CN1318435A - Comprehensive innocuous utilization technique of lake and city sludge - Google Patents
Comprehensive innocuous utilization technique of lake and city sludge Download PDFInfo
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- CN1318435A CN1318435A CN01108478A CN01108478A CN1318435A CN 1318435 A CN1318435 A CN 1318435A CN 01108478 A CN01108478 A CN 01108478A CN 01108478 A CN01108478 A CN 01108478A CN 1318435 A CN1318435 A CN 1318435A
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Abstract
The present invention belongs to the field of incineration treatment and comprehensive utilization of sludge. Collected and dried sludge, together with added sulphur fixing agent and chlorine fixing agent, is innocuously treated through melting and incineration; the produced high temperature fume is further burnt in a secondary burner with the afterheat being recovered by a preheating boiler; and the molten slag is made into building material. The comprehensive utilization technique to utilize sludge resource is suitable for various lake and city sludge and can eliminate the effect of dioxin and other harmful matter to environment.
Description
The invention belongs to sludge incineration processing and comprehensive utilization technique field
Along with the expansion day by day and the rapid economy development of city size, the quantum of output of municipal sludge constantly increases and brings serious harm for the ecological environment in The Surroundings in Cities and near river.The sharp increase of municipal sludge amount has brought obstacle to urban construction.Municipal sludge has accounted for very big ratio in the huge municipal refuse mountain.
In recent years, because for many years accumulation and never have effective treating method, the mud in lake pollutes and peripheral ecological environment is constituted a serious threat.It just is example with the Dian Chi, at present because the effective improvement method of neither one of going back is polluted in the Dian Chi, it is a thick layer of to have made mud deposit at the bottom of the pond, Dian Chi, and only 6.4 kilometers bank mud scums just reach more than 80,000 cubic metre, and the careless seabed mud area of Dian Chi reaches about 7.5 square kilometres.Mud and the marine nutritional labelings such as nitrogen, phosphorus that are rich in of grass provide sufficient nutrient to algae, make the algae overgrowing to be difficult to control, cause a large amount of aquatic animal death, and the self-purification capacity of Dian Chi is sharply descended; In addition, as various noxious materials and heavy metal element in the mud not being administered, then other method of administering the Dian Chi also is difficult to obtain effect in a short time.
Known Treatment of Sludge technology is also relatively backward, and most the employing applied fertilizer or the stacking processing, seldom uses the method for other efficient pollution-frees.Fertilizer treatment is a more traditional technology, but cause mud to second environmental pollution easily during fertilising, heavy metal in the mud enters into ecological environment with the fertilising process, this is to soil, plant, underground water, even atmosphere causes secondary pollution, simultaneously food security is constituted a serious threat, seriously the living environment of harm humans and health.At present various countries just be devoted to seek new innoxious, subtract appearanceization and resource method for sludge treatment.Mud carried out burning disposal as low calorie fuels because its have well innoxious, subtract appearanceization and the resource effect comes into one's own in some developed countries.But because traditional incineration temperature is lower, generally at 800～1000 ℃, other composition (as elements such as Cl, S) in the mud easily generates new noxious pollutants such as dioxin when burning.And various countries attach great importance to the pollution problem of dioxin violent in toxicity in recent years, so prior art can not adapt to the environmental requirement of current strictness.
The objective of the invention is to propose a kind of innoxious, subtract appearanceization and resource mud melting incinerating comprehensive utilization technique, it not only can reduce mud and utilize the generation of dioxin-like chemical in the process in burning, and realizes lake and municipal sludge comprehensive reutilization.
The present invention is achieved through the following technical solutions.
Fig. 1 is a process chart of the present invention.Moisture behind the drying sludge is 2-15%, and ash content is 70～90% (wherein contain sulphur (S), chlorine (Cl) element is 0.5～6%), and all the other are 5～18%.Lake and municipal sludge are salvaged, collected and drying, dried mud adds solid sulphur, chlorine-solidifying agent is prepared burden, the material for preparing enters melting furnace and carries out melting incinerating (harmless treatment), high-temperature flue gas behind melt-combustion enters secondary combustion chamber, after completing combustion, enter waste heat boiler and carry out waste heat recovery, the flue gas of discharging from waste heat boiler can carry out catalytic denitration after the cooling fast selectively through quench tower to be handled back (or according to the requirement of local environmental protection to fume emission, utilize additive method to carry out gas cleaning handle after) and discharges; After the flying dust that produces carries out harmless treatment, reclaim wherein valuable metal; Liquid slag is through shrend and sorting, and the iron in the slag (Fe), copper metals such as (Cu) are recycled by forming alloy; Remaining innoxious residue processes various construction material comprehensive utilizations according to the requirement of building occupancy.
