CN201978824U

CN201978824U - Novel fine powder separator

Info

Publication number: CN201978824U
Application number: CN2010206901475U
Authority: CN
Inventors: 司军; 武书义; 刘钊
Original assignee: HENAN WHARTON ELECTRIC POWER EQUIPMENT ENGINEERING Co Ltd
Current assignee: HENAN WHARTON ELECTRIC POWER EQUIPMENT ENGINEERING Co Ltd
Priority date: 2010-12-30
Filing date: 2010-12-30
Publication date: 2011-09-21
Anticipated expiration: 2020-12-30

Abstract

The utility model discloses a novel fine powder separator which comprises a central pipe, a cylinder body, a lower cone, a powder collecting cylinder and an air locking device, wherein the cylinder body is arranged in a spirally-downward way and located at the outer part of the central pipe; the lower end of the cylinder body is connected with the lower cone; the powder collecting cylinder and the air locking device are arranged at the lower end of the lower cone; an air exhaust port is arranged upwards at the top end of the central pipe, and a backflow port is arranged towards one side; and inner cones are arranged at the inner part of the lower cone in a spaced way. Coal dust in a gas-powder mixture is thrown onto the inner wall of the cylinder body under the centrifugal action and then falls into a powder collecting chamber along gaps between the lower cone and the inner cones; as most of the separated coal dust flows away from the gaps between the lower cone and the inner cones, air flow which continuously rotates downwards along the inner cones is purified, the quantity of fine powder carried by gas flowing upwards is reduced, the powder content is greatly reduced and the quantity of powder carried by the gas returning to a vortex flowing upwards is greatly reduced; therefore, the separating efficiency and effect are improved.

Description

A kind of novel pulverized-coal collector

Technical field

The utility model belongs to powder separation equipment technical field, particularly a kind of novel pulverized-coal collector.

Background technology

The pulverized-coal collector import has two kinds, the dextrorotation that the left-handed and clockwise direction that primary mixture counterclockwise enters when promptly overlooking enters, its structural principle is: enter primary mixture by pulverized-coal collector upper end edge tangential direction, top-downly between cylindrical shell and central tube, rotate downwards, pulverized coal particle is thrown toward cylinder inboard wall and along the downward cone base landing of wall under action of centrifugal force, when coal dust arrived cone base along with air-flow, gas returned upwards to the separator exhaust outlet and discharges; When gas can produce vortex when exhaust outlet flows, because the attraction of vortex is rolled part coal dust separated, that settle out again, rolled-up coal dust is discharged in the lump with gas, causes separating effect to reduce.

The utility model content

The purpose of this utility model provides a kind of novel pulverized-coal collector of good separating effect.

For achieving the above object, the technical solution of the utility model is: a kind of novel pulverized-coal collector, comprise cylindrical shell, the lower cone of cylindrical shell lower end connection and collection powder tube and the flapper that the lower cone lower end is provided with that central tube, central tube external helicoid are provided with downwards, the central tube top upwards is provided with exhaust outlet, is provided with refluxing opening to a side, and described lower cone internal interval is equipped with inner cone.

The angle α of described cylindrical shell inlet tube and horizontal plane is 15 °-45 °.

The angle α of described cylindrical shell inlet tube and horizontal plane is 26 °.

Be provided with radiation shield in the described lower cone lower port.

Described inlet tube lateral surface is provided with the maintenance hand hole; The cylindrical shell middle part is provided with inspection manhole.

Compared with prior art, the utility model has the advantages that:

1, inner cone is installed at interval in the lower cone upper port, coal dust in the primary mixture is thrown toward cylinder inboard wall under the action of the centrifugal, and be slipped to powder-collecting chamber along the gap of lower cone and inner cone, because most of separated coal dust flows away between two cones, the air-flow that continues to be rotated down along inner cone is purified, reduced the fine powder amount that the flowing gas that makes progress carries, powder containing quantity descends significantly, and gas returns the vortex that upwards flows and carries the powder amount and significantly reduce, thereby has improved separative efficiency and separating effect.

