CN202382251U

CN202382251U - Novel waste incineration boiler

Info

Publication number: CN202382251U
Application number: CN2011205645211U
Authority: CN
Inventors: 项光明; 李�荣; 刘晖
Original assignee: ZHEJIANG WEIMING ENVIRONMENT PROTECTION CO Ltd
Current assignee: ZHEJIANG WEIMING ENVIRONMENT PROTECTION CO Ltd
Priority date: 2011-12-29
Filing date: 2011-12-29
Publication date: 2012-08-15
Anticipated expiration: 2021-12-29

Abstract

The utility model relates to a boiler used for incinerating municipal solid waste and generating steam for steam supply and power generation. The technical scheme includes that the novel waste incineration boiler is characterized in that a two-section reciprocating type grate is adopted, an auxiliary burner is arranged on the lower portion of a hearth and on the side wall above the two-section reciprocating type grate, and a start-up burner is arranged on the rear wall on the lower portion of the hearth. A burning chamber, a tri-flue, a horizontal flue and a tail U-shaped flue are arranged behind the hearth, wherein the outlet of the tail U-shaped flue is connected directly with a neutralization reaction tower. According to the technical scheme, the novel waste incineration boiler aims to overcome defects in the prior art, and guarantee the municipal solid waste with low heat value, high moisture and high ash content to be dried, burned, and burned out timely.

Description

The refuse incineration boiler

Technical field

The utility model relates to and a kind ofly burns domestic waste and produce the boiler that steam is used for steam supply, generating.

Background technology

Along with the raising and economic emergence of living standards of the people, the domestic waste of China increases rapidly, and how dealing carefully with rubbish has become the task of top priority.The development garbage burning boiler burns rubbish in boiler, and utilize the heat that burns to produce steam and be used for steam supply and generating, be garbage as resource, minimizing and innoxious optimal path, have good environmental benefit, social benefit and economic benefit.

China's urban consumption level is lower, and the not flammable composition ratio of rubbish is higher, and calorific value is far below developed country.But along with improving constantly of China's urban life level, the trend development that municipal refuse is just increasing towards flammable composition gradually.To the rubbish characteristic of China, require garbage incinerating system to have very strong adaptability for the variation of rubbish composition, can carry out in time, effectively adjust combustion process according to the fluctuation of rubbish composition, to guarantee in time igniting and smooth combustion of rubbish.In order to burn the domestic waste of domestic low heat value, high moisture content, ash-rich better, so developed a kind of refuse incineration boiler, impel timely drying of rubbish and active combustion with this, guarantee that incineration firing is complete, effectively suppress the generation of harmful substance.

Summary of the invention

The purpose of the utility model is to overcome the deficiency that prior art exists, and a kind of the guarantee timely drying of domestic waste of low heat value, high moisture content, ash-rich, the refuse incineration boiler that catches fire, burns and burn are provided.

Realize above-mentioned purpose, the utility model adopts following technical scheme, a kind of refuse incineration boiler; Include steelframe, burner hearth, drum, fire grate and slag tap and ash discharge equipment; Wherein burner hearth is installed on the steelframe, and drum is installed in the top of burner hearth, and fire grate is arranged on the bottom of burner hearth; Slag tap and be arranged on the below of fire grate with ash discharge equipment; It is characterized in that: described fire grate is two sections reciprocating fire grates, said lower furnace portion and be positioned on the side wall of two sections reciprocating fire grates top and auxiliary burner be installed, mounting points ignition combustor on the back wall of lower furnace portion; Be provided with burning chamber, three flues, horizontal flue and afterbody U type flue behind the described burner hearth, afterbody U type flue outlet directly links to each other with the neutralization reaction tower.

The utility model further is provided with: evaporating heating surface is installed in said three flues, and it has independent closed circuit; Be provided with high temperature superheater, medium temperature overheater and low temperature superheater in the said horizontal flue; The heating surface of high temperature superheater, medium temperature overheater and low temperature superheater is formed by coiled pipe; Vertically be suspended in the horizontal flue; In the said afterbody U type flue economizer is set, and gas bypass is set at afterbody U type flue place.

The utility model further is again: be positioned at two sections reciprocating fire grate tops on the said burner hearth and arrange face arch and rear arch; And in front and back the arch place arranges secondary wind respectively, the tube bank of said evaporating heating surface, high temperature superheater, medium temperature overheater, low temperature superheater and economizer is all adopted along row and is arranged.

The utility model further is again: the heating surface place of said three flues, horizontal flue and afterbody U type flue all arranges the shock-wave ash blowing device.

Through adopting such scheme, the utlity model has following advantage:

1, adopt two sections reciprocating fire grates, this kind fire grate can make rubbish overturn effectively, stir, and has comparatively ideal burning condition, can realize rubbish completing combustion.Simple backstepping or forwards fire grate are to the stirring of rubbish and stir lessly, occur the phenomenon that local rubbish is grilled thoroughly, local rubbish does not burn again easily.Two sections reciprocating fire grates that backstepping fire grate and forwards fire grate are combined; Can make incineration firing thorough; Have adapt to that thermal value range is wide, the Load Regulation ability is big, stable and reliable operation, sufficient combustion, characteristics such as workable, the domestic waste of China without letter sorting, low heat value, high moisture content, ash-rich is specially adapted to burn.

2, superheater surface is made up of coiled pipe, vertically is suspended in the horizontal flue, and is simple in structure, hangs conveniently, is difficult for dust stratification.

3, the adiabatic front and back arch structure of design makes full use of radiant heat rubbish is carried out preheating and drying, and simultaneously, arch sprays into secondary wind in front and back, strengthens the disturbance of flue gas, the fire stroke of prolong smoke, and the incineration firing effect is good, burnout rate is high.

