CN201396766Y - Flue gas recirculation and low-position waste heat energy reutilization device for garbage incinerator - Google Patents

Flue gas recirculation and low-position waste heat energy reutilization device for garbage incinerator Download PDF

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Publication number
CN201396766Y
CN201396766Y CN2009200731317U CN200920073131U CN201396766Y CN 201396766 Y CN201396766 Y CN 201396766Y CN 2009200731317 U CN2009200731317 U CN 2009200731317U CN 200920073131 U CN200920073131 U CN 200920073131U CN 201396766 Y CN201396766 Y CN 201396766Y
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CN
China
Prior art keywords
flue gas
gas recirculation
incinerator
heat energy
low
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CN2009200731317U
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Chinese (zh)
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王中
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王中
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Priority to CN2009200731317U priority Critical patent/CN201396766Y/en
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Publication of CN201396766Y publication Critical patent/CN201396766Y/en

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Abstract

The utility model discloses a flue gas recirculation and low-position waste heat energy reutilization device for a garbage incinerator, which comprises a flue gas recirculation pipeline, a flue gas recirculation dust remover and a flue gas recirculation suction blower, wherein, one end of the flue gas recirculation pipeline is connected to the flue gas outlet of the garbage incinerator, two branchpipes are arranged at the other end thereof and connected to the drying zone air room and the burnout zone air room of the garbage incinerator respectively, and the flue gas recirculation dust remover and the flue gas recirculation suction blower are arranged in sequence in the flue gas recirculation pipeline. The device provided by the utility model can be used for replacing high-temperature primary air, drying damp garbage, supplying oxygen for residual carbon combustion at the burnout zone and recycling heat energy produced by high-temperature slag, thereby achieving the purpose of makinguse of low-position waste heat energy from flue gases by means of flue gas recirculation. Moreover, the utility model has the advantages of low cost, easy field layout, simple and reliable system, andconvenient operation.

Description

A kind of flue gas of garbage furnace recirculation low level waste thermal energy re-use device

Technical field

The utility model relates to the garbage incineration technology field, the device that particularly a kind of waste incineration and generating electricity energy utilizes again.

Background technology

The burning city domestic garbage generating has become the important technical of consumer waste innocent, minimizing, recycling treatment in more developed country, the world, waited until widely in the nearly more than ten years based on the waste incineration and generating electricity technology of grate furnace and used.General waste incineration grate furnace is divided into dry section, combustion zone, burning-out zone, all is with a wind supply of high temperature.In order to adapt to high-moisture, low-calorie rubbish, reduce the consumption of expensive auxiliary fuel, reduce cost, people have invented and have used the Steam Heating air, promptly steam pre-device technology, be transported to the dry section air compartment with the air after the heating, the rubbish oven dry of humidity is burned again,, reduce the generation of pollutant to guarantee that rubbish burns under sufficiently high temperature.But during in the face of the high rubbish of some complicated components, moisture content, because of moisture height, HCl content height,, often design higher exhaust gas temperature in the flue gas of incinerator for fear of the long-pending corrosion boiler heating surface that reveals, generally about 200 ℃-230 ℃, will cause the thermal efficiency of incinerator to reduce like this.Simultaneously, the low level used heat of existing waste incineration and generating electricity flue gas does not obtain well utilizing again, in some new technologies, the useless flue gas of useful extraction tail flue gas purifying dust-removing device outlet is made part secondary wind and is used, thereby part is utilized the energy of flue gas, reduce the consumption of air, reduce the generation of pollutant, improve the overall thermal efficient of incinerator.

In the existing disclosed document, as:

1, No. 31132 P91-P125 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);

2, teaching material Lee of institution of higher education of publishing house of Southeast China University tradition J.-D Herbell etc. writes No. 201477 P157-P168 of " modern solid waste comprehensive treatment technique " ISBN 978-7-5641-0866-3 China's depository library CIP data core word (2007).

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

1, do not have flue gas recirculation low level waste heat utilization system, the incinerator thermal efficiency is low, and economic effect is poor;

2, flue gas recirculation heat energy utilization system, owing to extract flue gas from the outlet of tail flue gas purifying dust-removing device, the flue gas that incinerator produces is lowered the temperature through quench tower, available heat energy reduces, the heat energy utilization deficiency;

3, the flue gas recirculation hot flue gas that utilizes energy system to extract is delivered to incinerator and is used as part secondary wind, because the oxygen content of flue gas has only about 7-12%, compare much lowerly with the oxygen content 21% of air, can reduce the intensity of waste incineration like this, reduce the waste incineration temperature;

4, extract the high-order energy of steam that the dry moist rubbish of Steam Heating air needs consume valuable, reduced generated energy, influenced the economic benefit of garbage incinerating power plant;

5, with hot-air convection drying rubbish, because the content height of oxygen in the air, rubbish is caught fire in advance at dry section, the combustion intensity and the incineration temperature of combustion zone have been reduced, pollutant generates the concentration height, influences the safe operation of incineration furnace grate simultaneously and causes the waste incineration tempering to influence site safety easily and carry out production strictly in line with rules and regulations;

6, existing flue gas recirculation heat energy utilization system, owing to extract flue gas from the outlet of tail flue gas purifying dust-removing device, actual field arranges that the airduct road need pass whole flue gas purification system, pipeline is oversize, difficult arrangement, investment is big.

