CN202024349U

CN202024349U - Stokehole flour mill

Info

Publication number: CN202024349U
Application number: CN2011201055732U
Authority: CN
Inventors: 关宏伟; 段取连; 安君英; 顾彩鹭; 江秀华
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-04-12
Filing date: 2011-04-12
Publication date: 2011-11-02
Anticipated expiration: 2021-04-12

Abstract

The utility model relates to a stokehole flour mill which is applicable to a 4 to 35 t/h medium and small sized boiler. The utility model provides the stokehole flour mill which is applicable to the 4 to 35 t/h medium and small sized boiler, has a simple structure and can produce fine powder. The stokehole flour mill comprises a base, and a driving device and a shell body are arranged on the base. The stokehole flour mill is characterized in that the shell body is divided into a crushing cavity and a feeding cavity through a spacer board which is provided with through holes and a main shaft which is connected with the driving device penetrates through the crushing cavity and the feeding cavity and is arranged on the shell body; the main shaft which is arranged in the crushing cavity is provided with two or more than two plum frames which are provided with rotating arms, hammer shafts are arranged between the plum frames and the end parts of the rotating arms of the plum frames, the hammer shafts are provided with hammer heads through connecting bars which can rotate around the hammer shafts, and liner rolls are arranged in the crushing cavity, corresponding to the hammer heads; and a feeding impeller is arranged on the main shaft which is arranged in the feeding cavity, a feeding hole is arranged on the shell body relative to the crushing cavity and a discharging hole is arranged on the shell body relative to the feeding impeller.

Description

The stokehold flour mill

Technical field

The utility model relates to the stokehold flour mill, in particular, relates to a kind of stokehold flour mill that is applicable to the medium small boiler of 4～35t/h.

Background technology

Pulverized coal preparation system is the important component part of pulverized-coal fired boiler, and flour mill then is the main equipment of pulverized coal preparation system.Warehouse formula and direct-firing two kinds in the middle of pulverized coal preparation system is divided into.Direct-firingly promptly directly send in the stove without storing in stokehold powder process.Industrial Boiler often adopts unit pulverized-coal system.Flour mill in the unit pulverized-coal system is the fan mill of one for collection powder process, powder feeding, multiple function such as wind of conveying.Its advantage be simple in structure, take up an area of little, but the impeller abrasion is very fast, 2～3 weeks promptly need be changed the blade on the impeller.And only be used for jumbo coal-powder boiler (greater than 35t/h).Units such as China Coal Research Institute last the several years stand-alone development and go out " efficient industrial coal powder boiler system ", and implement on Shandong, Shanxi and other places.Greatly improved boiler thermal output, the SO that produces in the combustion process ₂, NO _XContent is low, and flue dust adopts sack cleaner, and concentration of emission is low.But its coal dust is the strange land centralized production.Main with ball mill, Raymond machine pulverizing.The dusty gas treating capacity is big, and production on-site environment is poor.And, cause very big trouble for links such as the allotment of distributing boiler with powder, storing.Many medium-sized and small enterprises in all parts of the country have in addition also been developed some flour mills, and major defect is that wear-out parts such as powder delivery coarse size, tup are not durable, and cause flour mill often to change the part maintenance, make boiler normally heat supply continuously.

Summary of the invention

The utility model is exactly at the problems referred to above, provides a kind of simple in structure, and discharging is thin, is applicable to the stokehold flour mill of the medium small boiler of 4～35t/h.

For reaching above-mentioned purpose of the present utility model, the utility model adopts following technical scheme, the utility model comprises support, support is provided with drive unit and housing, it is characterized in that being divided into crushing chamber and feeding chamber two parts by the dividing plate with through hole in the housing, the main shaft that links to each other with drive unit passes crushing chamber and the feeding chamber is arranged on the housing; Main shaft in the crushing chamber is provided with the plum blossom frame that two or more have pivoted arm, be provided with the hammer axle between the end of the pivoted arm of plum blossom frame and plum blossom frame, the hammer axle is gone up by being provided with tup around the connecting rod of its rotation, is provided with the lining roller corresponding to tup in the crushing chamber; Main shaft in the feeding chamber is provided with feed rotor, is provided with charging aperture corresponding to crushing chamber on the housing, is provided with discharging opening corresponding to feed rotor.

