CZ305328B6 - Filter installation for secondary filtration of beer and filter for such filter installation - Google Patents

Abstract

The filter installation for secondary filtration of beer, employing a diatomaceous earth-based filtration mass, according to the present invention, comprises at least a cylindrical filter (1) terminated below by a conical bottom (11) and above by a circular plate (12) and a domed cover (2), wherein openings for anchorage of vertically situated filtering elements (3) are performed in the circular plate (12). The filter installation further comprises a feeder (61) container intended for proportioning filtering suspension, closed above by an upper lid with en opening for filling the feeder (61) with a suspension, and provided with a protecting grate, wherein the feeder (61) container (61) is provided with a proportioning pump (6) and an agitator (62). The filter installation further comprises a main pump (8) with an inductive flow meter (81) situated in a main pipe (9) provided with an inlet eye sight (91) at the inlet of the filter (1) body, an outlet eye sight (92) at the filter (1) outlet, and a control unit (7) with control programs for controlling functions of structural elements and selection of filtration modes or packing of a base filtering layer. The invention also describes a filter for the above-indicated filter installation.

Description

Technical field

BACKGROUND OF THE INVENTION The present invention relates to a filtration device for secondary filtration of beer using diatomaceous earth filter media and a filter with a vertical location of filter candles as a support element for the filter media.

BACKGROUND OF THE INVENTION

In order to increase the biological durability of beer, the beer gets rid of not only yeast but also various other microorganisms. Different types of filtration or flow pasteurization of beer are used for this purpose. Many known filter devices use filter elements with diatomaceous earth filter. The problem is the construction of the entire device and filter element, which should allow the longest possible operating time without the need for cleaning, provided the best possible removal of microorganisms. Known filter layers clog quickly and lose efficiency. At present, filter layers of a new type and composition are being developed which require different operating parameters, such as flow rate, operating pressure, etc., than those which are available with existing filtering equipment, both in their formation - in leaching and in actual filtration. Therefore, it is not possible to use the known design solutions of filtering devices and filters that have been used for classical filtration, for example on a three-layer alluvial filtering mass.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a filter design which meets both the requirements for the development of improved newly developed filter media and the requirements for changed operating parameters.

SUMMARY OF THE INVENTION

This object is solved by the invention, which is a device for secondary filtration of beer using diatomaceous earth filter mass, which consists in that it consists of at least a cylindrical filter body at the bottom ending with a conical bottom and top with a circular surface and arched lid. openings for anchoring the vertically situated filter elements, further comprising a dispenser container for dispensing a filter suspension at the top closed by an upper lid with an opening for filling the dispenser with a protective grid. The dosing tank is completed with a dosing pump and a stirrer drive. It is further comprised of a main pump with an induction flow meter located in the main pipe provided with an inlet sight glass at the inlet of the filter body and an outlet sight glass at the outlet of the filter body. It is also made up of a control unit with control programs for controlling the functions of the structural elements and selecting the filtering or priming modes of the base filter layer.

The invention also relates to the flow rate of the main pump and the dimensions of the main pipe, which are selected as a function of the filtration area as follows:

basic filter surface of the filter in m ² diameter dimension main pipe in mm head flow rate. pump at back pressure 600 kPa in hl / h 1 to 3 25 10 to 25 3 to 6 40 30 to 75 6 to 10 65 60 to 150 10 to 20 80 100 to 250 20 to 30 100 ALIGN! 200 to 500 30 to 40 125 300 6,750

An advantage and a higher effect of the device according to the invention is the possibility of using alluvial filter masses with new parameters and with an extended filtration time. The device allows higher flow rates and higher operating pressures than known solutions.

A separate filter solution for the secondary filtration of beer using vertically positioned filter elements is a part of the invention. It consists of a cylindrical vessel, which is terminated at the bottom by a conical bottom and at the top by a circular plate with a peripheral flange. To it is anchored counter flange upper arched lid. Holes are provided in the annular plate for anchoring the vertical filter elements by means of a flat holder with a pair of overhangs of the top surface of the filter element head, in an anchoring position rotated on a pair of clips on the annular plate. The filter elements have a self-supporting structure formed by longitudinal beams on which a spiral of trapezoidal wire is wound, the shorter base of which is oriented towards the axis of the filter element. The spiral spacing of the coils forms a filter slot which extends in the direction of the filtrate flow by increasing the coil pitch.

The filter can be anchored to the support frame with support feet and bolts.

The cylindrical container filters are equipped with product and auxiliary media inlets and guarding sight glasses.

