CN203741192U - Innocent treatment system for wastes in coal chemical industry - Google Patents
Innocent treatment system for wastes in coal chemical industry Download PDFInfo
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- CN203741192U CN203741192U CN201320449541.3U CN201320449541U CN203741192U CN 203741192 U CN203741192 U CN 203741192U CN 201320449541 U CN201320449541 U CN 201320449541U CN 203741192 U CN203741192 U CN 203741192U
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- flue gas
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
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Abstract
The utility model discloses an innocent treatment system for wastes in the coal chemical industry. The innocent treatment system is characterized by comprising a coal active sludge drying system, a high-temperature flue gas preparation system, a high-temperature spray drying system and a waste heat recovery system arranged sequentially, wherein the sludge drying system comprises a mechanical pressure filter, a primary sludge dryer, a steam-water separator and a secondary sludge dryer; the high-temperature flue gas preparation system comprises a proportioning bin, a fixed bed coal-fired boiler and a cyclone separator; the high-temperature spray drying system comprises a high-temperature spray drying tower, an efficient dust collector and a bag-type dust collector; the waste heat recovery system comprises a waste heat boiler, a boiler feed water heater and an air pre-heater. By adopting the treatment system disclosed by the utility model, an active sludge drying technology, a high-temperature spray technology and a waste heat recovery technology are realized, hazardous waste treatment of the coal chemical industry is realized, organic matters in active sludge and strong brine are eliminated, heat is recovered, and comprehensive utilization of resources is realized.
Description
Technical field
The utility model belongs to coal chemical technology, specifically belongs to solid dangerous waste innoxious process for treating field in Coal Chemical Industry industry.
Background technology
Along with the development of China's Coal Chemical Industry industry, the requirement of environment protection is also more and more higher, and the project of planning to build at present generally requires the zero release of resource, especially the zero release of water resources.Waste water resource also can generating portion pollutent in recycle process, especially the active sludge producing in sewage treatment process and the strong brine through producing in desalination reuse process, if directly outer row can cause secondary pollution to environment, the processing approach that therefore how to solve active sludge and strong brine is the major issue that restriction Coal Chemical Industry develops in a healthy way.
Existing activated sludge treatment method comprises Sludge landfill, agricultural sludge and sludge anhydration burning etc.Sludge landfill has the shortcoming of self, mainly that active sludge especially contains pollution substance from the active sludge of Coal Chemical Industry itself, easily cause secondary pollution, need to be sent to the useless processing enter of local danger and burn rear landfill, greatly increase processing cost, and need to take a large amount of land areas, therefore burying method application at present reduces gradually.The shortcoming of agricultural sludge is that organic matter that has part difficult degradation in active sludge etc. can cause environmental pollution, and the pollution of the loss of nitrogen, phosphorus to surface water and groundwater.Along with environmental standard improves, the restriction of agricultural sludge is also more and more stricter.The method of anhydration and incineration, after drying and other treatment, the volume of mud can significantly reduce, and realizes the important step of pollutant resources.Burning is the important means of the organic pollutant that contains of lignin-sludge, but simple burning can bring other problems, in burning process, also can produce the pollutent such as dioxin, heavy metal flying dust, therefore incinerator must increase extra environmental protection facility and processes these pollutents.Moreover in mud, contain part calorific value, how rationally reclaiming this part heat is also the problem that will solve in sludge incineration technique.
The processing of strong brine is also problem demanding prompt solution.In Coal Chemical Industry industry, mainly adopt the pattern of building evaporation pond spontaneous evaporation for the processing of strong brine at present, the place of production of spontaneous evaporation technique is larger, and is subject to local climate environmental influence high, cannot extensively promote.In purified salt and percolate treatment industry, strong brine adopts multiple-effect evaporation technology more, but the strong brine in Coal Chemical Industry industry from sewage biochemical treatment and recirculated water reuse after, in water quality, contain the residual of the toxic substance such as phenol, prussiate, adopt multiple-effect evaporation technique, the one, easily cause the fouling of crystallizer, cause whole system to need often to clean, increase running cost.And this part residual toxic substance can be along with salt crystallization, crystalline solid salt cannot, directly as raw material or as the processing of general industry solid waste, be increased extra processing cost, and easily produce the problem of secondary pollution.
