CN103361089A - Method for promoting kitchen garbage microwave pyrolysis with its pyrolysis residue to produce tar - Google Patents

Abstract

The invention discloses a method for promoting kitchen garbage microwave pyrolysis with its pyrolysis residue to produce tar. The method comprises: (1) subjecting kitchen garbage to a dehydration treatment, then conducting drying for 5h at 90DEG C; (2) mixing the kitchen garbage subjected to microwave pyrolysis above 500DEG C with the kitchen garbage in step (1) according to 5%-15%, then placing the mixture in a microwave pyrolysis furnace; introducing nitrogen and starting heating pyrolysis, and making the reaction proceed under an anaerobic condition; (3) passing the volatiles of the reaction through a first-level condensing device, and collecting the condensation products in a collection bottle; bringing the temperature of the kitchen garbage up to over 500DEG C, stopping pyrolysis when no gas or fluid is generated, and 5min later, letting the fluid in the collection bottle divided into two layers, with the upper layer being tar and the lower layer being a reddish brown alkalescent liquid. The method provided in the invention can accelerate the kitchen garbage microwave pyrolysis process, save electric energy effectively, and increase the tar yield. The production process involved in the invention is simple and practicable, the microwave pyrolysis residue can be recycled, and the cost is low, so that the method can be popularized.

Description

A kind of self cracked residue of utilizing promotes the remaining microwave cracking in kitchen to produce the method for tar

Technical field

The present invention relates to rubbish from cooking and produce the technique of tar, relate in particular to a kind of self cracked residue of utilizing and promote the remaining microwave cracking in kitchen to produce the method for tar.

Background technology

Along with day by day increase and the urban population expansion of China's city size, the annual emissions of domestic waste is just increasing progressively with the speed of 8-10%, and the annual emissions of China's domestic waste is above 200,000,000 tons at present.Domestic waste sharply increase has brought problems, as: restrict Sustainable development, affect waste management and pollute environment for human survival etc.In numerous municipal solid waste classifications, rubbish from cooking is maximum, often accounts for more than 50% of rubbish total amount.The rubbish from cooking that quantity is huge, not only its processing problem allows social headache endlessly, but also association the varieties of food items safety problems such as " sewer oil ", " rubbish pig ".

Rubbish from cooking is rich in organism, and water ratio is high, and is perishable, easily grows pathogenic micro-organism, mycotoxin etc.Traditional processing mode has landfill, burning, fodder processing, compost etc., but all there is certain defective in various treatment process.Microwave cracking is fast because of heat-up rate, easily control, waste reduction are effective, and the advantage such as non-secondary pollution and become rapidly the New-type refuse vehicle processing mode that numerous investigators pay close attention to.Yet, in the process of implementing microwave cracking, need to consume a large amount of electric energy.Usually, people materials such as gac, CaO as microwave absorption to accelerate rate of cleavage, still, those skilled in the art find, pulverous gac and CaO can make rubbish from cooking lump and the rate of cleavage that slows down.Moreover the cost of gac and CaO is all higher.Therefore, be badly in need of seeking a kind of microwave absorption of cheapness.

Tar is a kind of important industrial chemicals, separablely goes out multiple product, and for example how, pitch, phenol, anthracene etc., these products are widely used in the industry-by-industry producing, live.In addition, can Partial Replacement gasoline after modified by tar processed, diesel oil or kerosene, and as the raw material of engine; Tar mixes by a certain percentage with diesel oil, and the substitute that also can be used as diesel oil is used.At present, tar mainly produces in the carbonization of coal process, yet coal is Nonrenewable resources.Therefore, the approach of opening up a new manufacturing tar is necessary.

Summary of the invention

The object of the invention is to overcome the shortcoming and defect of above-mentioned prior art, provide simple, cheap self cracked residue of utilizing of a kind of technique to promote the remaining microwave cracking in kitchen to produce the method for tar.

Technical solution of the present invention is as follows:

A kind of self cracked residue of utilizing promotes the remaining microwave cracking in kitchen to produce the method for tar, adopts following steps:

(1) rubbish from cooking is carried out processed after, under 90 ℃ temperature dry 5 hours, make its water ratio＜5%;

(2) will experience that the rubbish from cooking residue of microwave cracking evenly mixes according to 5%～15% with the described rubbish from cooking of step (1) more than 500 ℃, the microwave cracking reactor of packing into, and put into the microwave cracking stove; After passing into nitrogen 20min, the beginning heating pyrolyze, and under oxygen free condition, react;

(3) with the volatile matter process one-level condensing works (cold water) of above-mentioned reaction, collect condensed product in receiving flask;

(4) incoagulable gaseous product is collected with collecting bag;

(5) temperature of rubbish from cooking is reached more than 500 ℃, stop cracking when producing without gas, liquid;

(6) stop cracking 5min clock after, the liquid in the receiving flask is divided into two-layer, the upper strata is tar, lower floor is the weakly alkaline liquid of reddish-brown, and the upper strata tar separation is gone out to pack in the oil storage bottle.

