CN208591701U - A kind of system being classified oxidative absorption formula flue gas desulfurization and denitrification - Google Patents
A kind of system being classified oxidative absorption formula flue gas desulfurization and denitrification Download PDFInfo
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- CN208591701U CN208591701U CN201821068582.7U CN201821068582U CN208591701U CN 208591701 U CN208591701 U CN 208591701U CN 201821068582 U CN201821068582 U CN 201821068582U CN 208591701 U CN208591701 U CN 208591701U
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- tower
- flue gas
- oxidation
- absorption formula
- oxidative absorption
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 75
- 239000003546 flue gas Substances 0.000 title claims abstract description 75
- 230000001590 oxidative effect Effects 0.000 title claims abstract description 47
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 32
- 230000023556 desulfurization Effects 0.000 title claims abstract description 32
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 22
- 230000003647 oxidation Effects 0.000 claims abstract description 104
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 104
- 230000003750 conditioning effect Effects 0.000 claims abstract description 29
- 239000000779 smoke Substances 0.000 claims abstract description 17
- 239000003054 catalyst Substances 0.000 claims description 22
- 239000007800 oxidant agent Substances 0.000 claims description 18
- 238000001035 drying Methods 0.000 claims description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 10
- 239000003795 chemical substances by application Substances 0.000 claims description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 8
- 229910052760 oxygen Inorganic materials 0.000 claims description 8
- 239000001301 oxygen Substances 0.000 claims description 8
- 230000005587 bubbling Effects 0.000 claims description 5
- 235000019738 Limestone Nutrition 0.000 claims description 4
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 4
- 239000001110 calcium chloride Substances 0.000 claims description 4
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 4
- 238000006555 catalytic reaction Methods 0.000 claims description 4
- 239000006028 limestone Substances 0.000 claims description 4
- 239000012286 potassium permanganate Substances 0.000 claims description 4
- 239000007921 spray Substances 0.000 claims description 4
- 239000011800 void material Substances 0.000 claims description 4
- 229910052748 manganese Inorganic materials 0.000 claims description 3
- 239000011572 manganese Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 9
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 5
- 239000000243 solution Substances 0.000 description 9
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 239000003610 charcoal Substances 0.000 description 4
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 238000003916 acid precipitation Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
The utility model discloses a kind of systems for being classified oxidative absorption formula flue gas desulfurization and denitrification, including secondary conditioning Tower, stair oxidation tower, a conditioning Tower and secondary oxidation tower；Smoke air inlet after the setting of stair oxidation tower lower part is once humidified, conditioning Tower is connected by smoke air inlet after being once humidified with stair oxidation tower, flue gas exhaust mouth after stair oxidation is provided at the top of stair oxidation tower, the lower part of secondary oxidation tower is provided with smoke air inlet after secondary humidification, flue gas exhaust mouth after secondary oxidation is provided at the top of secondary oxidation tower, it is connected at the top of secondary conditioning Tower with flue gas exhaust mouth after stair oxidation, the lower part of secondary conditioning Tower is connected with smoke air inlet after secondary humidification.Classification oxidative absorption formula desulphurization denitration can be carried out to flue gas using the utility model, efficient desulfurization and denitration process can be carried out simultaneously, by being humidified and aoxidizing twice twice, desulfurization off sulfide effect is effectively increased, have a vast market foreground.
Description
Technical field
The utility model relates to environmental technology field, specifically a kind of classification oxidative absorption formula flue gas desulfurization and denitrification is
System.
Background technique
Nowadays, as Chinese science and technology is quickly grown, people are also higher and higher to the attention degree of environment.Wherein, flue gas is made
It is the main reason for polluting residential block atmosphere for the mixture of gas and flue dust.Due to complicated component in flue gas, wherein contain
Oxynitrides and sulfur dioxide can not only damage human body, still be the major reason to form acid rain, and acid rain is not only tight
The rotten candle building of weight and communal facility, and the forest and crops of large area are damaged, great economy is caused to country every year
Loss.Therefore, it in order to reduce pollution of the flue gas to environment, needs to handle flue gas.But fume treatment common at present
Desulphurization and denitration processing is mostly individually carried out, or by individual desulphurization and denitration equipment simple combination, treatment effect is simultaneously paid no attention to
Think.Therefore, the problem of designing a kind of system for being classified oxidative absorption formula flue gas desulfurization and denitrification, becoming urgent need to resolve.
