CN201289090Y

CN201289090Y - Flyash combustible recycling and dioxin pollution removing device

Info

Publication number: CN201289090Y
Application number: CNU2008201541014U
Authority: CN
Inventors: 王中
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-10-16
Filing date: 2008-10-16
Publication date: 2009-08-12
Anticipated expiration: 2018-10-16

Abstract

The utility model relates to the technical field of incineration for domestic waste and treatment for electricity-generation flying ash. The flying ash combustible matter recycling and dioxin pollution removing device of the utility model comprises a flying ash re-circulating pipeline, a compressed air or wind pipeline and a re-circulating flying ash bin, wherein one end of the flying ash re-circulating pipeline is extended into the hearth of a waste incinerating boiler and the other end thereof is connected with the re-circulating flying ash bin, the compressed air or wind pipeline is set near to the joint of the flying ash re-circulating pipeline and the re-circulating flying ash bin, and the re-circulating flying ash bin is connected with a flue gas purifier for collection of flying ash. The utility model burns the flying ash input to the hearth at a high temperature in an oxidative manner, the released heat quantity is absorbed by a residual heat boiler, such that the volume of the flying ash is decreased; dioxin is incinerated and decomposed at the high temperature, pharmaceutical product calcium hydroxide is reacted with HCl produced in the process of incinerating wastes to reduce original concentration of HCl, so as to reduce the possibility of synthesising dioxin in the flue gas of boiler and to reduce the pharmaceutical product of flue gas purifier and dosage of active carbon.

Description

A kind of fly ash combustible material utilizes and removes the device of dioxin contamination again

Technical field

The utility model relates to domestic garbage burning electricity generation flying dust disposal technology field.

Background technology

Burning city domestic garbage generating has become the important technical of consumer waste innocent, minimizing, recycling treatment in more developed country, the world, in this technology of China also among vigorous growth.The flue gas that is rich in pollutant that waste incineration produces is handled through smoke eliminator, and dioxin and heavy metal are entered the flying dust processing by charcoal absorption, sour gas after with the calcium hydroxide neutralization reaction.Flying dust is cured with the cement and the agent that boils together and delivers to hazardous waste landfill yard landfill disposal.Percolate is owing to organic concentration height, the high discharge standard that is difficult to reach by biochemical treatment country of ammonia-nitrogen concentration, by to the coagulation of percolate, press filtration, add behind the deodorant as the garbage-incineration smoke purifying process water again, utilize the waste heat of flue gas to make water become steam and enter atmosphere, organic matter, heavy metal enter flying dust and do to solidify with flying dust and bury processing in the percolate.This technology has not only solved the difficult problem that pollutes water body of percolate of high organic concentration, has also saved cost and using water wisely simultaneously.

The list of references of correlation technique is as follows:

1, the 24th No. 36 P451 patent No. ZL200720076343.1. Granted publication CN201109735y of State Intellectual Property Office of the People's Republic of China's Patent Gazette for Utility Models in 2008 novel consumer waste infiltration liquid harmless treatment device.

2, No. 31132 P235-P276 of Chemical Industry Press's Environmental Science and Engineering publishing centre Zhang Yi, Zhao Youcai chief editor " consumer waste incineration technology " ISBN7-5025-2894-6 China's depository library CIP data core word (2000).

3, teaching material Lee of institution of higher education of publishing house of Southeast China University tradition J.-D Herbell etc. writes No. 201477 P418-P494 of " modern solid waste comprehensive treatment technique " ISBN978-7-5641-0866-3 China's depository library CIP data core word (2007).

Above-mentioned disclosed technology has following deficiency on engineering is used:

1, contains combustible more than 25% in the flying dust, be rich in lot of energy and be not utilized and be used as hazardous waste and handle.Combustible mainly is larger molecular organics that stays behind the percolate sewage evaporate to dryness and the active carbon that adsorbs dioxin.Combustible is handled as hazardous waste has not only increased the flying dust cost of disposal, has also wasted energy resource simultaneously, has taken land resource.

2, the calcium hydroxide medicament that contains in the flying dust more than 20% is not used effectively, and this has not only increased the consumption of medicament, has increased the cost of disposal of gas cleaning and flying dust simultaneously yet, waste land resource.

3, contain the disposal difficulty that a large amount of dioxin has increased flying dust in the flying dust, the existence of dioxin will threaten environment structure all the time.

Summary of the invention

The purpose of this utility model is exactly in order to overcome the deficiencies in the prior art, the content of dioxin and combustible, calcium hydroxide medicament in the minimizing flying dust, fully recover energy and medicament, reduce the amount of hazardous waste, thereby reduce the cost of disposal of flying dust, reduce the threat of flying dust, economize the land resource environment.

