吉林快三走势图表跨度
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吉林快三的和值走势图:水力旋流器凈化裝置的工業油從細分散固相的三元合金2_圖文

吉林快三走势图表跨度 www.dkkczn.com.cn I F R AI N N O M TO
HYDROCYCLONE INDUSTRIAL
SOLID PHASE

UNIT FROM
A

FOR

PURIFICATION

OF

OIL
OF

A FINELY
ALLOY

DISPERSED

TERNARY

I. A. Manannikov

and

V. I .

Baturov

UDC 621.928.4 : 665.1.036

With the granulation of a t e r n a r y alloy consisting of lead, cadmium, and sodium, in the oil medium there is f o r m e d a finely d i s p e r s e d solid phase which, together with the oil, p a s s e s into traps, where it is partially collected. F r o m the traps, the not completely purified oil is sent by vacuum pumps to tanks for purification. The content of the finely d i s p e r s e d solid phase of the t e r n a r y alloy in the oil, depending on the g r a n u l a tion conditions, r e a c h e s 50 g / l i t e r . The main p a r t of the finely d i s p e r s e d phase of the t e r n a r y alloy has the following p a r t i c l e - s i z e composition: 8% p a r t i c l e s with a size of 0.6-0.2 m m ; 3870 p a r t i c l e s with a size of 0.2-0.05 m m ; 6470 particles with a size of 0.05-0.0125 m m . The finely d i s p e r s e d phase entrained with the oil settles out on the walls of the pipelines, which leads to clogging of the latter. In addition, accumulating on the walls of the coolers, it breaks down the h e a t - t r a n s f e r conditions between the oil and the cooling agent. With the aim of increasing the s e r v i c e life of the c o o l e r s by d e c r e a s i n g the e r o s i o n of the tubes, as well as of lowering the expenditure of labor for cleaning the pipelines and tanks from the deposited finely dispersed solid phase, the D z e r z h i n s k Branch of the S c i e n t i f i c - R e s e a r c h Institute for Chemical Machinery has developed the engineering scheme of a unit for the purification of industrial oil f r o m a finely d i s p e r s e d solid phase of a t e r n a r y alloy; the principal pieces of apparatus of the scheme are the traps, a centrifugal pump, a battery of hydrocyclones, and a r e c e i v e r for the pure oil. F r o m the trap 1 (see Fig. 1), the oil contaminated by a finely d i s p e r s e d phase of a t e r n a r y alloy is fed by the pump 7 under a p r e s s u r e up to 4 k g f / c m ~ into the feeding collector 2 and is distributed to the hydrocyclones 5. F r o m the r e c e i v e r 6 the thickened finely d i s p e r s e d phase of the t e r n a r y alloy is sent to disposal; the pure oil from the hydrocyclones 5 e n t e r s the collector 3, and is withdrawn through the connecting pipe 4 for further
uSe.

The principal m a t e r i a l of construction of the hydrocyclone unit is steel St3 (main subassemblies). The cones of the hydrocyclones are made by the method of casting under p r e s s u r e from high-strength and heatr e s i s t a n t polycarbonate, which withstands a t e m p e r a t u r e of the working medium up to +150~ Tests of the unit were made with a t e m p e r a t u r e of the oil up to 60~ a viscosity of the oil of 17-23 cS, and a density of 0.876 g / c m 3. The solid phase has a density of 3.5 g / c m 3. During the tests, samples were withdrawn for analysis for the content of the finely d i s p e r s e d phase of the t e r n a r y alloy in the starting, c l a r i fied, and thickened flows.

.4

Fig. 1. Scheme of hydrocyclone unit. T r a n s l a t e d f r o m Khimicheskoe i Neftyanoe Mashinostroenie, No. 3, p. 44, March, 1978.

0009-2355/78/0304-0277507.50

9 1978 Plenum Publishing Corporation

277

T e c h n i c a l C h a r a c t e r i s t i c s of Unit Capacity, l i t e r / h . . . . . . . . . . . . . . . . . . . . . . . . P r e s s u r e at inlet, k g f / c m 2 . . . . . . . . . . . . . . . . . . N u m b e r of h y d r o c y e l o n e s . . . . . . . . . . . . . . . . . . . P a r a m e t e r s of h y d r o c y e l o n e s , ram" d i a m e t e r of c y l i n d r i c a l p a r t . . . . . . . . . . . . . . . length of h y d r o c y c l o n e . . . . . . . . . . . . . . . . . . . d i a m e t e r of i n l e t opening . . . . . . . . . . . . . . . . . d i a m e t e r of i n t e r c h a n g e a b l e overflow pipe . . . . . d i a m e t e r of i n t e r c h a n g e a b l e sand pipe . . . . . . . . Angle of h y d r o c y c l o n e cone, deg . . . . . . . . . . . . . . 30,000 4-5 12 40 860 8-10 10-12 4-6 5

