JPH03213108A - Device and method for recovering brewery filter medium containing diatom earth - Google Patents

Abstract

PURPOSE: To efficiently recover filter media consisting of diatomite for brewery by allowing org. components in a filtration residue to safety arrive at a high- temp. process chamber, safety combusting this component and avoiding the transpiration of the org. components in the filtration residue within a flow drying device. CONSTITUTION: The high-temp. process chamber 7 having a vertical type reaction chamber 10, a processing gas introducing vortex generator 11 and a drying fluid introducing pipe 12 is constituted as a vortex reactor. A processing gaseous stream generator 13 is provided with a combustion chamber 14, a fuel feeder 15, a compressed air feeder 16 and an outdoor air feeder 17. Further, a rapid cooler 19 and a cooler 19 are connected to a high-temp. gas cyclone device 8 subjected to refractory ceramic coating 18. A feeding conduit system 20 is provided with an injected water cooler 22 acting cooperatively with an adjuster 21 in such a manner that the temp. of the dry gaseous stream may be adjusted to a relatively low introducing temp. in order to prevent the transpiration of the components incorporated and carried into the filtration residue in a flow drier 3.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a system for dispensing well-finely divided filtration residue and for drying and dispersing the filtration residue in a stream of dry gas to be dispensed. a gas flow drying device for dry powder separation, consisting of a cyclone device and a solid filter, a high-temperature treatment chamber for treating the dry powder in the process gas stream, and the powder to be treated. a high-temperature gas cyclone device for separating the powder from the process gas stream and a cooling device for the separated and treated powder, connected in the order shown in the flow sheet to separate the treated powder. Diatomaceous earth of a defined particle size distribution, mechanically dehydrated in the brewery, organic composition and optionally expanded, in order to be usable as a brewery filter material. <-A device for recovering filtration residue containing light or vermiculite and a method therefor.

In the present invention, diatomaceous earth is a mineral material (Rδmpps C
hemie-Lexikon (1973) 1770
(see page). The muddy filtration residue discharged from breweries contains diatomaceous earth as well as other filter media. For example, expanded perlite or miculite. The filtration residue naturally contains substances separated during the filtration, especially organic matter. The amount of perlite and vermiculite Generally, the amount is small, on the order of several percent by weight.In this type of filtration medium, consideration must be given to extremely small particle size for mechanical reasons.Silica gel, which is used together with diatomaceous earth in the contact method, is also included in the filtration residue. Therefore, the residue produced by filtration has a composition of ~
) and differ from brewery to brewery. Since filtration is performed according to the operating practices of each brewery, the filtration residue contains diatomaceous earth as a main component, but experience has shown that these differ. By dispersing this and ``analyzing'' the filtration residue, we can understand its composition.

(Prior art) A known device (Brauwelts 1) that forms the cornerstone of the present invention
988, pp. 2332-2347) is for purifying filtration residues so that they do not cause problems. It is difficult to recover brewery filter media containing diatomaceous earth with operational stability using the above-mentioned known apparatus. This known regeneration process results in an undesired conversion of the amorphous silicic acid contained in the diatomaceous earth to crystalline silicic acid. Furthermore, the operational stability of this known device needs to be improved. That is, agglomeration of the powder and υF discharge of the dry gas lead to precipitation in the filter device in which it is to be carried out. In particular, this disorder
This is especially true when the filter residue contains residues of various different materials. This known device consumes a lot of energy and requires careful purification of the gas used so as not to have a negative impact on the environment.

Therefore, the technical problem in this field to be solved by the present invention is that it is possible to efficiently recover a brewery filter material made of diatomaceous earth using an apparatus having the basic configuration described in the opening section (Technical Field). It is an object of the present invention to provide a recovery device that can be used to collect diatomaceous earth and that does not cause any harmful or undesirable changes in diatomaceous earth in terms of powder particle composition.

(Summary of the Invention) However, the above-mentioned technical problem is solved by a rigid reaction chamber (10) having a cross-sectional shape, a vortex generation device (11) for introducing a processing gas concentrically provided below it, and the reaction chamber (10). ) A high-temperature treatment chamber (7) is configured as a vortex reactor, and has a drying fluid introduction pipe (12) protruding into the high-temperature treatment chamber (7). A flow generator (13) is connected to the combustion chamber (
14), liquid cane and/or gaseous fuel delivery device (15)
, compressed air supply device (16) and outside air supply device (1)
7), in which the generated process gas stream has sufficient temperature, sufficient oxygen and sufficient flow energy to burn out the organic components, and to separate approximately 80% solids; A high-temperature gas cyclone device (8) with a refractory ceramic coating (18) is equipped with a quenching device t (19) for the separated solids.
) is connected between the cyclone device and the cooling device (9), and is connected to the high temperature gas cyclone device (8).
) is connected to the gas stream drying device (3) via a feed conduit system (20) and discharged from the hot gas cyclone device (8), approximately 20
A high temperature gas containing a solids content of
), the feed conduit system (20) is provided with an injection water cooling bag fi (22) acting in cooperation with the regulating device (21), thereby In order to prevent components entrained in the filtration residue from transpiring in the gas flow drying device (3), the temperature of the drying gas stream can be adjusted to a relatively low introduction temperature. The present inventors have discovered that the problem can be solved by a filtration residue recovery device characterized by the following.

