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Accompanying washing oil-free mechanical tank cleaning method

A mechanical and tank cleaning technology, which is applied in the field of mechanical tank cleaning without cleaning oil, can solve the waste of cleaning oil and other problems, and achieve the effect of improving adaptability and reducing consumption

Inactive Publication Date: 2018-10-09
JINAN RUIDONG IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for mechanically cleaning tanks without accompanying cleaning oil in order to overcome the problems in the prior art that lead to follow-up cumbersome processes and a large amount of waste of accompanying cleaning oil.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A method for mechanical tank cleaning without accompanying cleaning oil, comprising the following steps:

[0036] (1) Heat the tank bottom oil steam coil to 60°C to make the tank bottom oil have a certain fluidity, and then pump it through the vacuum (vacuum degree 70KPa) set by the mechanical tank cleaning equipment, with a flow rate of 10t / h. The oil at the bottom of the tank is sucked out, and the pressure is increased to 1.0MPa, and sent to the rotating mechanical spray gun arranged on the tank top and the side wall of the tank. The high-pressure jet is used to force stirring and mixing, so that the place that the coil cannot be heated can also be heated, so that the bottom of the tank The oil is fully flowing;

[0037] (2) As the fluidity of the oil at the bottom of the tank increases and the mixing is even, continue heating to 90°C, and the circulation flow rate of the hot oil reaches 80t / h, so that the hot oil can be mixed and heated at 360 degrees in the tank wi...

Embodiment 2

[0043] A method for mechanical tank cleaning without accompanying cleaning oil, comprising the following steps:

[0044] (1) Heat the tank bottom oil steam coil to 50°C to make the tank bottom oil have a certain fluidity, then use the vacuum suction set by the mechanical tank cleaning equipment to suck the tank bottom oil at a flow rate of 5t / h It is pumped out and sent to the rotary mechanical spray gun arranged on the top of the tank and the side wall of the tank, and the high-pressure jet is used to force stirring and mixing, so that the place that the coil cannot be heated can also be heated, so that the tank bottom oil can fully flow;

[0045] (2) As the fluidity of the oil at the bottom of the tank increases and it is mixed evenly, continue heating to 100°C, and the circulation flow rate of the hot oil reaches 100t / h, so that the hot oil can be mixed and heated at 360 degrees in the tank without any dead angle, completely eliminating the dead angle of heating. This proces...

Embodiment 3

[0051] A process method for mechanically cleaning tanks without accompanying cleaning oil, comprising the following steps:

[0052] (1) Heat the tank bottom oil steam coil to 70°C to make the tank bottom oil have a certain fluidity, then use the vacuum suction set by the mechanical tank cleaning equipment to suck the tank bottom oil at a flow rate of 15t / h It is pumped out and sent to the rotary mechanical spray gun arranged on the top of the tank and the side wall of the tank, and the high-pressure jet is used to force stirring and mixing, so that the place that the coil cannot be heated can also be heated, so that the tank bottom oil can fully flow;

[0053] (2) As the fluidity of the oil at the bottom of the tank increases and it is mixed evenly, continue heating to 80°C, and the circulation flow rate of the hot oil reaches 60t / h, so that the hot oil can be mixed and heated at 360 degrees in the tank without dead ends, completely eliminating the heating dead ends. This proce...

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PUM

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Abstract

The invention relates to the technical field of large crude oil storage tank cleaning in oil refining and chemical industries, and discloses an accompanying washing oil-free mechanical tank cleaning method. The accompanying washing oil-free mechanical tank cleaning method comprises the following steps that (1) tank bottom oil is heated to obtain certain liquidity, then sucked out on a vacuum condition, sent to mechanical injection equipment arranged on a tank body in a pressure increasing manner, and subjected to forced mixing; (2) an operator continues to heat the tank bottom oil to allow hotoil to have a 360-degree no-dead-angle hybrid heating flow in a tank; (3) temperatures and liquid levels of various points in the tank are inspected, and temperature and liquid level variation curvecharts of the various points are drawn; (4) when the temperatures and the liquid levels of the various points tend to be stable, oil is delivered outwards, and hot oil circulation thermal insulation is performed at the same time; and (5) after oil delivery is finished, a water base hot water circle with a maximum circulation volume is established, heavy oil is skimmed out and recovered regularly till no heavy oil can be skimmed out, and thus water-base cleaning is finished. The use of a large amount of accompanying washing oil is avoided and the consumption of cleaning supplemental materials is lowered.

Description

technical field [0001] The invention relates to the technical field of cleaning large-scale crude oil storage tanks in the refining and chemical industry, in particular to a method for mechanically cleaning tanks without accompanying cleaning oil. Background technique [0002] With the improvement of production capacity of refining and chemical enterprises, the storage capacity of crude oil has greatly increased, and the demand for mechanical cleaning of crude oil tank maintenance is increasing day by day. At present, in the early stage of cleaning crude oil storage tanks, light fuel oil that is 2-4 times the amount of sludge at the bottom of the tank needs to be used as accompanying washing oil. The slag mixes to become dirty oil. First, it causes a lot of waste of light finished fuel oil, correspondingly produces a large amount of dirty oil and occupies a large amount of inventory; secondly, it increases the recovery rate of dirty oil in the equipment, and the most import...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B08B9/093B08B9/08
CPCB08B9/0813B08B9/083
Inventor 靳峰陈纪良
Owner JINAN RUIDONG IND