DE202008001281U1 - Apparatus for recovering heat from warm sewage air - Google Patents

Abstract

contraption (10) for the recovery of Heat off warm sewer air, characterized in that the device is formed as a shaft whose rectangular interior through Scotsman is interrupted. Where the air flow through the connecting line 12 in the cavity between interior and bulkhead flies, where a Means (13) is arranged, which extracts the channel air heat and the heat to a heat recovery unit (18).

Description

The Energy stored in wastewater is usually wasted in the drains are derived.

The However, use of this energy is becoming increasingly important.

at a known heat recovery device become collection containers used, in which the wastewater is collected for a short time. The collected wastewater is then removed from the heat.

Such a device is for example from the DD 251 679 A3 known.

A similar acting device shows the DE 41 16 919 A1 , This dirty water is passed into an overflow basin containing cooling coils for heat extraction.

at These devices pose the risk of settling of dirt and / or faeces. This results in the necessity of using a Fäkalienzerkleinerers and / or a dirty water pump.

at Another device for using the waste heat from wastewater is not only the warm sewage over a device for heat extraction passed, but in addition Warm, household exhaust air is in contact with the wastewater brought to the sewage to supply more heat. Here, however, the exhaust air not used in the duct. Here too the decor for heat extraction is applied directly to the wastewater, here is the Danger of settling dirt.

The DE 202 03 713 U1 relates to a device for the production of heat energy, in which exhaust air from the channel is passed through a heat exchanger, which in turn passes the heat to a heat recovery unit (heat pump). The device is located in a building a short distance from the wall or the roof.

Another method ( Journal BFT, 2005, Issue 11, p. 16/20 ) provides, to form a device for heat removal from waste water according to the principle of a double-tube heat exchanger and to circulate a heat exchange medium in the annular space between the outer and inner tube. Since almost the entire pipe jacket acts as a heat exchanger surface, not only the waste heat of the waste water, but also the waste heat from the duct air can be used. This device is designed as a special sewer pipe. In order to achieve a satisfactory heat transfer gear, a large length of the double-tube sewer is required, which is associated with great technical effort.

A another method is described in my assigned patent 102006053575.

The here for approval has the same objective, however, uses significantly different technology.

outgoing Of the latter prior art is the present application the task of specifying a device with the low technical effort heat recovered from warm sewage air can be.

These The object is achieved by a device having the features in the claim 1 solved.

There in the device according to claim 1, the device for heat removal is drained from the exhaust duct but not from the sewer system, deleted the problem of settling of dirt and feces and the associated Need for a fecal crusher. disorders in the flow can be avoided. Also, no dirty water pump is required.

By the formation of the device according to the invention as a shaft is the effort for the heat recovery low. It does not need long pipe strands laid, but only on individual points of the pipe strands in each case a shaft to be set. If necessary, you can even existing manholes be used to install the device later.

Of the Shaft is connected by means of a connecting line with the drainage channel connected. As a result, the air can flow into the device for heat removal. The natural Behavior that warm air rises, and the fact that everyone Channel a slope has support the flow.

Further Embodiments of the device according to the invention are in the dependent claims specified.

The system is based on three essential components:
heat recovery chute
Sensor and control
Heat exchanger / heat pump.

The heat recovery shaft consists of several components: a rectangular shaft which is insulated on the outer wall. One or more vertical foreclosure, a thermal insulation material, a device for airway control, a Einrich tion for Wärmeent as well as valves, motors, control flaps and pipework with air volume control. In addition, the heat recovery shaft has a bottom, lid and seals.

At the Inserting the foreclosures in the shaft will this in several Divided into chambers. The foreclosures on their part can due to the use of air permeable (cooling fins) or as a full-surface heat exchangers pronounced be. Mixed forms are also conceivable. The former is the warm air flows through the foreclosure and heat over the cooling fins to the heat transfer medium which in the cooling fins circulated. The second mentioned full-surface absorber is the air over a Airway control at the plane guided along and alternately over one with recess at the bottom or in the next chamber via a guided upper recess. As a result, the air flow in the counterflow principle is optimal at the Absorber passed. The absorbers are operated by means of roughing in parallel operation. Through the use of valves also group formations and the Additions or shutdowns by the Herhaus name from the entire group possible. The shaft is topped with a lid and bottom with a Closed bottom. Revision accesses are available. In the lower area of the first chamber are openings introduced so that the duct air into the interior of the first chamber can penetrate. These openings are dimensioned so that in case of a backwater in the channel penetrating foreign body can not get into the interior of the inner ring. The same applies to Vermin such as e.g. Rats.

Of the The path of the penetrating exhaust air flow is in the chamber from the bottom of the shaft to the manhole cover by the means for airway control purposefully led. At the same time the air is directed from one chamber to the next. This happens by bundling and steering the airflow. By flowing through the chambers is Thermal energy withdrawn.

The cooled Channel air is through one in the last chamber in the cover of the shaft attached exhaust duct led. This line contains sensors for e.g. the air flow control and temperature measurement. Furthermore, the exhaust duct contains Devices for airflow maximization (engines) or airflow reduction (Control valves).

Of the Cover of the heat recovery shaft is flush placed. It prevents the escape of heated channel air as well as the penetration of rainwater. For maintenance purposes, the lid can be removed.

Around the local To meet conditions, there is the possibility to add more to the lid Components such as e.g. Rejuvenation pieces to install. This allows the lid diameter to be stepped on e.g. the measure of one Manhole covers are tapered. This is shown in the accompanying drawing.

The in the heat recovery shaft and Sensors mounted in the exhaust air flow provide data to the control unit. The program module of the control unit controls the heat recovery unit.

The Control is carried out by evaluation of the supplied by the sensors Data, the comparison with the parameters stored in the program code and execution of program routines.

