CN202675311U

CN202675311U - Settling chamber for pure-combustion garbage boiler

Info

Publication number: CN202675311U
Application number: CN 201220316604
Authority: CN
Inventors: 叶文表; 施宇清
Original assignee: HANGZHOU HAILU HEAVY INDUSTRY Co Ltd
Current assignee: HANGZHOU HAILU HEAVY INDUSTRY Co Ltd
Priority date: 2012-07-03
Filing date: 2012-07-03
Publication date: 2013-01-16
Anticipated expiration: 2022-07-03

Abstract

The utility model relates to a settling chamber for a pure-combustion garbage boiler. The settling chamber consists of an inlet flue, a descending flue, a bottom ash bucket and steering flue, an ascending flue and convection heating surfaces, wherein inlet flue pouring materials are laid at the inlet flue; and bottom ash bucket and steering flue pouring materials are laid at the bottom ash bucket and steering flue. Compared with the prior art, the settling chamber has the advantages that 1, the cavity descending flue is arranged additionally, so that dust in flue gas from a flue gas separation device is settled further, the dust entering the convection heating surfaces is reduced, and the abrasion of the heating surface on the tail part is reduced; 2, the dust entering the convection heating surfaces is reduced, the condition of the dust deposition on the convection heating surfaces is improved, and the corrosion condition of the heating surfaces is relieved; and 3, the temperature of the flue gas before a superheater is reduced effectively (the temperature can be reduced by about 100 DEG C), so that the temperature of the pipe wall of the superheater, and the high-temperature chlorine corrosion of the pipe wall is avoided or relieved.

Description

Pure combustion garbage fired boiler expansion chamber

Technical field

The utility model technology introduction a kind of expansion chamber of the CFBB for pure combustion rubbish, the utility model technology belongs to the garbage burning boiler field.

Background technology

At present, the CFBB that is used for combustion refuse that the design of majority boiler producer is produced, fluidized-bed combustion boiler with common fire coal on the overall structure does not have large difference, all is to adopt the triple channel arrangement form: first passage is that furnace wall cooling, second channel are that flue gas separation unit, third channel are the afterbody convection heating surface.This conventional structure does not fully take into account the particularity of fuel, owing to contain the chlorine element in the flue gas of combustion refuse, easily at superheater tube wall generation high temperature chloride corrosion, causes easily the problems such as the corrosion of back-end surfaces and dust stratification.

Summary of the invention

The utility model purpose be to provide a kind of reasonable in design, can the sedimentation smoke dust pure combustion refuse furnace expansion chamber.

It is that this pure combustion refuse furnace expansion chamber is by inlet flue duct, downward-flow flue, bottom ash bucket and turn to flue, uptake flue and convection heating surface to form that the utility model solves the problems of the technologies described above the technical scheme that adopts, described inlet flue duct is laid with the inlet flue duct castable, described bottom ash bucket and turn to the flue place to lay bottom ash bucket and turn to the flue castable.

The utility model compared with prior art has the following advantages and effect: 1, increased the cavity type downward-flow flue, to out the further sedimentation dust of flue gas from flue gas separation unit, the dust that enters convection heating surface reduces the wearing and tearing that alleviate the afterbody hot side; 2, no matter boiler smoke is high temperature corrosion or cold end corrosion, its corrosivity is all closely related with the fouling of heating surface degree, because the effect of expansion chamber reduces the dust that enters convection heating surface, improved the convection current dust stratification situation of being heated, the corrosion condition of heating surface is alleviated; 3, effectively reduce the front flue-gas temperature (approximately can reduce about 100 ℃ of flue-gas temperatures) of superheater, thereby reduce the superheater tube wall temperature, avoid or alleviate the high temperature chloride corrosion of tube wall.

Description of drawings

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

Label declaration: inlet flue duct 1, downward-flow flue 2, bottom ash bucket and turn to flue 3, uptake flue 4, convection heating surface 5, inlet flue duct castable 6, bottom ash bucket and turn to flue castable 7.

The specific embodiment

Below in conjunction with embodiment the utility model is described in further detail, following examples are to explanation of the present utility model and the utility model is not limited to following examples.

Embodiment 1: as shown in Figure 1, present embodiment is by inlet flue duct 1, downward-flow flue 2, bottom ash bucket and turn to flue 3, uptake flue 4, convection heating surface 5, inlet flue duct castable 6 and bottom ash bucket and turn to flue castable 7 to form.

In service, flue gas is entered by inlet flue duct 1 after flue gas separation unit separates, and then by downward-flow flue 2 and bottom ash bucket and turn to flue 3, enters into uptake flue 4, be furnished with convection heating surface 5 in uptake flue 4, smoke gas flow carries out heat release through convection heating surface 5.With the bottom ash bucket and turn in the flue 3, flue gas flow rate is low at downward-flow flue 2, because gravity and the effect of inertia that turns to, the dust granule in the flue gas is deposited to the bottom ash bucket and turns in the flue 3, and discharges from the bottom.

By the downward-flow flue 2 that fin panel casing forms, can effectively reduce the flue-gas temperature before the convection heating surface 5, avoid and alleviate the high temperature chloride corrosion of convection heating surface.Simultaneously; in order to prevent inlet flue duct 1 and bottom ash bucket and to turn to flue 3 places to wash away because the flue gas break-in causes; be laid with inlet flue duct castable 6 at inlet flue duct 1, bottom ash bucket and turn to flue 3 places to lay bottom ash bucket and turn to flue castable 7 is not worn with the pipe of protecting this two place.

The utility model technology main feature is: 1, full film type wall structure, good seal performance; 2, cavity type downward-flow flue, effectively sedimentation dust.

The utility model compared with prior art has the following advantages and effect: 1, increased the cavity type downward-flow flue, to out the further sedimentation dust of flue gas from flue gas separation unit, the dust that enters convection heating surface reduces the wearing and tearing that alleviate the afterbody hot side; 2, no matter boiler smoke is high temperature corrosion or cold end corrosion, and its corrosivity is all closely related with the fouling of heating surface degree.Because the effect of expansion chamber reduces the dust that enters convection heating surface, improved the convection current dust stratification situation of being heated, the corrosion condition of heating surface is alleviated; 3, contain the chlorine element owing in the flue gas of combustion refuse, easily at superheater tube wall generation high temperature chloride corrosion.The expansion chamber of the utility model technology can effectively reduce the front flue-gas temperature (approximately can reduce about 100 ℃ of flue-gas temperatures) of superheater, thereby reduce the superheater tube wall temperature, avoids or alleviate the high temperature chloride corrosion of tube wall.

In addition, need to prove, the specific embodiment described in this specification, the shape of its parts and components, institute's title of being named etc. can be different.Allly conceive equivalence or the simple change that described structure, feature and principle are done according to the utility model patent, be included in the protection domain of the utility model patent.The utility model person of ordinary skill in the field can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment; only otherwise depart from structure of the present utility model or surmount this scope as defined in the claims, all should belong to protection domain of the present utility model.

Claims

1. pure combustion refuse furnace expansion chamber, it is characterized in that: by inlet flue duct, downward-flow flue, bottom ash bucket and turn to flue, uptake flue and convection heating surface to form, described inlet flue duct is laid with the inlet flue duct castable, described bottom ash bucket and turn to the flue place to lay bottom ash bucket and turn to the flue castable.