WO2014195445A1 - Press for producing boards of material and method for operating such a press - Google Patents

Abstract

The invention relates to a press and to a method for operating a press for producing boards of material, means being arranged on the press (2) for extracting contaminated exhaust air, in particular for extracting exhaust air (72d) directly on the press (2) and/or for extracting exhaust air (72h) by means of a hood (6) arranged above the press (2). The invention addresses the technical problem of creating a press for producing boards of material and a method for operating such a press, by means of which reliable and functioning overall extraction of the press is possible. In particular, a press should be created that avoids uncontrolled air flows in the environment thereof and the does not thereby affect the functioning of surrounding system parts. At the same time, investment costs necessary for exhaust air purification with regards to the purification apparatus should be reduced, operation should be made more economical and the energy balance of the overall system should be improved. According to the invention means for the controlled supply of feed air (9) are arranged in functional connection with the press (2).

Description

 Press for the production of material plates and

 Method for operating such a press

The present invention relates to a press for the production of material plates according to the preamble of claim 1 and a method for operating such a press according to the preamble of claim 9.

These prior art methods and presses are known, for example, from DE 102 28 936 A1, which discloses a method and a double belt press for the continuous production of board materials in which a plate material is produced from loosely assembled particles with a binder under pressure and heat is, during the pressing at the lateral edge of a press line, the exiting substances by means of a

Suction ducts are sucked off. It is further provided to provide the partial suction of the press column with a targeted supply of supply air to the

To increase and improve suction power.

 There are other disclosures in the patent literature, such as DE 42 12 164 C2, DE 101 00 895 C2 or DE 101 00 896 C1, which describe such suction solutions in detail and offer individual cases for such presses.

The partially harmful substances that emerge before, after or during the compression from the pressed material or the material plate are problematic and also already known. The hitherto known state of the art offers only

Individual cases for certain areas of the system, which affect the inlet, the outlet and the press nip between the heating plates of the press, because in particular the energy consumption for extraction and especially for cleaning large volume exhaust air streams is costly and the necessary equipment is also expensive to purchase , Thus, the expert has assumed to this day that large-volume suction of a continuously operating press with a length of, for example, 60 m or a multi-daylight press of large height seems justified only in individual cases, even considered negative by the usual press operator and is not the rule. Plants, which previously have such a suction of the press, have the economic Disadvantage of a costly cleaning of large amounts of air and are disadvantaged in the competition.

Nevertheless, if a total suction, possibly with a Teileinhausung the press, arranged in the form of a hood, so large amounts of air are sucked.

This has the disadvantage that these quantities of air have to be substituted in the workshop and have to enter through the large number of openings (gates, doors, windows) of a workshop. It has been shown that a constant air flow in the workshop is not necessarily detrimental to the operation, as it can provide for a possibly regular and pleasant air exchange.

 A disadvantage of these fundamental and relatively uncontrolled air currents

Dust deposits that occur throughout the hall and for a high

Cleaning effort, since after prolonged operation of the entire system, the amount of dust could possibly cause the risk of dust explosion.

A disadvantage is also when there are external doors or gates near the press, which are opened suddenly or sporadically and provide for uncontrolled air currents or turbulence. In particular, the scattered (unpressed)

Fleece that is fed to the press for pressing, reacts sensitively

jerky air currents or air currents of high relative speed and reacts with shifts or warping of the material, which in the simple case to scrap, in the worst case damage to the press through

Material increases, can lead.

The present invention therefore has the technical object to provide a press for the production of material plates and a method for operating such a press, with which it is possible to enable a safe and functioning Gesamtabsaugung the press. In particular, a press should be created, the

avoids uncontrolled air currents in your environment and thus does not affect the surrounding system components in their functionality. At the same time necessary

Reduced investment costs for the exhaust air cleaning and the cleaning device, the ongoing operation more economical and the energy balance of the entire system can be improved Incidentally, the present invention is not limited to continuous (double-belt) presses, but also includes cycle presses as presses in the scope of protection. The solution for a press for the production of material plates is that, in operative connection with the press means for the controlled supply of supply air

are arranged. This applies in particular in connection with the extraction of the exhaust air of a press by means of a hood arranged above the press. Particular preference is hereby by means of a control or regulating device and hereby operatively connected adjusting mechanisms in the supply and / or exhaust air a regulation of

 Underpressure in the press, particularly preferably within a housing of the press, be performed in order to prevent leakage or too much entry of foreign air into the press or the enclosure. The solution to a method of operating a press for the production of

 Material plates is that the supply air is supplied to the press controlled by suitable means. This applies in particular in connection with the extraction of the exhaust air of a press by means of a hood arranged above the press. It is particularly preferred to carry out a regulation of the negative pressure in the area of the press, particularly preferably within an enclosure of the press, in order to prevent leaks or too much entry of foreign air into the press or the housing.

