SU1463746A1 - Method of clarifying beer mash in light beer production - Google Patents

Abstract

The invention relates to the food industry, its brewing industry, namely to methods for clarifying beer wort in the production of light beers. The purpose of the invention is to improve the quality of the finished product. The beer wort to be clarified with a centrifugal pump is delivered through the injector to the floatation tank. In the injector, air is supplied to the wort flow, which, when mixed with the wort, provides foaming of the latter. The foamed wort is dispensed in the flotation tank until it forms a suspension in the form of a compact foam and separates it from the wort. The clarified wort is sent for further processing. For a more complete separation of impurities and cold dregs, the ratio of the flow rates of air and wort is kept constant in the range from 0.2 to 0.5. At a constant ratio of air and wort flow rates within the specified limits, a uniform distribution of the floating air in the wort occurs during the whole filling of the wort holding vessel, and this contributes to the improvement; quality of the finished product due to more complete clarification of the wort. 1 tab., 2 Il. & and with i4 and a “4

Description

one

The invention relates to the food industry, to its brewing industry, and in particular to methods for clarifying beer wort in the production of light beers.

The purpose of the invention is to improve the quality of the finished product.

Fig. 1 schematically shows a device for clarifying a beer wort according to the proposed method; in Fig. 2. - an injector on the pipeline for supplying the wort to the flotation tank and a throttling valve on the pipeline for supplying air to the mixing chamber of the injector.

A device for carrying out a method for clarifying beer wort in the production of light sorts of beer contains a centrifugal pump 1 and an injection 31

Torus 2, mounted on the pipe 3 for supplying the beer wort to the 4shielding container A. The pipe 5 for air supply is connected to the injector 2. A pressure reducer 6 and a receiver 7, as well as an air flow meter 8 and a throttling valve 9 are installed on line 5. Injector 2 consists of body 10 and replaceable nozzle P. Case 10 of topa 2 injector is designed so that it blends chamber 12 , peaks 13 and diffuser 14.

PRI me R 1. Clarification wort light beer Zhigulevskoe When the ratio of air and wort 0,2 MVM

The beer wort is fed by centrifugal pump 1 through line 3 to injector 2. From the main air line through the line. 5 through the pressure reducer 6, the receiver €; p 7, the valve separator valve 9 air: the wasp feeds into the mixing chamber of the injector 2 where it is mixed with the beer wort. The foamed wort is fed through line 3 to the flotation tank 4, where it is aged to form a suspension in the form of a compact foam and separate it from the wort. The clarified mixture is sent for further processing. The required ratio of air flow Qg and beer wort Qj, is set at the beginning of the filling cycle of the tank 4 with the beer wort as follows.

Preliminary testing of the wort transfer system under the conditions of the planned air / wort flow ratio determines the wort flow rate 0, the wort pressure before the injection. rum 2 P,, wort pressure after injector 2 P.

For a given volume ratio of air and wort U, according to known pressures m wort before the injector R., and after injector Pj, when the pump is in empty capacity mode () and full capacity (m) of

About in Vd 0.85

IIS-PO p-p

i 7 0

(ABOUT

determine the required pressure values P in the mixing chamber 12 of the injector 2 for both modes

10 Pa.

5 o

P „, 1.42 -10 Pa.

01

During the filling cycle of the flotation tank 4, the flow rate of the wort Q decreases as the hydrostatic pressure of the wort bed increases.

The pressures R., and P / C, respectively, of the wort before the nozzle 1I of the injector 2 and after its diffuser 14 are made up of the hydrostatic pressure of the wort bed in the tank and the velocity pressure, depending on the wort flow rate Q. increase in hydrostatic pressure. Since the pressure of the wort before the injector 2, unlike the pressure fi after the diffuser 14 of the injector 2, is also affected by the resistance of the injector, compensating for the effect of the change in the flow of the wort (} at the pressure of the injector, before the nozzle of the injector , as a result, those with an increase in the level of wort in

0

tank 4 pressure P after diffu5

The injector's bore increases more than the pressure P. y in front of its nozzle and, according to the above equation (1), the ratio of air and wort flow rates decreases.

From formula (1), it follows that in order to maintain a constant volume ratio of air flow and wort flow, the pressure PO in the injector mixing chamber 12 must change accordingly. This can be achieved using the change in air flow-O. The air flow rate at the throttling valve 9 varies in accordance with formula

   -eat "

0

APf

H 0m; and

, 0,2 ,,

 K-0

; b

(2)

51

- pressure drop across a throttling valve located between the receiver and the injector;

resistance coefficient; the proportion of wort; acceleration of the power of the tin; linear air velocity; coefficient of proportionality.