The present invention basically comprises a Vj arrangement for recovering diatomaceous earth-containing brewery filtration media from filtration residue, as described orally.
The starting point is the recognition that the structure should be such that the organic components in the filter residue can reach the high temperature treatment chamber virtually safely and be burned there as safely as possible. Furthermore, the present invention provides that the filtration residue is removed in a gas stream dryer in order to avoid the need for costly separate purification equipment for the waste air which leads to sedimentation in the solid filter and which has to be discharged. It is based on the recognition that the organic components inside must not be evaporated. On the other hand, when processing filter residues containing various organic components, the processing gas (flue gas) discharged from the high-temperature processing chamber or high-temperature gas cyclone due to combustion is also various, and moreover, be. However, according to the invention, the temperature of the drying gas stream can be adjusted to the appropriate temperature by spray water cooling in a very short time, so that the treatment gas can be introduced into the gas stream drying device without consuming large amounts of energy. Due to the high temperature, H dispersion of organic components in the gas flow drying device does not occur. In the apparatus of the present invention, the solids entrained in the dry gas stream do not aggregate into agglomerates (and can be easily crushed).The average residence time of the dry powder in the high-temperature treatment chamber is extremely short. It is set such that no conversion of non-setting silicic acid to crystalline silicic acid takes place. The rapid cooling of the treated powder leaving the hot gas cyclone prevents this conversion. The powder treated by quenching, which may sometimes exhibit lava-like flow behavior during processing in the processing chamber, can be transported and handled by conventional equipment as soon as it leaves the hot gas cyclone. Through the combination of various measures taken in the powder composition, we have been able to improve the powder composition without causing any unfavorable changes in diatomaceous earth. Stable recovery from muddy filtration residue has been made possible.

The device according to the invention can be operated with extremely low energy consumption.

The configuration and arrangement of the device of the present invention can be modified in detail within the scope of the present invention. A preferred embodiment of the invention is characterized in that the organic components in the filtration residue can be burnt very completely, and the high-temperature treatment chamber is comprised of a reaction chamber with a bulb-shaped longitudinal section and a vortex generator with a small diameter cross section and a It is characterized by having a gas outlet. The high temperature processing chamber may be operated with a processing gas whose inlet temperature is greater than about 600°C.

The high-temperature gas cyclone is preferably equipped with a quenching device composed of a gradient path or a spiral path cooled by water. The powder to be treated is discharged with a very short residence time in a high temperature gas cyclone, at a temperature of approximately 800°C, which is then cooled to 550°C or lower. Preferably, the jet water cooling device has a very sensitive and quickly controlled circuit for controlling the temperature of the drying gas stream. Further, it is preferable that the gas flow drying device is provided with an impact direction changing device upstream of the cyclone device, so that the agglomerates are crushed by impact here.

Since the device according to the invention can be controlled and adjusted over a wide range, it can be used as a starting material to produce filtration materials for breweries in response to all conditions, for example, even when the filtration residue has an extremely wide variety of materials and compositions. It can be recovered. In this connection, a preferred embodiment of the method according to the invention provides, for example, when loading filter residues of various materials discharged from various brewing apparatuses or breweries, this mixed residue is brought to a composition typical of the apparatus by mixing. It is characterized in that it is standardized and then fed into a gas flow dryer.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

The apparatus shown in FIG. 1 is for recovering diatomaceous earth as a filtration material for breweries from mechanical press filtration residues generated in breweries. The filter residue consists of diatomaceous earth with a defined particle size distribution, the components separated by filtration and optionally expanded perlite or vermiculite or gel. The basic configuration of this device is as follows: First, a feeding device I for the filtration residue to be fed.
has. This is shown at the left end of FIG.

The filtration residue to be fed by the feeding screw 2 or other feeding means is sufficiently pulverized and transferred to the gas flow drying device 3.
configured to be introduced in This is treated with a flow of dry gas flowing from bottom to top, the gas flow velocity being high enough to entrain the finely divided filter residue.

