CN2743711Y - Flow guiding type biexhaust pipe low resistance cyclone dust collector - Google Patents

Abstract

The utility model discloses a flow guiding type biexhaust pipe low resistance cyclone dust collector. A gas inlet flow guiding device 1 is installed in a gas inlet 11. An exhaust line flow guiding device 3 is installed in an upper exhausting opening 9. A lower exhaust line flow guiding device 3 is installed in a lower exhausting opening 4. An ash-deposited bucket 8 is inserted into a lower exhaust line 7. The interior of the cyclone cylinder 10 is provided with an anti-blow cone 6. The cyclone dust collector is conducted with the technical measures of enhancing structure, guiding flow and dropping pressure, anti-dust and anti-blow, etc. by the utility model. Compared with the resistance of the single exhaust pipe cyclone dust collectors, the system resistance loss of the utility model is reduced by about 35%-40%. The dust collection efficiency of the flow guiding type biexhaust pipe low resistance cyclone dust collector is obviously higher than the single exhaust pipe cyclone dust collectors under the same condition of inlet air speed.

Description

Flow guiding type biexhaust pipe low resistance state cyclone dust collectors

Affiliated technical field

The utility model relates to a kind of cyclonic separation dust arrester, especially flow guiding type biexhaust pipe low resistance state cyclone dust collectors.

Background technology

Cyclonic separation is commercial Application one of flue gases purification the most widely.For many years, the scientific research personnel has done a large amount of research to the moving law of the two phase flow that the structure of cyclone dust collectors and internal gas flow running status thereof and solid particles are formed, and develop many well behaved cyclone dust collectors (as types such as CLT, XLP and CLK), though some performance indications makes moderate progress, but because the structure of deduster itself is not done bigger improvement, so the raising of the reduction of its pressure loss and dust-collecting efficiency is desirable not enough.Because the caused turbulent flow of vortex gas of whirlwind tube bottom, make separated solid particle be back to the inward turning air duct the center interior vortex gas field and get rid of deduster, cause efficiency of dust collection low.It is that the centrifugal force that utilizes swirling eddy to produce is separated particle from air-flow.

Summary of the invention

At the above-mentioned defective that common cyclonic separation dust arrester exists, the utility model provides a kind of flow guiding type biexhaust pipe low resistance state cyclone dust collectors.

The technical scheme that its technical problem that solves the utility model adopts is: 11 places install air inlet guiding device 1 additional at air inlet, last exhaust outlet 9 places add and load onto blast pipe guiding device 3, following exhaust outlet 4 places add and load blast pipe guiding device 5, the flue-dust retainer 8 of lower end inserts blast pipe 7, and an anti-channeling circular cone 6 is equipped with in whirlwind tube 10 inside.

The beneficial effects of the utility model are, because cyclone dust collectors have been carried out structure optimization, water conservancy diversion and step-down and technical measures such as dustproof and anti-channeling, the SR loss of flow guiding type biexhaust pipe low resistance state high efficiency cyclonic dust collector reduces about 35% ~ 40% than single tracheae cyclone dust collectors (as the CLT type) resistance; Under same import wind friction velocity, the dust-collecting efficiency of the deduster after the improvement is apparently higher than the single row of tubes cyclone dust collectors; When the import wind speed reached 22.5m/s, efficient can reach 96.7%, and its pressure loss (SR) reduces about 40% than CLT type.The result of the test of the import wind speed and the pressure loss and dust-collecting efficiency is as shown in table 1.

The table 1 import wind speed and the pressure loss and dust-collecting efficiency

Import wind speed (m/s)		12	14	16	18	21	22.5
								The pressure loss (Δ P/pa)	Twin exhaust pipes (no water conservancy diversion)	460	680	920	1000	1610	1760
Twin exhaust pipes (water conservancy diversion is arranged)	360	550	760	850	1330	1400
							CLT		460	700	1020	1210	1800	2030
Dust-collecting efficiency (Δ P/pa)	Twin exhaust pipes (no water conservancy diversion)	83.7	84.4	85.3	87.8	88.5									89.8
							Twin exhaust pipes (water conservancy diversion is arranged)	93.4	94.6	95.2	95.8	96.3	96.7
	CLT	78.3	80.2	81.4	83	83.5								84

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is the utility model structural representation.

