CN201735332U - Device for treating organic waste gas generated in sludge digestion - Google Patents
Device for treating organic waste gas generated in sludge digestion Download PDFInfo
- Publication number
- CN201735332U CN201735332U CN2009202991268U CN200920299126U CN201735332U CN 201735332 U CN201735332 U CN 201735332U CN 2009202991268 U CN2009202991268 U CN 2009202991268U CN 200920299126 U CN200920299126 U CN 200920299126U CN 201735332 U CN201735332 U CN 201735332U
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- gas
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- dry process
- inorganic oxide
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/20—Sludge processing
Abstract
The utility model provides a device for treating organic waste gas generated in sludge digestion, relates to the environmental protection technical field, and solves the problems of low efficiency, large treatment water amount, and high cost in the conventional treatment technique. The device adopts the technique combining wet-type treatment and dry-type treatment, comprises a ceramic carrier aerobic microbe purifier, a synthetic resin carrier aerobic microbe purifier, an inorganic oxidate purifier, a dust cloud separator, a biofilm filter, and the like, and further adopts circulating water treatment to resolve and oxidize more than 95% harmful gas. In addition, by adopting the device, methane and other inflammable gases can be reclaimed and reused, and the benefits of small waste water output, low running cost, less energy source consumption, resource conservation and environmental protection are achieved.
Description
Technical field
The utility model relates to the environmental technology field of the high-concentration organic waste gas treatment system that is produced in the Anaerobic Digestion process of high temperature in the mud, the organic waste gas treatment device that particularly a kind of sludge digestion produces.
Background technology
The treatment process of domestic sludge and fecaluria mud, high-temperature anaerobic fermentation technology is carried out digestion process in general both at home and abroad at present the use, contain multiple high concentration organic principle waste gas in the digestive gas that in the Anaerobic Digestion process, produces, as hydrogen sulfide, ammonia, methane, carbon dioxide, trimethylamine, styrene, methyl mercaptan, gases such as carbon disulfide, wherein the concentration of the hydrogen sulfide of fecaluria Sludge Digestion can reach 2000～4000ppm, be that a kind of meeting produces severe contamination to environment, equipment and material are had very strong corrosiveness and stench, very big to the health hazard of human body; Methane is a kind of imflammable gas, can be used as the renewable sources of energy-fuel, has recovery value.Therefore, be necessary should carry out comprehensive processing to digestive gas, available methane gas separated the back collect utilization again, will carry out decomposition and inversion to harmful gas is innoxious gas, reduces the possibility to air and water environment secondary pollution.Adopt the disposable biological doctor treatment at present, promptly decompose gases such as high-concentration hydrogen sulfide with the aerobic microbiological oxidation, water dissolves the gas that decomposes out again, this can make the concentration of hydrogen sulfide be reduced to below the 500ppm, such concentration can cause stronger corrosivity to equipment and material equally, can produce simultaneously a large amount of processing waste water again, it has higher acidic value, if general discharging causes secondary pollution to water environment, can only with in the alkaline matter and after could discharge outward, but some more reluctant gas such as methyl sulfides, styrene, methyl disulfides etc. still can be discharged in the atmosphere and go, in the outside of domestic sludge and fecaluria Treatment of Sludge field with also can smell an offensive odor on every side, this treatment process and method cost height simultaneously.
The utility model content
The purpose of this utility model provides that a kind of high-concentration organic waste gas treatment effect that sludge digestion is produced is good, and it is few to handle water, fuel gas organic efficiency height, the organic waste gas treatment device that the sludge digestion that operating cost is low produces.