Since, in the receiver with the help of pe6, a constant is provided, the equation takes

- PC Q. Q

where Рр - pressure in the receiver, whence

PO Rr - K Q

PP - K-Uo-Q

 Рр - K, -Ql.

Consequently, the fulfillment of the condition of the constant UQ with a decrease in the flow rate of the wort Qc and the required increase in air pressure; in the injector RO can be carried out automatically. For this, the required increase in Pd by the end of the cycle of filling the tank 4 is determined from equation (1), and ensuring this increase is achieved by selecting the parameters Pp and K (the position of the throttling valve) according to the dependence.

bridge (4).

From relation (4), on the basis of the found pressures P, and PQI in the mixing chamber and from the known productivity of the wort pump in the empty and full capacity modes QJ-, 0. determine the required pressure in the receiver Pp.

POI 1.40 "10 Pa; R 1, P, 0.0037 m Vc; Qc i 0.0034

Pflli. 0 ± 0034

Pf-1,40-10

0,0037

1 0.844;

PP 1.54 -10 Pa.

With the help of the gearbox 6, the found constant pressure P p 1.5410 Pa is set in the receiver 7.

With the help of a throttling valve 9 on the meter 8 air flow

463746

set the air flow to be used for a given flow rate QC) in the empty tank mode

5 Q5, Uo-Qc, 0.2-0.0037 0.00074.

ten

15

20

As the tank is filled with the suspension mixture; the pressure in the pipe 3 after the injector Pz rises, the wort flow Q decreases, the pressure in the mixing chamber PC rises, the pressure in the receiver P p remains unchanged and the air flow Qg decreases in proportion to the flow Q jt Ratio Uo costs are unchanged.

By the end of the capacity filling cycle, the data is as follows:

H 3 m;

0 0.0033 m3 / s;

)

and

-

35

40

45

50

55

Qg 0.00065 MVc;

Uc 0.2 m / m, the thickness of the foam layer 25 in the tank above the wort is 0.5 m. After 2 hours of settling, the thickness of the foam layer is 0.35 m, the relative clarification of the beer wort is 54%, the loss of the wort with foam is 0.34% , 30 Points assessment of the finished beer made from the wort according to the proposed method of clarification is equal to 22.15.

When the control batch of light beer wort is lightened, the Zhigulevskoe mode without automatic stabilization of the ratio of the volume flow rates of air and wort is characterized by the following parameters:

At HH Qt, 0.0037, Qj, 0.00074, Uo 0.2.

When H 3m Q 0.0034 m / s,

Qg ,, 0.0043 m Vc, Ue 0.125.

The thickness of the foam layer is 0.38 m.

After 2 hours of settling, the thickness of the foam layer is 0.25 m, the relative clarification of the wort is 39%, the loss of the wort with foam is 0.28%. Ballova assessment of the finished beer 21.40.

Note 2. Clarification of the wort - Zhigulevskoe beer light-logs with an air-wort ratio of 0.5.

Description of technology in example 1.

Defining Settings:

For N 0m and 0.5 m3 / m% P,. I, 88-10 Pa, Pa 1, 70-10 Pa,

0.85

D

eleven.

88jl5 - Po 70 -To PO

P5.1 1, 6PO Pa, Dl N 3 m and ,, 0.5 pt. U88-10 na; Wg 1.75 10 Pa;

0.5 0.85 Rho

75 -To - Rs

ROO 1.7-10 Pa.

The known performance of the pump at U 0.5 in the modes of empty capacity and full capacity Qcf 0.0030 MVc, Qcj 0.0028 determines the pressure in the receiver Pp

m / s

ii ii2 1.6-10

0,0028 0,003

0.933;

Pa.

PP 3, -10 I set the pressure found in the receiver. G using throttling valve 9 on the meter air flow set the air flow Q,

QB UO-QC. 0.5-0.003 0.0035.

The mode of operation at the end of the cycle is zapo,. lack of capacity; And 2.5 m ;, Qca 0.0028;

0.0013;

-VM

vg

m

layer thickness

Uo 0.46 foam 1.0m.

After 2 hours of settling, the thickness of the foam layer is 0.65 m, the relative clarification of the beer wort is 69%, the loss of the wort with foam is 0.66%.

The assessment of the finished beer made from the wort according to the proposed clarification method is 22.35.

