CN100363118C

CN100363118C - Refuse flying ash stabilizing treatment

Info

Publication number: CN100363118C
Application number: CNB2005100300859A
Authority: CN
Inventors: 韩国治; 王正达; 宰正浩; 阮仁勇
Original assignee: SHANGHAI HUANBAO SLAG INDUSTRY DISPOSAL Co Ltd
Current assignee: SHANGHAI HUANBAO SLAG INDUSTRY DISPOSAL Co Ltd
Priority date: 2005-09-28
Filing date: 2005-09-28
Publication date: 2008-01-23
Anticipated expiration: 2025-09-28
Also published as: CN1745915A

Abstract

The present invention relates to a stabilizing treatment process method for flying ash generated by burning domestic refuse. The present invention is a treatment process method that the flying ash is collected by a dry method and loads a tank transporting vehicle, and is transported to a treating place after the domestic refuse is burnt; the flying ash in a tank is extruded by an equipped air compressor, is mixed with chelating agent which is conveyed by a liquid pipline of the other inlet of an injector mixer, and directly sprays in the landfill pit for landfill. The present invention greatly simplifies the process of the prior art, combines transportation and unloading of the flying ash and treatment of the flying ash, improves operating efficiency, saves space for a treating landfill pit and greatly reduces cost. The present invention uses a method that the gas and the liquid are mutually mixed and stirred, basically solves the problem of ash for flying in a landfill pit, and protects environment.

Description

A kind of refuse flying ash stabilizing treatment

Technical field:

The present invention relates to a kind of processing method of domestic garbage incineration flyash, refer to a kind of refuse flying ash stabilizing treatment especially.

Background technology:

The flue gas of house refuse through being produced after the incineration disposal; according to the provisions of the relevant regulations issued by the State is directly to discharge in atmosphere; need will to contain the flying dust that comprises various poisonous and harmful elements and capture, gas purification could be discharged after up to standard through flue gas purification system, not contaminated to guarantee environment.Because the flying dust that is captured down in the purification process contains heavy metal, harmful organic substance, for example dioxin, furans etc., and other nuisance, so flying dust belongs to danger wastes, needs dispose especially according to the national compulsory regulation.

State compulsion regulation, the principle of disposing for flying dust be, carrying out finally giving landfill after innoxious, stabilization treatment makes that oozing out toxicity in the flying dust meets standard.

In the prior art, traditional stabilization technology generally adopts the method for cement solidification, technology is as follows: with the incineration plant flying dust flying dust groove tank car of packing into, be transported near the flying dust warehousing storage landfill factory, by proportioning with cement and flying dust measure cooperate after, utilize mechanical stirring device to stir, will go into to cheat landfill through the flying dust of stabilization processes by means of transports such as forklifts again.The basic principle of above-mentioned cement solidification is by the surface area that solidify to contain reduces harmful waste and reduces its permeability, reaches stabilisation, innoxious purpose.The mode that adopts chelating agent is also arranged in addition, chemically integrate toxic substance relevant in the flying dust, give landfill after reaching the purpose of stabilisation.Said method all adopts the churned mechanically facility of a cover at least, with the flying dust for preparing or chelating agent by after stirring facility and fully stirring, deliver to waste pit through conveying, transporting equipment, utilize said method, also need corresponding outfit storage facilities, in order to accept and to store flying dust and cement or chelating agent, therefore all need carry out above-mentioned operation in the peripheral supporting outfit stabilisation workshop of waste pit for adopting traditional approach to dispose flying dust.

Summary of the invention:

Technical problem to be solved by this invention just is to overcome deficiency of the prior art, a kind of mechanical agitation that need not is provided, need not to be equipped with warehousing storage, stabilisation workshop, and the mode that adopts gas, liquid to mix mutually, adopt gas to carry flying dust, after the mutual hybrid reaction of chelating agent, the process that directly enters waste pit stabilization treatment domestic garbage incineration flyash.

Concrete scheme provided by the invention is as follows:

A kind of refuse flying ash stabilizing treatment is packed the incineration plant flying dust behind the flying dust groove tank car into, directly is transported to waste pit, extrude flying dust with air compressor, with injector mixer 6 ejection flying dust and chelating agents, hybrid reaction directly enters the waste pit stabilization treatment mutually;

Described injector mixer 6 comprises ash conveying pipe 1, fluid pipeline 2, diffusion pipeline 4, jet head 5;

The flying dust that described air compressor extrudes, by ash conveying pipe 1,4 ejections of diffusion pipeline, the mutual hybrid reaction of chelating agent with through fluid pipeline 2, jet head 5 ejections directly enters the waste pit stabilization treatment.

Described injector mixer 6 comprises the pipe blow-through 3 that is connected with fluid pipeline 2, is treating duty, can be so that to the cleaning of fluid pipeline 2.

Above-mentioned flying dust is 18～25 meter per seconds in the speed of ash conveying pipe 1.

Above-mentioned flying dust is 18～25 meter per seconds by the muzzle velocity of diffusion pipeline 4 ejections.

Above-mentioned chelating liquid is 30～35 meter per seconds by the muzzle velocity of jet head 5 ejections.