The basic configuration of this device further includes a cyclone 4 and a solid filter 5. Both of them are combined to constitute dry powder separation devices 4 and 5. The drying gas stream is then introduced as scrubbing air into the heat exchanger 6, where it serves to heat the outside air introduced into the device and, after appropriate purification treatment, is discharged into the atmosphere.

Of particular importance in the device according to the invention is the high temperature treatment chamber 7 for the treatment of dry powder contained in the treatment gas stream. A hot gas cyclone device 8 is provided to separate the treated powder from the treatment gas. Next, a cooling device 9 for the separated processed powder is provided.

The above-mentioned devices are arranged in the order indicated by arrows on the flow sheet, depending on the order of processing for carrying out the method of the present invention.

Note that this flow sheet describes temperatures or temperature ranges that are important in the present invention. Flowsheets do not contain further detailed descriptions. The treated powder can of course be reused as filter media for breweries.

As can be understood by comparing and observing Figures 1 to 3, a rigid reaction chamber 10 with a cross-sectional shape is formed in the high-temperature treatment chamber 7 as a perflow reactor, and a rigid reaction chamber 10 with a cross-sectional shape is formed below it. A vortex generating device 11 for introducing a treatment gas flow is provided, and the reaction chamber 10 is
A dry powder introduction pipe 12 is provided concentrically above and protrudes into the pipe. A processing gas flow generator 13 is connected upstream of the high temperature processing chamber 7 . The processing gas flow generating device 13, a combustion chamber 14, a pipe 15 for introducing liquid and/or gaseous fuel, a pipe 16 for introducing compressed air, and a pipe 17 for introducing outside air are provided. Process gas stream generator 13 is configured to deliver a process gas stream of sufficient flow rate into high temperature process chamber 7 with sufficient temperature and oxygen content for organic component combustion. The hot gas cyclone device 8 is provided with a lining 18 made of refractory ceramic. A 9 solids content residue of approximately 80% is processed here.

A separate solids quenching device 19 is connected to this high temperature gas cyclone device. That is, this quenching device is arranged between the cyclone device 8 and the cooling device 9 described above. The high temperature gas outlet of the high temperature gas cyclone device 8 is
It is connected to the gas flow drying device 3 via a feed line system 20 .

The hot gas from the cyclone device 8 contains approximately 20% solids and is supplied as a dry gas stream to a gas stream drying bag r113.
It may also be fed in circulation. However, other processing methods are also possible. The feed line system 20 is operated with a control 2i position 21. A water jet cooling device 22 is provided to reduce the temperature of the drying gas stream to a relatively low introduced gas temperature in order to prevent the batter components mixed and entrained in the filtration residue from gasifying in the gas stream drying device 13. Can be adjusted.

As can be seen from FIGS. 2 and 3, the high-temperature treatment chamber 7 has a reaction chamber 10 having a bulb-shaped longitudinal section, a vortex generator 11 and a gas outlet 23 having a smaller diameter than the reaction chamber 10. The high temperature treatment chamber 7 is adjusted to the temperature specified in the flow sheet. The process gas stream is placed in a high temperature process chamber 7 at a temperature above about 600°C, above the ignition point of the machine string components to be combusted in each case.
be introduced within. In a preferred embodiment of the invention, the high temperature treatment chamber 7 is under reduced pressure and may be configured in the form of a truncated cone, as shown in FIG.

As already mentioned, the quenching device 19 consists of a water-cooled slope or spiral path. The injection water cooling device 22 belongs to the control circuit for the dry gas stream temperature. In the upper part of the gas flow drying device, in front of the cyclone device 4 (downstream side)
An impact deflection device 24 can be provided in which the agglomerates are broken up by impact comminution. The powder that separates from the drying gaseous fluid and falls therethrough is returned to the filter residue feed device 1 through the illustrated conduit 25. The dry powder separated by the cyclone device 4 and the dry powder separated by the filter 5 are fed to the high temperature processing chamber 7 by a conveying device 26 shown in FIG. A portion can also be returned to the feeding device 1.

Preferably, a device (not shown) is provided above the high-temperature treatment chamber 7, also referred to as a vortex generator, which allows a gas flow to enter the treatment chamber more or less in the tangential direction.

This purifies the wall surface of the high temperature processing chamber 7 and improves the reliability of operation. The hot gas cyclone wall can be provided with baffles, also not shown. This also includes cyclones 8 to accommodate vortices or control vibrations.
This baffle plate ensures that sufficient powder is delivered to the gas flow drying device 3 together with the drying gas flow.

Furthermore, smooth flow within the hot gas cyclone 8 and rapid primary cooling are also required.