1. air inlet guiding devices are 2. gone up blast pipe among the figure, 3. go up the blast pipe guiding device, 4. descend exhaust outlet, 5. descend the blast pipe guiding device, and 6. the anti-channeling circular cone 7. descends blast pipe, and 8. flue-dust retainer is 9. gone up exhaust outlet, 10. whirlwind tube, 11. air inlets.

The specific embodiment

1, structure optimization

The cut diameter of cyclone dust collectors can be calculated by following formula:

$d_c=\sqrt{\frac{18\mathrm{\μ}{u}_{r0}{r}_c}{{\mathrm{\ρ}}_c{u}_{t0}^2}}$

In the formula: the dynamic viscosity of μ-air, P _aS; r ₀-cut apart the radius of screen cloth, m;

u _R0-cut apart the air-flow radial velocity on the screen cloth face of cylinder, m/s; ρ _c-dust density, kg/m ³

u _R0-cut apart the air-flow tangential velocity on the screen cloth face of cylinder, m/s.

d _cMore little, the efficiency of dust collection of cyclone dust collectors is high more.Each building block of cyclone dust collectors being optimized design by working condition requirement, making the running parameter of deduster reach optimum value, is minimum with efficiency of dust collection height, the pressure loss that guarantees system.

2, water conservancy diversion and step-down

In order to reduce the system pressure loss, at first the air inlet 11 at deduster installs the air inlet guiding device additional, to alleviate or to prevent " contracted flow " that the air inlet place produces, the pressure loss of system is reduced.The flue-dust retainer 8 of deduster lower end inserts blast pipe 7, and a part of purified gas of deduster inside is therefrom derived; In addition, also install guiding device respectively additional, " contracted flow " that import department produces from reducing the consumption of gas kinetic energy, the pressure loss of system is reduced to alleviate or to prevent at air inlet 11 and last exhaust outlet 9, following exhaust outlet 4 places of deduster.

Secondly, on original one of cyclone dust collectors, on the basis of blast pipe 2, increase a following blast pipe 7.Not only directly increased the exhaust outlet area, and the turbulent flow elimination that the upper and lower in the whirlwind tube 10 can be occurred, having reduced system pressure, dust-collecting efficiency also is improved.

The 3rd, exhaust outlet 9, following exhaust outlet 4 places also install exhaust diversion device simultaneously additional on deduster, in the inducer flow area that increases blast pipe, make the gas that moves in a circle around the blast pipe become rectilinear motion in the blast pipe very swimmingly, air-flow is low in the kinetic energy consumption of upper and lower blast pipe porch like this, further reaches the purpose that reduces resistance.

3, dustproof and anti-channeling

At first the size of blast pipe on the deduster 2 is adjusted, prevented that dusty gas and purified gas from the gas circuit short circuit occurring at the inlet of deduster and the exit of last blast pipe 2; Secondly the appropriate location of deduster inside increases an anti-channeling circular cone 6, prevents that back mixing appears in the following dust of decanting zone b in the deduster, and is pulled away from blast pipe by interior rotational gas flow.

Claims (1)

1, a kind of flow guiding type biexhaust pipe low resistance state cyclone dust collectors comprise tornadotron, blast pipe, flue-dust retainer etc., it is characterized in that:

Locate to install additional air inlet guiding device (1) at air inlet (11), last exhaust outlet (9) is located to add and is loaded onto blast pipe guiding device (3), following exhaust outlet (4) is located to add and is loaded blast pipe guiding device (5), the flue-dust retainer of lower end (8) inserts blast pipe (7), and an anti-channeling circular cone (6) is equipped with in whirlwind tube (10) inside.

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