Utility model content
The purpose of this utility model is to provide a kind of systems for being classified oxidative absorption formula flue gas desulfurization and denitrification, on solving
State the problem of proposing in background technique.
To achieve the above object, the utility model provides the following technical solutions:
A kind of system being classified oxidative absorption formula flue gas desulfurization and denitrification, including secondary conditioning Tower, stair oxidation tower, primary increasing
Wet tower, secondary oxidation tower and heat exchanger；Smoke air inlet after the setting of stair oxidation tower lower part is once humidified, it is primary to be humidified
Tower is connected by smoke air inlet after being once humidified with stair oxidation tower, after being provided with stair oxidation at the top of stair oxidation tower
Flue gas exhaust mouth, stair oxidation tower are spray void tower, and the lower part of secondary oxidation tower is provided with smoke air inlet after secondary humidification,
Flue gas exhaust mouth after secondary oxidation is provided at the top of secondary oxidation tower, secondary oxidation tower is jet bubbling tower, secondary conditioning Tower
Top is connected with flue gas exhaust mouth after stair oxidation, and the lower part of secondary conditioning Tower is connected with smoke air inlet after secondary humidification, increases
Pressure fan is connected by heat exchanger with a conditioning Tower.
As a further solution of the present invention: flue gas exhaust mouth is connected with heat exchanger after the secondary oxidation；It is described
Heat exchanger is connected with drying tower；The drying tower is connected with chimney.
Oxidation fan is also connected on the stair oxidation tower as a further solution of the present invention,.
The stair oxidation tower passes through the conveying oxidation of oxidant holding vessel as a further solution of the present invention,
Agent, and oxidant is CaCl2O4、KMnO4It is mixed with lime stone according to the ratio of 1:1:1.
Blower is also connected on the secondary oxidation tower as a further solution of the present invention,.
The secondary oxidation tower passes through oxidation agent storage device conveying catalysis as a further solution of the present invention,
Agent, and catalyst is one of manganese systems metal and its oxide.
The catalyst loads on the activated carbon as a further solution of the present invention,.
Secondary oxidation tower lower part is connected with oxidant recyclable device as a further solution of the present invention,.
The booster fan goes out untreated flue gas with from secondary oxidation tower as a further solution of the present invention,
Flue gas exchanges heat in such a way that mediate contact is conducted heat in heat exchanger after the secondary oxidation come.
Application of the system of the classification oxidative absorption formula flue gas desulfurization and denitrification in flue gas desulfurization and denitrification.
Compared with prior art, the utility model has the beneficial effects that
Classification oxidative absorption formula desulphurization denitration can be carried out to flue gas using the utility model, can be carried out simultaneously efficient
Desulfurization and denitration process effectively increase desulfurization off sulfide effect, before having a vast market by being humidified and aoxidizing twice twice
Scape.
Detailed description of the invention
Fig. 1 is the system block diagram of the utility model.
In figure: 1- aoxidizes agent storage device, 2- oxidant recyclable device, 3- blower, bis- conditioning Towers of 4-, the storage of 5- oxidant
Deposit tank, 6- stair oxidation tower, 7- oxidation fan, conditioning Tower of 8-, 9- secondary oxidation tower, 10- heat exchanger, 11- drying tower,
12- chimney, 13- booster fan.
Specific embodiment
The utility model is described in more detail in the following with reference to the drawings and specific embodiments.Following embodiment will have
Help those skilled in the art and further understand the utility model, but does not limit the utility model in any form.It should refer to
Out, to those skilled in the art, without departing from the concept of the premise utility, if can also make
Dry modification and improvement.It encloses in these protection gardens for belonging to the utility model.
