TWI484040B - Slag Roving Granulation Screening Device - Google Patents

Description

Slag rotor cup granulation screening device

The present invention relates to a granulation screening apparatus, and more particularly to a slag rotor granulation screening apparatus.

The blast furnace slag of the consistent steel mill has a sensible heat of about 150,000 Kcal/t, and the slag of the converter slag is about 60,000 Kcal/t. In the current development of heat recovery, the slag is a high-temperature sensible heat source with a temperature above 1400 °C. Although the high temperature molten slag has a large amount of sensible heat, the slag has a very low heat transfer coefficient and high viscosity. Therefore, it is quite difficult to directly recover the heat from the slag fluid. Even if it is recycled, only the surface heat energy can be recovered. After the surface is dried, the heat inside the slag is less likely to be transmitted, resulting in an extended cooling time. In the existing slag treatment method, the blast furnace slag is mainly treated by water quenching, and the treated slag is taken out as a blast furnace cement raw material, but the heat energy in the process is completely unrecoverable. The converter slag is air-cooled and then pushed into the puddle to accelerate the cracking method to achieve the purpose of slag stabilization after cooling, but in the same way, the sensible heat of the converter slag can not be recovered.

In the environment of high energy and environmental protection, the development of slag heat energy recovery technology is becoming more and more important. Therefore, some manufacturers have found that slag has the characteristics of low heat transfer coefficient, and it is necessary to crush or granulate the slag to facilitate heat recovery. After the slag is turned into solid particles, the volume becomes smaller, Therefore, the problem of low heat transfer coefficient can be overcome. The dry granulation of slag mainly includes mechanical agitation, mechanical crushing after solidification, high pressure blasting, and centrifugal granulation. In recent years, the literature mainly uses dry granulation technology by rotating cup method (or centrifugation method). Taking the cup granulation method as an example, the high-speed rotating disk (cup) body is mainly used as a granulating power source, and the slag on the rotor cup is pulled out by centrifugal force, so that the slag is broken in its surface tension and momentum pulling, but Whether the granulation is successful or not, and how the granulation parameters are modified with the slag feed rate and slag characteristics, requires a device that can quickly adjust the operating parameters as the basis for the selection of operating parameters.

Accordingly, it is an object of the present invention to provide a slag rotor granulation screening apparatus which facilitates the screening of conditions for sensible heat recovery of slag and the production of particulate slag, and which can quickly select suitable rotor granulation operating parameters.

Thus, the slag rotor cup granulation screening device of the present invention comprises a granulation furnace, a rotor, a variable frequency control motor, a blower unit, and a control unit.

The granulation furnace comprises an upper body, a middle body, and a lower body, the upper body, the middle body and the lower body are stacked on each other and detachably connected and integrated, the upper body comprises a feeding port. The upper body, the middle body and the lower body together define a granulation space, the middle body has a first lateral air passage, and a plurality of the first lateral air passages are connected to the granulation space a first air outlet hole, and the lower body includes a second lateral air passage, a plurality of second air outlet holes for communicating the second lateral air passage with the granulation space, and a plurality of lower air inlet holes.

The rotor cup is detachably and rotatably disposed in the lower body and located in the granulation space and is used to carry the slag.

The variable frequency control motor is disposed outside the granulation furnace and is used to drive the rotor to rotate.

Providing a required cooling air through the bottom air inlet holes, the cooling air further comprising the second lateral air duct, the second air outlet holes, the first lateral air duct, and the first A vent hole flows through the granulation space.

The control unit is configured to control the rotational speed of the variable frequency control motor, and the air supply volume and the wind speed of the air supply unit.

The utility model has the advantages that the granulation furnace is integrally connected to the upper body, the middle body and the lower body, and is detachably combined with each other, and the rotor cup is also replaceable. It can quickly change the airflow pattern and the rotor type, and then quickly screen and determine the suitable parameters of the slag rotor granulation, such as slag ratio, air inlet mode, rotor speed, etc.