The process and the press are independently operable; but the press can also be used in particular for carrying out the method.

In particular, it is now possible to extract a press in its entirety, without turbulence or other incalculable air currents can occur in the factory or in the vicinity of the press. In particular, it is now of advantage that the total exhaust air volume of the exhaust air streams to be cleaned from the press by the reuse of the exhaust air streams as supply air, in particular as sealing air for shielding the exhaust air against the environment, can be used and by the reuse with regard to the (pollutant) loads is concentrated. At the same time this again increases the efficiency of the downstream one

Cleaning device or filter systems. In this overall system concept, it is now also possible to equip a factory building, which houses the press, with a conditioning air supply, which helps to significantly reduce the current energy consumption in open workshops. Plants with large-volume suction devices are usually operated in open workshops, which do not exactly simplify an ideal 24/7 production operation, especially in climatically difficult environments (near the equator or the poles). In particular, temperature fluctuations and air turbulence in the hall can sensitively disturb the sensor technology, the system technology or the material to be pressed (the nonwoven in the form strand) and significantly increase the production rejection.

For the press and for the process, the following additional features arise which, individually or in combination, can lead to a further improvement of the solution:

 - The means for supplying supply air can be directly and / or indirectly via a cleaning device and / or filter with the hood and / or the exhaust air of the press operatively connected. Indirectly to be understood that still other means, in particular for cleaning or filtration of the exhaust air, between the suction and the supply air devices may be arranged, in contrast to a direct connection of the exhaust air from the

 Suction device and the supply air device.

 The means for supplying the supply air should preferably be arranged below the press and / or preferably in the inlet and outlet area of the press. The supply air can also be used as a sealing air for thermal or

 Pollutant shielding can be used.

 - The hood of the press can essentially be used as enclosure of the press

 be running, but in particular has side walls, which are preferably arranged displaceably, in order to provide easy access to the press, but also to allow by a few handles, a visual inspection of the press at any location.

- The housing is usually located near the bottom, but can also close off to the side, the supply air in this case preferably via outlet below the press, preferably in one Digging, the foundation, below the press or through other supply openings (cable ducts ....) is supplied.

 - Locks, in particular as man and / or material locks, can be arranged in the housing of the press.

 - Preferably, such man and / or material locks can also be provided at the factory floor in order to simplify the controlled air flow of the press or the workshop.

 - The press can be located in a workshop and the workshop

 respectively their measuring devices and / or the control or regulating organs of the air flows of the workshop with the control and / or

 Control device be operatively connected.

 - The press and / or the workshop can with a fresh air supply and preferably for adjusting the temperature of the fresh air supply with a heat exchanger and particularly preferably the exhaust air with the

 Heat exchanger be operatively connected.

 - At least parts of the exhaust air of the press can be recycled as circulation air of the press.

 - In particular, with a circulation of air at the press always a

 predetermined proportion of the circulation air are transferred to the cleaning device, in particular continuously or regulated in conjunction with a concentration measurement of the exhaust air.

Further advantageous measures and embodiments of the subject matter of

Invention will become apparent from the dependent claims and the following description with the drawing.

The combination options shown in the figure description are all individually and independently and in any combination usable. In particular, individual sentences are also to be evaluated as independent characteristics.

The single FIGURE shows a schematic representation of essentially the material flow in the production direction 14 from left to right with further

corresponding arrow connections of the possible air currents. In this case, a system in a simplified representation for the production of a material plate essentially requires a forming strand 1, a press 2, a saw 3, a cooling device, here shown as a star turning device 4 and optionally a storage area 5. As shown simplified in the symbolism of the corresponding system parts, is in the form of strand 1, a non-descript nonwoven particles (fibers, chips, chips or the like) continuously sprinkled on a forming belt and optionally vented with a pre-press. In the press 2, preferably a continuous press, the web is pressed into a sheet of material, preferably cured by heat, and consolidated. As a press 2, a cycle press, preferably a multi-day press, would be conceivable, with a cycle press the endless web would be divided with a saw in front of the press. After the consolidation of the material plate (intermittently) or a material plate strand (continuously) is divided by at least one saw 3, the strand and / or the material plate assembled or trimmed. Subsequently, the finished material plate, in the

Usually still warm, stored in a cooling device, preferably in a space-saving Sternwender 4, then stacked after a first (cooling) waiting time and stored in a storage area 5 (for residual cooling) or possibly further processed immediately.

During the compression of the web to a material plate in the press 2, the production itself, the fleece or the material plate due to chemical reactions can emit emissions of pollutants. Also takes place in the environment of the press 2 a not inconsiderable amount of dust. Depending on requirements, these emissions can and can be extracted directly by means of exhaust devices as exhaust air 72 (exhaust air

72d) or indirectly (exhaust air 72h by means of the hood 6) sucked and cleaned depending on the local emission regulations more or less strongly by means of a cleaning device 1 1 and treated before they can be discharged to the environment as purified exhaust air 7.

