Summary of the invention
The present invention is mainly by carrying out integrated to conventional dust pelletizing system technique internal structure combination, the integrated dust removing technique unit, reduce unnecessary pipe network and affiliated facility, reduce SR, reduce equipment investment, flow process simplifies the operation, process air quantity, efficiency of dust collection and system operation reliability thereby reach the raising system, reduce the purpose of energy consumption.
Aspect the capture of flue gas, purification, discharging, the design of technical solution of the present invention is mainly based on the hydrodynamics formula:
Δ P in the formula: the Pa of unit is decreased in system's resistance;
ρ: gas density, units/kg/m
V: air velocity, the m/s of unit;
λ: coefficient of frictional resistance;
D: pipe diameter, the mm of unit;
L: duct length, the mm of unit;
∑ ξ i: coefficient of partial resistance algebraical sum.
Be not difficult to find out from above hydrodynamics formula, in the numerous key elements that consist of dust pelletizing system resistance damage, the coefficient of partial resistance ∑ ξ i that the length L of gas flow rate v, pipeline and change of shape thereof cause is three large important factor in order.
Analyze from the constitutive requirements of whole conventional dust pelletizing system technique, fume trap cover often is subjected to the restriction of site space layout to the pipeline of deduster, duct length L often arranges according to the concrete condition of dirt source point, is difficult to shorten, and can only carry out the optimal design of fume trap cover and pipe network.And in conventional dust pelletizing system, being exported to fan outlet one segment process link from deduster all is high flow rate, high dynamic pressure zone, and the shape of deduster outlet conduit, blower fan inlet pipeline, fan outlet pipeline, noise damping channel, aiutage passage is not identical, when high velocity air passed through these special-shaped pipelines, the sudden expansion of its structure, sudden contraction part had caused coefficient of partial resistance ξ very large.The high dynamic pressure in this section zone, high coefficient of partial resistance, long flow process are all so that the resistance of this section system is decreased very high.Under normal conditions, the deduster system resistance that is exported to the aiutage section is decreased and will be accounted for system and always hinder 50～70% of damage.
The present invention by taking the measures such as innovative design, integrated equipment to come as much as possible shortened process to conventional deduster to this segment process of aiutage, reduces SR, thereby effectively reduces energy consumption just.
Technical scheme of the present invention is as follows:
Specified conditions according to the industrial smoke of required improvement, configuration fume trap cover 1 and large-scale integration dust-removing unit 3, and with flue 2 with above-mentioned both connect, thereby consist of have flue gas trapping, the ultrashort flow process dust pelletizing system of the repertoires such as respectively discharging of purification, noise abatement and clean air and dust.
Wherein, large-scale integration dust-removing unit 3 integrates air inducing exhaust, gas cleaning, three technique units of storage ash discharge, substitute deduster 4, blower fan 6 and concentrated ash silo 12 in the conventional dust pelletizing system, saved the process procedures such as fan wind inleting tube road 5, blower fan wind pipe 7, silencer 8, aiutage 9, unloading valve 10, one or more levels conveyer 11, concentrated ash silo 12.
After industrial smoke enters large-scale integration dust-removing unit 3, at first carry out filtration, purification by the 14 pairs of flue gases in gas cleaning unit, realize that gas, dirt separate, clean air enters air inducing exhaust unit 16, and dust falls into storage ash discharge unit 18.Gas cleaning unit 14 adopts stepping off-line rotary pulse deashing mechanism 17, and the off-line blowing device is arranged symmetrically with take the slew gear center as mid point, rotates accurately contraposition by the servo system control slew gear, successively all filter bags 15 is turned round the off-line winding-up.
Clean air after gas cleaning unit 14 purifies directly enters air inducing exhaust unit 16.The air inducing mode of air inducing exhaust unit 16 is associated mode, and gas cleaning unit 14 directly links with air inducing exhaust unit 16, does not contain any pipeline therebetween; Its exhaust mode is straight-line, and clean air directly enters atmosphere.Also install deadener additional at air inducing exhaust unit 16 and carried out noise abatement.So, just fan wind inleting tube road 5, blower fan wind pipe 7, silencer 8, the aiutage 9 of the high dynamic pressure in the conventional dust pelletizing system technique, high coefficient of partial resistance have been saved, shortened system flow, optimized system process, the resistance that greatly reduces whole dust pelletizing system is decreased.
Gas cleaning unit 14 filters the dust of collecting and falls into storage ash discharge unit 18.Storage ash discharge large ash bucket of unit 18 usefulness and replace equipment such as a plurality of ash buckets, one or more levels conveyer (11), concentrated ash silo (12) in the conventional dust pelletizing system without airborne dust ash discharging mechanism 19, for providing, whole system unloads grey function, and the reentrainment of dust during the establishment ash discharge.
Whole technological process of the present invention is as follows:
Industrial smoke is under the suction function of dust pelletizing system, the cover 1 that is captured is collected, enter integration dust-removing unit 3 by pipeline 2, carry out gas, dirt separation in gas cleaning unit 14 by filter bag 15, the clean air after the filtration directly enters atmosphere behind air inducing exhaust unit 16.Be gathered in the dust in filter bag 15 outsides under the high pressure off-line winding-up effect of stepping off-line rotary pulse deashing mechanism 17, fall into storage ash discharge unit 18, transport by being discharged into haulage vehicle without airborne dust ash discharging mechanism 19.
Compare with conventional dust pelletizing system technique, major advantage of the present invention is: the optimization by above-mentioned process procedure and simplifying, realized the ultrashort flow process of dust pelletizing system.The advantages such as the present invention has that resistance is low, energy consumption and noise are low, and floor space is little, and is without airborne dust, reliable when unloading ash, and maintenance workload is few.