CN201003759Y - Multiplayer cooling cylinder type cold slag device - Google Patents

Abstract

The utility model discloses a multi-layer cooling roller type dregs cooling machine, pertaining to the roller type dregs cooling machine technical field, which comprises an outer roller(1), an inner roller(2) and a dregs guiding vane(3) arranged on the inner wall of the inner roller. A water channel(4) is formed between the outer roller(1) and the inner roller(2); the inner roller(2) is also internally provided with a big water pipe(6). The utility model greatly improves the cooling effect and reduces the dregs discharging temperature, mainly applicable for the boiler dregs discharging devices and high temperature grain material cooling devices in such fields as energy, environmental protection, oil, chemicals and metallurgy.

Description

Multilayer chilling roll formula slag cooler

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 multilayer chilling roll formula slag cooler.

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 helical blade in it, 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 what rolling-cylinder type slag-cooler adopted at present is that inner core blade promotion material travels forward, material is in the middle of two blades, 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 increase film-cooled heat, increases substantially cooling effect, reduces tapping temperature, significantly improves the multilayer chilling roll formula slag cooler that the quantity of slag.

In order to achieve the above object, the following technical scheme of employing of the present utility model: a kind of multilayer chilling roll formula slag cooler, comprise install on urceolus, inner core and the inner core inwall lead ten of slags, be formed with water channel between urceolus and the inner core, also be provided with big pipe in the inner core.

The outer wall of described big pipe is provided with leads the slag blade.The slag blade of leading on the described inner core inwall or on the outer wall of big pipe is provided with at least one little water pipe.

Described big pipe is the ring-type water pipe.

In the described large and small water pipe, and be connected with condensed water in the water channel between the inside and outside tube, increased film-cooled heat, improved cooling effect.

Analyze the slag cooler heat exchange, 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: $\frac{1}{K}=\frac{1}{K1}+\frac{1}{K2}+\frac{1}{K3}+\frac{1}{\mathrm{<figure-callout\; id="4"\; label="K"\; filenames="Y20062003653600061.png,Y20062003653600071.png"\; state="\{\{state\}\}">K</figure-callout>}4}$

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 is material in the middle of two blades, and the ulking thickness height becomes the cake shape half, and 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, this programme also is provided with big pipe in inner core.When material stirs downwards and travels forward from the inner core blade.In the contact process of blade and material, heat is taken away, material is a large amount of shedding in stirring process, fully contact with air, take away heat, also taken away heat with the slag that inner core contacts with big pipe by inner core and big pipe, material stirs material at inner core from the inner core blade like this, becomes a plurality of cooling surfaces by a cooling surface, and utilizes air-cooled or water-cooled, the corresponding raising of contact heat-exchanging area, thereby improved heat exchange efficiency greatly, broken through the tapping temperature limit (about 200 degree) of cylinder type cold slag machine, reached below 100 degree, because kept the advantage of former rolling-cylinder type slag-cooler, the slag cooler life-span reached more than 10 years.

The utlity model has long service life, the heat exchange efficiency height, film-cooled heat is big, good cooling results, tapping temperature is low, goes out the big advantage of the quantity of slag.

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 among the utility model embodiment 1;

Fig. 3 is the A-A cutaway view of Fig. 1 among the utility model embodiment 2;

Fig. 4 is the A-A cutaway view of Fig. 1 among the utility model embodiment 3;

Fig. 5 is the A-A cutaway view of Fig. 1 among the utility model embodiment 4;

Fig. 6 is the A-A cutaway view of Fig. 1 among the utility model embodiment 5.

The specific embodiment

Below in conjunction with embodiment the utility model is described.

Embodiment 1:

As shown in Figure 1 and Figure 2, a kind of multilayer chilling roll formula slag cooler, comprise install on urceolus 1, inner core 2 and the inner core inwall lead slag blade 3, be formed with water channel 4 between urceolus 1 and the inner core 2, also be provided with big pipe 6 in the described inner core 2.

Embodiment 2:

As Fig. 1, shown in Figure 3, a kind of multilayer chilling roll formula slag cooler, comprise install on urceolus 1, inner core 2 and the inner core inwall lead slag blade 3, be formed with water channel 4 between urceolus 1 and the inner core 2, also be provided with big pipe 6 in the described inner core 2, the outer wall of this big pipe 6 is provided with leads slag blade 3.

Embodiment 3:

As Fig. 1, shown in Figure 4, a kind of multilayer chilling roll formula slag cooler, comprise install on urceolus 1, inner core 2 and the inner core inwall lead slag blade 3, be formed with water channel 4 between urceolus 1 and the inner core 2, also be provided with big pipe 6 in the described inner core 2, the outer wall of this big pipe 6 is provided with leads slag blade 3, whenever leads slag blade 3 on the inner core inwall and is provided with a little water pipe 5, whenever leads slag blade 3 on the outer wall of big pipe 6 and is provided with two little water pipes 5.

Embodiment 4:

As Fig. 1, shown in Figure 5, a kind of multilayer chilling roll formula slag cooler, comprise install on urceolus 1, inner core 2 and the inner core inwall lead slag blade 3, be formed with water channel 4 between urceolus 1 and the inner core 2, also be provided with ring-type big pipe 6 in the described inner core 2, the outer wall of this big pipe 6 is provided with leads slag blade 3.

Embodiment 5:

As Fig. 1, shown in Figure 6, a kind of multilayer chilling roll formula slag cooler, comprise install on urceolus 1, inner core 2 and the inner core inwall lead slag blade 3, be formed with water channel 4 between urceolus 1 and the inner core 2, also be provided with ring-type big pipe 6 in the described inner core 2, the outer wall of this big pipe 6 is provided with leads slag blade 3, whenever leads slag blade 3 and is provided with little water pipe 5.

Claims (5)

1, a kind of multilayer chilling roll formula slag cooler, comprise install on urceolus (1), inner core (2) and the inner core inwall lead slag blade (3), be formed with water channel (4) between urceolus (1) and the inner core (2), it is characterized in that: also be provided with big pipe (6) in the inner core (2).

2, multilayer chilling roll formula slag cooler according to claim 1 is characterized in that: the outer wall of described big pipe (6) is provided with leads slag blade (3).

3, multilayer chilling roll formula slag cooler according to claim 1 and 2 is characterized in that: the described slag blade (3) of leading is provided with at least one little water pipe (5).

4, multilayer chilling roll formula slag cooler according to claim 1, it is characterized in that: described big pipe (6) is the ring-type water pipe.

5, multilayer chilling roll formula slag cooler according to claim 3, it is characterized in that: described big pipe (6) is the ring-type water pipe.

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