The Control monitored and controls the heat recovery unit and the valves.

The heat recovery unit is by means of the piping and valves with the device for heat extraction connected. The valves can individual heat transfer circuits to turn on or off. Through this coupling, it is possible to the channel air extracted heat to the heat recovery unit to transport. The heat recovery unit is preferably a heat exchanger and / or a heat pump, which the recovered Heat to further use.

The Placement of the heat recovery unit and the controller can individually to the local Be adapted to circumstances.

Of the heat recovery chute is connected by means of a connecting line to the sewer. The connecting line has a slope from the heat recovery shaft to the sewer towards, so that only exhaust air, but no sewage can rise.

in the Interplay of all components (control, valves, heat recovery unit, installation for heat extraction, Device for airway control and sensors) can be a needs-based Heat recovery respectively.

The Device will be explained below with reference to the drawing.

It demonstrate:

1 a representation of the shaft in an oblique view with transparent shaft wall and a horizontal section through the shaft, with sensor and pipe connections.

2 a device designed as a shaft for the recovery of heat from warm sewer air, with top view with the lid open A device for recovering heat from the sewer 10 contains a shaft 11 whose rectangular interior is by bulkhead 30 interrupted. The outer walls are completely insulated 34 ,

The outer wall is by means of the introduced at the bottom of the shaft connecting cable 12 connected to the drainage channel system. The air flow flows through the connection line 12 in the cavity 13 between inner wall and bulkhead. The duct air is controlled by means of the airway control and the device for airway control 26 direction out. The air flow is through the device for heat extraction 13 extracted heat once or several times. The cooled channel air can then via the discharge for duct air 15 which by a lid 14 is guided, escape to the outside. The air flow rate can be achieved by means of devices for air flow maximization or reduction 16 to be influenced. For this, the values of various sensors 22 evaluated.

The connections for the device for heat extraction 13 , Sensors and / or other lines can through the lid 14 and / or through an implementation 23 respectively. The lid 14 Closes the system flush and hermetically.

The heat recovery unit 18 is by means of a piping 19 and valves 20 with the device for heat extraction 13 connected.

In the piping 19 There is a heat transfer medium, which is the heat in the shaft 11 removes and to the heat recovery unit 18 transported. There, the heat can be forwarded directly to consumers or, for example, be further processed by means of a heat pump.

A controller 21 offers the possibility to evaluate the operating parameters and the parameters of the sensors 22 , A saving, self-monitoring and remotely controllable behavior is present.

10

contraption

11

shaft

12

connecting cable

13

Facility for heat extraction

14

cover

15

derivation for channel air

16

devices for airflow maximization or reduction

17

ground

18

Heat recovery units

19

piping

20

valves

21

control

22

Sensors / sensor lines

23

execution

24

sensor Cable

25

bulkhead

26

facilities for airway control

34

thermal insulation on the outer walls

40

rejuvenation piece

Claims (15)

Contraption ( 10 ) for the recovery of heat from warm sewer air, characterized in that the device is designed as a shaft whose rectangular interior is interrupted by bulkhead. Where the air flow through the connecting line 12 flies into the cavity between the interior and the bulkhead where a device ( 13 ) which removes heat from the channel air and transfers the heat to a heat recovery unit ( 18 ). Contraption ( 10 ) according to claim 1, characterized in that the shaft is installed in the ground. Contraption ( 10 ) according to claim 1 or 2, characterized in that in the intermediate space one or more bulkheads ( 25 ), which may be both air-permeable and air-permeable Contraption ( 10 ) according to claim, characterized in that all outer walls are thermally insulated ( 34 ) are. Contraption ( 10 ) according to one of claims 1 to 6, characterized in that the heat recovery unit ( 18 ) by means of a piping ( 19 ) and valves ( 20 ) with the device for heat extraction ( 13 ) and the flow connections and / or heat exchange connections can be produced and separated. Contraption ( 10 ) according to one of claims 1 to 7, characterized in that the shaft has a cover ( 14 ) and a floor ( 17 ) having. Contraption ( 10 ) according to claim 8, characterized in that sensors ( 22 ), Sensor cables ( 24 ), other piping and piping ( 29 ) through the lid ( 14 ) and / or in the bushings ( 23 ) can be introduced. Contraption ( 10 ) according to one of claims 1 to 9, characterized in that the duct air supplying the duct air ( 12 ) in manhole bottom close to the shaft ( 11 ). Contraption ( 10 ) according to claim 11, characterized in that the dimensioning of the openings ( 12 ) is done so that the penetration of foreign bodies in the or animals is avoided. Contraption ( 10 ) according to any one of claims 1 to 12, characterized in that within the shaft the air flow of the duct air through facilities ( 26 ) is guided purposefully for airway control. Contraption ( 10 ) according to claim 13, characterized in that for discharging the channel air from the duct serving derivative is present, the Vorrochtung for air flow maximization or reduction ( 16 ) and is directed from there to the outside. Contraption ( 10 ) according to one of claims 1 to 14, characterized in that it is adapted individually to the local conditions by means of additional components, for example, rejuvenation pieces ( 40 ), can be adjusted. Contraption ( 10 ) according to one of claims 9 to 15, characterized in that a controller ( 21 ) depending on the sensors ( 22 ) reported values in the derivative ( 15 ) and the device for heat extraction ( 13 ) programmatically one in the piping ( 19 ) existing flow connection with the heat recovery unit ( 18 ) controls. Contraption ( 10 ) according to claim 13, characterized in that the controller ( 21 ) Data at the heat recovery unit ( 18 ) or takes over their control functions. Contraption ( 10 ) according to one of claims 1 to 14, characterized in that it detects parameters and provides them for evaluation.