CN2739492Y

CN2739492Y - Transverse boiler coal economizer composite dust-removing device

Info

Publication number: CN2739492Y
Application number: CN 200420075026
Authority: CN
Inventors: 曾庆智; 杨全治; 张大丽; 曾东霞
Original assignee: Henan University
Current assignee: Henan University
Priority date: 2004-10-29
Filing date: 2004-10-29
Publication date: 2005-11-09
Anticipated expiration: 2014-10-29

Abstract

The utility model discloses a transverse boiler coal economizer composite dust-removing device, characterized in that; a dust-removing device is compounded in the front or at the back of a transverse boiler coal economizer; the device is provided with a box body whose both ends are communicated with a smoke channel; at least three rows of smoke dust cut-off components are arranged in the box; a dust collecting bucket is arranged at the position of the smoke dust cut-off components corresponding to the bottom of the coal economizer. The device joins the heat transferring and dust removing functions of the boiler coal economizer organically, and dust is removed from air in the process of flowing through the coal economizer. The device can decrease the initial dust-removing concentration by 81 percent to 93 percent, which meets the new international discharge requirements. The utility model has the advantages of reasonable structure, low energy consumption, high comprehensive dust removing efficiency, etc.

Description

Pressure-bearing type boiler economizer composite dedusting device

Technical field:

The utility model belongs to the boiler dusting technical field, is a kind of pressure-bearing type boiler economizer composite dedusting device.

Background technology

In technique known, the dedusting of existing coal-burning boiler all is in the flue beyond the boiler deduster to be installed, and this is the needs of environmental protection, also is the indispensable facility of boiler.But coal-burning boiler only depends on the outer primary dust removing of boiler, and the discharging of its flue dust is difficult to reach the smoke evacuation dust-laden standard of national regulation sometimes.If want to improve dust removing effects, deduster need adopt the two-stage dedusting method, and design outfit two-stage air-introduced machine, certainly will cause deduster to work under the duty of high energy consumption like this.Therefore investment is big, cost is high, power consumption is high, operating cost is high.In addition, the economizer of installing in the boiler is the important component part of boiler combustion equipment, be arranged in the flue of boiler, it is to utilize high-temperature flue gas that economizer body and fin are washed away, after the water that enters economizer carried out preheating earlier, enter boiler again, play and improve the stove water temperature and save the effect that economizes coal.Because this economizer has only the thermal power transfer of function singleness, does not possess dedusting function, existing in addition grate firing chain grate boiler flue dust initial ejection concentration is all at 5000mg/m ³About, and new standard requires the inaccurate 1600～2000mg/m of surpassing ³This has just proposed in as energy conversion equipment boiler itself, needs again to have the index value that alleviates soot emissions, has both possessed dedusting function simultaneously, just can reach the requirement of new national standard soot emissions regulation, therefore reducing the initial dust discharge of boiler inner flue is current urgency problem to be solved.

The utility model content

The purpose of this utility model provides that a kind of thermal-arrest can be changed, economizes coal, dedusting is an one, and can effectively reduce the pressure-bearing type boiler economizer composite dedusting device of boiler initial dust-density emission.

For realizing that the technical scheme that the purpose of this utility model is taked is: level is installed in boiler pressure-bearing type economizer front portion or economizer rear positions are compounded with dust arrester, this device has the casing that two ends communicate with flue, arrange in it to be arranged with the above flue dust of at least three rows assembly that dams, be respectively arranged with the control of dust ash bucket in the dam corresponding position, bottom of assembly and economizer of flue dust.

The flue dust assembly that dams adopts the baffle maze structure, and its cross sectional shape is the arc groove with the opposite combination of size, and wherein little arc groove can be closed circular.

