SU1562313A1 - Method of filling container with electrization liquid - Google Patents

Abstract

The invention relates to the storage of liquid in containers and can be used when filling containers with electrifying liquid. The aim of the invention is to intensify and ensure the safety of the filling process. The method of filling the tank with an electrifying liquid is that the fluid stream is divided into separate streams and the tank is filled with these streams, and the flow separation is based on the achievement of the minimum density of electrostatic charges in the separated streams, defined by the formula MINΣ _I-1 ρ _I Q _I / Q≤ρ _dop , where N is the number of separated flows

QI - fluid flow in the I - m stream

Q - total fluid flow rate in N streams

ρ _I is the density of electrostatic charges introduced by the liquid of the first flow into the tank

_additional ρ - density allowable electrostatic charge, the liquid introduced into the container during filling the liquid flow rate Q. 1-yl.

Description

The invention relates to the field of storage of liquids in containers and can be used to fill tanks with an electrifying liquid, mainly oil and oil products, with preventing the formation of electrostatic charges.

The aim of the invention is to intensify and ensure the safety of the filling process.

The drawing shows the scheme of filling the tank.

The flow separation system for filling tank 1 consists of supply lines 2 and 3, valves 4 and 5 and main pipeline 6

The separation of the flow is carried out on the condition that, in the separated flows, the minimum density of electrostatic charges, determined by the formula

11 o

T1P I: O, - ODOP

w Q

wheredep is the number of spilled flows. Q is the fluid flow in the I-M flow, Q is the total fluid flow in the n flows,

p is the density of electrostatic charges introduced by the liquid of the 1st flow into the tank,

rdop is the allowable density of electrostatic charges introduced by a liquid into a container when it is filled with a liquid flow rate. Q The method is carried out as follows.

For tank 1, which is designed to receive fluid with flow rate Q, the allowable volumetric flow rate of the tank fill through the main pipeline Q yum is determined by calculation.

the flow rate Q a will be less than the required flow rate Q, then the fluid electrified in the main pipe 6 is divided into n streams, for example, by supplying

01 0

00

OE

piping 2 and 3. The diameter and length of the supply piping and the flow in them are chosen such that the charge density in the fluid entering the tank with a total flow rate Q is minimal and does not exceed the allowable density fao ", determined, for example, by calculation . The flow rates QI and Q2 in pipelines 2 and 3 are installed by means of valves 4 and 5. Then, tank 1 is filled with flow rate Q Qi + Qr B in main pipe 6. In this case, the safety of the filling process is ensured by the fact that the charge density in the liquid entering the tank through the supply pipes, p, does not exceed the allowable value of rdop.

The system of separation of the flow of electrified liquid allows the repeated and subsequent filling of the reservoir with the same liquid with the flow rate Q with its further operation.

Example. The tank with a diameter of m and a height of m is designed to receive gasoline B-70 with a relative dielectric constant, specific volume electrical conductivity, kinematic viscosity v 0.65-1 (G6 m2 / s and temperature 7 298 K through a pipeline 4 ms in diameter, 3 m3 / s. The minimum ignition energy for gasoline vapor is B-70 WvH ". 1.5-1 (G4J.

According to the current methodology, the allowable safe flow rate of filling the tank with gasoline B-70 through a pipeline with a diameter of 0.4 m is l 12 m3 / s, which is much less than the required flow rate Q 0.3 m 3 / s. Therefore, it is necessary to reduce the charge density in the liquid entering the reservoir to an acceptable value. The permissible density of charges introduced by gasoline into the tank, at a flow rate of 3 m3 / s, calculated by the current method is equal to 5942 -10 7Cl / m3.

To reduce the charge density in the injected fluid, the fluid that is electrified in the main pipeline is divided into separate streams using feed lines. Given the number and diameters of the supply pipelines, 4 m, dz -0.7 m, ensure compliance with the conditions

2L (A) b; l frdop

where B is a coefficient, 6553-.

Get 0,, 3355.

The costs Q ,, corresponding to the minimum density of charges minp introduced into the reservoir are determined by the dependencies:

AShmz

, 041;

d $ C3

jJ.

The lengths of the supply pipelines are determined by the dependence

 A-A-g

((L

l

-2

, Ґ.

0

five

0.0492,

-0.1 725 Ј,

+

Sh (139341-24513) e

+ 2.4513) (13.9341-2.4513) X 0.5942-

Hyo

-0.0840 /,

+ 2.4513 0, 6532 107 (0.3)

1.5741 - e ° - | 725 + 9.9087- ° -0840 0.1487, m, m.

Thus, the flow of gasoline electrified in the main pipeline with a diameter d is divided into two flows with flow rates Q, 0.041 m3 / s and 259 m3 / s using two supply pipelines with diameters 4 m, 7 m and lengths | 30 m, m, fill the tank with the gasoline consumption in the main pipeline, 3 me / s. In this case, the density of the charges introduced by the liquid into the reservoir is minimal and does not exceed the permissible value.

rdop

Compared with the known methods of filling with electrified liquids, the proposed method allows to intensify the process of filling the containers by increasing the filling capacity with electrostatic safety.

0

Claims (1)

Invention Formula The method of filling the tank with an electrifying liquid, which consists in separating the fluid flow into separate streams and filling the tank with these streams, characterized in that, in order to intensify and ensure the safety of the filling process, the flow separation is carried out on the basis of achievement in divided streams minimum density of electrostatic charges, determined by the formula H q min Z p,,  Q wheredep is the number of separated flows; 0 Q, is the fluid flow rate in the rth stream; Q is the total fluid flow rate in n flows; p is the density of electrostatic charges introduced by the liquid of the ith stream into the container; rdop is the allowable density of electrostatic charges introduced by a liquid into a container when it is filled with a liquid flow rate Q. &, nh