DE2720167A1 - Wine must sulphuration system - with evaporator for liquid sulphur di:oxide and precise metering valves - Google Patents

Abstract

Liquid sulphur dioxide is introduced in precisely metered amounts into must in the mfr. of wine by passing it at constant temp. and pressure in an evaporator. The contact area between the liquid and the heat exchanger wall of the evaporator is altered in direct proportion to the required amt. of gaseous sulphur dioxide. The system is partic. economical for smaller establishments. It requires neither skilled maintenance personnel nor complicated control equipment.

Description

Method and device for introducing precisely metered

th amounts of gaseous sulfur dioxide in musts or the like.

for making wine for making wine The invention relates to a process for introducing sulfur dioxide into musts in precisely dosed quantities or the like.

for making wine from a source of supply for Sulfur dioxide in a liquid state.

The invention also relates to a device for introducing Sulfur dioxide in precisely dosed amounts in musts or the like. for making wine.

It is well known that certain liquids, mixtures, Suspensions, pulps, etc. when processing with precisely metered amounts of gas offset.

For practical reasons, these gases generally come in liquefied form Condition in the trade and are in pressure vessels (e.g. steel bottles or the like). At the time of use, the liquid must therefore be exactly as required Amount converted into gas and introduced into the relevant system, in which the gas is to be used.

The dosage should preferably take place with each gas supply, if the liquid is already in a gaseous state, because then it will can be more easily mixed with the liquid to be treated, and especially because the problem of excessive cooling, which even leads to the formation of ice at the injection point can lead to being avoided if the product to be added is already in place is in a gaseous state into which liquid or pulp is mixed.

If the product is injected in a liquid state, it evaporates it almost instantly, when it is no longer pressurized, absorbs the heat of vaporization and cools its immediate surroundings so much that even ice forms, which Can cause damage through locking effects.

If the to be introduced into the liquid, pulp or similar during processing Gas quantity fluctuates over time, an apparatus should be available if possible carries out these fluctuations automatically, easily and safely.

The corresponding devices or equipment used so far

Devices are, for the most part, quite complex and for small ones Systems not suitable.

The present invention relates to a method and a device for gasifying liquids, in particular liquid sulfur dioxide, in particular in small plants that are relatively economical, as well as the introduction of precisely dosed quantities in musts for the production of wine. The procedure and the device according to the invention are based on the idea of the contact area between to automatically change the liquid gas to be gasified and a hot wall. There the heat transfer in this case takes place according to the formula Q = KS tO, where Q is the Required amount of heat, S is the contact area, K is a key figure that depends on the gas type and tO are the temperature difference in the evaporation apparatus, the different Variables can be changed at will, but so that the amount of heat Q at any time corresponds to that which is required for the production of the desired amount of gas is.

The only figure of the attached drawing shows very schematically an apparatus for implementing the system of the invention.

In the drawing, R is a steel bottle or other container, which contains the pressurized gas in the liquid state. R1 denotes the outlet valve for the liquid from the steel bottle R. The whole is located according to the invention in an environment with constant temperature, so that the pressure conditions also remain the same.

With E a heat evaporator or exchanger is referred to, with the steel bottle R is connected by a tube T.

It consists of one or more tubes S leading from one a coat or container A are enveloped, in which one, preferably with a hot water heating system, a warm heating fluid of the pressurized fluid to be gasified circles that reaches S.

Of course, the circuit in the device E could also be designed the other way round, i.e. the heating fluid could flow through the interior of the Tube or tubes S flow and the liquefied gas to be gasified through the exterior of the tubes. Furthermore, the heating fluid can be of any suitable type, e.g. warm water, steam, warm oil or similar or any other suitable Heating means.

On the tube (or on one of the tubes) of the evaporator E is there where the gas evaporates, a manometer M is attached, which shows the pressure of the Gas.

However, the pressure in S is automatically kept constant.

The evaporation of the liquid in S takes place only to the extent that that the pressure in S is the same as in the steel cylinder R. If the pressure in S increase with the valve Ri open, the gas would flow back to R and avoid contact with the hot wall of the evaporator. If, on the other hand, the Pressure in S, further liquid flows out of R, evaporates and the pressure in S returns to the specified value.

From S, the gas enters at the specified pressure mentioned above a heated pipe Q which has various outlets for the gas to the elements to bring through which the liquid to be processed, pulp or the like.

flows. In the drawing, these elements consist of tubes N1, N2, N3, which are all fed from Q via a valve W1, W2 or W3, into one Flow meters F1, F2 or F3 open and from there through another valve V1, V2 or V3 to pipes N1, N2 and N3.

According to the invention, this device is used as mentioned, in order to add sulfur dioxide in a wine cellar to winemaking musts under precise doses to direct.

In the drawing, B denotes the must container or tank. The must is extracted by a pump P2 and directed to pipes N1, N2 and N3, where it is sulphurized. The container B is provided with two indicators L and L ', which show the must level, and between the minimum and Peak. They open and close the supply of B with must automatically and regulate the pump P2.

The operation of the device is as follows: At the beginning of the cycle all valves V1, V2, V3 ... W1, W2, W3 ... are closed. The operator opens the valve R1 of the steel cylinder R, which contains the liquid, which is under pressure Contains sulfur dioxide. This also causes the pipe T and the evaporator E pressurized because the liquid coming to E is in contact with the Wall of the tube S, which is heated by the hot liquid circulating in A has been. As already said above, the pressure in S is automatically increased kept the specified value.

