SU1691219A1 - Shipboard cargo tank cleaning system - Google Patents

Abstract

This invention relates to shipbuilding. The aim of the invention is to improve the performance of the system. The system includes cargo 1 and slop 2 tanks connected by a scrubbing pipe 3, on which a scraper pump is installed, connected by a washing pipe 5, washing pump b, seawater preheater 7 and washing machines 8, device 10 connected to the washing pipe 5 by means of a distribution manifold 14 and a check valve 15 with a reversible hydraulic actuator 16. The system also contains a jet pump 17 connected to a hydraulic mixing device 10 and through a supply line 18 for supplying the washing solution — with tstoynym tank 1 February ZP f-ly, 1 ill.

Description

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This invention relates to shipbuilding, in particular to tank washing systems.

The purpose of the invention is to improve the performance of the system,

The drawing shows the ship tank cleaning system.

The system includes cargo (zamyvayemy) 1 and slop 2 tanks connected between each other by a stripping pipe 3, on which a stripping pump 4 is installed, connected by a washing pipe 5, a washing pump 6, a seawater preheater 7 and washing machines 8, cargo tank 1. Additionally, the system is equipped with a cleaning solution preparation device 10 containing a loading 11 and a mixing chamber 12, between which there is a calibration diaphragm 13 with a predetermined flow area depending on awn from the required concentration of the detergent preparation. The device 10 is connected to the washing pipeline 5 by means of a distribution manifold 14 and a controlled shut-off valve 15 with reversible hydraulic actuator 16. The system also includes a jet pump 17 connected by a suction nozzle with a chamber 12, a working water supply nozzle with a collector 14, and the discharge nozzle - with pipeline 18 supply of washing solution. To maintain a constant concentration of the chemical detergent in the aqueous solution of the washing liquid after the washing pump 6, a sensor (device) is installed to monitor the concentration of the chemical detergent 19 by the viscosity of its aqueous solution, which is hydraulically connected to the shut-off valve 15 with a reversible hydraulic actuator 16, which opens the water chemical detergent solution in the chamber 11 and 12 of the device 10 and the jet pump 17.

Pump 6 is in communication with the onboard Kingston 20 and with the slop tank 2, with which the pipeline 18 is also connected.

Ship tank cleaning system can operate in a closed and open loop.

When operating in a closed cycle, the outboard water from the onboard kings 20 is supplied by the washing pump 6 through the outboard water heater 7 through the check valve 15 with reversible hydraulic actuator 16 to the collector 14 connected to the loading chamber 11, to the chamber 12 and to the jet pump 17. water into the feed chamber 11, a chemical detergent in it, for example, type IUD-1 (based on poorly water-soluble polymers) changes its viscosity and through the calibration diaphragm 13 enters the chamber 12, where it dissolves due to kinetic This is the energy of the rotating flow of water resulting from the supply of water tangentially to the chamber and the suction of the aqueous solution by a jet pump 17 from the center of this chamber. Through jet pump 17 water solution of chemical detergent

0 of the preparation is supplied to a slop tank 2. After preparing the required amount of washing liquid, the system operates in a closed cycle. The washing pump b delivers the prepared washing liquid from an ot5 standing tank 2 through the outboard water heater 7 to the washing machines 8 brought into the cargo tank 1. From the cargo tank 1 the washing liquid with a scraper pump 4 is taken into the slop tank 2, where

0, the preliminary sludge of the washing liquid occurs, which then flows by gravity into the sedimentation tank 2 for the subsequent sludge. After this, the wash cycle is repeated.

5 In the process of washing off soils, the concentration of the chemical detergent in the aqueous solution of the washing liquid decreases as a result of its complex physicochemical interaction with the washed soils and the surface of the cargo tank being washed up. ,

Jet pump 17 delivers the solution to the settling tank 2, or to the suction nozzle of the washing pump 6.

5 When operating the system in an open cycle, the outboard water from the onboard kings 20 is supplied by the washing pump b through the outboard water heater 7, through the stop valve 15c by reversing hydraulic supply 16 to the collector 14 connected to the loading chamber 11, to the chamber 12 of the hydraulic mixing device 10 and to jet pump 17 associated with its suction port with a chamber

5 12 devices 10. When water is fed into the loading chamber 11, the chemical detergent preparation contained in it, for example, type IUD-1 (based on water-insoluble polymers) changes its viscosity and

0 through a calibration diaphragm 13 with a predetermined flow area depending on the required concentration of the chemical detergent in the aqueous solution of the washing liquid enters the chamber 12, where it dissolves due to the kinetic energy of the rotating flow of water resulting from the supply of water tangentially to the chamber and suction water solution jet pump 17 from the center of this chamber. Through a jet pump 17, an aqueous solution of a chemical detergent preparation is supplied to the required value due to the mixing of an aqueous solution of a chemical detergent preparation with intake water.

The washing pump 6 delivers the washing water prepared in this way through the outboard water heater 7, through a device controlling the concentration of the chemical detergent 19 by the viscosity of its aqueous solution, which is hydraulically connected to the shut-off valve 15 with the reversible hydraulic drive 16 to the washing machines . Ki 8, wound up in a cargo tank 1.

When the concentration of the chemical detergent in the aqueous solution 15 of the washing liquid drops, the shut-off valve 15 with reversible hydraulic actuator 16 opens the access of the washing liquid to the chambers of the device 10. From the cargo tank 1, the waste washing liquid is taken by the cleaning 20 pump 4 to the slop tank 2 of the first stage of sediment, where the preliminary sludge of the washing liquid, which then flows by gravity into the sludge tank 2 of the second stage of the sludge for the next 25 sludge of the spent washing liquid and delivery to the onshore clearing facilities or for discharge over the permissible eco-Logically harmless concentration of a chemical detergent,

Claims (2)

1. A cargo tank cleaning system for ships, containing settling tanks between each other, one of which is connected through a pump to a cargo tank through a stripping machine and a washing pump connected to a water intake device and a preheater through washing machines, which is performance characteristics, it is provided with a solution solution device communicating with each other with a mixing chamber, a distribution manifold, and a controlled shut-off valve, the inlet of which is connected to the heating output evatel, and a jet pump in communication with the mixing chamber, another of the above mentioned settling tank, distribution manifold and inlet of the washing pump. 2. A system according to claim 1, characterized in that it is provided with a sensor for monitoring the concentration of the washing solution installed at the exit of said preheater.