1‧‧‧Pelletizing furnace

11‧‧‧Ontology

111‧‧‧ Feeding port

112‧‧‧Upper connection

113‧‧‧Perforation

12‧‧‧Intrinsic

121‧‧‧First outer wall

122‧‧‧Middle air deflector

123‧‧‧First joint

124‧‧‧Second joint

125‧‧‧Upper through hole

126‧‧‧ under the hole

127‧‧‧ Middle air inlet

128‧‧‧First lateral air duct

129‧‧‧First air outlet

13‧‧‧Underlying

131‧‧‧ bottom wall

1311‧‧‧ Positioning Department

1312‧‧‧ recessed area

1313‧‧‧lower air inlet

132‧‧‧Second outer wall

133‧‧‧lower air deflector

134‧‧‧lower connection

135‧‧‧ openings

136‧‧‧Second lateral air duct

137‧‧‧Second outlet

138‧‧‧Support feet

14‧‧‧Pelleting space

2‧‧‧ rotating cup

3‧‧‧Frequency control motor

31‧‧‧ Output shaft

4‧‧‧Air supply unit

41‧‧‧ pipeline

5‧‧‧Control unit

6‧‧‧Locking components

61‧‧‧ bolt

62‧‧‧ nuts

Other features and advantages of the present invention will be apparent from the embodiments of the present invention, wherein: FIG. 1 is a partial exploded view showing a preferred embodiment of the slag rotor granulation screening apparatus of the present invention; Figure 2 is a schematic view of the use of Figure 1 for assistance.

Before the present invention is described in detail, it should be noted in the following In the description, similar elements are denoted by the same reference numerals.

1 is a preferred embodiment of a slag rotor cup granulation screening apparatus according to the present invention, comprising a granulation furnace 1, a rotor cup 2, a variable frequency control motor 3, a blower unit 4, a control unit 5, and Most locking elements 6.

The granulating furnace 1 comprises an upper body 11, a middle body 12, and a lower body 13. The top end and the bottom end of the upper body 11 are open, wherein a top end and a convergent shape form a feed opening 111. The bottom end of the upper body 11 extends outwardly and has an upper layer connecting portion 112. The upper layer connecting portion 112 is disposed. There are many perforations 113.

The top end and the bottom end of the main body 12 are also open, and include a first outer wall 121 and a layer air deflector 122 disposed inside the first outer wall 121. The first outer wall body 121 has a first joint portion 123 extending outward from the top edge, a second joint portion 124 extending outward from the bottom edge, and a plurality of through holes 125 disposed on the first joint portion 123. a plurality of through holes 126 are disposed on the second joint portion 124, and a plurality of air inlet holes 127 are disposed between the first joint portion 123 and the second joint portion 124. The first outer wall 121 and the middle layer guide air A first lateral air duct 128 is defined between the plates 122. The middle air deflector 122 has a plurality of first air outlet holes 129.

The lower body 13 includes a bottom wall 131, a second outer wall 132 surrounding the bottom wall 131, and a lower air deflector 133 disposed on the inner side of the bottom wall 131 and the second outer wall 132. And a plurality of support legs 138 connected to the outer bottom surface of the bottom wall 131. The second outer wall body 132 has a lower layer connecting portion 134 extending from the top end and outwardly, and a plurality of openings 135 are defined in the lower layer connecting portion 134. The bottom wall 131, the second outer wall body 132 and the lower layer guide A second lateral air duct 136 is defined between the wind panels 133. The lower air deflector 133 has a plurality of second air outlet holes 137. In addition, the bottom wall 131 has a positioning portion 1311 protruding inward from the center, a recessed portion 1312 located on the outer side and opposite to the positioning portion 1311, and a plurality of lower air inlet holes 1313.

The rotor 2 is disposed on the positioning portion 1311 of the lower body 13. The variable frequency control motor 3 is disposed in the recessed portion 1312 of the lower body 13, and the variable frequency control motor 3 has an output shaft 31 extending through the positioning portion 1311 and the recessed portion 1312 for connecting to the bottom of the rotor cup 2. .

In the present embodiment, the air blowing unit 4 is described by a blower, but it is not limited thereto. Of course, any air blowing device that can output cooling wind power can be used. The air blowing unit 4 is connected to the intermediate air inlet holes 127 and the lower air inlet holes 1313 by a plurality of lines 41.