The beneficial effects of the utility model: 1, because the utility model adopts coal dust promptly to make the mode of promptly sending, thereby machine parts such as feed bin, deduster and external blower fan are not set, adopt direct-firing powder feeding, dwindled volume, structure is also comparatively simple, and the medium small boiler that can be 4～35t/h continues to provide coal dust.Thereby having solved coal dust causes many allotments, stores and transports the trouble on the link with powder the distributing boiler because of the strange land centralized production.

2, housing of the present utility model is divided into crushing chamber and feeding chamber two parts with dividing plate, and feed rotor is arranged on the main shaft, thereby makes structure more simple, compact.During main axis rotation, drive the pivoted arm rotation of plum blossom frame, pivoted arm drives tup and revolves round the sun around main shaft, thereby will smash than gathering coal; Tup also can further grind less material by collision, friction with the lining roller by connecting rod around the rotation of hammer axle; In addition, plural plum blossom frame is set, then the tup number between plum blossom frame and the plum blossom frame is two or more, bigger like this coal cinder falls within first tup place, after tup smashes it, owing to there is beam wind to flow in the housing, make thinner coal dust be blown to next tup place, the rest may be inferred by next tup grinding in beginning, be blown into the feeding chamber until coal dust, and bigger coal stays still soon in first tup place continuation grinding; Guaranteed the fineness of discharging.

3, because the main shaft in the housing drives the feed rotor rotation, air get rid of to around, feeding negative pressuren zone occurs in the chamber, and is zone of positive pressure outside the feeding chamber.So from charging aperture enter in the crushing chamber air by the through hole on the dividing plate laterally flow in the feeding chamber feed rotor middle part and by impeller get rid of to around zone of positive pressure after by discharging opening ejection spiral case outside, enter burner.Therefore, powder process tail gas needn't purify and together send in the stove with coal dust as a wind, has avoided the pollution to environment.

Description of drawings

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

Fig. 2 is the vertical view of Fig. 1.

Fig. 3 is the structural representation of tup.

Fig. 4 is the left view of Fig. 3.

Fig. 5 is the structural representation of plum blossom frame.

1 is that housing, 2 is belt pulley for crushing chamber, 23 for spacer, 22 for hammer axle, 21 for feeding chamber, 20 for base, 18 motors, 19 for drive unit, 17 for belt, 16 for lower house, 15 for back casing, 14 for scum pipe, 13 for charging aperture, 12 for procapsid, 11 for main shaft, 10 for plum blossom frame, 9 for connecting rod, 8 for tup, 7 for discharging opening, 6 for lining roller, 5 for pivoted arm, 4 for feed rotor, 3 in the accompanying drawing.

The specific embodiment

The utility model comprises support 17, support 17 is provided with drive unit 16 and housing 1, be divided into crushing chamber 22 and feeding chamber 19 two parts by the dividing plate with through hole in the housing 1, the main shaft 9 that links to each other with drive unit passes crushing chamber 22 and feeding chamber 19 is arranged on the housing 1; Main shaft 9 in the crushing chamber 22 is provided with at least two plum blossom framves 8 with pivoted arm 3, be provided with hammer axle 20 between the end of two plum blossom framves, 8 pivoted arms 3, by being provided with tup 6, be provided with lining roller 4 corresponding to tup 6 in the crushing chamber 22 on the hammer axle 20 around the connecting rod 7 of its rotation; Main shaft 9 in the feeding chamber 19 is provided with feed rotor 2, is provided with charging aperture 11 corresponding to crushing chamber 22 on the housing 1, is provided with discharging opening 5 corresponding to feed rotor 2.

Described lining roller 4 surfaces are provided with rib, are easy to the pulverizing to coal cinder.

Described housing 1 comprises upper shell and lower house 14, and lower house 14 is provided with scum pipe 12; Can draw out the foreign material that to pulverize in the coal by scum pipe 12, as iron etc.

Described upper shell is constituted by an active connection by procapsid 10 and back casing 13, and described discharging opening 5 is arranged on the procapsid 10, and back casing 13 dismountings easily, and are comparatively convenient during parts such as replacing, maintenance tup 6.

Described drive unit 16 comprises motor 18, and motor 18 links to each other with belt pulley 23 by belt 15 with main shaft 9.