The lightening of the control batch of the Zhigulevskoe beer beer without automatic stabilization of the ratio of the volume flow rates of air and wort is characterized by the mode:

When H O Q, 0.0030, Q 3, 0.00148, 0.49.

With Н 2,5 Qei 0,0028 m / s, Оb, 0,0009, and „0.32, toltdin foam layer 0.72 m.

After 2 hours of settling, the foam layer thickness is 0.48 m, the relative clarification of the beer wort is 0.49% wort loss with the foam, 0.60%.

0

five

0

25

thirty

35

40

45

Ballova assessment of the finished beer 22,05.

During the tasting, the best foam resistance of the beer made was noted. from the wort, clarified at a constant ratio of air and wort.

PRI and e R 3. The clarification of the wort light beer Saku light when the ratio of air and wort 0.2 mV

Description of technology in example 1. Determination of the settings in example 1.

Process parameters by the end of the cycle of filling the tank with H 3 M;: Qci 0.0031 QB2 0.006 UQ 0.19, thickness of the foam layer in the tank above the wort 0.38 m. After 2 hours of settling foam thickness 0.25 m, relative clarification of the beer wort 55%, wort loss with foam 0.25%. Ballova assessment of the finished beer 22,65.

When the control batch of light beer wort is brightened, the Saku light batch without automatic stabilization of the ratio of the volume flow rates of air and wort is characterized by the following parameters:

At m, Qci 0.0035 MVc; Qg 0.00075 MVc; U 0.21.

When H 3.0 m, Qc-2 0.0035 m / s; QB 0.004 Uo 0.115.

The thickness of the foam layer above the wort is 0.25 m. After 2 hours of settling, the thickness of the foam layer is 0.25 m, the relative clarification of the wort is 35%, and the loss of the wort with foam is 0.2%. Ballova assessment of the finished beer 22,45.

PRI me R 4. Clarification wort light beer Saku light when the ratio of air and wort to 0.5. Description of technology in example 1. Determination of the settings in example 2.

Process indicators by the end of the filling cycle of the tank H 2.4 m

I.

0

five

Q 0.0030 MVc, Qg.3 0.0015, U, 0.5. Thickness of a layer of foam is 0,8 m.

After 2.5 hours of settling, the thickness of the foam layer is 0.7 m, the relative clarification of the wort is 70%, the loss of the wort with foam is 1.05%. Ballova assessment of the finished beer 22.80.

When lightening the control batch of light beer Saku. Light without automatic stabilization of the ratio of the volume flow rates of air and wort process indicators are as follows:

At 0, 0.0030 Q6 0.0015 m / s; U 0.5.

When H 2.5 m Qc2 0.0030 m / s; Pvg 0,009 and 0,3 mVm

The thickness of the foam layer is 0.65 m. After 2.5 hours of settling, the thickness of the foam layer is 0.6 m, the relative clarification of the wort is 60%, and the loss of the wort with foam is 0.9%. Ballova assessment of the finished beer 22,63.

During the tasting, the lugha resistance of the finished beer produced using the automatic stabilization of the ratio of air and wort during flotation clarification of the village is noted.

When the process of clarification of the beer wort is carried out at given ratios of air and wort flow rates in the range from 0.2 to 0.5, the quality of the finished beer is improved in both sorts of Zhigulevskoye and Saku light beer. An increase in the ratio of air and wort flow rates above 0.5 leads to a noticeable increase in wort losses along with flotation foam. Reducing the ratio of air flow and wort below 0.2 does not allow for intensive flotation clarification of the wort and leads to a decrease in the clarification level of the wort.

As follows from the examples illustrating the method of clarifying the wort during the production of light beers, according to the proposed method, the ratio of the costs of air and wort is set and maintained constant throughout the entire filling cycle of the tank. At a constant ratio of air and wort flow rates in the range from 0.2 to 0.5, a uniform distribution of the floating air in the wort occurs during the entire cycle of filling the tank, and this

46374610

contributes to a more complete separation of impurities and cold dregs, improving the taste, the resistance of the finished beer and the stability of the foam.

As can be seen from the examples, the proposed method of clarifying beer wort in the production of light beers allows improving the quality of the finished IQ product, which is confirmed by the data given in the table.

Claims (1)

Invention Formula The method of clarifying beer wort in the production of light sorts of beer, involving the introduction of air into the stream of wort, holding the latter in the flotation tank until the suspension forms in the form of a compact foam and separating it, in order to improve the quality of the finished product When air is introduced into the wort stream, the ratio between the air flow rate and the wort flow rate is kept constant in the range from 0.2 to 0.5. with and g 1 Yu   fjL