The control unit 5 is electrically connected to the air supply unit 4 and the variable frequency control motor 3 for controlling the rotation speed of the variable frequency control motor 3 and the air supply amount and the wind speed of the air supply unit 4.

Referring to Figures 1 and 2, each of the locking elements 6 includes a bolt 61 and a nut 62 that is threadedly engaged with the bolt 61.

The upper body 11, the middle body 12, and the lower body 13 of the granulation furnace 1 are stacked by the upper body 11, the middle body 12, and the lower body 13 from top to bottom, even if The upper connecting portion 112 of the upper body 11 is superposed on the first engaging portion 123 of the middle body 12, and the through holes 113 on the upper connecting portion 112 and the upper through holes 125 on the first engaging portion 123 are Up and down alignment, the second joint portion 124 of the middle body 12 is superposed on the lower layer connecting portion 134 of the lower body 13 , and the second joint portion 124 is made The upper through holes 126 are vertically aligned with the openings 135 of the lower layer connecting portion 134, and the through holes 113 and the upper through holes 125 are respectively aligned through the bolts 61, and the opposite holes are aligned. The lower through holes 126 and the openings 135 are screwed into the bolts 61 by the nuts 62 so that the upper body 11 , the middle body 12 , and the lower body 13 are detachably The combination of the phases is integrated, and the upper body 11, the central body 12, and the lower body 13 together define a granulation space 14.

The first lateral air passage 128 of the middle body 12 communicates with the granulation space 14 through the first air outlet holes 129, and the second lateral air passage 136 of the lower body 13 transmits the second lateral air passages 136. The air hole 137 communicates with the granulation space 14, and the first lateral air passage 128 of the middle body 12 and the second lateral air passage 136 of the lower body 13 do not directly communicate with each other.

Referring to FIG. 2, in use, slag (not shown) may be placed on the rotor 2, and after the slag rotor granulation screening device is activated, the output shaft 31 is driven by the inverter control motor 3 to drive the slag. Rotating cup 2 rotates and centrifugally granulates the slag; at the same time, the blowing unit 4 is supplied with the required cooling air through the pipelines 41, the intermediate inlet holes 127, and the lower inlet openings 1313. The cooling air is further circulated in the granulation space 14 by the second lateral air passage 136, the second air outlet holes 137, the first lateral air passages 128, and the first air outlet holes 129. The slag in the granulation is simultaneously cooled.

Since the rotor 2 is controlled by the variable frequency control motor 3, the effect of the rotational speed on the granulation characteristics of the slag can be explored by controlling the rotor 2 at different rotational speeds. In addition, it can be controlled by the control unit 5 The air blowing unit 4 is configured to transport the intermediate air inlet holes 127 and the lower air inlet holes 1313 with different cooling air volumes, and the influence of different cooling strategies on the preliminary cooling and setting of the slag after granulation can be discussed. In addition, the middle body 12 and the lower body 13 adopt a double wall design, and the middle air deflector 122 and the lower air deflector 133 are replaced to achieve different air outlet patterns, and provide uniformity. Lateral wind speed. As for the single-layer design of the upper body 11, the main purpose is to prevent the high temperature slag from splashing out during the test.

In summary, the slag rotor granulation screening device of the present invention adopts the above-mentioned structural design, and adopts the modular design of the granulating furnace 1 to quickly replace the upper body 11, the middle body 12, and the lower body according to different needs. And providing the required cooling air to the intermediate air inlet holes 127 and the lower air inlet holes 1313 through the air blowing unit 4, thereby quickly adjusting the advantages of the air blowing mode and the cooling air supply mode, and The effect of different cooling strategies on the initial cooling and setting of the slag after granulation; in addition, by controlling the rotor 2 at different speeds by the variable frequency control motor 3, the influence of the rotational speed on the granulation characteristics of the slag can be discussed, so that the suitability of continuous operation can be determined. Operating parameters, such as cooling air volume, rotor 2 speed, and cooling type, affect the granulation characteristics, and contribute to the slag sensible heat recovery and particle slag production conditions screening, thereby providing operating parameters for large-scale rotor granulation equipment. The choice is indeed true for the purposes of the present invention.