For the treatment process and the technical scheme that realize above-mentioned utility model purpose as follows:
The organic waste gas treatment device that described sludge digestion produces, it is characterized in that having former and later two treatment process means, leading portion by ceramic monolith aerobic microbial cleaning device and the clean magnificent device of synthetic resin carrier aerobic microorganism form wet type processing device, back segment is the dry process device with inorganic matter clarifier, middle by the connection of biofilm filtration device, have digestive gas import airduct in the wet type processing device bottom, have the purified gas outlet pipe on dry process device top.The lower end of leading portion wet type processing device is circular treatment water tank (4), and the top of circular treatment water tank is followed successively by ceramic monolith aerobic microbial cleaning device (6), bottom spray equipment (7), synthetic resin carrier aerobic microbial cleaning device (8), top spray equipment (9), fume separator (10), wet processed gas outlet tube (11); Ceramic monolith aerobic microbial cleaning device (6) supports by the microbial cleaning device bearing (24) that is arranged on wet type processing device inside with synthetic resin carrier aerobic microbial cleaning device (8).Be provided with biofilm filtration device (13) in the outside of leading portion wet type processing device, circular treatment water tank (4) outlet is connected with stop valve (25) by circulating water pipe (15) with the biofilm filtration device, the biofilm filtration device is connected with water circulating pump (14) with stop valve by circulating water pipe, and the recirculated water delivery side of pump drenches device (31) and is connected with stop valve and bottom spray equipment (7), top spray equipment (9), inorganic oxide respectively by circulating water pipe and check-valves (26); The lower end of back segment dry process device is awl prodelta clay hydroecium (19), above awl prodelta clay hydroecium, be provided with inorganic oxide clarifier (18), supported by the inorganic oxide clarifier bearing (30) that is arranged on dry process device inside, the outside support of dry process device (17) is supported on the certain height position.On right side, dry process device upper end is purified gas outlet pipe (22), wet processed gas vent (11) is connected by digestive gas connecting pipe (23) and adjustable damper (28) with awl prodelta clay hydroecium, the wastewater discharge pipe (20) of biofilm filtration device (13) interconnects with the awl prodelta clay hydroecium (19) of dry process device and wastewater discharge pipe (20), having wet type processing device digestive gas import (5) at circular treatment water tank upper sidewall is connected with adjustable damper (28), have circular treatment water inlet pipe (3) at circular treatment water tank lower sides and be connected with stop valve, circular treatment water bypass pipe (12) is connected with the circulating water pipe of the awl prodelta clay hydroecium (19) of biofilm filtration device (13) and dry process device respectively.On digestive gas import airduct (2) inflow segment of wet type processing device, WET DIGESTION gas bypass airduct (27) is set to be connected with the digestive gas connecting pipe, on the digestive gas connecting pipe inflow segment of dry process device, dry slaking gas bypass airduct (29) is set is connected, simultaneously on the import and export for the treatment of apparatus and bypass airduct, all dispose adjustable damper with purified gas outlet pipe (22).Also have, the inorganic oxide of dry process device inside obtains saturation state after application after a while, when contacting with air, inorganic oxide produces the high temperature heating or the combustion phenomena of getting angry, when needing to change, open inorganic oxide replacement port (21), inorganic oxide drenches the safety measure that device (31) is used for drenching cooling.On technology during the system handles pernicious gas, technically must consider to be design principle with safety, purpose is in order to keep the normal operation of entire process device and system.
The ceramic monolith of described aerobic microorganism is that many micropores are cylindric, and the external diameter of each carrier is 12～15mm, and length is 15～25mm, and the packed height in ceramic monolith aerobic microbial cleaning device middle and lower part is 1～2 meter.
The synthetic resin carrier of described aerobic microorganism is that cavernous body is cubic, and each carrier is of a size of 25mm * 25mm * 25mm, and the packed height in ceramic monolith aerobic microbial cleaning device middle and upper part is 1～2 meter.
The formulation by weight of the inorganic oxide built-up section in the described inorganic oxide clarifier is: Fe
2O
3Percentage be 45～65%, Al
2O
3Percentage be 5～6%, SiO
2Percentage be 5～10%, the percentage of CaO is 6～15%, H
2The percentage of O is 7～12%.
