12-29 | 山东旺泰科技有限公司 | Silicon carbide plate heat exchanger |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103017193B (en) | 2016-01-20 |
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Address after: 471003 No. 8, Yan Guang road, high and new technology development zone, Luoyang, Henan Patentee after: LUOYANG RUICHANG ENVIRONMENTAL ENGINEERING Co.,Ltd. Address before: 471003 No. 8, Yan Guang road, high and new technology development zone, Luoyang, Henan Patentee before: LUO YANG RUICHANG PETRO-CHEMICAL EQUIPMENT Co.,Ltd. |
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Denomination of invention: Plate type ceramic air preheater Effective date of registration: 20220217 Granted publication date: 20160120 Pledgee: Bank of China Limited by Share Ltd. Luoyang branch Pledgor: LUOYANG RUICHANG ENVIRONMENTAL ENGINEERING Co.,Ltd. Registration number: Y2022980001619 |
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Date of cancellation: 20230420 Granted publication date: 20160120 Pledgee: Bank of China Limited by Share Ltd. Luoyang branch Pledgor: LUOYANG RUICHANG ENVIRONMENTAL ENGINEERING Co.,Ltd. Registration number: Y2022980001619 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A plate type ceramic air preheater Effective date of registration: 20230421 Granted publication date: 20160120 Pledgee: Bank of China Limited by Share Ltd. Luoyang branch Pledgor: LUOYANG RUICHANG ENVIRONMENTAL ENGINEERING Co.,Ltd. Registration number: Y2023980038744 |