SU1734654A1 - Process for producing fish meal - Google Patents

Abstract

Use: production of fodder fish meal and its preparation for bulk storage and pneumatic transport. The essence of the invention: in order to prevent caking and adhesion of fish meal during its manufacture, calcium carbonate (chalk) is added to the semi-finished product. Positive effect is an increase in labor productivity during transportation.

Description

The invention relates to the production and handling of feed fish meal in the fish industry.

With the known method of production, the main part of the cargo processing of fish meal is performed manually using bag bags.

However, the high fat content of the flour determines its adherence and caking, limiting the possibility of transporting pneumatic equipment or large containers. The oxidation of fat (or exposure to microorganisms) causes the flour to self-heat and the likelihood of its self-ignition, eliminating the possibility of storing flour in large masses.

Methods are known for collecting and transporting caking materials by using pneumatic mechanical disintegrating devices, pulsating air supply through a pipeline, etc.

But under the conditions of a large number of transshipments and long-term cargo transportation

mining vessel - consumer method of neutralizing the harmful qualities of cargo with the help of special devices is inefficient.

The purpose of the invention is to prevent caking and adhesion of fish meal during its bulk storage and pneumatic transport.

The goal is achieved by adding calcium carbonate (chalk) to it after drying the minced fish raw material as a means of absorbing fat and moisture. An additional effect can be reduced by contact with air, which reduces fat oxidation and allows an increase in shelf life with a stable quality of flour.

Fishmeal is known to be an ingredient in many animal feeds for agriculture, and these feedstuffs contain chalk (MASP-brand CaCO3). In case of using fish meal in its pure form, for example in fish farming,

 W

AND

Xsj

WITH

ft

cl

14

chalk, being a physiologically neutral substance, is at least harmless.

The elimination of the harmful properties of fishmeal - stickiness and caking, allows for the mechanization of the entire technological cycle of the production of fishmeal, including transport and storage operations using known devices.

The invention is as follows.

At the press-drying installation, boiling, pressing and drying of minced fish raw materials is carried out. By a fan or auger of the mill installation, the dried product is fed to the crusher. After grinding with the addition of chalk, the flour is piped into a horizontal tank equipped with aerolotki and augers for unloading. The tank is divided into compartments, in one of which a supply of chalk is stored for flight, from where the pipeline supplies chalk to the metering unit to add to the mill product. After emptying, the compartment may be filled with fish meal. The pneumatic installation of the suction and delivery action is located on board the vessel.

Flour transfer to the transport vessel is performed by pneumatic equipment of the production vessel using flexible hoses connected to the fixed pipelines on the cargo deck of the transport vessel. Dischargers are located at the end points of the pneumatic track to fill large containers. At the port, the containers are unloaded by the port's crane equipment and delivered to the wagons or to the warehouse, or directly from the dischargers, the flour is pumped to tank trucks for delivery to the consumer. Is possible

flour overloading by tankers equipped with appropriate pneumatic equipment.

The addition of chalk to the main product is carried out at the following stages of production (depending on the technical characteristics of the semifinished product and the equipment used): into the screw feed of the mill; to the mill through the nozzle feed nozzle; the same with the additional grinding fish

flours (mainly in coastal conditions). An adjustable continuous dispenser is used to add chalk.

The quality of fishmeal can be improved by cooling it (for example, cooling the tank in the extractive

vessel water jacket), by reducing the humidity during pneumatic conveying, purging the tank during storage, absorbing residual moisture with chalk,

The economic effect is achieved for

by reducing the labor intensity of handling and transporting and storing fishmeal at sea and in ports, reducing their duration, eliminating the need for baggage, and increasing

Claims (1)

the quality of fish meal and the safety of its storage (safety of spontaneous combustion). Claims Method for production of fodder fish meal by boiling, pressing and drying minced fish raw materials and grinding dried semi-finished product, characterized in that, in order to prevent caking and sticking of fish flour during bulk storage and pneumatic transport, after drying the minced fish raw material, Calcium carbonate (chalk) as an agent for absorbing fat and moisture.