CN213506768U - Dry pyrolysis gasification clean system of stroke-separating domestic waste - Google Patents

Abstract

The utility model provides a dry pyrolysis gasification clean system of stroke-separating rubbish, include: the household garbage drying device comprises a household garbage dryer, a pyrolyzer, a gasifier, a purifying device, a gas storage tank, a slag discharging device and an electric heater. The dryer is used for reducing the moisture in the household garbage; the pyrolysis device is used for pyrolyzing and producing gas from the household garbage; the gasifier is used for gasifying pyrolysis residual semicoke; the crude fuel gas purification system device is used for purifying crude fuel gas; the gas storage device is used for storing combustible gas and buffering the combustible gas, and energy required by drying and pyrolysis is provided by the electric heater. The utility model discloses environmental benefit is good, and innoxious effectual, the practicality is strong, realizes rubbish energy recycle.

Description

Dry pyrolysis gasification clean system of stroke-separating domestic waste

Technical Field

The patent of the utility model provides a system for handle domestic waste is particularly useful for resident domestic waste's processing, avoids the adjacent effect of keeping away that msw incineration brought, and the dry pyrolysis gasification of domestic waste purifies, and the gas storage utilizes.

Background

The sanitary landfill technology of the household garbage is widely adopted and plays a great role in the household garbage treatment in China. However, in the application facilities of the technology, the land occupation amount is large, the recovery is difficult, the production amount of percolate is large, the treatment cost is expensive, the stink control is difficult, the disturbance to people is serious, and the group event hidden danger related to the landfill facilities is increasingly serious in recent years.

The waste incineration technology and the process equipment mainly aim at the household waste which is mixed and collected, the heat value range is controlled to be 1000-2300 kCal/kg, and the waste incineration technology and the process equipment are widely applied to large and medium-sized cities due to obvious volume reduction and weight reduction effects. However, the technical process also has a plurality of problems, such as difficult furnace temperature stable control, too complex flue gas treatment, large total emission amount, more pollutant emission, too complex waste heat energy recovery and power generation, high requirements on the overall technical process and operation technology, and high requirements on scale, site and environment capacity.

The technology for preparing gas by pyrolyzing garbage has very high economic benefit under the condition of high environmental protection of garbage treatment, and because the structure of the garbage is changed from the molecular level by pyrolysis, the high-water content biomass garbage which is difficult to solve by an incineration method can be fully utilized (a large amount of contained cellulose can be completely pyrolyzed to prepare gas), organic matter components of the waste can be converted into an available energy form, and the economy is better; the fuel gas generated by pyrolysis and gasification can be directly combusted or mixed and combusted with other fuels with high calorific value according to the calorific value, tar generated in the reaction process can be made into fuel or extracted into chemical raw materials according to the property, and the environment-friendly characteristic of the pyrolysis process also saves a large amount of later-stage environment-friendly investment and operation cost like an incineration method; at present, the existing domestic garbage pyrolysis gasification technology at home and abroad mainly uses secondary combustion chamber combustion to replace the traditional incineration, and directly burns the generated crude gas and then treats the crude gas as incineration tail gas. Poor energy-saving and emission-reducing effects, complex process and high cost. The purification and quality improvement process for the crude fuel gas generated by direct pyrolysis and gasification of the household garbage has no forming, reliable and stable operation process technology and matched equipment in China.

According to the processing problem of pyrolysis gasification at present, adopt the gasification clean system of journey formula pyrolysis, through to domestic waste journey drying dehydration, produce combustible gas after the pyrolysis, through purifying and purifying the collection utilization of system, can avoid the production of dioxin, reach furthest and improve the utilization ratio of rubbish, produce higher energy benefit, the high calorific value gas of production can have multiple use.

SUMMERY OF THE UTILITY MODEL

The utility model provides a be used for domestic waste drying, pyrolysis, gasification, purification treatment system, through carrying out drying, pyrolysis, gasification, purification to domestic waste and put forward the matter, obtain high calorific value combustible gas, realize rubbish innoxious, resourceization, reduction treatment.

The utility model discloses a following technical scheme realizes:

the utility model provides a be used for handling domestic waste utilization of resources system, include: the household garbage drying system comprises a household garbage drying system, a pyrolysis gasification system, a fuel gas purification system, a gas storage tank and an electric heater. The household garbage enters a drying device and is used for evaporating moisture in the household garbage; the rear part of the drying device is connected with a garbage pyrolysis system device, and crude gas and semicoke are generated by anaerobic pyrolysis; then the pyrolysis residual semicoke is connected with a gasification device, and the pyrolysis residual semicoke is converted into crude fuel gas in the gasification device and is mixed with the crude fuel gas generated by pyrolysis to form crude fuel gas; then raw gas enters a purification system device for purification of combustible gas; the purification system is connected with the gas storage device and is used for storing combustible gas, and a heat source for drying and pyrolysis is provided by the electric heater. Compared with the traditional garbage pyrolysis gas production technology, after the gasification device is added in the whole technology combined system, the heat of semicoke generated by pyrolysis can be effectively utilized, the yield of raw gas and the total heat content are greatly increased, and the residue discharged by the gasification device can be directly connected with a material comprehensive utilization process device, so that the economical efficiency of garbage utilization is further improved. The utility model discloses environmental benefit is good, and innoxious effectual, the practicality is strong, realizes rubbish energy recycle.