Described inorganic oxide particles diameter is 8～10mm, and the packed height in the inorganic oxide clarifier is 0.5～2 meter.
Strip grid and netted filter screen are equipped with in the bottom of described ceramic monolith aerobic microbial cleaning device and synthetic resin carrier aerobic microbial cleaning device and inorganic oxide clarifier.
After digestive gas is through two aerobic microbe carrier clarifiers and bottom spray equipment and top spray equipment in the leading portion wet type processing device, the humidity of digestive gas has reached saturation state, flow in the fume separator, gas channel in fume separator has formed centrifugal force, the negative pressure region that utilizes centrifugal force to produce, gas is collected ditch through negative pressure region and herringbone, implement to the shunting that contains water and gas in the gas with separate, make gas present drying regime.
The digestive gas that contains the high concentration organic principle flow into ceramic monolith aerobic microbial cleaning device and synthetic resin carrier aerobic microbial cleaning device from the digestive gas import, the process bio-aeration, and the circular treatment water that has dissolved a large amount of air by parts such as water circulating pump and circulating water pipe and stop valve and check-valves when moist aerobic microorganism biological contacts, the aerobic microorganism carries out oxidation Decomposition with other pernicious gases such as hydrogen sulfide, and fall as its absorption of nutrient ingredients, when digestive gas enters fume separator, the concentration of organic principles such as hydrogen sulfide drops to below the 500ppm, flow into then in the inorganic oxide clarifier, via inorganic oxide to digestive gas further with after desulfurization absorption and the resolution process, the concentration of pernicious gases such as hydrogen sulfide is reduced to below the 50ppm, to reach more than 55～60% through gases such as flammable methane in the desulfurization processing back digestive gas of dry process device, outlet via the inorganic oxide clarifier is discharged, and can be recovered and store.
Circular treatment water carries out entering the circular treatment water tank after twice spray cleaned to digestive gas, because twice spray digestive gas dissolved in a large amount of acid sulphides, makes circular treatment water quality present the acid water quality and the sediment of PH3.0～2.5.Circular treatment water that band is acid and sediment enter the biofilm filtration device from the circular treatment water tank and obtain filtering and purify, again in the top spray equipment and bottom spray equipment that is connected with circulating water pipe by water circulating pump, other circular treatment water enters the biofilm filtration device respectively via the recirculated water by-pass line and awl prodelta clay hydroecium carries out the backwash processing, the acidic precipitation thing that is deposited in biofilm filtration device and the awl prodelta clay hydroecium is discharged via wastewater discharge pipe, the waste water that this moment, wastewater discharge pipe was discharged seldom can alleviate the process of subsequent processing device and the degree of environmental pollution so widely.Moreover permission with good conditionsi, can be external in the outlet of wastewater discharge pipe by form with drainage pipeline, waste water directly is drained in the bio-aeration pool of sewage treatment plant, the waste water that has acidic value can play a kind of acidic oxidation effect to sanitary sewage, can accelerate the biochemical treatment process to sanitary sewage like this.
The utility model is created has following beneficial effect:
1, adopts the aerobic microbial cleaning device of different carriers and the combination of inorganic oxide clarifier, reach the organic exhaust gas comprehensive treatment capability that sludge digestion is produced, both decomposed and oxidation processing technique, eliminated the sulfide of pernicious gas, the recovery combustible component is arranged, obvious processing effect, rate of recovery height.
2, adopted the circular treatment water, the technical scheme of biofilm filtration device and backwash has been saved the processing water greatly, and makes a large amount of reductions of waste water discharge rate and regeneration, the quickening biochemical treatment process to sewage, eliminates second environmental pollution.
3, the operating cost for the treatment of apparatus is low, has reduced the expense and the consumption that has reduced the energy of waste water draining post processing.
4,, reach the effect of resources conservation and environmental protection to the recycling of imflammable gas.