The r e s u l t s of an a n a l y s i s showed that the h y d r o c y c l o n e unit m a k e s it p o s s i b l e to p u r i f y i n d u s t r i a l oil with a content of the f i n e l y d i s p e r s e d t e r n a r y a l l o y in the pure oil of 0.5-2 g / l i t e r . The a p p a r a t u s w o r k s e f f i c i e n t l y and r e l i a b l y . An e x p e r i m e n t a l - p r o d u c t i o n e x a m p l e of the unit, b u i l t in the S c i e n t i f i c - R e s e a r c h I n s t i t u t e for C h e m i c a l M a c h i n e r y , is p r e s e n t { y working s u c c e s s f u l l y in p r o d u c t i o n .

MRK

HELIUM

CRYOSTAT
UDC 621.642.1 : 536.541

Zh. L. Levina, Yu. A. Miroslavskaya, A. I. Vinnikov, V. G . B a r a n o v , and M. I. Gutkin

The MRK c r y o s t a t is d e s i g n e d f o r the l i q u i d - h e l i u m cooling of r e c e i v e r s of i n f r a r e d and s u b m i l l i m e t e r r a d i a t i o n d u r i n g a s t r o p h y s i c a l i n v e s t i g a t i o n s . The t h e r m o s t a t t i n g time in the working p e r i o d is 30 min; during the p e r i o d of the p r e p a r a t i o n of the c r y o s t a t f o r work, liquid helium is f i l l e d into it. The c r y o s t a t ( F i g . 1) c o n s i s t s oi an i n t e r n a l (helium) v e s s e l and a j a c k e t . The i n s u l a t i o n of the helium c a v i t y is v a c u u m / m u l t i l a y e r , with one m e t a l l i c shield, cooled by the d e p a r t i n g h e l i u m v a p o r s . The helium v e s s e l is s u s p e n d e d in the j a c k e t on a long t h i n - w a l l e d tube with d i m e n s i o n s of 48 ? 0.4 m m , m a d e of s t a i n l e s s s t e e l . The t r a n s v e r s e loads a r e taken up through a s u p p o r t m a d e of g l a s s p l a s t i c . The s u p p o r t is in c o n t a c t with the j a c k e t at one point. In the housing of the c r y o s t a t there is a flange f o r connection of the light guide, which c o n s i s t s of a thinw a l l e d tube m a d e of s t a i n l e s s s t e e l , with a p o l i s h e d i n t e r n a l s u r f a c e , and a r a d i a t i o n r e c e i v e r , s i t u a t e d at the lower end of the tube. The window of the light guide is c l o s e d by a L a v s a n (polyethylene t e r e p h t h a l a t e fiber) f i l m . The c r y o s t a t is p r o v i d e d with a pipe f o r the filling of liquid helium, pipes f o r the d i s c h a r g e of the g a s , an e l e c t r o m a g n e t i c valve (for r e m o t e c o n t r o l of the c l o s i n g of the d i s c h a r g e line), and a s a f e t y m e m b r a n e , c a l i b r a t e d for an e x c e s s r u p t u r e p r e s s u r e of 0.28-0.32 MPa. The i n t e r n a l v e s s e l and the j a c k e t a r e m a d e of s t a i n l e s s s t e e l , and the s h i e l d of c o p p e r . T e c h n i c a l C h a r a c t e r i s t i c s of MRK C r y o s t a t Volume, l i t e r s . . . . . . . . . . . . . . . . . . . . . . . . Maximal excess pressure, MPa ............ L o s s e s due to e v a p o r a t i o n , % p e r d a y . . . . . . . . . M a s s of e m p t y c r y o s t a t , kg . . . . . . . . . . . . . . . Overall dimensions, mm: diameter .......................... height . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 0.25 Not m o r e than 40 15 310 630

The liquid helium is f i l l e d into the c r y o s t a t through the filling pipe f r o m a l i q u e f i e r , or f r o m STG-25 or STG-40 helium v e s s e l s , using a siphon f o r m i n g p a r t of the d e l i v e r y package of the c r y o s t a t . The g a s e s f o r m e d a r e r e m o v e d through a d i s c h a r g e pipe D r = 8 m m and an e l e c t r o m a g n e t i c valve D r = 2 m m . T r a n s l a t e d f r o m K h i m i c h e s k o e i Neftyanoe M a s h i n o s t r o e n i e , No. 3, p. 45, M a r c h , 1978. 278 0009-2355/78/0304-0278507.50 9 Plenum Publishing Corporation


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