Now the valves W1, W2, W3 ... are opened, the gas flows into the corresponding flow meters F1, F2, F3 ...

and gets through the also opened valves V1, V2, V3 ... in the liquid, pulp or similar to be processed, precisely in the desired form Amount, with the gas pressure remaining the same.

The gas extraction can be visibly checked at each point of use are determined by the flow meters F1, F2, F3 ...

Since they are attached to the gas circles, they show the momentary Amount of gas to each gas supply. These flow meters can be used in a number of ways can be adjusted as required.

As already said, this system has proven to be particularly suitable for smaller systems, such as those for the S02 supply and dosing when processing must in the wine cellar.

Usually the pressed grapes have to be drained. The must is collected in basins, from which a piston pump (i.e. at constant power like the one according to P2 of the drawing) removes the must in order to add it to the various Promote fermentation vats. Pieces of pipe are made along the feed line of each vat inserted, such as N1, N2, N3 ..., in which sulfur dioxide flows through the must in proportion to the output of the pump, i.e. to the amount of must which flows through the aforementioned pipes, is injected.

For the purpose of further explanation, a numerical example follows below for a must processing. If the pump P2 pumps 300 dz of must per hour and man If you want to distribute the must S02 in an amount of 10 g per dz, you have to proceed as follows, that when the must level indicator L activates the pump P2, it is the same The moment valve V2 opens, which opens the inflow of S02, regulated in terms of quantity through valve W2 and visible on F2. This reading must have a supply of 300 dz x 10g = 3,000 g per hour (3 kg S02 per hour). On the flow meter the scale can be specified in kg / hour or in g S02 per dz of must in relation to the performance of the pump.

From the description above it can be seen how simply and precisely in the metering and automation, the method and the device according to the invention work. They can also be used for smaller systems, as in the previous one Example has been set out. The injection points of the gas can be increased as required or be lowered without special action being required, because - as stated at the beginning of this description - the pressure automatically drops in S, when the gas demand increases, so that from R to S a larger amount of gas in liquid State that is immediately evaporated by the heat present in A and to leads to an increase in the pressure that delivers the greater amount of vaporized liquid, which is to be injected into the liquid or pulp or similar to be processed.

It should be repeated at this point that the liquid in which the metered gas is introduced, a liquid or a gas, a mixture or a suspension (more or less dense) or a fruit pulp or any other substance or the like.

To ensure that the system works properly the pipe Q from the evaporator E, which carries the gas to the various points of use distributed, to be heated by already known, suitable means, so that pressure fluctuations of the gas, which could endanger the proper functioning of the system.

The heating of the evaporator R should preferably be with warm water take place with a corresponding system in the manner of a hot water heating in order in this way special surveillance personnel or complicated control equipment to avoid.

Claims (9)

Claims method for the introduction of sulfur dioxide in precisely dosed Amount in musts or the like. for making wine from a supply source for sulfur dioxide in the liquid state, characterized in that the liquid from a supply tank with constant temperature and constant pressure into one Evaporator is passed, whereby the contact surface between the liquid and the heat exchanger wall of the evaporator in direct proportion to the required amount of gaseous Sulfur dioxide is changed. 2. The method according to claim 1, characterized in that the heat exchanger walls of the evaporator run essentially vertically, and that the liquid sulfur dioxide reaches the evaporator from the supply tank according to the principle of communicating vessels, the change in the contact area between the liquid and the heat exchanger wall is achieved by changing the liquid level in the evaporator, and where this level is determined from the difference in the gas pressures above the liquid level prevail in the evaporator or in the supply tank. 3. Device for introducing sulfur dioxide in precisely dosed Amount in musts or the like. for making wine after one or both of the preceding claims, characterized by a supply tank with liquid Sulfur dioxide, which is kept at constant temperature and constant pressure will; an evaporator to convert the sulfur dioxide into the gaseous state, consisting of a chamber with heated walls, elongated in the vertical direction and directly connected to the supply tank, which is followed by liquid sulfur dioxide is supplied according to the principle of communicating vessels, up to a height which is determined from the difference in the gas pressures in the chamber of the evaporator and prevail in the supply tank above the liquid sulfur dioxide; at least a distribution line for controlling the sulfur dioxide exiting the evaporator inside the wine must, the line having a flow meter and a regulating valve for the gas outlet contains; at least one supply pipe for the wine must and a constant power pump to control the must in this pipeline, within which the latter is the distribution line of the gaseous sulfur dioxide concludes. 4. Apparatus according to claim 3, characterized in that the supply tank the sulfur dioxide and the chamber of the evaporator to each other through a pipe line which in turn are connected to the lower ends of the tank and the chamber is. 5. Apparatus according to claim 3 or 4, characterized in that several pipelines are provided for the supply of the must, with each a distribution and control line for sulfur dioxide corresponding flow meter and a corresponding regulating valve connected is. 6. Apparatus according to claim 5, characterized in that the distribution and control lines for the gaseous sulfur dioxide in parallel to a single one Evaporators are switched on. 7. Device according to one or more of claims 3 to 6, characterized characterized in that the chamber of the evaporator is surrounded by a jacket, in which warm water circulates. 8. Apparatus according to claim 7, characterized in that the circuit of the warm water is done with a hot water heating system. 9. Device according to one or more of claims 3 to 8, characterized characterized in that the pump takes the must from a tank with constant power, which is provided with a pair of indicators for the control of the maximum level, which can give an actuation signal to the pump or to control the Minimum level, whereby you can give the pump a switch-off signal.