CN202660727U - Hot water boiler burning brown coal - Google Patents

Abstract

The utility model discloses a hot water boiler burning brown coal. An upper boiler tube and a lower boiler tube are longitudinally arranged, convection banks are sequentially arranged between the upper boiler tube and the lower boiler tube, densely distributed water cooling wall pipes are arranged on two sides of a hearth, a lateral wall, a front wall and a back wall between a collecting box and the upper boiler tube are communicated with each other, a steam and water separation and continuous pollution discharging device is arranged in the upper boiler tube, and a pollution discharging device is installed in the lower boiler tube. The hot water boiler burning brown coal has the advantages of being high in capacity, high in efficiency, complete in burning, low in operation cost and the like.

Description

A kind of combustion brown coal hot-water boiler

Technical field

The utility model relates to a kind of energy-saving hot water boiler, especially relates to a kind of combustion brown coal hot-water boiler.

Background technology

Be accompanied by the development growth of China's manufacturing industry, China's boiler manufacturing industry has obtained significant progress, can produce the boiler of multiple different pressures grade and capacity, has become world today's boiler for producing and has used maximum countries.Present combustion brown coal hot-water boiler, be generally shell boiler or the reciprocating-grate boiler of water-fire pipe series, its shortcoming has: the one, and the fire tube boiler thermal efficiency is lower, because adopt the threaded flue of transversal flow in the pipe, fouling phenomenon is more serious, causes BTHE below 70%, moving per about two months needs deashing once, deashing must blowing out be opened the front and back smoke box, carries out with specific purpose tool, and is cumbersome with respect to water-tube boiler; The 2nd, it is more serious that reciprocal grate leaks coal, and fire grate segment burns out easily; The 3rd, because brown coal moisture is larger, chain furnace is difficult to solve coking problem.

Summary of the invention

The purpose of this utility model is: a kind of thermal efficiency height, sufficient combustion, safe and reliable combustion brown coal hot-water boiler are provided.

The technical solution of the utility model is: comprise upper drum, lower drum, front header, rear set box, left header, right header, upper drum and lower drum vertically arrange, the upper drum front lower place is burner hearth, the convection bank of in-line arrangement is housed between upper drum and the lower drum, the burner hearth both sides are furnished with the water screen tube of dense arrangement, be communicated with by side wall between left and right sides header and the upper drum, be communicated with by front wall between front header and the upper drum, be communicated with by rear wall between rear set box and the upper drum, be provided with carbonated drink in the upper drum and separate and continuous blow off equipment, periodic blowdown is housed in the lower drum.

Boiler tail arranges economizer, and economizer has inspection opening.

The beneficial effects of the utility model are: 1, because convection heating surface adopts intensive convection bank, the parallel baffled coefficient of heat transfer is high, and convection bank in-line arrangement layout is strong from deashing ability, is difficult for dust stratification, makes boiler have the higher thermal efficiency, and the boiler operatiopn expense is low.2, smoke dust discharge concentration is low, and is low in the pollution of the environment, and general bed temperature belongs to low-temperature burning in burning below 900 ℃, and the NOX of generation is few.3, fuel tolerance is strong, the colm of the high ash content of not only burning high-grade fuel, and burning, high-moisture, low-volatile, fuel screening wide ranges, the wide-size distribution coal grain of burning 0-10mm.4, the utility model has namely kept the advantage of prototype boiler, it is frequent or water quality is slightly poor because of start and stop to have overcome again natural circulation boiler, the deficiency of water circulation accident easily occurs, the performance indications such as the thermal efficiency are guaranteed in higher level, have the foot of exerting oneself, efficient height, burning fully, the characteristics such as ash discharge, dreg removing system are advanced reliable, and operating cost is low.5, the utility model has been compared clear superiority with coal-fired, oil burning boiler, and its thermal efficiency can reach more than 80%, and higher more than nearly ten percentage points than common chain furnace, energy-saving effect is remarkable.Greatly saved coal-fired consumption under equal calorific value, fuel consumption approximately is 2 times of oil burning boiler, but fuel price is 1/5, one 7MW boiler of the present utility model of light oil, if operation in a year will be saved more than 350 ten thousand yuan of funds than oil firing in 2400 hours.