The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, the simple equivalent changes and modifications made by the patent application scope and patent specification content of the present invention, All remain within the scope of the invention patent.

1‧‧‧Pelletizing furnace

11‧‧‧Ontology

111‧‧‧ Feeding port

112‧‧‧Upper connection

113‧‧‧Perforation

12‧‧‧Intrinsic

121‧‧‧First outer wall

122‧‧‧Middle air deflector

123‧‧‧First joint

124‧‧‧Second joint

125‧‧‧Upper through hole

126‧‧‧ under the hole

127‧‧‧ Middle air inlet

128‧‧‧First lateral air duct

129‧‧‧First air outlet

13‧‧‧Underlying

131‧‧‧ bottom wall

1311‧‧‧ Positioning Department

1312‧‧‧ recessed area

1313‧‧‧lower air inlet

132‧‧‧Second outer wall

133‧‧‧lower air deflector

134‧‧‧lower connection

135‧‧‧ openings

136‧‧‧Second lateral air duct

137‧‧‧Second outlet

138‧‧‧Support feet

2‧‧‧ rotating cup

3‧‧‧Frequency control motor

31‧‧‧ Output shaft

4‧‧‧Air supply unit

41‧‧‧ pipeline

5‧‧‧Control unit

6‧‧‧Locking components

61‧‧‧ bolt

62‧‧‧ nuts

Claims (5)

A slag rotor cup granulation screening device comprises: a granulation furnace comprising an upper body, a middle body, and a lower body, the upper body, the middle body and the lower body being superposed on each other and detachably combined The upper body includes a feeding port, and the upper body, the middle body and the lower body together define a granulation space, the two ends of the body are open and include a first outer wall, An air deflector disposed on an inner side of the first outer wall body, and a plurality of air inlet holes disposed in the first outer wall body, the first outer wall body and the middle air deflector jointly defining a first side To the air duct, the middle air deflector has a plurality of first air outlets for allowing the first lateral air passage to communicate with the granulation space, and the lower body includes a second lateral air passage, and the plurality of a second air outlet hole communicating with the granulation space, and a plurality of lower air inlet holes; a rotor cup detachably disposed rotatably on the lower body and located in the granulation space Used to carry slag; a variable frequency control motor, disposed outside the granulation furnace and used Driving the rotor to rotate; a blower unit is connected to the middle air inlet hole, and provides a required cooling wind through the lower air inlet holes, the cooling air is further by the second lateral air passage, the first wind direction a second air outlet, the first lateral air passage and the first air outlets are circulated in the granulation space; and a control unit is configured to control the rotation speed of the frequency conversion control motor and the air supply unit Air volume and wind speed. The slag rotor granulation screening apparatus according to claim 1, wherein the second lateral air passage is not in direct communication with the first lateral air passage, and the second air outlet is through the second air outlet. An outlet hole and the granulation space are indirectly connected. The slag cup granulation screening apparatus according to claim 1 or 2, wherein the lower body comprises a bottom wall, a second outer wall wall surrounding the bottom wall, and a bottom wall and the first a lower air deflector on the inner side of the outer wall, and a plurality of support legs connected to the outer bottom surface of the bottom wall, the second lateral air passage is the bottom wall, the second outer wall and the lower air deflector The second air outlet holes are defined on the lower air deflector, and the lower air inlet holes are disposed on the bottom wall. The slag cup granulation screening device of claim 3, wherein a positioning portion is protruded inwardly at a center of the bottom wall, and a concave portion is formed on an outer side of the bottom wall relative to the positioning portion, the rotor cup is disposed The variable frequency control motor is disposed in the recessed portion of the lower body, and the variable frequency control motor has an output shaft connected to the bottom of the rotating cup. The slag rotor granulation screening device of claim 1, further comprising a plurality of locking elements, wherein the upper body, the middle body and the lower body are stacked on each other and assembled by the locking elements.