The utility model content

The purpose of this utility model is exactly in order to overcome the deficiencies in the prior art, utilizes the Lowlevel thermal energy in the useless flue gas that waste incineration produces, and improves the recycling efficient of waste incineration capacity of furnace, reduce the consumption of air, reduce the generation of pollutant, reach the purpose of energy-saving and emission-reduction, increase economic efficiency.

In order to achieve the above object, the technical scheme that the utility model adopted is as follows:

A kind of flue gas of garbage furnace recirculation low level waste thermal energy re-use device, comprise that flue gas recirculation pipeline, flue gas recirculation deduster and flue gas recirculation extract blower fan, described incinerator has dry section air compartment, burning-out zone air compartment and exhanst gas outlet, one end of described flue gas recirculation pipeline is connected with the exhanst gas outlet of described incinerator, the other end has two arms and is connected to the dry section air compartment and the burning-out zone air compartment of described incinerator respectively, and described flue gas recirculation deduster and flue gas recirculation extract blower fan and be arranged in the flue gas recirculation pipeline.

The beneficial effects of the utility model are: flue gas of garbage furnace recirculation Lowlevel thermal energy re-use device of the present utility model, the hot flue gas that the flue gas of garbage furnace outlet is produced removes dust with deduster, and be transported to incinerator dry section air compartment and burning-out zone air compartment with the extraction blower fan, thereby replace wind of high temperature, dry moist rubbish, the heat energy that provides burning-out zone carbon residue to burn and use oxygen and reclaim high temperature furnace slag reach the purpose of utilizing the low level waste thermal energy of flue gas by flue gas recirculation.Because what dry moist rubbish needed mainly is heat, do not need oxygen content, when rubbish is done, a wind crossing rich oxygen content causes rubbish to catch fire in advance easily, reduced the combustion intensity and the incineration temperature of combustion zone, pollutant generates the concentration height, influences the safe operation of incinerator, and hot flue gas just in time has enough heats, and low oxygen content makes rubbish be not easy to catch fire at dry section; And the carbon residue in the unburnt slag of burning-out zone only needs oxygen amount seldom, and bigger heat convection air quantity is taken away the heat of high temperature furnace slag.Thereby available waste heat flue gas substituting disposable wind, can reduce the consumption of air, optimize the combustion position in the stove, reduce the generation of pollutant, improve the energy utilization efficiency of incinerator, reduced the capacity and the power consumption of primary air fan, air-introduced machine, reduced the volume and the investment of steaming pre-device, because the exhaust gas volumn of flue gas of garbage furnace outlet reduces, and can save the process water of quench tower (tower of promptly lowering the temperature); And this installation cost is low, and on-the-spot layout is easy, and system is simple and reliable, and is easy to operate.

Description of drawings

For clearlyer understanding the purpose of this utility model, characteristics and advantage, below with reference to accompanying drawing preferred embodiment of the present utility model is described in detail, wherein:

Fig. 1 is the utility model flue gas recirculation low level waste thermal energy re-use device schematic diagram.

Description of reference numerals:

1, incinerator burner hearth 2, waste heat boiler 3, flue gas recirculation pipeline 4, flue gas recirculation deduster

5, flue gas recirculation extracts blower fan 6, dry section air compartment 7, combustion zone air compartment 8, burning-out zone air compartment

9, quench tower (tower of promptly lowering the temperature) 10, gas cleaning deduster 11, air-introduced machine 12, chimney

13, exhanst gas outlet

The specific embodiment

See also Fig. 1, the hot flue gas recirculation low level of incinerator of the present utility model waste thermal energy re-use device comprises flue gas recirculation pipeline 3, flue gas recirculation deduster 4 and flue gas recirculation extract blower fan 5, incinerator has dry section air compartment 6, burning-out zone air compartment 8 and exhanst gas outlet 13, one end of flue gas recirculation pipeline 3 is connected with the exhanst gas outlet 13 of incinerator, the other end has two arms and is connected to the dry section air compartment 6 and the burning-out zone air compartment 8 of incinerator respectively, and flue gas recirculation deduster 4 and flue gas recirculation extract blower fan 5 and be arranged in the flue gas recirculation pipeline 3.

Further, be initial with exhanst gas outlet 13, flue gas recirculation deduster 4 extracts blower fan 5 with flue gas recirculation and is successively set in the flue gas recirculation pipeline 3.