The cleaning device 1 1 is not detailed and it is for the relevant possibilities (wet-electro-filter, thermal cleaning, ...) to clean the exhaust air to solids (dust, ...) and other dissolved pollutants (VOC, ...) referred to the state of the art. The skilled person realizes that with this multitude of possible extraction possibilities several 100,000 cubic meters of air volume per hour would have to be sucked off and cleaned, which means a high expenditure of energy during operation for the air circulation in this dimension alone.

In order to reduce the amount of air to be cleaned, in particular the amount of exhaust air, which must be carried out by means of an intensive air purification, especially for odors or other pollutants, the invention proposes, among other things before the press 2 as supply air, the exhaust air 72, 72d and / or 72h supply as circulation air 17. In a positive side effect, so that the total amount of fresh air per

Time unit, which must be supplied to the press 2, significantly reduced, which especially in a cool or hot ambient temperature, the need for air conditioning costs for the air in the factory floor 10 or the ambient air of the press or the fresh air supply 15 again significantly reduced.

In tropical or cold ambient temperatures, the fresh air must be cooled or heated from the outside before it can get to or in the plant or the workshop 10 itself, with the fresh air for the workers present there should be set to a uniform climate. Even the press 2 itself may be sensitive to temperature fluctuations and usually has an optimal temperature range for production, which should not be exceeded or fallen below. The material plate can also react sensitively if it emerges from the press 2 and is cooled too quickly in the subsequent system parts / areas or is not cooled down quickly enough from the chemical reaction zone (high temperature) according to the need. A space-saving and harmless storage in the storage area 5 also requires a predetermined maximum upper or lower temperature range.

Under these aspects, should a preferred press 2, in particular in an overall technical concept with the factory floor 10, a controlled or regulated overall concept for the air flow of the supply and exhaust air have, including the

Fresh air supply 15 includes, which can be adjusted via a heat exchanger (not shown) as needed in their temperature and / or humidity.

It is preferably provided that the heat exchanger with the exhaust air 7, usually in a countercurrent heat exchanger, according to positive or negative energy is supplied. In regions or seasons with a cold ambient air, the fresh air supply 15 is normally preheated with the exhaust air 7.

The fresh air supply 15 may in particular include a fresh air supply for the press 2, preferably directly from outside the factory floor 10.

In a preferred embodiment, the press 2 can not only have a hood 6, which is arranged above the press 2, but also a

bell-shaped hood 6, which is virtually inverted over the press 2 or even have a hood 6, which is designed as a housing 12. In this connection, but also separate side walls or air baffles 13 may be arranged, which serve in particular for air flow and / or Luftabschottung. This may be necessary for particularly aggressive binders that can be detrimental to surrounding equipment or maintenance personnel. The supply air device 8 should therefore essentially have two different supply lines, in particular the fresh air supply 15 and the optional

Circulation air 17 may include.

In a particularly preferred embodiment, the circulation circuit for the circulation air 17 will be designed such that the exhaust air 72, in particular after the cleaning device 1 1 and / or in particular substantially as circulating air 17 in the press or the factory hall 10 is circulated. The regulation or control of the predetermined proportion to be transferred to the cleaning device 1 1 in the case of a circulation of the exhaust air 72 to the press 2, in particular wind continuously or can take place regulated in conjunction with a concentration measurement of the exhaust air 72.

 Advantageously, for this and other purposes, a control or

Control device 16 may be provided. This device will perform both functions of control and regulation to fulfill their tasks and can not be fully represented in their complexity, so that a purely schematic representation of the control and regulation device 16 only with

Entrance arrows and exit arrows in the drawing has found its expression. This device can be responsible for the control or regulation of the exhaust air and / or the supply air and / or the pressures in the press 2, adjacent parts of the system and / or the and is provided with suitable measuring devices (pressure, volume, etc.) and / or control or Regulatory organs (valves, fans, ...) be operatively connected.

This is particularly necessary to ensure the optional air conditioning of the factory floor 10 in conjunction with a targeted fresh air supply 15 so that on the one hand the vacuum on the suction devices respectively the press 2 is maintained and on the other not unnecessarily acclimatized air or false air in the workshop 10th or get to the press 2.

In particular, it should be avoided that through the opening of various doors or windows uncontrollable false currents or turbulence in the plant respectively the factory hall 10 occur, the disruption of the operation or

Pollution of the system can lead.

In this sense, it is also envisaged that the invention is an air-conducting

Overall concept, in particular for the factory floor 10 in conjunction with the press 2 or other parts of the plant, proposes that a full-scale air flow, at least the main incoming and outgoing air flows, includes.