Embodiment 1
Referring to Fig. 1, a kind of system for being classified oxidative absorption formula flue gas desulfurization and denitrification, including secondary conditioning Tower 4, level-one oxygen
Change 6, conditioning Towers 8 of tower, secondary oxidation tower 9 and heat exchanger 10；Cigarette after 6 lower part of the stair oxidation tower setting is once humidified
Gas air inlet, the flue gas exhaust mouth after the top of stair oxidation tower 6 is provided with stair oxidation, the stair oxidation tower 6 are spray
Void tower is also connected with oxidation fan 7 on the stair oxidation tower 6, conveys oxygen into stair oxidation tower 6 by oxidation fan 7,
Oxidation efficiency is improved, the stair oxidation tower 6 conveys oxidant by oxidant holding vessel 5, and the oxidant is CaCl2O4、
KMnO4It is mixed with lime stone according to the ratio of 1:1:1；
The lower part of the secondary oxidation tower 9 is provided with smoke air inlet after secondary humidification, sets at the top of secondary oxidation tower 9
It is equipped with flue gas exhaust mouth after secondary oxidation, the secondary oxidation tower is jet bubbling tower, is also connected on the secondary oxidation tower 9
Blower 3 conveys oxygen into secondary oxidation tower 9 by blower 3, improves oxidation efficiency, the catalyst be manganese systems metal and
One of its oxide, the catalyst load on the activated carbon, using active carbon as carrier supported catalyst, had made it both
The adsorption function of active charcoal, and the catalysis with catalyst, flue gas are generated sulfuric acid and be enriched in by catalysts
In charcoal datum hole gap, when desulfurization for a period of time hole energy sulfuric acid reach saturation after regenerate, release the active sites of catalyst, catalyst
Desulphurizing ability be restored；
4 top of the secondary conditioning Tower is connected with flue gas exhaust mouth after stair oxidation, the lower part of the secondary conditioning Tower 4 and
Smoke air inlet is connected after secondary humidification, and the secondary oxidation tower 9, which passes through, aoxidizes the conveying catalyst of agent storage device 1, and described two
9 lower part of grade oxidizing tower is connected with oxidant recyclable device 2, and the catalyst of catalytic capability will be lost by oxidant recyclable device 2
It is delivered in oxidation agent storage device 1 from the recycling of secondary oxidation tower 9 and after carrying out activity recovery, flue gas is through second level after secondary oxidation
Flue gas exhaust mouth and heat exchanger 10 are fed through drying tower 11,12 row of chimney after drying by being connected with drying tower 11 after oxidation
Out, a conditioning Tower 8 is connected with smoke air inlet after primary humidification, is carried out by a conditioning Tower 8 to untreated flue gas
Primary humidification, after untreated flue gas enters heat exchanger 10 by booster fan 13, with the secondary oxidation come out from secondary oxidation tower 9
Flue gas exchanges heat in such a way that mediate contact is conducted heat in heat exchanger 10 afterwards, and flue gas is heated rear temperature liter after secondary oxidation
Height is conducive to carry out preliminarily dried to it, has saved the energy, is discharged after being dried into drying tower 11 from chimney 12, does not locate
The cooled rear temperature decline of flue gas is managed, is conducive to be humidified and be aoxidized, avoid influence of the high temperature to equipment, be conducive to improve
Desulfurization off sulfide effect, then, untreated flue gas enters in a conditioning Tower 8 and is once humidified after cooling, passes through secondary humidification
Tower 4 cools down flue gas recirculation sprinkling industry water after once oxidation three times, while continuously filling into industry water, water to secondary conditioning Tower 4
Flue-gas temperature, which declines while becoming water saturation flue gas, after secondary humidification after sprinkling enters secondary oxidation tower 9, is conducive to carry out two
Grade oxidation, further improves denitrification efficiency.
Embodiment 2
Flue gas is carried out at desulphurization denitration using the system for being classified oxidative absorption formula flue gas desulfurization and denitrification described in embodiment 1
Reason, referring to Fig. 1, after untreated flue gas enters heat exchanger 10 by booster fan 13, it is secondary with being come out from secondary oxidation tower 9
Flue gas exchanges heat in such a way that mediate contact is conducted heat in heat exchanger 10 after oxidation, temperature after flue gas is heated after secondary oxidation
Degree increases, and is conducive to carry out preliminarily dried to it, has saved the energy, from 12 row of chimney after being dried subsequently into drying tower 11
Out；Temperature decline, is conducive to be humidified and be aoxidized, avoid influence of the high temperature to equipment, have after untreated flue gas is cooled
Conducive to raising desulfurization off sulfide effect.