The advantage of the invention is the possibility of use for alluvial filter layers with parameters which allow removal of such microorganisms, which reduce the shelf life of beer, which penetrate the filter during standard alluvial filtration, or allow quality results only for a shorter time in standard filtration. The design allows a high flow rate so that the filter layer can be compacted enough to filter out microorganisms that pass through the filter in other similar solutions.

Clarification of drawings

The secondary beer filtration apparatus is described in more detail by way of example with reference to the accompanying drawings, in which Fig. 1 is a schematic representation of the whole apparatus.

Also, a separate filter invention for a secondary beer filtration device is described by way of example with reference to the accompanying drawings, in which Figures 2 and 3 show the filter in two views, Figure 4 is a detailed top view of the filter element inserted and Figure 5 is the same view in anchored position. FIG. 6 shows a detail of the filter element, respectively. filter slots.

-2GB 305328 B6

DETAILED DESCRIPTION OF THE INVENTION

In an exemplary embodiment of a device for secondary beer filtration using diatomaceous earth filter mass, this is composed of at least a cylindrical filter 1 terminated at the bottom by a conical bottom 11 and at the top by a circular plate 12 and a vaulted lid 2. 3. Further parts of the device are a dispenser container 61 for dispensing a filter suspension at the top closed by an upper lid with an opening for filling the dispenser 6f with suspensions. The opening is provided with a protective grille. The dispenser container 61 is supplemented by a metering pump 6 with a stirrer drive 62. The apparatus further comprises a main pump 8 with an induction flow meter 81 disposed in the main conduit 9. This is provided with an inlet sight glass 91 at the inlet of the filter housing 1 and an outlet sight glass 92 at the outlet of the filter. 1. Another part of the device is a control unit 7 with control programs for controlling the functions of the components and selecting the filtering modes or the deposition of the basic filter layer.

The following are combinations of the flow rate of the main pump 8 and the dimensions of the main pipe 9 depending on the filter surface, which are different for different filter surface sizes, i.e. for different embodiments, where the remaining structural elements are identical.

basic filtering surface of filter I in m ² diameter dimension main pipe 9 in mm head power flow. pump 5 at backpressures 600 kPa in hl / h 1 to 3 25 10 to 25 3 to 6 40 30 to 75 6 to 10 65 60 to 150 10 to 20 80 100 to 250 20 to 30 100 ALIGN! 200 to 500 30 to 40 125 300 6,750

The described apparatus utilizes a filter, which is described as the following example of an independent independent invention:

A complete secondary beer filtration device as described above consists of the body and the filter of its component, a metering pump 6 with a container 61 and a stirrer. An essential part of the device is an inlet main pump 8 with a flowmeter 81 and a safety valve 10. A common part is a control unit 7 with a control panel 71. The device has the usual inlets for water, air and beer for filtration and the usual sludge and filtrate outlets . A filter 1 is essential for the technical solution, the body of which is formed by a cylindrical container 13, which is terminated in the lower part by a conical bottom 11 and in the upper part by a circular plate 12 with a peripheral flange Η. An annular flange 21 of the upper arched lid 2 is anchored to the peripheral flange 14. In the annular plate 12 openings are provided for anchoring the vertical filter elements 3 by means of a flat holder with a pair of overhangs 35 of the top surface of the head 33 of the filter element 3. The filter element 3 has a self-supporting structure formed by longitudinal beams, on which a spiral 31 of trapezoidal wire is wound, the shorter base of which is oriented. toward the axis of the filter element 3. The spiral thread spacing forms a filter slot 32 which widens in the direction of the filtrate flow due to the increasing pitch of the spiral.

-3 CZ 305328 B6

The filter housing 1 is anchored to the support frame by 4 support feet with screws. Its cylindrical vessel 13 is provided with throats for supply of product and auxiliary media and for control of operation by guard sight glasses 16.

