CN201386997Y - Forced circulation type waste heat boiler of cement kiln - Google Patents

Abstract

A forced circulation type waste heat boiler of a cement kiln is used for a waste heat boiler of the cement kiln and installed at the tail part of a cement rotary kiln and consists of a boiler, a heating surface tube bundle, a connecting tube bundle, a dust-removing shaker, wherein the boiler is a horizontal passage type structure, the heating surface is a snake-shaped tubular structure which is assembled and vertically suspended in a flue through a top cover box, smoke gas horizontally punches the heating surface tube bundles which is provided with the dust-removing shaker, and boiler water is forcedly circulated by a hot water circulation pump. The forced circulation type waste heat boiler of the cement kiln has the advantages that: the waste heat boiler is the horizontal passage type structure; the heating surface is the snake-shaped tubular structure, and the smoke gas horizontally punches the heating surface tube, therefore, the sealing performance is good and the heat transferring effect is excellent; the heating surface tube bundle is provided with the special shaker, therefore, the ashes is easy to clean and is not easy to accumulate, and the probability of accumulating bridge does not exist; and the boiler water is forcedly circulated by the hot water circulation pump, therefore, the circulation effect of the boiler water is stable, the tube explosion of the boiler is prevented, the arrangement of the heating surface tube bundle structure of the boiler is compact, and the steel material and the occupied area are saved.

Description

The forced circulation type kiln heat recovery boiler

Technical field

The utility model relates to kiln heat recovery boiler, particularly a kind of forced circulation steam filtration-kiln heat recovery boiler, be installed in the cement rotary kiln afterbody, the heat of the low-temperature flue gas that the kiln tail is got rid of produces the device of low-pressure superheated steam for the wheel unit generation by this patent equipment.

Background technology

At the cement kiln afterbody, kiln heat recovery boiler need be set reclaim heat.Existing boiler structure all is the vertical or horizontal Natural Circulation type of furnace, and in the interbank dust stratification bridging phenomenon that is prone to, metal consumption is bigger, poor sealing performance.

Summary of the invention

Technical problem to be solved in the utility model is to provide a kind of forced circulation type kiln heat recovery boiler, and boiler is the horizontal channel formula, and heating surface is that the coiled pipe structure vertically is suspended in the flue flue gas transversal flow heating surface pipe by the assembling of top cover case; Heated surface bundle has special rapping apparatus, and stove water is made forced circulation with hot water circulating pump; Waste heat boiler heating surface is that the coiled pipe structure is assembled into integral body by the top cover case, and boiler does not have wall pipe, good airproof performance, and the heated surface bundle compact conformation reduces steel consumption and saves the area.

The technical scheme in the invention for solving the above technical problem is, forced circulation type kiln heat recovery boiler of the present utility model, form by boiler, heated surface bundle, connection tube bank, ash disposal vibrator four parts, wherein, the stove tube cylindrical shell of boiler is formed by the roll of steel plate weldering, and the manhole device of 425 * 320mm is all arranged on the end socket at two ends; Boiler is a horizontal channel formula structure, and heating surface is that the coiled pipe structure vertically is suspended in the flue by the assembling of top cover case, the horizontal punching out heated surface bundle of flue gas, and heated surface bundle is equipped with the ash disposal rapping apparatus, stove water hot water circulating pump forced circulation.

Described heated surface bundle, be followed successively by superheater, evaporimeter, economizer from front to back, vertically be suspended in the flue, the structure of superheater, evaporimeter, economizer is assembled into integral body respectively by collection case, top cover case, furred ceiling pipe, coiled pipe, rapping pipe, be welded by connecting tube bank, wherein, the collection case is installed in the top cover upper box part again, the coiled pipe and the furred ceiling pipe of drawing from the collection case are suspended under the top cover case, seal with sleeve pipe when passing the top cover case; The coiled pipe bottom is connected with the rapping pipe.

Described top cover case is a cuboid steel plate hermetically-sealed construction, middle filling refractory material and insulation material.

The beneficial effects of the utility model are:

1, waste heat boiler is the horizontal channel formula, and the dust that mechanical vibrator falls falls into ash bucket, avoids with the discarded high-temperature blower that enters;

2, to be the coiled pipe structure vertically be suspended in the flue by the assembling of top cover case heating surface, flue gas transversal flow heating surface pipe, and good seal performance, heat-transfer effect are good;

3, heated surface bundle has special rapping apparatus, and deashing is easy, is difficult for dust stratification, the possibility that does not exist accumulation to put up a bridge;

4, stove water is made forced circulation with hot water circulating pump, and stove water circulating effect is stable, prevents the boiler booster, and the boiler heating surface Pipe bundle structure is arranged compact, saves steel and occupation of land.

Description of drawings

Fig. 1 is the structural representation of the utility model waste heat boiler.

Fig. 2 is a vertical view of the present utility model.

Fig. 3 is a right view of the present utility model.

Fig. 4 is the structural representation of the utility model heated surface bundle.

Fig. 5 is the side view of Fig. 4.

