CN2934929Y - Continuous rolling cold slag device - Google Patents

Abstract

The utility model discloses a consecutive rolling slag cooler, containing an outer cylinder (1), an inner cylinder (2), and a slag guide blade (3) that is equipped on internal wall of the inner cylinder, a water canal (4) which is formed between the outer cylinder (1) and the inner cylinder (2). The slag guide blades (3) are equipped in the axial direction of the inner cylinder (2), and are spaced equipped along the circumference internal wall of the inner cylinder. The utility model adopts that the slag guide blades are equipped on the inner cylinder. Under the effect of the slag guide blades, the slag pile moves upward so that the slag is threw out. The throwing not only exchanges the heat with the channel that formed by the outer cylinder and the inner cylinder, but also exchanges heat with the flowing air in the inner cylinder. So the efficiency of heat exchange is high. Also, because the materials (slag) stay a long time in the inner cylinder, the cooling efficiency is quite good; the temperature of the tapping slag is low, and the tap slag is even, which makes the operation of the slag cooler is in stable condition. The utility model at the same also keeps the other advantages of the drum type slag cooler.

Description

Slag cooler continuously rolls

Technical field

The utility model relates to industrial circle boiler deslagging device, high-temperature particle material cooling devices such as being applied to the energy, environmental protection, oil, chemical industry, metallurgy, especially a kind of slag cooler that rolls continuously.

Background technology

At present, what domestic circulating fluidized bed boiler slag cooler mainly adopted is two-layer cylinder formula slag cooler, rolling-cylinder type slag-cooler mainly is to form cooling jacket by inner core and urceolus, be fixed with spiral in it and lead the slag blade, warm sludge and cooling water reverse movement and carry out heat exchange in the slag cooler cylindrical shell rotary course, cylindrical shell rotation is delivered to low-temperature zone with warm sludge from temperature end and forms cold slag, but because the rolling-cylinder type slag-cooler cooling quantity of slag is relatively large and stepless speed regulation and generally being selected for use.There are following characteristics in present rolling-cylinder type slag-cooler: because relatively large, the long service life of the rolling-cylinder type slag-cooler cooling quantity of slag, become domestic circulating fluidized bed boiler slag cooler main flow slag cooler, the rolling-cylinder type slag-cooler conveying capacity is restricted hardly, can satisfy the defeated slag requirement of large-scale cold slag machine fully.The major defect of rolling-cylinder type slag-cooler is that tapping temperature is generally more than 200 degree, because at present rolling-cylinder type slag-cooler adopts is that inner core is led the slag blade and promoted material and travel forward, material two lead the slag blade in the middle of, the ulking thickness height, become the cake shape half, material is very little with cooling tube wall contact area, causes the chilling temperature height, and rotary barrel is association of activity and inertia with static slag case and is located generally to leak slag.At above-mentioned situation, the key of developing large-scale cold slag machine is to increase substantially cooling effect, improves the cold quantity of slag thereby reach.And the key of cold slag effect is the contact area and the time of reducing thickness of slag layer, increasing slag and tube wall.

Summary of the invention

The purpose of this utility model provides a kind of good cooling results, the slag cooler that rolls continuously that tapping temperature is low.

In order to achieve the above object, the following technical scheme of employing of the present utility model: a kind of slag slag cooler that turns over continuously, comprise install on the ancient piece of jade, round, flat and with a hole in its centre in urceolus, inner core and the inner core lead the slag blade, be formed with water channel between urceolus and the inner core, lead the slag blade and be installed on the axial direction of inner core, and install at interval along an ancient piece of jade, round, flat and with a hole in its centre in the inner core circumference.

Analyze the heat exchange of cold slag machine, mainly have four kinds of approach: the conduction heat transfer of slag and inwall; The inside and outside heat of inner core is transmitted; The conduction heat transfer in inner tank theca and water jacket boundary layer (water speed is zero); The heat convection of water.

Heat transfer rate depends on overall heat-transfer coefficient K

Overall heat-transfer coefficient: $\frac{1}{K}=\frac{1}{K1}+\frac{1}{K2}+\frac{1}{K3}+\frac{1}{K4}$

K is an overall heat-transfer coefficient; K1 is the heat transfer coefficient of slag and inwall; K2 is the heat transfer coefficient of inner core inwall and inner tank theca; K3 is the conduction heat transfer coefficient that inner tank theca adheres to detention layer (water speed is 0); K4 is the convective heat-transfer coefficient of detention layer and turbosphere water.