The function of the device results from its construction:

Before starting filtration, it is necessary to create filter layers 3 on the filter elements, so-called filter cake, which are not loaded with sludge. The filter mass is formed on the vertical filter elements 3, the so-called candles. First, a filter suspension consisting of drinking water and coarse filter diatomaceous earth is deposited on the candles at a flow rate of 10 to 25 hl / h / m ^{1 2} . The diatomaceous earth is deposited in an amount of 0.66 to 1.05 kg / m ^{2 of} filter surface such that the thickness of the first filter layer is greater than 2 mm. Upon reaching the required thickness at the same flow rate, a second filter layer is deposited, which is a mixture of fine filter diatomaceous earth in an amount of 0.55 to 1.20 kg / m ² filter surface and adsorbent material, preferably cellulose, in an amount of 0.10 to 0.20 kg / m ^{2 of} filtration area, final wet thickness also greater than 2 mm. Thereafter, the third filter layer is deposited at an unchanged flow rate, a slurry containing a mixture of coarse and fine filter diatomaceous earth at a ratio of 10:90 to 30:70 in an amount of 0.30 to 0.50 kg / m ^{2 of} filter surface and adsorbent material of 0.03 up to 0.06 kg / m ^{2 of} filter surface. The final thickness is greater than 1.5 mm. Subsequently, the first to third filter layers are compacted at an increased flow rate of 25 to 45 hl / h / m ² for 3 to 6 minutes, after which a non-compacted fourth filter layer is formed and grown from filter material of the same composition as the third layer added to the filtered beer. in an amount of 0.015 to 0.03 kg per 1 hl of beer at a flow rate of 10 to 25 hl / h / m ² , usually 20 to 25 hl / h / m ² .

The filtration capability is maintained by the addition of kieselguhr with adsorptive cellulose and self-filtration while continuously adding kieselguhr and adsorbent material and increasing the thickness of the fourth unstretched filter layer until the pressure in the sludge space reaches a permissible maximum of 0.6 MPa. Thereafter, the sludge cake is removed from the surface of the filter elements 3. Since the filter slot 32 widens in the direction of the filtrate flow, kieselguhr particles are not wedged. When backwashing against the direction of filtration, the slot 32 appears as a nozzle and promotes removal of the sludge cake. The filtration is finished by pushing the filtered beer with water in the direction of filtration and subsequent blasting of sludges with compressed air with water. The filter is then cleaned and sterilized.

Industrial applicability

The invention of the secondary beer filtration device and the filter for this device can be industrially produced for use as an end device in the beer production process.

Claims (6)

PATENT CLAIMS Apparatus for secondary filtration of beer using diatomaceous earth filtering mass, characterized in that it comprises at least a cylindrical filter (1) at the bottom terminated by a conical bottom (11) and at the top by a round plate (12) and an arched lid (2), openings for anchoring the vertically situated filter elements (3) are formed in the annular plate (12), from a dispenser container (61) for dispensing a top filter cartridge closed with an upper lid with a dispenser filling hole (61) provided with a protective grid, 61) is supplemented by a metering pump (6) and a stirrer (62), from a main pump (8) with an induction flowmeter (81) located in the main pipe (9) provided with an inlet sight glass (91) at the inlet of the filter housing (1) and outlet a sight glass (92) at the output of the filter (1) and of the control unit (7) with controllers -430 305328 B6 programs to control the features of the components and select the filtering or priming modes of the base filter layer. The secondary beer filtration device according to claim 1, characterized in that the flow rate of the main pump (8) and the dimensions of the main pipe (9) are selected as a function of the filtration area as follows: basic filtering surface of filter (1) in m ² diameter dimension main pipe (9) in mm head power flow. pump (8) at back pressure 600 kPa in hl / h 1 to 3 25 10 to 25 3 to 6 40 30 to 75 6 to 10 65 60 to 150 10 to 20 80 100 to 250 20 to 30 100 ALIGN! 200 to 500 30 to 40 125 300 6,750 Filter for a secondary beer filtration device with vertically positioned filter elements, characterized in that it consists of a cylindrical vessel (13), which is terminated in the lower part by a conical bottom (11) and in the upper part by a circular plate (12) with peripheral a flange (14) to which the counter-flange (21) of the upper arched lid (2) is anchored, wherein holes in the circular plate (12) are provided for anchoring the vertical filter elements (3) by means of a flat holder with two overhangs (35) (33) of a filter element (3) in an anchoring position rotated on a pair of clips (15) on a circular plate (12), the filter elements (3) having a self-supporting structure formed by longitudinal beams on which a spiral (31) of trapezoidal wire is wound the shorter base of which is oriented towards the axis of the filter element (3), wherein the spiral thread spacing forms a filter slot (32) which it increases the flow rate of the filtrate by increasing the pitch of the spiral. Filter according to claim 3, characterized in that it is anchored to the supporting frame (4) by supporting feet and bolts. Filter according to claim 3, characterized in that the cylindrical container (13) of the filter (1) is provided with necks for supplying the product and auxiliary media. Filter according to claim 3, characterized in that the cylindrical container (13) of the filter (1) is provided with guard sight glasses (16).