Label declaration in the accompanying drawing

The 1-drum

2-superheater 2 '-superheater bank

The tube bank of 3-evaporimeter 3 '-evaporimeter

The tube bank of 4-economizer 4 '-economizer

5-boiler jacket 6-connects tube bank 7-hot water circulating pump

8-ash disposal rapping apparatus 9-rapping pipe 10-collection case

The snakelike tube bank of 11-top cover case 12-furred ceiling pipe 13-

The specific embodiment

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

See also shown in Fig. 1～5, forced circulation type kiln heat recovery boiler of the present utility model is formed (seeing shown in Fig. 1～3) by drum 1, superheater bank 2 ', evaporimeter tube bank 3 ', economizer tube bank 4 ', boiler jacket 5, connection tube bank 6, hot water circulating pump 7, ash disposal rapping apparatus 8.

Described drum 1 cylindrical shell is formed by the roll of steel plate weldering, and the manhole device of 425 * 320mm is all arranged on the end socket at two ends; Two water level meters on the spot are housed on the boiler, and quartz ampoule and double-colored each one also leave two pairs of water level balance container joints in addition, for report to the police, the indication of control room water level and steam water-level regulate control use automatically.

Drum 1 is provided with relief valve connection, guarantees the unlikely superpressure of drum 1 pressure.

For preventing that foreign material from entering hot water circulating pump, filter is housed at the decline mouth of pipe.

On steelframe, an end is a hold-down support to drum 1 by two bearing supports, and the other end is a movable bearing support, and drum is free wxpansion vertically.

Described heated surface bundle (seeing shown in Fig. 4,5), heated surface bundle are the general name of superheater bank 2 ', evaporimeter tube bank 3 ', gas saver tube bank 4 '.

Every group of heated surface bundle structure is basic identical, is made up of top cover case 11, collection case 10, snakelike tube bank 13, furred ceiling pipe 12 and rapping pipe more than 9 parts, is assembled into integral body respectively, only need put during installation in the square hole that is placed on furnace roof, all around with furnace roof steel construction seal welding.

Top cover case 11 is a cuboid, steel plate hermetically-sealed construction, middle filling refractory material and insulation material.

The collection case 10 of heated surface bundle is installed in top cover case 11 tops.The snakelike tube bank 13 and the furred ceiling pipe 12 of drawing from collection case 10 are hung in the top cover case 11 times, seal with sleeve pipe when passing top cover case 11.

Snakelike tube bank 13 and furred ceiling pipe 12 all participate in the circulation of stove water, connection between furred ceiling pipe 12 and the snakelike tube bank 13 is as hinge, snakelike tube bank 13 is freely swung in certain scope, the rapping pipe 9 that can be fixed under the effect of ash disposal rapping apparatus 8 in the tube bank obtains bump, reaches the dedusting purpose.When being heated, snakelike tube bank 13 can also freely expand downwards.

Described boiler jacket 5 is formed horizontal flue, heated surface bundle (with flue gas flow direction) from front to back is followed successively by superheater 2, evaporimeter 3, economizer 4, vertically be suspended in the flue, flue gas transversal flow hot side pipe, make the flue gas that passes through obtain the cooling cooling, the intrafascicular aqueous medium of heating surface tube is heated to heat up and produces steam.

Described connection tube bank 6 is the connecting pipe between boiler drum 1, hot water circulating pump 7 heated surface bundles.Boiler feedwater at first enters economizer 4 preheatings by connecting tube bank 6, enters drum 1 then, and the stove water in the drum 1 enters hot water circulating pump 7 by connecting piping 6, and stove water is depressed by connecting tube bank 6 in adding of hot water circulating pump 7 and entered evaporimeter 3; Become steam water interface by the stove water after the evaporimeter heating, go out evaporimeter and turn back to drum 1; Steam water interface is done carbonated drink separation in drum 1, the stove water after the separation enters hot water circulating pump 7 by connection tube bank 6 and circulates once more.Isolated steam enters superheater 2 in drum 1; Steam after heating sees the Turbo-generator Set generating off by pipeline or hot user uses.

Described ash disposal rapping apparatus 8, heated surface bundle adopt efficient elasticity rapping mode, and the tube bank of every group of heating surface all has special rapping apparatus, and the rapping pipe is the heat-resistance stainless steel pipe.Rapping is to hit the pipe row who shakes and can freely swing by motor drives spring hammering device, removes the dust stratification on the tube wall, and dust stratification falls into ash bucket and discharges body of heater.

Claims (3)

1, a kind of forced circulation type kiln heat recovery boiler is characterized in that:

Form by boiler, heated surface bundle, connection tube bank, ash disposal vibrator four parts, wherein, boiler is a horizontal channel formula structure, heating surface is that the coiled pipe structure vertically is suspended in the flue by the assembling of top cover case, the horizontal punching out heated surface bundle of flue gas, heated surface bundle is equipped with the ash disposal rapping apparatus, stove water hot water circulating pump forced circulation.

2, forced circulation type kiln heat recovery boiler according to claim 1 is characterized in that:

Described heated surface bundle, be followed successively by superheater, evaporimeter, economizer from front to back, vertically be suspended in the flue, the structure of superheater, evaporimeter, economizer is assembled into integral body respectively by collection case, top cover case, furred ceiling pipe, coiled pipe, rapping pipe, be welded by connecting tube bank, wherein, the collection case is installed in the top cover upper box part again, the coiled pipe and the furred ceiling pipe of drawing from the collection case are suspended under the top cover case, seal with sleeve pipe when passing the top cover case; The coiled pipe bottom is connected with the rapping pipe.

3, forced circulation type kiln heat recovery boiler according to claim 1 is characterized in that:

Described top cover case is a cuboid steel plate hermetically-sealed construction, middle filling refractory material and insulation material.

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