CN2737463Y

CN2737463Y - Roller medium speed coal mill

Info

Publication number: CN2737463Y
Application number: CN 200420068000
Authority: CN
Inventors: 郭长岭
Original assignee: GUO CHAONGLING
Current assignee: GUO CHAONGLING
Priority date: 2004-06-08
Filing date: 2004-06-08
Publication date: 2005-11-02
Anticipated expiration: 2014-06-08

Abstract

The utility model relates to a roller medium speed coal mill which comprises a motor, a reducer, a grinding disc, grinding rolls, a pressurize device, a separator and a coal falling pipe, etc. The utility model is characterized in that a pulverized coal blowing device which comprises a blowing nozzle, a hot-air pipe and an adjusting door is arranged above the grinding disc and between each grinding rolls. The lower part of the separator and the coal falling pipe are provided with a return powder re-separation device which comprises a return powder, a triangle spiral-flow plate and a jagged annular plate, and an axial adjusting baffle is arranged at the upper part between a housing and the separator. The utility model is characterized in that the roller medium speed coal mill can increase the output of the coal mill, reduce the resistance and reduce the electricity consumption of the coal milling and the transportation of the coal mill, and the water adjustability of the coal can be increased.

Description

A kind of roll-type medium-speed pulverizer

Technical field:

The utility model is the roll-type medium-speed pulverizer in the mechanical manufacturing field.

Background technology:

Existing roll-type medium-speed pulverizer has multiple pattern, is the fewer coal pulverizer of a kind of power consumption, carries power consumption big but still exist, and ature of coal moisture content adaptability is not enough extensively waited not enough problem.

Summary of the invention:

The purpose of this utility model is will provide a kind of to improve pulverizer capacity, reduce power consumption and improve the roll-type medium-speed pulverizer wider to the ature of coal water adaptability.

The technical measures that the utility model is taked: in above the mill and the position between each grinding roller, be equiped with the warm-air pipe of drawing from hot blast inlet tube or hot blast doughnut, on this pipe adjustment doors is housed, warm-air pipe passes and is fixed on the shell, the bottom of warm-air pipe and pipe end top are equiped with to blow over against the coal spout place and raise nozzle above mill, the hot blast of ejection blows and kicks up and take away being extruded and being milled in less coal dust of particle in the powdery and the coal breakage coal dust than granule on the mill, and the remaining bigger coal cinder of particle is relatively easy to be extruded again and be milled into powdery on the mill; Because the less coal dust of particle is blown timely and kicks up and take away in pulverize and the coal breakage, this part is exactly that coal pulverizer improves a part of exerting oneself, reduced grinding the idle work that expends in the process repeatedly, its result both can improve pulverizer capacity, can reduce the power consumption of coal-grinding again.Before raw coal is milled He in milling, carried out heat drying owing to blow the hot blast of raising the nozzle ejection in advance, the part water evaporates has been come out, so also improved the ability wider to the adaptability of ature of coal moisture.

Be equiped with back powder in the bottom of separator and coal spout and send out plate, triangle eddy flow plate, zigzag annular plate and annular plate; Be separated return powder along the separator inwall to lower slider, flow direction changes after sending out plate, landing again then, and the air-flow that quilt is bled by the bottom in this process blows once more to be kicked up, wherein the less qualified coal dust of particle is pulled away, and what particle was bigger drop on the mill; Triangle eddy flow plate, zigzag annular plate and annular plate are to make the air-flow that bleeds produce rotation to move upward, and the interior swirling eddy direction of its direction and separator is consistent.Because the Hui Fenzhong that separates of separated device has a lot of qualified fine powders, this part fine powder air-flow that bled blows and kicks up, and is taken out of coal pulverizer; This fine powder amount that partly is pulled away promptly is that coal pulverizer improves the another part of exerting oneself, and can prevent that again returning mill is ground repeatedly, thereby reduce the circulating ratio and the power consumption of coal dust.

Be equiped with the axial adjustment baffle plate in the top ring-type gas channel between coal pulverizer shell and separator, replace the radiai adjustment baffle plate that roll-type medium velocity coal machine separator adopts in the prior art, thereby can significantly reduce the resistance of separator.

After adopting above-mentioned measure, the utlity model has and can improve pulverizer capacity, reduced Hui Fenliang and circulating ratio, reduced resistance, reduced coal-grinding and conveying power consumption, improved characteristics such as adaptability to ature of coal moisture content is wider.

Description of drawings:

Reaching embodiment in conjunction with the accompanying drawings is described below:

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

Fig. 2, Fig. 3 are partial sectional views.

The utility model is to send out plate 17, triangle eddy flow plate 18, zigzag annular plate 19, annular plate 20 etc. by the nozzle 12 between motor 1, reductor 2, mill 3, grinding roller 4, pressue device 5, shell 6, separator 7, coal spout 8, outlet 9, hot-wind inlet pipe 10, annular heat air compartment 11, mill and the shell, foreign material floss hole 13, hot-blast spray nozzle 14, warm-air pipe 15, axial adjustment baffle plate 16, ring-type to constitute.

The specific embodiment:

In the position between each grinding roller above the mill, be provided with warm-air pipe 15, be provided with a row in its bottom and the pipe end top is provided with over against the coal spout place to blow and raises nozzle 14, warm-air pipe is to draw from hot blast inlet tube 10 or hot blast doughnut 11, pass and be fixed on the shell 6, on the warm-air pipe of coal pulverizer outside, be provided with adjustment doors 21.

Be provided with back powder separator again in the bottom of separator 7, coal spout 8, ring-type is sent out plate 17 and is welded on the separator inwall, triangle eddy flow plate 18 is welded on separator inwall and the zigzag annular plate 19, and annular plate 20 is welded on coal spout and the zigzag annular plate.

Annulus between shell 6 and separator 7 is equiped with axial adjustment baffle plate 16.

Claims

1, a kind of roll-type medium-speed pulverizer, form by motor, reductor, mill, grinding roller, pressue device, shell, separator, coal spout, outlet, hot blast inlet tube, hot blast doughnut, it is characterized in that: above the mill and the warm-air pipe that Zhuan Let has hot blast inlet tube or hot blast doughnut to draw between each grinding roller, be equiped with on it blow raise nozzle and adjustment doors form with on the mill and the coal dust in the coal breakage blow the blowing of coming of kicking up and raise device.

2, medium-speed pulverizer according to claim 1 is characterized in that: be equiped with back powder in the bottom of separator and coal spout and send out plate, triangle eddy flow plate, zigzag annular plate, annular plate and form the fine powder that separator is isolated back and forth in the powder and blow the separator again of kicking up and taking away.

3, medium-speed pulverizer according to claim 1 and 2 is characterized in that: the top annulus between shell and separator is equiped with the axial adjustment baffle plate.