Wherein, incinerator burner hearth 1, waste heat boiler 2, combustion zone air compartment 7, quench tower 9 (tower of promptly lowering the temperature), gas cleaning deduster 10, air-introduced machine 11 and chimney 12 are the equipment in the existing refuse burning system, so repeat no more.

Flue gas of garbage furnace recirculation Lowlevel thermal energy re-use device of the present utility model, the hot flue gas that flue gas of garbage furnace outlet 13 is produced removes dust with flue gas recirculation deduster 4, and extract blower fan 5 with flue gas recirculation and be transported to incinerator dry section air compartment 6 and burning-out zone air compartment 8, thereby replace wind of high temperature, the rubbish of drying humidity, the heat energy that provides the burning-out zone burning to use oxygen and recovery high temperature furnace slag reach flue gas recirculation and the purpose of utilizing the low level waste thermal energy of flue gas.

Claims (2)

1. a flue gas of garbage furnace recycles low level waste thermal energy re-use device, it is characterized in that: comprise the flue gas recirculation pipeline, flue gas recirculation deduster and flue gas recirculation extract blower fan, described incinerator has the dry section air compartment, burning-out zone air compartment and exhanst gas outlet, one end of described flue gas recirculation pipeline is connected with the exhanst gas outlet of described incinerator, the other end has two arms and is connected to the dry section air compartment and the burning-out zone air compartment of described incinerator respectively, and described flue gas recirculation deduster and flue gas recirculation extract blower fan and be arranged in the flue gas recirculation pipeline.
2. flue gas of garbage furnace recirculation low level waste thermal energy re-use device according to claim 1, it is characterized in that: the exhanst gas outlet with described incinerator is initial, and described flue gas recirculation deduster and flue gas recirculation extract blower fan and be successively set in the flue gas recirculation pipeline.
CN2009200731317U 2009-05-31 2009-05-31 Flue gas recirculation and low-position waste heat energy reutilization device for garbage incinerator CN201396766Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2009200731317U CN201396766Y (en) 2009-05-31 2009-05-31 Flue gas recirculation and low-position waste heat energy reutilization device for garbage incinerator

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Application Number Priority Date Filing Date Title
CN2009200731317U CN201396766Y (en) 2009-05-31 2009-05-31 Flue gas recirculation and low-position waste heat energy reutilization device for garbage incinerator

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CN201396766Y true CN201396766Y (en) 2010-02-03

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101943409A (en) * 2010-09-26 2011-01-12 安徽金鼎锅炉股份有限公司 Garbage incinerator
CN102966956A (en) * 2012-11-13 2013-03-13 江苏欣润环境科技发展有限公司 Three-section type Martin grate garbage incinerator
CN104141958A (en) * 2014-08-20 2014-11-12 上海康恒环境股份有限公司 Tail flue gas afterheat recycling system of mechanical waste incineration grate boiler and automatic control method thereof
CN104896482A (en) * 2015-06-24 2015-09-09 天津机电进出口有限公司 Smoke circulating combusting system for waste palm boiler
CN109028092A (en) * 2018-06-15 2018-12-18 上海锅炉厂有限公司 A kind of series coupled electricity generation system using fossil fuel Yu oxygen-enriched combusting rubbish
CN109028093A (en) * 2018-06-15 2018-12-18 上海锅炉厂有限公司 A kind of multipaths coupled electricity-generation system using fossil fuel Yu oxygen-enriched combusting rubbish

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101943409A (en) * 2010-09-26 2011-01-12 安徽金鼎锅炉股份有限公司 Garbage incinerator
CN101943409B (en) * 2010-09-26 2012-11-14 安徽金鼎锅炉股份有限公司 Garbage incinerator
CN102966956A (en) * 2012-11-13 2013-03-13 江苏欣润环境科技发展有限公司 Three-section type Martin grate garbage incinerator
CN104141958A (en) * 2014-08-20 2014-11-12 上海康恒环境股份有限公司 Tail flue gas afterheat recycling system of mechanical waste incineration grate boiler and automatic control method thereof
CN104896482A (en) * 2015-06-24 2015-09-09 天津机电进出口有限公司 Smoke circulating combusting system for waste palm boiler
CN109028092A (en) * 2018-06-15 2018-12-18 上海锅炉厂有限公司 A kind of series coupled electricity generation system using fossil fuel Yu oxygen-enriched combusting rubbish
CN109028093A (en) * 2018-06-15 2018-12-18 上海锅炉厂有限公司 A kind of multipaths coupled electricity-generation system using fossil fuel Yu oxygen-enriched combusting rubbish
WO2019237869A1 (en) * 2018-06-15 2019-12-19 上海锅炉厂有限公司 Multi-process coupled power generation system combusting fossil fuel and oxygen-rich combustion waste

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Addressee: Jie Wenxia

Document name: Patent certificate of utility model

C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20100203

Termination date: 20110531