DE2820577A1 - Combustion gas waste heat recovery equipment - uses heat exchanger in place of smoke tube - Google Patents

Abstract

The equipment recovers waste heat from combustion gases, using a heavy-duty heat exchanger mounted in place of the smoke tube. The heat exchanger can be of the plate, laminated or tubular tupe, and a manually and/or automatically controlled shutter can be provided for the bases.

Description

Title:

Process for heat recovery from exhaust gas heat from heating systems by means of a heat exchanger as a smoke pipe and automatic exhaust flap.

Field of application: The invention relates to a device for heat recovery for installation in heating and central heating systems with hot water preparation in place or in connection with the exhaust pipe.

Purpose: The invention is used to store energy or to use it the otherwise unused thermal energy of the heating exhaust gases escaping into the open air.

State of the art: With the heating systems used today the heating water heated by the boiler cools down considerably after it has passed through the heating system back to the boiler. Furthermore, the escapes in heating systems approx. 23c-320 degrees Cel. hot exhaust gas into the open without any further use.

Criticism of the state of the art: In this way, a considerable one remains Part of the energy largely unused.

Task: For the invention, the task is to remove the unused energy to be used for heating the return water.

Solution: The task is solved in the following way: (see puch drawing No.

I.oo9.EB - PR.78) The exhaust gases coming from the boiler (index 1) are passed through the heat exchanger and go into the chimney behind a flue gas flap (Index 2). The return water (index 3) coming from the heating system is in a jacket passed around the smoke pipe. Deflection plates are built into this jacket (index 5), which lead the return water in a spiral around the smoke pipe. After heating up the return water leaves the heat exchanger on the opposite side of the inlet and goes from there (index 4) to 11111 boiler0 The heat exchanger is against heat loss Provided on the outside with approx. 40 mm thick thermal insulation.

To avoid corrosion, the heat exchanger is made of stainless steel.

Further refinement: In order to also have a The heat exchanger is used to ensure optimal utilization of the thermal energy in the flue pipe additionally provided with a commercially available smoke gas cap.

This is closed during the burner shutdown. When inserting the burner pre-purge via contact from the boiler thetsostat opens the flap, When the burner has finished, the flap closes automatically. for better The heat exchanger will send out cleaning at the entrance and exit with a slider each (Index 7) provided, Achievable Advantages: The one through the invention achievable advantages consist of: - the use of the otherwise lost Exhaust heat.

- the installation of smaller boilers in the heating system the great percentage of poor recovery.

- the shortening of the burner running times through heated return water.

- the reduced power consumption due to the shortened Brehner running times.

- the considerable savings in heating energy through shortened Drenner running times.

- the reduction in exhaust gas temperatures that are too high due to heat loss when heating the return water.

- the improvement of the CO2 value due to the lower exhaust gas temperature when leaving the heat exchanger.

Exemplary embodiment: An exemplary embodiment of the invention is on Drawing no. I.009.EB-PR.78, Fig. 1, shown.

L e r s e i t e

Claims (1)

Patent claims Main claim: Device or device for the recovery of excess or lost exhaust gas heat energy characterized by: installation of a High-performance heat exchanger instead of the previous I-tube. Subclaims: 2.) other structural designs of the heat exchanger, such as. Lamellar, plate, tube heat exchangers and all other designs. o.) Device version with / without automatic or manual flue gas flap.