It is as follows that the utility model solves this technical problem the technical scheme that is adopted:

A kind of fly ash combustible material utilizes and removes the device of dioxin contamination again, comprise flying dust recirculating line, compressed air or air pipe line, recirculation flying dust storehouse, wherein an end of flying dust recirculating line stretches into the garbage burning boiler burner hearth, the other end is connected with recirculation flying dust storehouse, and compressed air or air pipe line are located at the flying dust recirculating line and are recycled near the junction in flying dust storehouse; Recirculation flying dust storehouse is connected with fume dust remover, collects flying dust.

Above-mentioned fly ash combustible material utilizes and removes the device of dioxin contamination again, and its compressed air or air pipe line are connected with air compressor or blower fan, also can be connected with compressed air or the air pipe line in the refuse burning system.

Fly ash combustible material of the present utility model utilizes and removes the device of dioxin contamination again by flying dust recirculating line and recirculation flying dust storehouse, the flying dust that fume dust remover is collected is transported to and carries out the high-temperature oxydation burning in the garbage burning boiler burner hearth, carry out flying dust and go into the stove circulation, the flying dust that this moment, flue gas purification system was collected is separately done the curing landfill disposal again.

The beneficial effects of the utility model are: flying dust oxidizing fire in 850-1100 ℃ high temperature of input burner hearth, and the combustible burning is emitted energy and is absorbed by waste heat boiler, and volume reduces.Dioxin is at high temperature burned decomposes the purpose that reaches harmless treatment.The HCL reaction that calcium hydroxide medicament and waste incineration produce in burner hearth generates CaCL ₂, reduce the original concentration of HCL, thereby in boiler, reduced the meeting of dioxin synthesizer, reduced the original concentration of dioxin, reduced the consumption of smoke eliminator medicament and active carbon simultaneously.This plant investment is few, and system is simple and reliable, and is easy to operate, consuming little energy.

Description of drawings

Below in conjunction with accompanying drawing 1 and specific embodiment the utility model is further specified

Fig. 1 is the device schematic diagram that the utility model fly ash combustible material utilized and removed dioxin contamination again

Label declaration:

1, burner hearth 2, waste heat boiler 3, flying dust recirculating line 4, recirculation flying dust storehouse

5, flying dust storehouse 6, compressed air or air pipe line 7, quench tower (reaction tower)

8, fume dust remover 9, air-introduced machine 10, chimney

The specific embodiment

As shown in Figure 1, the device that fly ash combustible material described in the utility model utilized and removed dioxin contamination again comprises flying dust recirculating line 3, compressed air or air pipe line 6 and recirculation flying dust storehouse 4, wherein an end of flying dust recirculating line 3 stretches into garbage burning boiler burner hearth 1, the other end is connected with recirculation flying dust storehouse 4, and compressed air or air pipe line 6 are located at flying dust recirculating line 3 and are recycled near the junction in flying dust storehouse 4; Recirculation flying dust storehouse 4 is connected with fume dust remover 8, collects flying dust.

Its operation principle is: after percolate is sprayed in the smoke eliminator quench tower (reaction tower) 7, the flying dust collection is left in the recirculation flying dust storehouse 4, and the wind that produces with compressed air or blower fan is conveyed into garbage burning boiler burner hearth 1 with the flying dust fluidisation by flying dust recirculating line 3 by compressed air or air pipe line 6.The flue gas dust collecting system water should be switched to general industrial water from percolate when dropping into the flying dust EGR, the active carbon that is rich in the larger molecular organics of energy and is rich in dioxin in burner hearth at high temperature burns and emits heat and absorbed by waste heat boiler, dioxin decompose realize innoxious.HCL, HF, SO that the calcium hydroxide medicament produces with waste incineration ₂Neutralization reaction takes place, and also to emit energy be that waste heat boiler absorbs, thereby the content that has reduced the HCL in the boiler smoke has reduced the generation chance of dioxin, and flue gas dust collecting system in this process is because the flue gas middle acid substance reduces dosage can correspondingly reduce.The flying dust that this moment, flue gas dust collecting system was collected directly deposits in does follow-up curing landfill disposal in the flying dust storehouse 5.Realize the utilization again of fly ash combustible material and calcium hydroxide medicament, reduced dioxin contamination, reduced the amount that flying dust is disposed, thereby reduced the flying dust cost of disposal, saved valuable land resource.

Claims

1. a fly ash combustible material utilizes and removes the device of dioxin contamination again, it is characterized in that: comprise flying dust recirculating line (3), compressed air or air pipe line (6) and recirculation flying dust storehouse (4), wherein an end of flying dust recirculating line (3) stretches into garbage burning boiler burner hearth (1), the other end is connected with recirculation flying dust storehouse (4), and compressed air or air pipe line (6) are located at flying dust recirculating line (3) and are recycled near the junction in flying dust storehouse (4); Recirculation flying dust storehouse (4) is connected with fume dust remover (8), collects flying dust.

2. fly ash combustible material as claimed in claim 1 utilizes and remove the device of dioxin contamination again, it is characterized in that: said compressed air or air pipe line (6) are connected with air compressor or blower fan.