Description of drawings

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

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

The specific embodiment

Can find out from the left view of structural representation of the present utility model shown in Figure 1 and Fig. 2, the utility model comprises upper drum 3, lower drum 6, front header 7, rear set box 8, left header 9, right header 10, upper drum 3 and lower drum 6 vertically arrange, vertical upper lower drum, water screen tube 4 and convection bank 5 of putting above whole boiler, burner hearth 2 and combustion chamber below.Furnace wall 14 fronts, upper drum 3 front lower places are burner hearths 2, and blast cap 1 is equipped with in burner hearth 2 bottoms.Lower drum 6 is equipped with the convection bank 5 of in-line arrangement in furnace wall 14 back between upper drum 3 and the lower drum 6, burner hearth 2 both sides are furnished with the water screen tube 4 of dense arrangement.Be communicated with by side wall 11 between left and right sides header and the upper drum 6, be communicated with by front wall 12 between front header 7 and the upper drum 3, be communicated with by rear wall 13 between rear set box 8 and the upper drum 3, being provided with carbonated drink in the upper drum 3 separates and continuous blow off equipment, in the lower drum 6 periodic blowdown is housed, boiler tail arranges separately cast iron gilled tube economizer, and is provided with two inspection openings, is convenient to maintenance and inspection and afterbody blows ash.The utility model is assembled into top heating surface body part in company, build at the scene boiling fire box by laying bricks or stones.Large of boiler bottom comprises lower furnace and combustion chamber, needs to build by laying bricks or stones in the building-site installation.

The utility model is forced circulation, and the water system flow process is:

The flow process of water has adopted forced circulation structure, water-flow circuit is reasonable in design, overcome quantity of circulating water deficiency in the natural circulation boiler, velocity in pipes reduces, easily fouling, the easily shortcoming of booster, and the characteristics relatively high according to the thermic load of burner hearth inside, improve the pressure flow velocity of two side walls, reached more than the 1.2m/s, thereby guaranteed the security of water circulation.

Combustion system of the present utility model adopts Boiling Combustion, high-temperature particle is strenuous exercise in boiling bed, has greatly improved the exchange on all directions between bed, comprises the exchange of matter between particle, reach the heat exchange between particle and bed internal heating surface between particle, and strengthened the combustion process of particle.Coal dust is Boiling Combustion in the combustion chamber, and the high-temperature flue gas that produces after the burning enters convection bank by burner hearth, after enter economizer after, after deduster is evolved to flue gas, taken out to draw by chimney by air-introduced machine and enter atmosphere.The lime-ash that coal slurry generates after burning is mainly discharged by the bottom slag-drip opening, and each ash discharge cinder notch need access sluiceway, and the lime-ash in the sluiceway can be rushed to ashcan by the waterpower ash discharge.

Claims (2)

1. one kind fires the brown coal hot-water boiler, comprise upper drum (3), lower drum (6), front header (7), rear set box (8), left header (9), right header (10), it is characterized in that: described upper drum (3) and lower drum (6) vertically arrange, upper drum (3) front lower place is burner hearth (2), the convection bank (5) of in-line arrangement is housed between upper drum (3) and the lower drum (6), burner hearth (2) both sides are furnished with the water screen tube (4) of dense arrangement, be communicated with by side wall (11) between left and right sides header and the upper drum (3), be communicated with by front wall (12) between front header (7) and the upper drum (3), be communicated with by rear wall (13) between rear set box (8) and the upper drum (3), be provided with carbonated drink in the upper drum (3) and separate and blowdown apparatus, lower drum is equipped with blowdown apparatus in (6).

2. combustion brown coal hot-water boiler according to claim 1, it is characterized in that: boiler tail arranges economizer, and economizer has inspection opening.

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