5, when needs are changed the inorganic oxide of saturation state, when contacting with air, inorganic oxide produces the high temperature heating or the combustion phenomena of getting angry, and inorganic oxide drenches the safety measure that device (31) is used for drenching cooling.On technology during the system handles pernicious gas, technically considered with safety to be design principle, the digestive gas of wet type processing device and dry process device is imported and exported, and bypass airduct and configuration adjustable damper are set, and can guarantee the normal operation of entire process device and system.
Description of drawings
Fig. 1 is the organic waste gas treatment device structural representation that the sludge digestion of utility model produces.The name of each sequence number is called among the figure:
The 1-wet type processing device, 2-digestive gas import airduct, 3-circular treatment water inlet pipe, 4-circular treatment water tank, the import of 5-wet type processing device digestive gas, 6-ceramic monolith aerobic microbial cleaning device, 7-bottom spray equipment, 8-synthetic resin carrier aerobic microbial cleaning device, 9-top spray equipment, the 10-fume separator, 11-wet processed gas vent, 12-circular treatment water bypass pipe, 13-biofilm filtration device, the 14-water circulating pump, the 15-circulating water pipe, 16-dry process device, the 17-support, 18-inorganic oxide clarifier, 19-awl prodelta clay hydroecium, the 20-wastewater discharge pipe, 21-inorganic oxide replacement port, 22-purified gas outlet pipe, 23-digestive gas connecting pipe, 24-microbial cleaning device bearing, the 25-stop valve, the 26-check-valves, 27-WET DIGESTION gas bypass airduct, the 28-adjustable damper, 29-dry slaking gas bypass airduct, 30-inorganic oxide clarifier bearing, the 31-inorganic oxide drenches device.
The specific embodiment
The technical scheme of the utility model being created below in conjunction with embodiment and accompanying drawing is described further.
With reference to figure 1, digestive gas after thermophilic digestion is handled in the mud process, at first enter the top of circulating water treatment case 4 from the wet type processing device digestion gas import 5 of front end wet type processing device 1 via digestive gas import airduct 2, pass through ceramic monolith aerobic microbial cleaning device 6 then, synthetic resin carrier aerobic microbial cleaning device 8 back digestive gas obtain rising, and drenching up and down by bottom spray equipment 7 and top spray equipment 9, digestive gas that drenches and absorption, fixing with live that moist aerobic microorganism contacts in the carrier space, effect is the aerobic microorganism to digestive gas, oxidation Decomposition and remove organic exhaust gas such as its high-concentration hydrogen sulfide, the hydrogen sulfide gas that belongs to acid ingredient can be decomposed more than 80% and generate sulfide and sediment, the also residual partial vulcanization thing that not oxidized decomposition is arranged, can be along with circular treatment water flow in the circular treatment water tank 4, circular treatment water in the circular treatment water tank 4 little by little presents acid state, its acidic value can reach pH3.0～pH2.5 and sediment, this moment, acid water can in time be discharged in the biofilm filtration device 13 via circulating water pipe 15 and stop valve 25, sulfide that hydrogen sulfide institute oxidation Decomposition is generated through the biofilm filtration device and sediment and other solvent components filter the waste water after obtaining filtering, carry out the backwash processing by flow through the circular treatment water that comes from circular treatment water bypass pipe 12 again, discharge via wastewater discharge pipe 20.Water after filtering through biofilm filtration device 13 leads to respectively in bottom spray equipment 7, the top spray equipment 9 spray of digestive gas by water circulating pump 14 and circulating water pipe 15 and stop valve 25, check-valves, and the recirculated waters in the circular treatment water tank 4 have obtained utilizing fully again.In order to keep water quality treatment in the circular treatment water tank 4 to be near the neutral value scope, can in time be replenished by circular treatment water inlet pipe 3, at any time the pH value of recirculated water is adjusted.