Utility model content
The purpose of this utility model is to provide a kind of Coal Chemical Industry industry refuse innocuity disposal system, utilize this system can disposable solution active sludge and the secondary pollution problem that produces of strong brine crystallization, and working cost is low, and effectively reclaim heat, realize the comprehensive utilization of resource.
In order to achieve the above object, refuse innocuity disposal system in Coal Chemical Industry industry of the present utility model, comprises coal activity sludge dry system, high-temperature flue gas preparation system, strong brine high temperature spray-drying system and the residual neat recovering system arranged successively; Wherein:
Described sludge dry system comprises mechanical filter press, mud primary drying device, steam separator, mud redrier;
Described high-temperature flue gas preparation system comprises batch bin, fixed bed coal firing boiler and cyclonic separator;
Described strong brine high temperature spray-drying system comprises high temperature spray-drying tower, brinepump, brine preheater, high-efficiency dust remover and sack cleaner;
Described residual neat recovering system comprises waste heat boiler, boiler water-suppling heater and air preheater.
Utilize above-mentioned treatment system as follows to refuse method for innocent treatment in Coal Chemical Industry industry:
The first step: active sludge dry
After mechanical filter press dehydration, become wet mud from the active sludge of coal chemical industry sewage treatment unit, wet mud in primary drying device through the preliminary primary drying of flue gas from residual neat recovering system; Then obtain dewatered sludge through redrier, redrying is taked contact drying mode, is dried by the steam of residual neat recovering system by-product, and the water content after redrying in mud is below 10%;
Contain part steam from primary drying device flue gas out, after steam separator, after the steam condensate that the steam of separation and redrying obtain producing merges, be sent to coal chemical industry sewage biochemical treatment apparatus;
Second step: taking dewatered sludge as fuel, prepare high-temperature flue gas
The dewatered sludge obtaining through redrying is the batch bin to high-temperature flue gas generation systems by mechanical transport, in batch bin as required with bunker coal proportioning, be sent to fixed bed coal firing boiler; Organic matter in the indoor mud of boiler combustion fully burns, and produces high-temperature flue gas, adjusts dewatered sludge and bunker coal proportioning, controls flue-gas temperature 900～1000; High-temperature flue gas is removed the dust in flue gas through cyclonic separator, and the lime-ash of after-flame is discharged from boiler bottom, is sent to Coal Chemical Industry slag field;
The 3rd step: utilize high-temperature flue gas to carry out dried recovered processing to strong brine
The high-temperature flue gas being produced by second step enters high temperature spray-drying tower; While is from the strong brine of coal chemical sewage recycling multi-effect evaporation system, after brinepump and brine preheater pressurization preheating, by entering high temperature spray-drying tower after pressurized air atomization, under high-temperature flue gas effect, salt water vaporization, now requires temperature in spray-drying tower to reach 700-780 DEG C; For ensureing to maintain temperature in spray-drying tower, in high-temperature flue gas, add combustion-supporting gas; With this understanding, in strong brine, harmful organism such as phenol and prussiate is fully oxidized to CO
2, N
2and water, eliminate toxicity;
Above-mentioned combustion-supporting gas, from the process gas of Coal Chemical Industry, specifically refers to raw gas, purified gas or Sweet natural gas;
From the high temperature spray-drying tower flue gas with inorganic dust salt out, through high-efficiency dust remover, the inorganic dirt salt in trapping flue gas, then enters sack cleaner and removes remaining inorganic dirt salt.After the cooling collection of dust salt, pack outward transport, sells as product;
The 4th step: the utilization of flue gas after the recovery of preheating and recovery waste heat in flue gas
Remove flue gas after inorganic dirt salt through reclaiming after heat, by-product low-pressure steam, low-pressure steam is carried out redrying as the thermal source of redrier to mud, the about 0.5Mpa of vapor pressure, 160～180 DEG C of temperature; Flue gas after recovered steam is divided into two portions: the fixed bed boiler that a part is got back to second step as circulating flue gas further produces high-temperature flue gas; Another part is sent to the first step, as the thermal source of primary drying device, mud is carried out to primary drying after preheating.