The present invention both can accelerate the rubbish from cooking microwave splits process, and effective saves energy can also increase the productive rate of tar.Reparation technology of the present invention is simple and easy to do, and the residue behind the microwave cracking can also recycle, and cost is low, can promote the use of.

Description of drawings

Fig. 1 is process flow sheet of the present invention.

Embodiment

Below in conjunction with specific embodiment the present invention is done further concrete detailed description the in detail.

Embodiment 1:

The rubbish from cooking residue of microwave cracking more than 500 ℃ has been experienced in collection, and the rubbish from cooking of drying is evenly mixed with the residue of its quality 5%, and the microwave cracking reactor of packing into is put into the microwave cracking stove.After passing into 20min nitrogen, open the microwave cracking stove, the size of microwave power is the 13.33W/g setting according to its ratio with rubbish from cooking.Powered-down during substantially without gas, liquid generation.In the cracking process, the top temperature of rubbish from cooking is 686 ℃, and the microwave cracking furnaceman is 11.00min as the time, and the yield of the relative rubbish from cooking of tar is 19.70%, the yield that produces the relative rubbish from cooking of carbon residue is 42.80%, and the yield that produces the relative rubbish from cooking of inflammable gas is 21.10%.Situation when not adding residue, top temperature has increased by 4.10%, has consuming timely reduced 12.00%, and the tar yield has reduced 0.60%, and the carbon residue yield increases by 7.27%, and the inflammable gas yield reduces 7.63%.

Embodiment 2:

The ratio of the present embodiment residue is 10%.The rubbish from cooking top temperature is 717 ℃ in the cracking process, the microwave cracking furnaceman is 5.20min as the time, the yield of the relative rubbish from cooking of tar is 20.70%, and the yield that produces the relative rubbish from cooking of carbon residue is 33.30%, and the yield that produces the relative rubbish from cooking of inflammable gas is 29.23%.Situation when not adding residue, top temperature has increased by 8.80%, has consuming timely reduced 58.40%, and the tar yield has increased by 0.40%, and the carbon residue yield reduces 2.23%, and the inflammable gas yield increases by 0.50%.

Embodiment 3:

The ratio of the present embodiment residue is 15%.The rubbish from cooking top temperature is 732 ℃ in the cracking process, the microwave cracking furnaceman is 5.90min as the time, the yield of the relative rubbish from cooking of tar is 21.30%, and the yield that produces the relative rubbish from cooking of carbon residue is 32.13%, and the yield that produces the relative rubbish from cooking of inflammable gas is 29.33%.Situation when not adding residue, top temperature has increased by 11.08%, has consuming timely reduced 52.80%, and the tar yield has increased by 1.00%, and the carbon residue yield reduces 3.40%, and the inflammable gas yield increases by 0.60%.

Embodiment 4:

The present embodiment microwave power is reduced to 10W/g.The rubbish from cooking top temperature is 669 ℃ in the cracking process, the microwave cracking furnaceman is 14.10min as the time, the yield of the relative rubbish from cooking of tar is 22.70%, and the yield that produces the relative rubbish from cooking of carbon residue is 35.53%, and the yield that produces the relative rubbish from cooking of inflammable gas is 23.33%.With respect to not adding residue, situation when power is 13.33W/g, top temperature has increased by 1.52%, has consuming timely increased by 12.80%, and power consumption reduces 15.40%, and the tar yield has increased by 1.40%, and the carbon residue yield is constant, and the inflammable gas yield reduces 5.40%.

The residue of gained can recycle in above-described embodiment.

Embodiments of the present invention are not restricted to the described embodiments; other are any not to deviate from change, the modification done under spirit of the present invention and the principle, substitute, combination, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.

Claims (1)

1. one kind is utilized self cracked residue to promote the remaining microwave cracking in kitchen to produce the method for tar, it is characterized in that following steps:

(1) rubbish from cooking is carried out processed after, under 90 ℃ temperature dry 5 hours, make its water ratio＜5%;

(2) will experience that the rubbish from cooking residue of microwave cracking evenly mixes according to 5%～15% with the described rubbish from cooking of step (1) more than 500 ℃, the microwave cracking reactor of packing into, and put into the microwave cracking stove; After passing into nitrogen 20min, the beginning heating pyrolyze, and under oxygen free condition, react;

(3) with the volatile matter process one-level condensing works of above-mentioned reaction, collect condensed product in receiving flask;

(4) incoagulable gaseous product is collected with collecting bag;

(5) temperature of rubbish from cooking is reached more than 500 ℃, stop cracking when producing without gas, liquid;

(6) stop cracking 5min clock after, the liquid in the receiving flask is divided into two-layer, the upper strata is tar, lower floor is the weakly alkaline liquid of reddish-brown, and the upper strata tar separation is gone out to pack in the oil storage bottle.

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