According to the pressure-bearing type boiler economizer composite dedusting device that such scheme is made, be that heat transfer and the dedusting with boiler economizer organically combines.Carry out dedusting when utilizing flue gas when flowing through economizer, must consume resistance, can make the boiler initial dust-density emission reduce by 81%～93%, satisfied the emission request of new national standard " emission standard of air pollutants for boilers ".With the chain grate boiler is example: former boiler smoke initial ejection concentration is 5000mg/m ³, install this device dedusting after, flue dust initial ejection concentration can be reduced to≤994mg/m ³, be significantly less than the state specified standards value.Created good condition for the boiler smoke system adopts conventional dust arrester thus, also provide technical guarantee for adapting to new boiler dust discharge standard-required.This composite dedusting device makes boiler economizer from single thermal power transfer functions of the equipments, increased dedusting function again, and resistance specific resistance is very little mutually with conventional dust remover resistance, has only 100～167Pa, only 1/8th of quite conventional dust remover resistance, the resistance that its produces can not influence the normal operation of blower fan, therefore, can save the electric energy of blower fan effectively, have the effect of one-machine-multi-function.Compared with prior art: this device has reasonable in design, and cost is low, power consumption is low, combined dust-eliminating efficient advantages of higher.

Description of drawings

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

Fig. 2 is the vertical view of Fig. 1.

Fig. 3 is the modular construction schematic diagram that dams of the flue dust among Fig. 1.

Fig. 4 is the cross sectional view of A-A among Fig. 3.

The specific embodiment

Referring to Fig. 1, Fig. 2, pressure-bearing type boiler economizer composite dedusting device of the present utility model, be the horizontal flue place in boiler 1, a horizontally disposed economizer composite dedusting casing 3 is installed, utilize composite dedusting casing 3 that dedusting and heat transfer are organically combined.The two ends of casing communicate with flue, in casing, arrange the flue dust be arranged with more than at least three rows assembly 4 that dams, this assembly adopts baffle maze 4-1 structure, and (referring to Fig. 3, Fig. 4) its cross sectional shape is the arc groove with the opposite combination of size, and wherein little arc groove can be closed circular.The dam bottom of assembly 4 and economizer 2 of flue dust is respectively arranged with control of dust ash bucket 6, and lock storage 7 is equipped with in the exit of control of dust ash bucket 6.For ease of deashing, deashing vibrator 8 is housed on the outer wall of composite dedusting casing 3.Label 5 is boiler supports.

Operation principle of the present utility model is that the utilization flue gas carries out dedusting in the process of economizer of flowing through.When ash-laden gas when the horizontal flue direction of boiler enters economizer composite dedusting casing 3, by dam baffle maze 4-1 in the assembly 4 of flue dust, ash-laden gas is staggered on flow direction, dust-contained airflow is by the slit between the baffle plate, with higher speed ejection, flow to next baffles middle part, (minimizing resistance) streams next row to air-flow along circular-arc edge, and the labyrinth arc-shaped slot is interior to be kept here and flue dust bumps against.Because flow velocity reduces in the arc groove, flue dust falls into the bottom ash bucket along the arc groove inner plate surface.Another part flue dust washes away in economizer 2 high speeds, drops down behind collision economizer body and the fin, falls into control of dust ash bucket 6, and flue gas flow rate is similar to zero in the ash bucket, therefore is collected, and regularly removes by lock storage 7.

Claims

1, a kind of pressure-bearing type boiler economizer composite dedusting device, it is characterized in that: level is installed in boiler pressure-bearing type economizer front portion or economizer rear positions are compounded with dust arrester, this device has the casing that two ends communicate with flue, be furnished with the flue dust assembly that dams in it, be respectively arranged with the control of dust ash bucket in the dam corresponding position, bottom of assembly and economizer of flue dust.

2, pressure-bearing type boiler economizer composite dedusting device according to claim 1, it is characterized in that: the flue dust assembly that dams adopts the baffle maze structure, its cross sectional shape is the arc groove with the opposite combination of size, and wherein little arc groove can be closed circular.

3, pressure-bearing type boiler economizer composite dedusting device according to claim 1 is characterized in that: flue dust dam arrangement of components be arranged as at least three row more than.