DE19915350A1 - Thermal insulation of a biogas reactor comprises pouring concrete into an annular space containing foam boards and reinforcing mats - Google Patents

Abstract

A method for thermally insulating a biogas reactor comprising a cylindrical outer shell and a concentric inner shell on a base comprising placing a series of flat hard-foam boards against the inside of the outer shell without fixing them to the shell, gluing the boards together and to the base, placing reinforcing mats between the foam boards and the inside of the inner shell, and pouring concrete into the cavities between the reinforcing mats and the foam boards and inner shell, is new.

Description

The invention relates primarily to the thermal insulation of biogas reactors cylindrical shape, which consist of concrete, the insulation layer itself Rigid foam sheets are formed.

The thermal insulation by means of rigid foam panels has so far been carried out so that the commercially available rigid foam panels on the outer skin of the to be insulated Objects such as buildings, containers and the like can be attached.

Especially in the manufacture of thermally insulated cylindrical containers Concrete, e.g. B. from biogas reactors, is the subsequent isolation with rigid foam panels are very labor-intensive and therefore require high costs.

To achieve optimal heat insulation, it is necessary that the hard Foam sheets lie intimately on the outer skin of the reactor. Because of this mostly cylindrical in shape, this is only possible by using special Molded plates manufactured for each individual case possible because of the rigid foam plates are brittle and can only be bent very slightly.

When using flat rigid foam panels for the thermal insulation of cylindrical objects are created between rigid foam sheets and cylin air object in the edge areas of the rigid foam panels, So cold bridges that negatively affect the intended thermal insulation rivers. It can also be used to disrupt uniform heat biological process in the biogas reactor.

The invention is therefore the object of the prior art Technically resulting disadvantages in the thermal insulation of cylindrical Containers, especially biogas reactors, with commercially available, rigid foam Eliminate fabric panels and using thermal insulation from biogas reactors plan to create rigid foam panels, the elements of which are on the outer skin of the reactor fit snugly and thus provide optimal heat insulation.  

The effort required to apply the rigid foam is intended fabric panels as thermal insulation for the biogas reactor be very small and none require additional labor.

According to the invention, this object is achieved by the in the characterizing parts of the features mentioned solved.

The features described in the subclaims particularly include advantageous embodiment details of the invention.

The invention based on an embodiment and with With the help of drawings explained.

Show it:

Making a schematic front view of the biogas reactor of the invention with formwork, partially broken away, view of the individual layers bar Fig. 1,

Fig. 2 is a plan view in section along the line AA acc. Fig. 1

Fig. 3 shows a detail of the top view. Fig. 2.

In the exemplary embodiment, a biogas reactor with a cylindrical shape is described. Such reactors are usually cast directly at the point of use. For this purpose, an outer formwork 1 and an inner formwork 11 are placed. Since the biogas reactors can have outer diameters of 6 meters and more, wooden formwork is too expensive. Metal formwork is therefore used.

The commercial plan rigid foam plates 2 are at the inside of the outer casing 1 is now offset from one another (see Fig. 1) built up and each other, and the lower layer connected to the bottom plate of the biogas reactor by a connecting means 3, such as adhesive or building foam. Previously, the barb-like anchor bolts 4 are so pressed that their tips pointing inwards to the center of the reactor in the rigid foam plates. 2 Then existing steel wire mesh reinforcement mats 7 , which are connected to each other by hooks 8 , installed so that they are supported on the spacers 6 on the rigid foam panels 2 and on the spacers 10 on the inner formwork 11 .

The number of reinforcement mats 7 depends on the required strength values for the biogas reactor.

The anchor pins 4 are connected by bonding wire 12 to the first, the hard foam material plates 2 facing reinforcing mesh 7 so that the reinforcement mat 7 as a whole, the insulation formed by the rigid foam body panels 2 pull down. As a result, the buoyancy of the insulating body which occurs when pouring concrete is not effective, so that the rigid foam sheets 2 remain securely in the predetermined position. The spaces 5 are now poured with concrete, the spaces 9 also filling at the same time.

Formwork 1 and 11 are removed after the concrete has dried.

The following advantages result from the application of the invention:

• - The staggered arrangement and gluing or foaming of the rigid foam sheets of fabric with each other and the bottom row of them with the bottom plate of the biogas reactor and the attachment to the reinforcement mats results in a stable foam ring, which when pouring with concrete does not float.
• - There is no additional work for retrofitting the Rigid foam sheets required on the cast biogas reactor.
• - The barb-like anchor bolts hold the rigid foam panels firmly in the concrete.
• - The inside of the rigid foam panels lies snugly against the concrete cast, so that optimal thermal insulation values result.

List of the reference symbols used

1

outer formwork

2nd

Rigid foam sheet

3rd

Lanyard

4th

Anchor bolt

5

Space

6

Spacers

7

Reinforcement mat

8th

hook

9

Space

10th

Spacers

11

inner formwork

12th

Tie wire

Claims (4)

1. Thermal insulation of biogas reactors with a predominantly cylindrical shape, which consist of reinforced concrete, the insulation layer itself being formed from flat rigid foam panels, characterized in that on the inside of the outer formwork ( 1 ) flat rigid foam panels ( 2 ) without attachment to this formwork ( 1 ) are built adjacent, the rigid foam panels are connected to each other and their lower row to the bottom plate of the biogas reactor by a connecting means ( 3 ) that reinforcement mats ( 7 ) connected by hooks ( 8 ) via spacers ( 6 ; 10 ) both on the rigid foam panels ( 2 ) on the one hand and on the inside of the inner formwork ( 11 ) on the other hand and that the spaces ( 5 ; 9 ) are poured with concrete. 2. Thermal insulation of biogas reactors according to claim 1, characterized in that the rigid foam panels ( 2 ) are arranged offset. 3. Thermal insulation of biogas reactors according to claims 1 and 2, characterized in that in the rigid foam panels ( 2 ) barb-like anchor bolts ( 4 ) with the tip inward pointing towards the center of the biogas reactor and introduced via binding wire ( 12 ) with the reinforcement mats ( 7 ) are connected. 4. Thermal insulation of biogas reactors according to claim 1, characterized in that construction foam or adhesive is used as the connecting means ( 3 ).