[Brief explanation of drawings]

Figure 1 is a schematic diagram of the apparatus of the present invention shown in a flow sheet; Figure 2 is an enlarged cross-sectional view of the high-temperature treatment chamber at section A in Figure 1; Figure 3 is a cross-sectional view taken along line B-B in Figure 2; be. The correspondence between the main parts of the device of the present invention and the symbols is as follows. 1... Line residue feeding device, 2... Feeding screw 3
...Gas flow drying device, 4...Cyclone, 5...
Solid filter 6... Heat exchanger, 7... High temperature treatment chamber, 8... High temperature gas cyclone, 9... (Powder) cooling device, 10... Reaction chamber, 11... Vortex generation Device,
12... Pipe (for dry powder introduction), 13... Processing gas flow generator, 14... Combustion chamber, 15... Fuel introduction pipe, 16... Compressed air introduction pipe, 17 ...Outside air introduction pipe, 18...Ceramic lining, 19...
・Solid content quenching device, 20...Feeding conduit system, 21...
Adjustment device, 22... Water injection cooling device, 23... Gas discharge port, 24... Collision direction changing device

Claims (7)

[Claims] (1) A feeding device for sufficiently finely ground filter residue to be fed, a gas flow drying device for drying and dispersing the filter residue in the fed dry gas stream, and dry powder separation. a separation device consisting of a cyclone device and a solid filter for; a high-temperature treatment chamber for treating the dry powder in the process gas stream; and a high-temperature gas for separating the powder to be treated from the process gas stream. a cyclone device and a cooling device for the separated and treated powder, connected in the order indicated in the flow sheet, in order to enable the treated powder to be used as a brewery filter medium; A device for recovering a filter residue containing diatomaceous earth of a defined particle size distribution, an organic composition and optionally expanded perlite or vermiculite, which has been mechanically compressed and dewatered in a brewery, having a cross-sectional shape of A solid reaction chamber (10), a vortex generator (11) for introducing process gas concentrically provided below the reaction chamber (10), and a vortex generator (11) provided concentrically above the reaction chamber (10) and extending into the reaction chamber (10). A high-temperature treatment chamber (7) having a drying fluid introduction pipe (12) is configured as a vortex reactor, and a treatment gas flow generator (13) is connected to the high-temperature treatment chamber (7), which is connected to the combustion chamber. (14), liquid and/or
Alternatively, a gaseous fuel supply device (15), a compressed air supply device (16) and a fresh air supply device (17) are provided, so that the process gas flow generated is sufficient to combust the organic components. The gas is separated into a high-temperature gas cyclone device (8) with a refractory ceramic coating (18), having a suitable temperature and sufficient oxygen and sufficient flow energy to separate approximately 80% solids. Quenching device for solids (19)
is connected to the cyclone device and the cooling device (9).
), the hot gas outlet of the hot gas cyclone device (8) is connected to the gas flow drying device (3) via the feed conduit system (20), and the hot gas outlet from the hot gas cyclone device (8) is connected to the gas flow drying device (3). Approximately 20
A high temperature gas containing a solids content of
), and the feed conduit system (20) is provided with a jet water cooling device (22) acting in cooperation with a regulating device (21), by means of which the filtration In order to prevent the components entrained in the residue from evaporating in the gas flow drying device (3), it is possible to adjust the temperature of the drying gas flow to a relatively low introduction temperature. Features: Filtration residue recovery device. (2) A filtration residue recovery device according to claim (1),
The high temperature treatment chamber (7) is a reaction chamber (1) having a light bulb shape in vertical section.
0) and a vortex generator (11) and a gas outlet (23) having a cross section with a smaller diameter than this. (3) The filtration residue recovery device according to claim (1) or (2), characterized in that the high temperature treatment chamber (7) is configured such that a treatment gas at a temperature of about 600°C can be operated. device to do. (4) A filtration residue recovery device according to any one of claims (1) to (3), characterized in that the high temperature gas cyclone device (8) is equipped with a quenching device (19) that is cooled with water. Device. (5) A filtration residue recovery device according to any one of claims (1) to (4), wherein the jet water cooling device (22) connected to the feeding conduit system (20) has a temperature of the dry gas stream. A device characterized by comprising a control circuit. (6) A filtration residue recovery device according to any one of claims (1) to (5), wherein the gas flow drying device (3) is arranged upstream of the cyclone device (4), and is configured to crush aggregates. A device characterized in that it comprises a collision direction change device (24). (7) A method of operating a filtration residue recovery device according to any one of claims (1) to (6), which includes, for example, when loading filtration residues of various materials discharged from various brewing devices or breweries. A method characterized in that the filter residue is standardized by mixing to a composition typical of the device and then fed to a gas flow drying device.