K2, K3 be by hot conduction technique as can be known: it is worth 10 ⁴W/m ²More than ℃; K4 is a convective heat-transfer coefficient, and the convective heat-transfer coefficient of water has hundreds of w/m ²℃.The heat transfer coefficient of K1 has only 1/50 of water convective heat-transfer coefficient, so the heat transfer coefficient of slag, is the 'bottleneck' restrictions factor that influences overall heat-transfer coefficient.

The main cause that the heat transfer coefficient of slag is lower be material two lead the slag blade in the middle of, the ulking thickness height becomes the cake shape half, middle most material does not contact with heat transferring medium.Material contacts many more with heat transferring medium, the coefficient of heat transfer is high more, and it is fast more to conduct heat.

According to above-mentioned principle, a kind of slag cooler that rolls continuously of the utility model, it is to be equipped with to lead the slag blade in inner core, lead the slag blade be installed in inner core axially on, and install along the inner core circle spacing, allow material move forward.After material enters from inner core, be deposited in the material of leading between the slag blade not only can and urceolus and inner core between the water channel heat-shift, and when rotating, sheds inner core, in the process of shedding with inner core flow air heat-shift, and this is shed material and moves forward some positions once more and the water channel heat-shift between urceolus and the inner core in shedding, shed simultaneously next time, whole material moves slower in inner core, material (slag) is long in the time of staying of inner core, because cooling effect and being inversely proportional to cool time, the slag time of staying is long, chilling temperature is low more, heat exchange efficiency height like this, good cooling results, tapping temperature is low.

The utility model has the advantages that: this cold slag machine employing is led the slag blade and is installed on the inner core, the accumulation of slag produces upwards operation to shedding that slag carries out owing to lead the effect of slag blade, this sheds the water channel heat-shift that slag not only forms with urceolus and inner core, and in the process of shedding, carry out heat exchange with the inner core moving air, the heat exchange efficiency height.And since material (slag) time of staying in inner core long, thereby good cooling results, tapping temperature is low, it is even to slag tap simultaneously, guarantees that cold slag machine operates steadily, it also keeps other advantage of cylinder type cold slag machine.

Description of drawings

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

Fig. 2 is the A-A cutaway view of Fig. 1;

Fig. 3 is the outline drawing of leading slag blade 3 in the utility model;

Fig. 4 leads slag blade 3 to be installed in structural representation on the inner core 2 in the utility model;

Fig. 5 is the expanded view of Fig. 1;

Fig. 6 is the structural representation of leading in the utility model when piling up slag when slag blade 3 is installed in inner core 2.

The specific embodiment

A kind of slag cooler that rolls continuously of the utility model, mainly constitute by the slag blade of installing on the ancient piece of jade, round, flat and with a hole in its centre in urceolus 1, inner core 2 and the inner core 3 of leading,, wherein be formed with water channel 4 between urceolus 1 and the inner core 2, lead slag blade 3 and be installed on the axial direction of inner core 2, and install at interval along an ancient piece of jade, round, flat and with a hole in its centre in the inner core circumference.Lead slag blade 3 at the axial upper edge of an inner core inner core circumference ancient piece of jade, round, flat and with a hole in its centre every determining deviation installation.Lead slag blade 3 and can tilt or be installed in parallel on the interior ancient piece of jade, round, flat and with a hole in its centre of inner core, slag is deposited in leads between the slag blade, in the inner core rotary course, produces upwards operation to shedding that slag carries out owing to lead the effect of slag blade.This sheds the water channel heat-shift that slag formed with urceolus and inner core before shedding, carry out heat exchange with the inner core moving air in the process of shedding.

Claims (1)

1, a kind of slag cooler that rolls continuously, comprise install on the ancient piece of jade, round, flat and with a hole in its centre in urceolus (1), inner core (2) and the inner core lead slag blade (3), be formed with water channel (4) between urceolus (1) and the inner core (2), it is characterized in that: lead slag blade (3) and be installed on the axial direction of inner core (2), and install at interval along an ancient piece of jade, round, flat and with a hole in its centre in the inner core circumference.

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