The utility model has the main advantages that the drying, pyrolysis, gasification, purification and quality improvement are made in units, and the parameters of each part can be accurately controlled; realizing the accurate treatment of the domestic garbage according to the characteristics of the domestic garbage in China; the garbage collected by the classification system can be recycled by centralized resource treatment and can also be treated and applied in a small scale; the method has the advantages of low investment and operation cost, environmental protection, good economic benefit, strong adaptability and low project operation cost, and can realize the resource efficient utilization of combustible components in the household garbage.

Drawings

The invention is explained in further detail according to the attached system diagram.

Fig. 1 is a schematic structural diagram of a pyrolysis and gasification treatment system for waste with ultrahigh calorific value.

FIG. 1 shows, according to the drawing: 1. a garbage temporary storage box; 2. a dryer; 3. a pyrolyzer; 4. a gasifier; 5. a gas purification system; 6. a Roots blower; 7. a gas storage tank; 8. an electric heater; 9. a slag discharge device; 10. a blower.

Detailed Description

The invention will be elucidated below on the basis of an embodiment shown in the drawing.

The utility model discloses affiliated domestic waste drying pyrolysis treatment system contains domestic waste drying device: the garbage temporary storage box 1, the dryer 2 and the electric heater 7; a pyrolysis device: a pyrolyzer 3 connected to the dryer 2 and an electric heater 7; a gasification device: the gasifier 4 is connected with the pyrolyzer 3, the slag discharging device 9 and the blower 10; a purification device: and the combustible gas purification system 5 is connected with the gas storage device 7 through a Roots blower 6.

Preferably, the garbage temporary storage box 1 is used for temporary storage of garbage.

Preferably, the dryer 2 is used for evaporating moisture in the pretreated domestic garbage by using energy in the system so as to reduce the influence on the rear-end garbage treatment, and the energy required for drying is provided by an electric heater.

Preferably, the pyrolyzer 3 absorbs energy in the pyrolyzer after the dried garbage is dried, and combustible gas and semicoke are generated in an oxygen-free state to realize the chemical conversion of garbage energy.

Preferably, the gasifier 4 burns part of the combustible gas to provide a heat source in an anoxic state, and gasifies the semicoke to generate a larger amount of combustible gas; and residual garbage ash is discharged through a slag discharging device.

Preferably, the purification device 5 is used for purification treatment of combustible gas to realize purification and quality improvement of gas.

Preferably, the fan 6 is used for guiding the flow of the combustible gas.

Preferably, the gas storage tank 7 is used for storing combustible gas.

Preferably, the electric heater 8 is used for providing heat sources for the dryer and the pyrolyzer, the interior of the dryer is maintained in an environment of 200 ℃, and the pyrolyzer is maintained in an environment of 600 ℃ and 700 ℃.

When using this novel technology, with the domestic waste of preliminary treatment, it is dry to get into drying device 2 and get rid of moisture, dry rubbish after the drying passes through transmission and gets into pyrolyzer 3 reaction, produce the higher pyrolysis gas of calorific value and semicoke, fall into in vaporizer 4 through pyrolyzer transmission, air-blower 10 lets in the partial pyrolysis gas of a small amount of air combustion and supplies the heat source, gasification semicoke produces more combustible gases, after cooling down and purifying again, get into combustible gas storage device 7 through fan 6, the lime-ash passes through slag discharging device 9 and collects, dry and the energy of pyrolysis is provided by electric heater 8.

The slag generated in the process can be recycled after being treated, and can also be directly subjected to harmless landfill treatment; waste water after temporary storage, drying treatment and purification treatment of combustible gas can be discharged or recycled after treatment; the odor can be used as gasifying agent for gasification after deodorization.

The calorific value of the dried garbage can reach 2562kCal/kg, the reduction rate of pyrolysis gasification is 80 percent, the reduction volume is 90 percent, and the calorific value of each ton of garbage can reach 1314kCal/m³About 710m of combustible gas³。

The embodiments disclosed herein are to be considered in all respects as illustrative and not restrictive. The scope of the present invention is not limited to the following description of the embodiments, but is defined only by the scope of the claims, and includes all modifications having the same meaning as and within the scope of the claims.

Claims (2)

1. A split-range type domestic garbage drying, pyrolysis, gasification and purification system is characterized in that technical equipment comprises a garbage temporary storage box, a dryer, a pyrolyzer, a gasifier, a crude fuel gas purification device, a Roots blower, a gas storage tank, an electric heater and a slag discharging device; the system is as follows: the household garbage passes through the dryer from the temporary garbage storage box; the dried domestic garbage enters a pyrolyzer for pyrolysis treatment, and organic solid waste is converted into crude gas with high calorific value and semicoke; the semicoke and the crude gas enter the gasifier again to be subjected to gasification reaction with a small amount of air, and the crude gas from the gasifier is purified by a crude gas purification device; enters the gas storage tank for storage under the pressurization effect of the fan and can be used for combustion heat supply or power generation.

2. The household garbage drying, pyrolysis, gasification and purification technical system according to claim 1, wherein the pyrolysis in the pyrolyzer generates crude fuel gas and semicoke, and the crude fuel gas and the semicoke are independently collected by different devices and fed into the gasifier.

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