The utility model, by combined activity drying sludge technology, high-temperature spray technology and heat recovery technology, is realized the useless processing of Coal Chemical Industry danger, the organic matter of eliminate activity mud and strong brine, and reclaim heat, realize the comprehensive utilization of resource.Whole utility model content and Coal Chemical Industry single unit system are organically combined, and reduce processing cost, and the environment protection to whole project, resource zero release, provide economic benefit, has positive meaning.
Brief description of the drawings
Fig. 1 is the block diagram of the utility model treatment system embodiment.
In figure: 1-sludge filter press, 2-primary drying device, 3-redrier, 4-steam separator, 5-batch bin, 6-coal firing boiler, 7-cyclonic separator, 8-high temperature spray-drying tower, 9-strong brine pump, 10-brine preheater, 11-high-efficiency dust remover, 12-sack cleaner, 13-waste heat boiler, 14-boiler water-suppling heater, 15-air preheater.
Embodiment
Fig. 1 is shown in by the utility model treatment system block diagram, as can be seen from Figure 1: comprise coal activity sludge dry system, high-temperature flue gas preparation system, strong brine high temperature spray-drying system and the residual neat recovering system arranged successively; Wherein:
Described sludge dry system comprises mechanical filter press 1, mud primary drying device 2, mud redrier 3 and steam separator 4;
Described high-temperature flue gas preparation system comprises batch bin 5, fixed bed coal firing boiler 6 and cyclonic separator 7;
Described strong brine high temperature spray-drying system comprises high temperature spray-drying tower 8, brinepump 9, brine preheater 10, high-efficiency dust remover 11 and sack cleaner 12;
Described residual neat recovering system comprises waste heat boiler 13, boiler water-suppling heater 14 and air preheater 15.
Utilize treatment system of the present invention to method that in Coal Chemical Industry industry, refuse carries out harmless treatment with the explanation of specific embodiment below.
Certain Coal Chemical Engineering Project need to be processed 37000 tons/year of active sludge (water content is more than 60%); High strong brine 18m
3/ h, its composition comprises: the about 250000mg/l of saltiness, chemical oxygen demand (COD
cr) about 5000～7500mg/l, approximately 60 DEG C of temperature.Require to realize the useless zero release of danger.
Referring to Fig. 1, from biochemical treatment active sludge after mechanical filter press 1 dehydration, become the more than 30% wet mud of water content, wet mud is sent in mud primary drying device 2 and carries out primary drying, by the flue tail gas convection drying from residual neat recovering system, after dry, gas enters steam separator 4, and the residual gas separating after moisture enters thermoelectric power station system for desulfuration and denitration.Enter redrier 3 through first dry mud, the steam indirect heating being produced by residual neat recovering system, removes moisture.Water of condensation in steam condensate and the steam separator 4 producing in redrier 3 is sent to biochemical sewage treatment device after merging.
Dried sludge moisture content, below 10%, is sent to batch bin 5.Mix burning with coal as fuel according to a certain percentage, in fixed bed coal firing boiler 6, produce high-temperature flue gas, approximately 900～1000 DEG C of high-temperature flue-gas, approximately 2000～3000 kgs/hour of coal consumptions.High-temperature flue gas enters cyclonic separator 7, and the high-temperature flue gas after purification enters high temperature spray-drying tower 8.For improving the fuel efficiency rate of active sludge and coal, regulate high-temperature flue-gas, part circulating flue gas enters coal firing boiler.Approximately 1250 kgs/hour of lime-ash that the dust separating from cyclonic separator 7 and boiler produce are sent to Coal Chemical Industry slag field.