Sulphur-fixing agent can be used calcium carbonate, calcium oxide, calcium hydroxide, di-iron trioxide, electroslag stone etc., and the weight ratio of sulfur content is 1.5～5 in addition and the mud, and chlorine-solidifying agent can be sodium carbonate or sodium acid carbonate, and the weight ratio of chlorinity is 1～2 in addition and the mud.The application number of the most handy the applicant's application of melting furnace is 00259909.0 combustion furnace, but thermal source electricity consumption, oil, combustion gas or the coal of melting furnace.Waste heat boiler can have economizer and air preheater.The flue gas of getting rid of from waste heat boiler is handled or is discharged the requirement of fume emission according to environmental protection again being quickly cooled within 2～4 seconds below 250 ℃, and innocent residue is made the paveio(u)r of road construction; Also can be equipped with cement or blast furnace ashes and pour into different shape piece brick, be directly used in the road pavement in pavement, park and the garden in cities and towns.
Advantage compared with prior art of the present invention: 1. pair various municipal sludges, the processing adaptability of lake sludge is strong; Moisture, composition to mud do not have strict demand.2. technological process is short, furnace bed index is high, and capital expenditure and trial run expense are lower.3. fire box temperature is higher than more than 1400 ℃; Flue dust and exhaust gas volumn are few; Dioxin emission almost approaches zero-emission far below discharging standards; Essentially no heavy metal pollution; Molten slag can regeneration, and useful metal is easy to regain.4. waste heat is easy to be recycled.5. that has realized mud subtracts appearanceization, innoxious and resource.
The composition of embodiment one 1. implementation condition sluge from Dianchi Lake:
Air-dried moisture: 2.85%; Dry basic ash content: 85.96% (wherein sulfur content is 4%, and chlorinity is 1.2%); Dry basic volatile matter: 10.27%; Dry basic fixed carbon: 0.92%; Air-dried basis low heat value: 1400kJ/kg; The primary air coefficient of excess: 0.82, the atmosphere in the melting furnace is reducing atmosphere; Auxiliary air coefficient of excess: 1.12; Auxiliary coal addition is a sludge quantity: 1.45 times; The CaO addition is that the weight ratio of sulfur content in the mud is 3.4; NaHCO
3The weight ratio of chlorinity is 1.5 in addition and the mud; 1. result of implementation melting incinerating temperature: 1472 ℃; Slag temperature: 1340 ℃; Melting furnace smokestack exit gas temperature: 1240 ℃; Metal recovery rate in the liquid slag is 95.4%; Be equipped with the square brick that 30% cement casting becomes 230 * 114 * 65mm.
The composition of embodiment 2 1. implementation condition municipal sludges (empty butt): air-dried moisture: 2.15%; Dry basic ash content: 83.80% (wherein sulphur accounts for 2.5%, and chlorine accounts for 3%); Dry basic volatile matter: 12.14% dry basic fixed carbon: 1.91%; Air-dried basis status calorific capacity: 3010kJ/kg; The primary air coefficient of excess: 0.95, the atmosphere in the melting furnace is reducing atmosphere; Auxiliary air coefficient of excess: 1.08; Auxiliary coal addition is a sludge quantity: 0.8 times; The CaO addition is that the weight ratio of sulfur content in the mud is 2.0; NaHCO
3Addition is that the weight ratio of chlorinity in the mud is 2; 2. result of implementation melting incinerating temperature: 1458 ℃; Liquid slag temperature: 1320 ℃; Melting furnace smokestack exit gas temperature: the metal recovery rate in 1214 ℃ of liquid slags is 95%; Be equipped with the square brick that 24% cement casting becomes 230 * 114 * 65mm.
Claims (4)
1. the technology of lake and the innoxious comprehensive utilization of municipal sludge, it is characterized in that: lake and municipal sludge are salvaged, collect, dried mud adds sulphur-fixing agent, chlorine-solidifying agent is prepared burden, the material for preparing enters melting furnace and carries out melting incinerating, and the flue gas behind the melting incinerating enters secondary combustion chamber, enters waste heat boiler and carry out waste heat recovery after completing combustion, liquid slag is through shrend and sorting, and metals such as iron wherein, copper form alloy and are used.Remaining innoxious residue is made construction material.
2. the technology of comprehensive utilization of mud according to claim 1, it is characterized in that: sulphur-fixing agent is calcium carbonate, calcium oxide, calcium hydroxide, di-iron trioxide, electroslag stone, the weight ratio of sulfur content is 1.5～5 in addition and the mud.