In addition, other variations that are conceivable in the schematic representation and the associated description of the figures subject of this invention, if you find according to the teachings of the invention influence in a reduction of the necessary total air flows. 1461

List of Reference Numerals: P1461

1st form strand

 2. Press

 3. saw

 4th star turners

 5. Storage area

 6th hood

 7. exhaust air

 72 exhaust air from 2

 72d exhaust air directly

 72h exhaust hood

 8. Supply air device

 9. Supply air

 10th workshop

 1 1. cleaning device

 12th enclosure

 13. Air baffle

 14. Production direction

 15. Fresh air supply

 16. Control device

17. Circulation air

Claims

claims 1. Press for the production of material plates, wherein on the press (2) means for the extraction of contaminated exhaust air, in particular for the extraction of exhaust air (72d) directly to the press (2) and / or for the extraction of exhaust air (72h) by means of a above Press (2) arranged hood (6) are arranged, characterized Porsche Style nzeich that in operative connection with the press (2) means for the controlled supply of supply air (9) are arranged. 2. Press according to claim 1, dad urch in that at least one air baffle (13) and / or at least one supply air device (8) are arranged as means for the controlled supply of the supply air (9). 3. Press according to claim 1 or 2, dad urch in that the means for supplying the supply air (9) are suitable, the supply air (9) punctiform or linienformig, in particular linienformig as sealing air for sealing off the exhaust air of the press (2) relative to the Environment, feed. 4. Press according to one or more of the preceding claims,  characterized in that the means for supplying the supply air (9) below the press (2) and / or preferably in the inlet and outlet region of the press (2) are arranged. 5. Press according to one or more of the preceding claims,  characterized in that the hood (6) of the press (2), in particular in connection with the baffles (13) or  corresponding side walls, essentially as an enclosure (12) of the press (2) is executed. 6. Press according to one or more of the preceding claims, characterized in that in the housing (12) of the press (2) locks, in particular as man and / or material locks, are arranged. 7. Press according to one or more of the preceding claims, characterized in that the press (2) further comprises a control and / or regulating device (16) for the control or regulation of the exhaust air and / or the supply air and / or the pressures in the Press (2), which is operatively connected to suitable measuring devices and / or control or regulating organs. 8. Press according to one or more of the preceding claims,  characterized in that the exhaust air (7, 72, 72 d, 72 h) with the supply air device (8) of the press (2) is operatively connected. 9. A method for operating a press for the production of material plates, wherein on the press (2) contaminated exhaust air, in particular directly to the press (2) and / or by means of a above the press (2) arranged hood (6) is sucked, characterized in that the press (2) the supply air (9) is supplied controlled by suitable means. 10. The method according to claim 9, characterized Porsche Style nzeich net, that the supply air (9) at least via an air guide plate (13) and / or at least one Zuluftvorrichtungen (8) is supplied. 11. The method according to claim 9 or 10, characterized in that the means for supplying the supply air (9) are suitable, the supply air (9) punctiform or linear, in particular linear as sealing air for sealing off the exhaust air of the press (2) relative to the environment to feed. 12. The method according to one or more of the preceding  Method claims, dad urch in that the supply air (9) below the press (2) and / or preferably in the inlet and outlet region of the press (2) is supplied. 13. The method according to one or more of the preceding Method claims, dad urch in that the hood (6) of the press (2), in particular in connection with the air baffles (13), substantially as an enclosure (12) of the press (2) is executed. Method according to one or more of the preceding  Method claims, dad urch in that at least parts of the exhaust air (7, 72, 72 d, 72 h) of the press (2) as circulation air (17) of the press (2) or the supply air device (8) is supplied. Method according to one or more of the preceding  Method claims, dad urch in that by means of a control and / or regulating device (16) air streams, in particular the exhaust air and / or the supply air, and / or the pressure within the housing (12) of the press (2), in particular with suitable measuring devices and / or control or regulating organs regulated and / or controlled. 16. The method according to the preceding method claim, characterized in that the press (2) in a workshop (10) is arranged and the factory building (10) respectively their measuring devices or control or regulating organs of the air flows with the control and / or regulating device (16) are operatively connected. 17. The method according to one or more of the preceding  Method claims, dad urch in that the press (2) and / or the workshop (10) with fresh air, preferably from the environment, via a fresh air supply (15) is supplied and  in particular, the fresh air is adjusted with a heat exchanger to a predetermined temperature. 18. Method according to one or more of the preceding  Method claims, dad urch in that at a Circulation of the exhaust air (72) at the press (2) always a predetermined proportion of the circulation air to the cleaning device (11) is passed, in particular continuously or regulated in conjunction with a  Concentration measurement of the exhaust air (72).