Digestive gas contained humidity after handling through leading portion wet type processing device 1 state that reached capacity, digestive gas enters shunting and the separating treatment that fume separator 10 carries out gas and water, the digestive gas that comes out from wet processed gas vent 11 is in drying regime, be connected to the dry process device 16 of back segment via digestive gas connecting pipe 23, the inorganic oxide clarifier bearing of establishing in inorganic oxide clarifier 18 quilts in the back segment dry process device 16 30, support and the medium position that is fixed on device, the bottom of dry process device 16 is provided with awl prodelta clay hydroecium 19, the bottom is connected to wastewater discharge pipe 20 and stop valve 25, wastewater discharge pipe 20 is provided with bypass pipe again, be connected with circular treatment water bypass pipe 12, be provided with purified gas outlet pipe 22 and inorganic oxide material replacement port 21 on dry process device top, the support 17 by dry process device 16 peripheral hardwares is supported on the certain height position.
Digestive gas by 1 processing of leading portion wet type processing device, flow into via digestive gas connecting pipe 23 in the bottom awl prodelta clay hydroecium 19 of back segment dry process device 16, obtain after the further oxidized decomposition of the inorganic oxide of digestive gas in inorganic oxide clarifier 18 rising, the pernicious gases such as hydrogen sulfide of final residual in digestive gas is cleaned to be disposed more than 95%, few indissolubility waste water and gas obtain discharging through wastewater discharge pipe 20, remaining imflammable gas such as methane are discharged from purified gas outlet pipe 22, be collected and store, directly be sent to act as a fuel burning or be used for fuel used to generate electricity of boiler as the renewable sources of energy.
On the technology during system handles high concentration pernicious gas, maintaining and be principle with the safe operation, be to fully take into account the possibility that system's design moves under unfavoured state technically, on digestive gas import airduct (2) inflow segment of wet type processing device, WET DIGESTION gas bypass airduct (27) is set to be connected with the digestive gas connecting pipe, on the digestive gas connecting pipe inflow segment of dry process device, dry slaking gas bypass airduct (29) is set is connected, simultaneously on the import and export for the treatment of apparatus and bypass airduct, all dispose adjustable damper with the purified gas outlet pipe.Produce the high temperature heating or the combustion phenomena of getting angry when inorganic oxide contacts with air, inorganic oxide drenches the safety measure that device (31) is used for drenching cooling.Purpose is in order to keep the normal operation of entire process device and system.
Claims (6)
1. the organic waste gas treatment device that produces of sludge digestion, it is characterized in that having former and later two treatment process means, the wet type processing device that leading portion is made up of ceramic monolith aerobic microbial cleaning device and the clean magnificent device of synthetic resin carrier aerobic microorganism, back segment is the dry process device with inorganic matter clarifier, middle by the connection of biofilm filtration device, have digestive gas import airduct in the wet type processing device bottom, have the purified gas outlet pipe on dry process device top.
2. the organic waste gas treatment device that sludge digestion according to claim 1 produces, it is characterized in that: the lower end of leading portion wet type processing device is circular treatment water tank (4), and the top of circular treatment water tank is followed successively by ceramic monolith aerobic microbial cleaning device (6), bottom spray equipment (7), synthetic resin carrier aerobic microbial cleaning device (8), top spray equipment (9), fume separator (10), wet processed gas outlet tube (11); Ceramic monolith aerobic microbial cleaning device (6) supports by the microbial cleaning device bearing (24) that is arranged on wet type processing device inside with synthetic resin carrier aerobic microbial cleaning device (8).Be provided with biofilm filtration device (13) in the outside of leading portion wet type processing device, circular treatment water tank (4) outlet is connected with stop valve (25) by circulating water pipe (15) with the biofilm filtration device, the biofilm filtration device is connected with water circulating pump (14) with stop valve by circulating water pipe, and the recirculated water delivery side of pump drenches device (31) and is connected with stop valve and bottom spray equipment (7), top spray equipment (9), inorganic oxide respectively by circulating water pipe and check-valves (26); The lower end of back segment dry process device is awl prodelta clay hydroecium (19), above awl prodelta clay hydroecium, be provided with inorganic oxide clarifier (18), supported by the inorganic oxide clarifier bearing (30) that is arranged on dry process device inside, the outside support of dry process device (17) is supported on the certain height position.On right side, dry process device upper end is purified gas outlet pipe (22), wet processed gas vent (11) is connected by digestive gas connecting pipe (23) and adjustable damper (28) with awl prodelta clay hydroecium, the wastewater discharge pipe (20) of biofilm filtration device (13) interconnects with the awl prodelta clay hydroecium (19) of dry process device and wastewater discharge pipe (20), having wet type processing device digestive gas import (5) at circular treatment water tank upper sidewall is connected with adjustable damper (28), have circular treatment water inlet pipe (3) at circular treatment water tank lower sides and be connected with stop valve, circular treatment water bypass pipe (12) is connected with the circulating water pipe of the awl prodelta clay hydroecium (19) of biofilm filtration device (13) and dry process device respectively.On digestive gas import airduct (2) inflow segment of wet type processing device, WET DIGESTION gas bypass airduct (27) is set to be connected with the digestive gas connecting pipe, on the digestive gas connecting pipe inflow segment of dry process device, dry slaking gas bypass airduct (29) is set is connected, simultaneously on the import and export for the treatment of apparatus and bypass airduct, all dispose adjustable damper with purified gas outlet pipe (22).
3. the organic waste gas treatment device that sludge digestion according to claim 1 and 2 produces, the ceramic monolith that it is characterized by the aerobic microorganism is that many micropores are cylindric, the external diameter of each carrier is 12～15mm, and length is 15～25mm, and the packed height in clarifier is 1～2 meter.
4. the organic waste gas treatment device that sludge digestion according to claim 1 and 2 produces, the synthetic resin carrier that it is characterized by the aerobic microorganism is that cavernous body is cubic, each carrier is of a size of 25mm * 25mm * 25mm, and the packed height in clarifier is 1～2 meter.
5. the organic waste gas treatment device that sludge digestion according to claim 1 and 2 produces, it is characterized by the inorganic oxide particles diameter is 8～10mm, the packed height in the inorganic oxide clarifier is 0.5～2 meter.
6. the organic waste gas treatment device that sludge digestion according to claim 1 and 2 produces, strip grid and netted filter screen are equipped with in the bottom that it is characterized by described ceramic monolith aerobic microbial cleaning device and synthetic resin carrier aerobic microbial cleaning device and inorganic oxide clarifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202991268U CN201735332U (en) | 2009-12-23 | 2009-12-23 | Device for treating organic waste gas generated in sludge digestion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202991268U CN201735332U (en) | 2009-12-23 | 2009-12-23 | Device for treating organic waste gas generated in sludge digestion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201735332U true CN201735332U (en) | 2011-02-09 |
Family
ID=43550613
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202991268U Expired - Fee Related CN201735332U (en) | 2009-12-23 | 2009-12-23 | Device for treating organic waste gas generated in sludge digestion |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201735332U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109011971A (en) * | 2018-08-06 | 2018-12-18 | 东华工程科技股份有限公司 | A kind of sludge drying tail gas processing equipment and method |
| CN112759206A (en) * | 2020-12-19 | 2021-05-07 | 苏州础润环境修复科技有限公司 | Sludge treatment tank ventilation device and operation method thereof |
-
2009
- 2009-12-23 CN CN2009202991268U patent/CN201735332U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109011971A (en) * | 2018-08-06 | 2018-12-18 | 东华工程科技股份有限公司 | A kind of sludge drying tail gas processing equipment and method |
| CN112759206A (en) * | 2020-12-19 | 2021-05-07 | 苏州础润环境修复科技有限公司 | Sludge treatment tank ventilation device and operation method thereof |
| CN112759206B (en) * | 2020-12-19 | 2023-05-23 | 深圳市洪桦环保科技有限公司 | Air interchanger of sludge treatment tank and operation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110209 Termination date: 20131223 |