DE29504137U1 - Device for the treatment of cycle gas of a cycle diesel plant - Google Patents

Description

Device for the treatment of cycle gas from a circulating diesel system

The invention relates to a device for processing the circulating gas of a circulating diesel system, preferably in watercraft, comprising a housing with gas inlet and outlet, deflection parts for the circulating gas inside the housing, a collecting container for water and a water outlet on the housing.

The device described above is used in technology, as a separator in the processing of the circulating gas.

In the case of cycle diesel engines, the cycle gas at the engine inlet must not only be dry, but also low in soot, in order to achieve the required service life. In cycle diesel systems, the exhaust gas is mixed with sea water in an absorber so that carbon dioxide, which is produced during combustion in the engine, can be washed out of the cycle gas. The cleaned cycle gas then leaves the absorber with a relatively high water content. In order to reduce the water content,

In a downstream separator of the type mentioned above, the circulating gas is diverted and water is separated in the form of water droplets. The separator also serves to protect the engine from water overflowing from the absorber. If too much water gets into the separator, quick-closing flaps in the circulating gas system are activated to protect the engine. Depending on the reaction time of the flaps, the separator must be able to absorb a sufficient amount of water.

In a mesh filter downstream of the separator, soot is filtered out of the circulating gas in state-of-the-art circulation systems. The soot consists of small particles that combine to form a sticky mass in a moist environment. Filters already used in practice therefore had to be dismantled and cleaned every 50 to 60 hours of operation, for example.

What is needed is a device of the type mentioned above, which should also fulfil the following tasks and conditions:

Tasks :

1. Be able to dry circulating gas, separate water and drain water from the system.

2. Prevent water hammer in the diesel engine by overflowing the absorber and create a reservoir for overflowing water.

3. Filter out soot from the cycle gas. Boundary conditions :

1. The filter should not need to be removed during a mission (approx. 350 operating hours).

2. The gas flow resistance must not be too high.

3. The treated cycle gas must be so clean that it does not contaminate the diesel engine.

This is achieved by a device having the features specified in the claims.

The main advantage of the invention is that the functions of a separator and a soot filter can be carried out in a single housing and long operating times can be achieved. If signs of contamination appear on the filter, the filter can be cleaned during operation.

The invention is explained below by way of example with reference to the drawing.

The only figure of the drawing shows a cross-sectional view through a device according to the invention.

In the figure, 10 is an essentially cylindrical housing, into which circulating gas enriched with water and soot is introduced at 11. The gas performs a rotational movement inside the housing and finally reaches deflecting or diverting parts in the lower part of the housing, which are generally provided with the reference number 13. The circulating gas is deflected there essentially by 180°,

During this process, water passes downwards through the perforated plate 13 and can be drained away via a water outlet 15.

The circulating gas then enters the interior of a filter 20, which is a cylindrical mesh filter insert that can be rotated by hand about its axis in the upper part at 21 on the housing 10. This is indicated schematically by the parts designated 22.

The recycle gas having passed through the filter leaves the device according to the invention at 12.

If the filter insert 20 is to be cleaned, water under high pressure is introduced via a cleaning water inlet 23 and, as shown schematically, sprayed onto the filter insert 20 from the outside via nozzles. Inside the filter insert 20 there is a baffle plate 24 and brushes, both of which are arranged in a fixed position. If the filter insert is set in rotation via the parts 22 during this cleaning process, soot can be cleaned off the filter and removed via the water outlet 15.

If excessive water enters the absorber, a water level sensor 25 is activated. The volume above this sensor is selected so that no water can enter the circulating gas system through 12 before the emergency shut-off valves are closed.

Claims (3)

Protection claims 1. Device for processing the circulating gas of a circulating diesel system, preferably in watercraft, comprising a housing with gas inlet and outlet, deflection parts for the circulating gas inside the housing, a collecting container for water and a water outlet on the housing, characterized by a mesh filter insert (20) in the form of a cylinder arranged behind the deflection parts (13) of the circulating gas in the housing (10) in terms of flow and by an externally actuable Filter cleaning device (22, 23, 24). 2. Device according to claim 1, characterized in that the filter cleaning device is formed from a water spray device (23) arranged radially outside the mesh filter insert (20) and a baffle plate (24) with cleaning brushes arranged radially inside the mesh filter insert (20). 3. Device according to one of claims 1 or 2, characterized in that the mesh filter insert (20) is rotatably mounted and can be rotated about its axis during the cleaning process, preferably by hand.