Then, untreated flue gas is once humidified into a conditioning Tower 8 is interior after cooling, is conducive to carry out level-one oxygen
Change, improve desulfurization off sulfide effect, smoke air inlet enters stair oxidation tower 6 after flue gas is humidified by level-one after primary humidification
It is interior, stair oxidation is carried out using spray void tower, oxidant is conveyed to stair oxidation tower 6 by oxidant holding vessel 5, passes through oxidation
Blower 7 conveys oxygen into stair oxidation tower 6, improves oxidation efficiency, and the oxidant is CaCl2O4、KMnO4With lime stone
It is mixed according to the ratio of 1:1:1, sprayed slurry volume and flue gas volume ratio are 18, complete level-one by stair oxidation tower 6
Oxidation.
Then, flue gas enters secondary conditioning Tower 4 by flue gas exhaust mouth after stair oxidation and carries out secondary increasing after stair oxidation
It is wet, industry water is sprayed to flue gas recirculation after once oxidation by secondary conditioning Tower 4 and is cooled down three times, while continuously to secondary conditioning Tower
4 fill into industry water, and flue-gas temperature, which declines while becoming water saturation flue gas, after the secondary humidification after water sprinkling enters secondary oxidation tower
9, be conducive to carry out secondary oxidation, further improve denitrification efficiency.
Flue gas is entered in secondary oxidation tower 9 by smoke air inlet after secondary humidification after secondary humidification, using jet bubbling
Tower carries out secondary oxidation, and injection bubbling pipe immersion liquid depth is 200mm, flue gas injection speed 20m/s, by aoxidizing agent storage device
1 conveying catalyst, while oxygen is conveyed into secondary oxidation tower 9 by blower 3, oxidation efficiency is improved, the catalyst is
Manganese series oxides, the catalyst load on the activated carbon, using active carbon as carrier supported catalyst, make it both have work
Property charcoal adsorption function, and the catalysis with catalyst, flue gas are generated by catalyst and sulfuric acid and are enriched in charcoal datum hole
In gap, when desulfurization for a period of time hole energy sulfuric acid reach saturation after regenerate, release the active sites of catalyst, the desulfurization of catalyst
Ability is restored, and the catalyst for losing catalytic capability is recycled and carried out from secondary oxidation tower 9 by oxidant recyclable device 2
It is delivered to after activity recovery in oxidation agent storage device 1 and is utilized again, improve service efficiency, energy conservation and environmental protection, second level oxygen
Flue gas flue gas exhaust mouth and heat exchanger 10 after secondary oxidation are fed through drying tower 11 after change, it is dry after by with 11 phase of drying tower
Chimney 12 even is discharged.
Classification oxidative absorption formula desulphurization denitration can be carried out to flue gas using the utility model, can be carried out simultaneously efficient
Desulfurization and denitration process effectively increase desulfurization off sulfide effect, before having a vast market by being humidified and aoxidizing twice twice
Scape.
The better embodiment of the utility model is explained in detail above, but the utility model be not limited to it is above-mentioned
Embodiment can also not depart from the utility model ancestor within the knowledge of one of ordinary skill in the art
Various changes can be made under the premise of purport.There is no necessity and possibility to exhaust all the enbodiments.And it thus amplifies out
Obvious changes or variations still in the protection scope of the utility model among.
Claims (9)
1. a kind of system for being classified oxidative absorption formula flue gas desulfurization and denitrification, which is characterized in that including secondary conditioning Tower (4), level-one
Oxidizing tower (6), a conditioning Tower (8), secondary oxidation tower (9) and heat exchanger (10)；Stair oxidation tower (6) lower part is provided with
Smoke air inlet after primary humidification, a conditioning Tower (8) pass through smoke air inlet and stair oxidation tower (6) phase after being once humidified
Even, flue gas exhaust mouth after stair oxidation is provided at the top of stair oxidation tower (6), stair oxidation tower (6) is to spray void tower, two
The lower part of grade oxidizing tower (9) is provided with smoke air inlet after secondary humidification, is provided with second level oxygen at the top of secondary oxidation tower (9)
Flue gas exhaust mouth after change, secondary oxidation tower are jet bubbling tower, secondary conditioning Tower (4) top and flue gas exhaust mouth after stair oxidation
It is connected, the lower part of secondary conditioning Tower (4) is connected with smoke air inlet after secondary humidification, and booster fan (13) passes through heat exchanger (10)
It is connected with a conditioning Tower (8).