2, be provided with radiation shield in the lower cone lower port, formed specific coal dust stocking angle at the powder outlet circumference, the coal dust of separating is entered in the collection powder tube equably, leaked-in air was gone back by " reflection " on collection powder tube top when flapper was opened, and can not directly enter separated space, avoid flapper gas leakage to cause influence, effectively guarantee separating effect separating effect.

3, the utility model up to more than 95%, when adopting weary gas as tertiary air, because band powder amount obviously reduces, has been brought into play important function to improving the boiler combustion operating mode through field measurement efficient after power plant uses.

Description of drawings

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

Fig. 2 is the left view of Fig. 1 middle and upper part;

Fig. 3 is the vertical view of Fig. 2.

The specific embodiment

As Fig. 1, Fig. 2 and novel pulverized-coal collector shown in Figure 3, it comprises cylindrical shell 1, the lower cone 3 of cylindrical shell 1 lower end connection and collection powder tube 14 and the flapper 15 that lower cone 3 lower ends are provided with that central tube 2, central tube 2 external helicoids are provided with downwards, the inlet tube 9 of cylindrical shell 1 tangentially is provided with along central tube 2, and the angle α of itself and horizontal plane is 15 °-45 °, is convenient to primary mixture and enters.Upwards be provided with exhaust outlet 7, be provided with refluxing opening 8 on central tube 2 tops to a side.Lower cone 3 is inner for powder-collecting chamber 12, lower port are powder outlet 13, in order to reduce the fine powder amount that the flowing gas that makes progress carries, inner cone 4 is installed at interval in lower cone 3 upper port; In lower cone 3 lower port, be provided with radiation shield 10, radiation shield 10 is fixed on the inwall of lower cone 3 by connecting plate 11, formed specific coal dust stocking angle at powder outlet 13 circumference, the coal dust of separating is entered in the collection powder tube 14 equably, leaked-in air was gone back by " reflection " on collection powder tube 14 tops when flapper 15 was opened, and can not directly enter separated space, and avoid flapper 15 gas leakage to cause influence to separating effect, effectively guarantee separating effect.For the ease of maintenance of the present utility model and maintenance, be provided with maintenance hand hole 6 at inlet tube 9 lateral surfaces, cylindrical shell 1 middle part is provided with inspection manhole 5.

In embodiment of the present utility model, the inlet tube 9 of cylindrical shell 1 and preferred 26 ° of the angle α of horizontal plane.

Lower cone 3 not only can capture coal dust with the gap of inner cone 4, but also can make 12 import departments of powder-collecting chamber keep enough static pressure, has both guaranteed that coal dust continues downward landing in lower cone 3 and inner cone 4 gaps, can prevent that again swirling eddy from entering in the powder-collecting chamber 12.

In the utility model work, coal dust in the primary mixture is thrown toward cylindrical shell 1 inwall under the action of the centrifugal, and be slipped to powder-collecting chamber 12 along the gap of lower cone 3 and inner cone 4, because most of separated coal dust flows away between two cones, the air-flow that continues to be rotated down along inner cone 4 is purified, powder containing quantity descends significantly, and gas returns the vortex that upwards flows and carries the powder amount and significantly reduce, thereby has improved separative efficiency and separating effect.

Claims

1. novel pulverized-coal collector, comprise cylindrical shell, the lower cone of cylindrical shell lower end connection and collection powder tube and the flapper that the lower cone lower end is provided with that central tube, central tube external helicoid are provided with downwards, the central tube top upwards is provided with exhaust outlet, is provided with refluxing opening to a side, it is characterized in that described lower cone internal interval is equipped with inner cone.

2. novel pulverized-coal collector as claimed in claim 1 is characterized in that, the angle α of described cylindrical shell inlet tube and horizontal plane is 15 °-45 °.

3. novel pulverized-coal collector as claimed in claim 2 is characterized in that, the angle α of described cylindrical shell inlet tube and horizontal plane is 26 °.

4. as claim 1,2 or 3 described novel pulverized-coal collectors, it is characterized in that, be provided with radiation shield in the described lower cone lower port.

5. novel pulverized-coal collector as claimed in claim 4 is characterized in that, described inlet tube lateral surface is provided with the maintenance hand hole; The cylindrical shell middle part is provided with inspection manhole.