4, on two sections reciprocating fire grates, the burn flue gas that produces flow through successively burner hearth, burning chamber, three flues, horizontal flue and afterbody U type flue of domestic waste.Flue gas flow is long, and abundant cooled flue gas prevents because of coking influences the boiler heat absorption, flue gas through three flues after, the temperature that gets into horizontal flue has been lower than ash fusion point, can avoid coking on superheater surface.

5, evaporating heating surface is arranged in three flues, has independent closed circuit, and is safe and reliable.This layout not only can reduce the flue-gas temperature that gets into superheater, has also saved a lot of spaces.

6, high temperature superheater adopts following current to arrange, the single tube coil structures, and steam flow rate is very fast, and tube wall temperature is lower, can prevent high temperature corrosion effectively.

7, all arrange the shock-wave ash blowing device at each heating surface place, can in time remove coking and dust stratification on the heating surface, do not influence the heat transfer of each heating surface.

8, economizer is arranged in the afterbody U type flue, not only is beneficial to the absorption flue gas heat, reduces exhaust gas temperature, improves the thermal efficiency, also makes full use of the space, makes boiler structure compact.

9, at afterbody U type flue gas bypass is set, can be used to regulate exhaust gas temperature, make it to be in the temperature that is fit to the environmental protection needs.

10, afterbody U type flue outlet directly is connected with the neutralization reaction tower, is connected as a single entity the framework and the boiler steelframe that support the neutralization reaction tower, has not only saved steel, has also shortened the flue gas stroke, has practiced thrift the place.

Below in conjunction with accompanying drawing the utility model is further described.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment.

The specific embodiment

As shown in the figure: 1 is two sections reciprocating fire grates, and 2 is steelframe, and 3 for slagging tap and ash discharge equipment, and 4 is auxiliary burner, and 5 is start-up burner, and 6 is evaporating heating surface; 7 is high temperature superheater, and 8 is medium temperature overheater, and 9 is low temperature superheater, and 10 is economizer, and 11 is burner hearth, and 12 is burning chamber; 13 is three flues, and 14 is horizontal flue, and 15 is afterbody U type flue, and 16 is the neutralization reaction tower, and 17 is face arch; 18 is rear arch, and 19 is secondary wind, and 20 is the shock-wave ash blowing device, and 21 is gas bypass, and 22 is drum.

A kind of refuse incineration boiler; Include steelframe 2, burner hearth 11, drum 22, two sections reciprocating fire grates 1 and slag tap and ash discharge equipment 3; Wherein burner hearth 11 is installed on the steelframe 2; At two sections reciprocating fire grates 1 of lower disposed of burner hearth 11, auxiliary burner 4, mounting points ignition combustor 5 on the back wall of burner hearth 11 bottoms are installed on the side wall of burner hearth 11 bottoms.Behind burner hearth 11, set gradually burning chamber 12, three flues 13, horizontal flue 14 and afterbody U type flue 15, installation is slagged tap and ash discharge equipment 3 below two sections reciprocating fire grates 1.In three flues 13, arrange evaporating heating surface 6; High temperature superheater 7, medium temperature overheater 8 and low temperature superheater 9 are set respectively in horizontal flue 14; And the heating surface of high temperature superheater 7, medium temperature overheater 8 and low temperature superheater 9 is formed by coiled pipe, vertically is suspended in the horizontal flue 14, and horizontal flue 14 outlets connect afterbody U type flue 15; Afterbody U type flue 15 is equipped with economizer 10 and gas bypass 21, and outlet directly links to each other with neutralization reaction tower 16.Be provided with face arch 17 and rear arch 18 in burner hearth 11 bottoms, in addition, arrange secondary wind 19 with rear arch 18 places at face arch 17.All arrange shock-wave ash blowing device 20 at each heating surface place.

Claims

1. refuse incineration boiler includes steelframe, burner hearth, drum, fire grate and slags tap and ash discharge equipment, and wherein burner hearth is installed on the steelframe; Drum is installed in the top of burner hearth; Fire grate is arranged on the bottom of burner hearth, slags tap to be arranged on the below of fire grate with ash discharge equipment, and it is characterized in that: described fire grate is two sections reciprocating fire grates; Said lower furnace portion and be positioned on the side wall of two sections reciprocating fire grates top auxiliary burner is installed; Mounting points ignition combustor on the back wall of lower furnace portion is provided with burning chamber, three flues, horizontal flue and afterbody U type flue behind the described burner hearth, afterbody U type flue outlet directly links to each other with the neutralization reaction tower.

2. refuse incineration boiler according to claim 1 is characterized in that: evaporating heating surface is installed in said three flues, and it has independent closed circuit; Be provided with high temperature superheater, medium temperature overheater and low temperature superheater in the said horizontal flue; The heating surface of high temperature superheater, medium temperature overheater and low temperature superheater is formed by coiled pipe; Vertically be suspended in the horizontal flue; In the said afterbody U type flue economizer is set, and gas bypass is set at afterbody U type flue place.

3. refuse incineration boiler according to claim 2; It is characterized in that: be positioned at two sections reciprocating fire grate tops on the said burner hearth and arrange face arch and rear arch; And in front and back the arch place arranges secondary wind respectively, the tube bank of said evaporating heating surface, high temperature superheater, medium temperature overheater, low temperature superheater and economizer is all adopted along row and is arranged.

4. refuse incineration boiler according to claim 2 is characterized in that: the heating surface place of said three flues, horizontal flue and afterbody U type flue all arranges the shock-wave ash blowing device.