From the 18m of Coal Chemical Industry multi-effect evaporating device
3the strong brine of/h, pressurizes through strong brine pump 9, and after brine preheater 10 heats up, atomization enters high temperature spray-drying tower 8, fully contacts with high-temperature flue gas, and in strong brine, organic high temperature oxidation decomposes.In high-temperature flue gas, add from the combustion-supporting gas of Coal Chemical Industry, control between 700～780 DEG C of the temperature of high temperature spray-drying tower 8.Enter high-efficiency dust remover 11 from high temperature spray-drying tower 8 flue gas with inorganic dust salt out and separate inorganic dust salt, flue gas after flash liberation enters sack cleaner 12 again and separates remaining inorganic dust salt, approximately 4500 kgs/hour of the inorganic dust salt of collecting do not contain any organic matter, cooling rear pack outward transport
Enter waste heat boiler 13 through the flue gas of twice dedusting, reclaim heat by-product low-pressure steam, low-pressure steam is as the thermal source of wet mud redrier 3, the about 0.5Mpa of vapor pressure, 160～180 DEG C of temperature.Flue gas after recovered steam is divided into two portions part and enters fixed bed boiler 6 as circulating flue gas, and another part enters mud primary drying device 2 after boiler water-suppling heater 14 and air preheater 15.
Claims (1)
1. a refuse innocuity disposal system in Coal Chemical Industry industry, is characterized in that, it comprises coal activity sludge dry system, high-temperature flue gas preparation system, high temperature spray-drying system and the residual neat recovering system arranged successively; Wherein:
Described sludge dry system comprises mechanical filter press, mud primary drying device, steam separator and mud redrier; The discharge port of mechanical filter press is connected with mud primary drying device opening for feed by travelling belt, and mud primary drying device discharge port is connected with mud redrier opening for feed, and the air outlet of mud primary drying device is connected with steam separator by pipeline:
Described high-temperature flue gas preparation system comprises batch bin, fixed bed coal firing boiler and cyclonic separator; Batch bin is connected with fixed bed coal firing boiler by travelling belt, and fixed bed coal firing boiler is connected with cyclonic separator by pipeline;
Described high temperature spray-drying system comprises high temperature spray-drying tower, high-efficiency dust remover and sack cleaner; Three connects successively by pipeline;
Described residual neat recovering system comprises waste heat boiler, boiler water-suppling heater and air preheater; Three connects successively by pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320449541.3U CN203741192U (en) | 2013-07-26 | 2013-07-26 | Innocent treatment system for wastes in coal chemical industry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320449541.3U CN203741192U (en) | 2013-07-26 | 2013-07-26 | Innocent treatment system for wastes in coal chemical industry |
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| Publication Number | Publication Date |
|---|---|
| CN203741192U true CN203741192U (en) | 2014-07-30 |
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ID=51341019
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|---|---|---|---|
| CN201320449541.3U Expired - Fee Related CN203741192U (en) | 2013-07-26 | 2013-07-26 | Innocent treatment system for wastes in coal chemical industry |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106016330A (en) * | 2016-05-16 | 2016-10-12 | 云南民族大学 | Method for treating alkali waste in coal chemical industry |
| CN111362551A (en) * | 2020-03-31 | 2020-07-03 | 中国华能集团清洁能源技术研究院有限公司 | Two-stage sludge drying and incinerating system of coal-fired power plant and operation method |
-
2013
- 2013-07-26 CN CN201320449541.3U patent/CN203741192U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106016330A (en) * | 2016-05-16 | 2016-10-12 | 云南民族大学 | Method for treating alkali waste in coal chemical industry |
| CN111362551A (en) * | 2020-03-31 | 2020-07-03 | 中国华能集团清洁能源技术研究院有限公司 | Two-stage sludge drying and incinerating system of coal-fired power plant and operation method |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140730 Termination date: 20160726 |
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| CF01 | Termination of patent right due to non-payment of annual fee |