The weight proportion of above-mentioned flying dust, chelating liquid is 1: 0.25～0.35.

The chelating liquid of above-mentioned employing is selected getting final product of prior art for use.

Through the flying dust of stabilization treatment of the present invention, reach the standard that national danger wastes landfill is gone into the hole, compared with prior art, the remarkable result that has is as follows:

1, the present invention has simplified the technology of prior art greatly, makes the transportation of flying dust unload and combines with the disposal of flying dust, improves operating efficiency, saves disposal costs.

2, the present invention adopts chelating agent to stablize the flying dust technology, compares with adopting the cement stabilizing method, has saved the space of disposing waste pit, greatly reduces cost.

3, the present invention can go into to cheat requirement according to different flying dusts, adjusts the proportioning of chelating agent, and it is more reasonable that the flying dust that makes waste pit go into the hole is disposed, and economy is efficient.

4, the present invention adopts gas, liquid to mix stirring method mutually, has solved the problem of waste pit field dirt at all, has protected environment.

Description of drawings:

Fig. 1 is the structural representation of injector mixer.

The specific embodiment:

Embodiment 1:

At first adopt conventional method, with the incineration plant flying dust flying dust groove tank car of packing into, directly be transported to flying dust and dispose waste pit, opening groove tank car compressor by the thermopnore at the bottom of the jar, makes a jar interior flying dust be suspended state, adjust jar internal gas pressure control flying dust in ash conveying pipe speed at 18～25 meter per seconds, open ash output valve, make the suspension flying dust be forced out tank body through ash conveying pipe 1, enter ad hoc ash, liquid injector mixer 6 in company with air-flow.

As shown in Figure 1, described injector mixer 6 comprises ash conveying pipe 1, fluid pipeline 2, the pipe blow-through 3 that is connected with fluid pipeline 2, diffusion pipeline 4, jet head 5; The flying dust that described air compressor extrudes, by ash conveying pipe 1,4 ejections of diffusion pipeline, with the mutual hybrid reaction of chelating agent through fluid pipeline 2, jet head 5 ejections, chelating liquid is 30～35 meter per seconds by the muzzle velocity of jet head ejection, and the weight proportion of above-mentioned flying dust, chelating liquid is 1: 0.25～0.35; Directly enter the waste pit stabilization treatment.

The present invention takes gas to carry flying dust and chelating liquid liquid to intersect and produces collision, utilizes flow stream velocity greater than the absorption affinity that air velocity produces, and flying dust, chelating liquid are mixed fully, reaches the effect that stirs.

Chelating agent addition and selection are decided according to concrete needs, exceed standard with heavy metal substances such as lead in the common flying dust, select for use phosphate as chelating agent.In the process that flying dust is handled, the phosphate of generation has long-term geologic chemistry stability, can effectively control flying dust and include the heavy metal dissolubility, especially at lead.

Through the flying dust after above-mentioned the mixing, directly enter waste pit, the flying dust humidity that enters waste pit is controlled at 25%～35% and can suppresses the airborne dust that flying dust produces, and because the radius of spray of injector mixer jet head is greater than the flying dust radius of spray, the reentrainment of dust of flying dust guarantees the environmental sanitation and the safety in operation place with this after having prevented to land.

To sum up, adopt disposing technique method of the present invention, compare with traditional flying dust method of disposal, have following advantage:

1, comprise and reduce the volume take waste pit, flying dust disposal costs per ton reduce 30% with On.

2, calculate to dispose 30,000 tons of flying dusts every year, save 300～5,000,000 yuan of disposal site construction costs.

3, the flying dust disposing technique is easy, and is efficient, can increase substantially the specific yield of disposal.

4, the airborne dust problem of establishment disposal site.

Claims

1. refuse flying ash stabilizing treatment, the incineration plant flying dust is packed into behind the flying dust groove tank car, directly be transported to waste pit, it is characterized in that: extrude flying dust with air compressor, with injector mixer (6) ejection flying dust and chelating agent, hybrid reaction directly enters the waste pit stabilization treatment mutually;

Described injector mixer (6) comprises ash conveying pipe (1), fluid pipeline (2), diffusion pipeline (4), jet head (5);

The flying dust that described air compressor extrudes is by ash conveying pipe (1), diffusion pipeline (4) ejection, with the mutual hybrid reaction of chelating agent through fluid pipeline (2), jet head (5) ejection.

2. stabilization treatment process according to claim 1 is characterized in that, described injector mixer (6) comprises the pipe blow-through (3) that is connected with fluid pipeline (2).

3. stabilization treatment process according to claim 1 is characterized in that, described flying dust is 18～25 meter per seconds in the speed of ash conveying pipe (1).

4. stabilization treatment process according to claim 1 is characterized in that, described flying dust is 18～25 meter per seconds by the muzzle velocity of diffusion pipeline (4) ejection.

5. stabilization treatment process according to claim 1 is characterized in that, described chelating agent is 30～35 meter per seconds by the muzzle velocity of jet head (5) ejection.

6. stabilization treatment process according to claim 1 is characterized in that, the weight proportion of described flying dust, chelating agent is 1: 0.25～0.35.