Described tup 6 adopts spring steel to make; Behind tup 6 one surface wears, tup 6 oppositely can be installed and used, two working face is fully utilized, working need not more renew tup 6 in about three months.

Spacer 21 can be set on the main shaft 9 between the described plum blossom frame 8 isolates plum blossom frame 8.

During the utility model operation, motor 18 drives main shaft 9 by belt pulley 23 and rotates.Coal cinder by batcher (not shown) controllably from the side charging aperture 11 enter the crushing chamber 22 of housing 1, simultaneously air also from the side charging aperture 11 enter in housing 1 crushing chamber 22.Because housing 1 opposite side feeding chamber 19 inner main axis 9 drive feed rotors 2 rotations, air get rid of to around, 19 middle parts, feeding chamber form negative pressuren zone, and form zone of positive pressure around the feeding chamber 19.So from charging aperture 11 enter in the crushing chamber 22 air by the hole in the middle of the dividing plate laterally flow into opposite side feed rotor 2 middle parts and by feed rotor 2 get rid of to around zone of positive pressure after discharging opening 5 by discharging opening 5 ejection feeding chambeies 19 enter burner (not shown).Because main shaft 9 rotations, the plum blossom frame 8 and the hammer axle 20 on the plum blossom frame 8 that drive in the crushing chamber 22 together rotate, and the tup 6 on the hammer axle 20 both can revolve round the sun together with main shaft 9, clashed into, pushed and pulverize with 4 pairs of bigger material grains of lining roller of arranging on the housing 1 crushing chamber 22 inboard discs.Tup 6 also can hammered rotation on the axle 20 into shape simultaneously, grinds than granule with 4 pairs on roller of lining.Because the air-flow lateral flow is flowed into next pulverizing section by the granule in the comminuting matter with air-flow and proceeds to pulverize, larger particles is then stayed this section continuation and is pulverized.Pulverize section through each like this and repeatedly pulverize repeatedly, all flow in the feeding chamber 19, under feed rotor 2 centrifugal actions, be dumped into zone of positive pressure and spray outside the housing 1 and enter burner with air-flow with air-flow until material.For the foreign material such as iron block of sneaking in the coal, can in the scum pipe 12 of lower house 14 bottoms, draw out after waiting to stop to feed in raw material.Can realize by adjusting main shaft 9 revolutions and feed rotor 2 radial dimensions for the discharging fineness.

Claims

1. stokehold flour mill, comprise support (17), support (17) is provided with drive unit (16) and housing (1), it is characterized in that: is divided into crushing chamber (22) and feeding chamber (19) two parts by dividing plate in the housing (1), passes crushing chamber (22) and feeding chamber (19) are arranged on the housing (1) with the continuous main shaft (9) of drive unit with through hole; Main shaft (9) in the crushing chamber (22) is provided with at least two plum blossom framves (8) with pivoted arm (3), be provided with hammer axle (20) between the end of two plum blossom frame (8) pivoted arms (3), hammer axle (20) is gone up by being provided with tup (6) around the connecting rod (7) of its rotation, is provided with lining roller (4) corresponding to tup (6) in the crushing chamber (22); Main shaft (9) in the feeding chamber (19) is provided with feed rotor (2), and housing (1) is gone up and is provided with charging aperture (11) corresponding to crushing chamber (22), is provided with discharging opening (5) corresponding to feed rotor (2).

2. stokehold according to claim 1 flour mill is characterized in that: described lining roller (4) surface is provided with rib.

3. stokehold according to claim 1 flour mill is characterized in that: described housing (1) comprises upper shell and lower house (14), and lower house (14) is provided with scum pipe (12).

4. stokehold according to claim 3 flour mill is characterized in that: described upper shell is constituted by an active connection by procapsid (10) and back casing (13), and described discharging opening (5) is arranged on the procapsid (10).

5. stokehold according to claim 1 flour mill is characterized in that: described drive unit (16) comprises motor (18), and motor (18) links to each other with belt pulley (23) by belt (15) with main shaft (9).

6. stokehold according to claim 1 flour mill is characterized in that: described tup (6) adopts spring steel to make.

7. stokehold according to claim 1 flour mill is characterized in that: the main shaft (9) between the described plum blossom frame (8) is provided with spacer (21).