SU1618801A1 - Method and apparatus for treating fibrous supension - Google Patents

Description

The process is reliable, stable

Low washing efficiency

Process is steady

1618801

eight

Continuation of table 1

Consumer and output specifications

Claims (3)

Claim 1. A method of processing a fibrous suspension by washing and bleaching while passing it with a processing solution between perforated cylindrical ·! sieves and waste disposal. filtrate, characterized in that, in order to intensify and increase the processing efficiency, at the moment of passage of the suspension between the perforated sieves, pulsating influences are applied to it coming from the side of the spent filtrate discharge with an intensity of _{h of a} volume pulse of 0.1 8 , 0 No. per 1 ton of absolute dry fiber and with a frequency of 1-10 times in 1 min. 2. A device for processing a fibrous suspension, including a housing, nozzles for introducing and withdrawing a fibrous suspension, perforated cylinder sieves for filtering the treatment solution and filtrate, a collection of spent filtrate, pipelines for supplying the treatment solution and drainage of the filtrate, characterized in that, for the purpose of intensification and increase the efficiency of processing, on a sieve for filtering the processing solution a, guide visors made in the form of hollow, truncated cones 15-45 ° are rigidly fixed, and a filtrate discharge pipe has a rod installed to create a pulsation of liquid. Table 1 Example The volumetric pulse intensity, m ³ / t a.s.v. Pulsation frequency, times / min The value of the angle of the truncated cone, degrees Suspension Flushing Results fibrous Washing efficiency, % Rinsing water consumption, m ³ / t I. · S · in · The number of selected filtrate, m ^e / t a. from . in . Reliability, process stability 1 3.0. 2 fifteen 74.5 8.8 9.2 The process is reliable, steady 2 0.1 1 10 72.0 9.1 9.0 Low flushing efficiency 3 0, 1 1 fifteen 74.0 8.9 9.0 The process is steady chi in - 1618801. 7 8 Continuation of table 1 , With 'measures The volumetric pulse intensity, m ³ / t 3 · s "in · Pulsation frequency, times / min The value of the angle of the truncated cone, deg Flushing Process Results fibrous Reliability,. process stability Flushing efficiency, % suspensions Flushing flow rate, m ³ / t 3 "s" in The number of selected filtrate, m ³ / t a. from. in. 4 3.0 2 28 74.5 8.5 9.1 5 6.0 2 45 78.0 7.0 10.5 6 1 3.0 2 fifty 71.0 9.0 8.5 Rinsing efficiency decreases 7 8.0 4 45 80.0 6.5. 12.0 The process is robust and reliable. 3 9.0 4 45 70.0 8.9 8.0 Filtrate withdrawal decreases 9 3.0 10 45 81.0 6.5 12.5 The process is reliable and efficient. 10 6 eleven 45 70.0 8.0 7.5 The process is unstable, the selection of filtrate is small. eleven 0.05 1 45 65.0 9.0 6.5 Poor filtrate selection 12 0.1 0.5 45 61.0 10.0 6.5 - table 2 Consumer and output specifications prototype inventions Rinsing water consumption, m ³ / t Power consumption, kW) h / t The washing efficiency in one step,% Rinsing water consumption, m ³ / t Electric power consumption, kW. h / t The washing efficiency,% 7 * 3 - 9.0 30-45 78.0-80.0 6.5-9 30-40 81.0 • Compiled by I. Karandeyev