RU2403276C2 - Installation for mashing crushed malt - Google Patents

Abstract

FIELD: chemistry.

SUBSTANCE: invention relates to food industry. The installation contains pipes joined in series with reinforcement, mashing apparatus, a circulation pump, a shell-and-tube heat exchanger and a delivery pipe with a nozzle. The installation enables circulation of a two-phase water-mash suspension in a loop and heating in the shell-and-tube heat exchanger. The nozzle lies at an angle to the horizontal and the vertical axis of the apparatus for directing the out-flowing jet of suspension at a tangent to the wall of the apparatus. The delivery pipe is made such that the horizontal angle of the nozzle can be changed by turning in a socket joint.

EFFECT: high quality of beer wort.

3 dwg

Description

The invention relates to the food industry, in particular to the brewing process - mashing of malt. A known apparatus for mashing - mash apparatus [1] (Figure 1).

Mash apparatus [1] consists of: housing 1, mixer 2, steam jacket 3, gear 4, electric motor 5.

The principle of operation is as follows: water with a temperature of 51 ° C is poured into the mash apparatus [1], and malt grinding is supplied simultaneously with water. Creating a uniform mixture (mash) occurs using a mixer 2, the rotation of which is created using an electric motor 5 through a reducer 4. Next, the mash is kept at different temperature conditions, for which a steam jacket 3 is used, consisting of segment pipes, to which heating steam is directly supplied 2-3 bar pressure.

The disadvantages of the apparatus [1] are: the presence of shirts from segmented pipes for heating the apparatus, which complicates its design and increases metal consumption; in a relatively low intensity of heat transfer between the mash and the wall, as well as in the presence of an agitator requiring a special drive and a unit for sealing the agitator shaft, which also complicates the design.

The closest technical solution to the claimed object of the invention, adopted as a prototype, is an apparatus for mashing and filtering beer wort [2].

The essence is illustrated by the description with reference to the layout diagram of the apparatus [2] (Figure 2).

The apparatus is as follows: apparatus 1, filter baffle 2, drain pipe 3, nozzle 4, valve for draining grains 5, valve for draining residual wort 6, pump 7, valve for regulating the flow of wort 8, rotameter 9, shell-and-tube heat exchanger 10, nozzle 11 .

The principle of operation of the apparatus is as follows: pre-heated to 40 ° C water is poured into the mash-filtration apparatus 1 in an amount sufficient to fill the circulation circuit in order to initiate continuous circulation. Immediately after the start of circulation, the process of mixing malt grinding with water preheated to 40 ° C in a mash-filtration apparatus begins. Creating a uniform mixture (mash) is carried out using the pump 7 and nozzle 11. The circulation speed is selected so that the circulating stream, which returned through the nozzle 11, would provide constant mixing of the mash in the area of the filtering partition 2 and, as a result, unimpeded passage of the wort through lattice, which would lead to improved hydrodynamic characteristics of the apparatus. The mixing intensity is measured using an adjustable valve 8. The fluid flow rate is measured using a rotameter 9. During circulation, the wort passed through a shell-and-tube heat exchanger with steam heating 10, the heating steam for which is supplied under a pressure of 0.5-1 bar, which is regulated by a pressure sensor RE. This is necessary to ensure the selected mashing temperature regime, which represents stepwise heating withstanding temperature pauses, which are monitored using a TI temperature sensor at the inlet and outlet of the shell-and-tube heat exchanger and inside the apparatus. Optimal pauses for enzyme activity: 45-52 ° C - protein pause, or pause for splitting β-glucan, 62-65 ° C - maltose pause, 70-75 ° C - pause for saccharification, 78 ° C - mashing completion temperature.

After the mashing process is completed, valve 6 opens and the first wort is released through the nozzle 4. After the first wort is released, if washing water is required, valve 6 is closed, water is poured into the upper part of the apparatus and the washing cycle continues at a temperature of 76 ° С. After this, drainage through the valve 6 of the wash water begins. Then valve 5 opens and the grains are unloaded, which consists of crumb shells, germ shells and other substances not dissolved during mashing.

The apparatus [2] eliminated the disadvantages of the apparatus [1], however, the long-term operation of the apparatus [2] showed that the filtering partition, despite intensive jet mixing, is gradually clogged with grains and the passage of the wort from the upper part of the apparatus to the bottom stops. Further operation of the apparatus [2] is possible only after washing the partitions, and this requires additional time and reduces the overall production efficiency.

The disadvantages of the apparatus [2] were taken into account in the present invention, the essence of which is the rejection of the filtering baffle and the pump circulation of the suspension through an external shell-and-tube heat exchanger, and mixing in the apparatus is carried out by a stream of suspension directed tangentially to the wall of the apparatus.

The aim of the present invention is to provide such a design of a mashing milling apparatus, which would provide a higher quality product and reduce energy consumption for heating the suspension due to the higher heat transfer coefficient in the heat exchanger.

The invention is illustrated by the description with reference to the layout scheme (Figure 3).

The installation consists of apparatus 1, valve 2, pipe 3, pump 4, valve for regulating the flow rate of suspension 5, shell-and-tube heat exchanger 6, coupling 7, nozzle 8.

The principle of operation of the installation is as follows: water is poured into the mash apparatus 1, with the help of pump 4 it passes through a shell-and-tube heat exchanger 6 and is heated to 52 ° C, then malt grinding is added to the apparatus 1 in the amount specified in the technological procedure. To create a uniform distribution of grinding in the volume of the apparatus, the nozzle 8 is directed at an angle α to its vertical axis and at an angle β to the horizontal. The angle β, if necessary, can be changed by turning the nozzle 8 of the coupling 7.

In the present invention, the pump 4 serves not only as a transporting body, but also as a device that is able to deeply extract the necessary substances from the grains into the wort during the extraction process. This is due to the high speed of energy dissipation by the impeller into the volume of the suspension.

After the mashing process is completed, the suspension is pumped to the filter 4 by closing the valve 5 and opening the valve 2 and discharging the suspension through the pipe 3.

The present invention was tested in laboratory conditions and has shown its efficiency.

Literature

1. Wolfgang Kunze. Technology of malt and beer. 2003 year

2. Schuster (Weinfurtner) L. Narcissus. Wort preparation technology. Volume 2, 1992

Claims (1)

Mash installation for the preparation of wort containing consecutively connected pipelines with fittings, a mash unit, a circulation pump, a shell-and-tube heat exchanger and a supply pipe with a nozzle, characterized in that it is designed to circulate and heat a two-phase suspension of water-pellet in the shell-and-tube heat exchanger, nozzle is located at an angle to the horizontal and vertical axes of the apparatus to direct the jet of suspension flowing out from it tangentially to the wall of the apparatus, and the supply tube Execute to change a nozzle angle of horizontal rotation by a coupling joint.

Images