3. the technology of comprehensive utilization of mud according to claim 1, it is characterized in that: chlorine-solidifying agent is sodium acid carbonate, sodium carbonate, the weight ratio of chlorinity is 1～2 in addition and the mud.
4. the technology of comprehensive utilization of mud according to claim 1, it is characterized in that: waste heat boiler has province's coal gas and air preheater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01108478 CN1119209C (en) | 2001-05-28 | 2001-05-28 | Comprehensive innocuous utilization technique of lake and city sludge |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01108478 CN1119209C (en) | 2001-05-28 | 2001-05-28 | Comprehensive innocuous utilization technique of lake and city sludge |
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| Publication Number | Publication Date |
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| CN1318435A true CN1318435A (en) | 2001-10-24 |
| CN1119209C CN1119209C (en) | 2003-08-27 |
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| CN 01108478 Expired - Fee Related CN1119209C (en) | 2001-05-28 | 2001-05-28 | Comprehensive innocuous utilization technique of lake and city sludge |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105344698A (en) * | 2015-11-25 | 2016-02-24 | 上海绿澄环保科技有限公司 | Method for treating specific pollutants through high-temperature melting technology |
| CN105642654A (en) * | 2016-01-19 | 2016-06-08 | 青岛理工大学 | Synchronization technology of using waste heat of blast furnace slag to recycle sludge and reutilize chromic slag |
| CN105728434A (en) * | 2016-02-29 | 2016-07-06 | 中南大学 | Resourceful treatment method for waste circuit board |
| CN105728425A (en) * | 2016-01-19 | 2016-07-06 | 青岛理工大学 | Synchronization technology of ensuring biomasses to be resourceful and chromium slag to be harmless by utilizing steel slag waste heat |
| CN106167343A (en) * | 2016-08-31 | 2016-11-30 | 柳州市润广科技有限公司 | A kind of municipal sludge total system |
| CN110306054A (en) * | 2018-03-20 | 2019-10-08 | 荆门市格林美新材料有限公司 | A kind of recovery method of old circuit board valuable metal |
| CN111336520A (en) * | 2020-02-03 | 2020-06-26 | 山东清博生态材料综合利用有限公司 | Treatment method and treatment device for pasty solid material in hazardous waste incineration disposal process |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100374381C (en) * | 2006-06-29 | 2008-03-12 | 上海交通大学 | Method for processing organic chloride and heavy metal polluted bed mud |
-
2001
- 2001-05-28 CN CN 01108478 patent/CN1119209C/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105344698A (en) * | 2015-11-25 | 2016-02-24 | 上海绿澄环保科技有限公司 | Method for treating specific pollutants through high-temperature melting technology |
| CN105642654A (en) * | 2016-01-19 | 2016-06-08 | 青岛理工大学 | Synchronization technology of using waste heat of blast furnace slag to recycle sludge and reutilize chromic slag |
| CN105728425A (en) * | 2016-01-19 | 2016-07-06 | 青岛理工大学 | Synchronization technology of ensuring biomasses to be resourceful and chromium slag to be harmless by utilizing steel slag waste heat |
| CN105728425B (en) * | 2016-01-19 | 2018-06-26 | 青岛理工大学 | It is a kind of using steel slag waste heat recycling biomass and the simultaneous techniques of innoxious chromium slag |
| CN105728434A (en) * | 2016-02-29 | 2016-07-06 | 中南大学 | Resourceful treatment method for waste circuit board |
| CN106167343A (en) * | 2016-08-31 | 2016-11-30 | 柳州市润广科技有限公司 | A kind of municipal sludge total system |
| CN110306054A (en) * | 2018-03-20 | 2019-10-08 | 荆门市格林美新材料有限公司 | A kind of recovery method of old circuit board valuable metal |
| CN110306054B (en) * | 2018-03-20 | 2021-07-30 | 荆门格林循环电子废弃物处置有限公司 | Method for recovering valuable metals of waste circuit boards |
| CN111336520A (en) * | 2020-02-03 | 2020-06-26 | 山东清博生态材料综合利用有限公司 | Treatment method and treatment device for pasty solid material in hazardous waste incineration disposal process |
| CN111336520B (en) * | 2020-02-03 | 2022-03-29 | 山东清博生态材料综合利用有限公司 | Treatment method and treatment device for pasty solid material in hazardous waste incineration disposal process |
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| Publication number | Publication date |
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| CN1119209C (en) | 2003-08-27 |
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