2. the system of classification oxidative absorption formula flue gas desulfurization and denitrification according to claim 1, which is characterized in that the second level
Flue gas exhaust mouth is connected with heat exchanger (10) after oxidation；The heat exchanger (10) is connected with drying tower (11)；The drying tower
(11) it is connected with chimney (12).
3. the system of classification oxidative absorption formula flue gas desulfurization and denitrification according to claim 1 or 2, which is characterized in that described
Oxidation fan (7) are also connected on stair oxidation tower (6).
4. the system of classification oxidative absorption formula flue gas desulfurization and denitrification according to claim 3, which is characterized in that the level-one
Oxidizing tower (6) conveys oxidant by oxidant holding vessel (5), and oxidant is CaCl2O4、KMnO4With lime stone according to 1:1:
1 ratio mixes.
5. the system of classification oxidative absorption formula flue gas desulfurization and denitrification according to claim 1, which is characterized in that the second level
Blower (3) are also connected on oxidizing tower (9).
6. the system of classification oxidative absorption formula flue gas desulfurization and denitrification according to claim 5, which is characterized in that the second level
Oxidizing tower (9) conveys catalyst by oxidation agent storage device (1), and catalyst is one in manganese systems metal and its oxide
Kind.
7. the system of classification oxidative absorption formula flue gas desulfurization and denitrification according to claim 6, which is characterized in that the catalysis
Agent loads on the activated carbon.
8. the system of classification oxidative absorption formula flue gas desulfurization and denitrification according to claim 6, which is characterized in that the second level
Oxidizing tower (9) lower part is connected with oxidant recyclable device (2).
9. the system of classification oxidative absorption formula flue gas desulfurization and denitrification according to claim 1, which is characterized in that the pressurization
Blower (13) is by untreated flue gas and between flue gas passes through in heat exchanger (10) after the secondary oxidation that secondary oxidation tower (9) come out
The mode for connecing transmission of heat by contact exchanges heat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821068582.7U CN208591701U (en) | 2018-07-06 | 2018-07-06 | A kind of system being classified oxidative absorption formula flue gas desulfurization and denitrification |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821068582.7U CN208591701U (en) | 2018-07-06 | 2018-07-06 | A kind of system being classified oxidative absorption formula flue gas desulfurization and denitrification |
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| Publication Number | Publication Date |
|---|---|
| CN208591701U true CN208591701U (en) | 2019-03-12 |
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| CN201821068582.7U Active CN208591701U (en) | 2018-07-06 | 2018-07-06 | A kind of system being classified oxidative absorption formula flue gas desulfurization and denitrification |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111525162A (en) * | 2020-04-28 | 2020-08-11 | 苏州市华昌能源科技有限公司 | Humidifying device and humidifying method for fuel cell testing system |
-
2018
- 2018-07-06 CN CN201821068582.7U patent/CN208591701U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111525162A (en) * | 2020-04-28 | 2020-08-11 | 苏州市华昌能源科技有限公司 | Humidifying device and humidifying method for fuel cell testing system |
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Legal Events
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: 277800 1-1 in the old family planning office yard, Taishan North Road, Xingren street, high tech Zone, Zaozhuang City, Shandong Province Patentee after: SHANDONG RUIJIA VENTILATION ENVIRONMENTAL PROTECTION TECHNOLOGY CO.,LTD. Address before: 277800 kuangshanyao village committee courtyard, Xingren sub district office, Taishan North Road, high tech Zone, Zaozhuang City, Shandong Province Patentee before: SHANDONG RUIJIA VENTILATION ENVIRONMENTAL PROTECTION TECHNOLOGY CO.,LTD. |
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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 utility model: A system of staged oxidation absorption flue gas desulfurization and denitrification Effective date of registration: 20230112 Granted publication date: 20190312 Pledgee: Zaozhuang Rural Commercial Bank Co.,Ltd. Gaoxin sub branch Pledgor: SHANDONG RUIJIA VENTILATION ENVIRONMENTAL PROTECTION TECHNOLOGY CO.,LTD. Registration number: Y2023980031052 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Granted publication date: 20190312 Pledgee: Zaozhuang Rural Commercial Bank Co.,Ltd. Gaoxin sub branch Pledgor: SHANDONG RUIJIA VENTILATION ENVIRONMENTAL PROTECTION TECHNOLOGY CO.,LTD. Registration number: Y2023980031052 |