DE4302175C2 - Radiation cooler of a gas generator - Google Patents

Description

The invention relates to a device for Forced cooling and gas flow from a hot, contaminated raw gas in a radiation cooler Gas generator, whose gas routing space in the lower Section of a bypass nozzle as well as one or more Has inlet connection for the coolant and a coolant bath in which the lower part immersed in a heat exchanger basket.

DE 29 51 153 A1 describes a device for cleaning of synthesis gas with an internal pressure vertical gas duct known in which the Synthesis gas leaving the reactor is cooled with one arranged at an angle to the gas duct Gas discharge line and one in the lower part of the Gas guide room arranged heat exchanger, which of is surrounded by a coolant bath.

This radiation cooler has since been used in the Form developed that in the lower part of the Radiator two gas outlet ports are arranged by which normally release the pre-cooled gases. The excreted from the unpurified flue gases Solid or slag particles fall into this lying coolant bath.

Below these two gas outlet connections was a another bypass nozzle and an additional one Heat exchanger basket arranged to at high Pollution levels the unpurified raw gas Conduct cleaning and cooling through the water bath and deducted over the bypass nozzle.  

With this mode of operation, it was found that the outside the heat exchanger basket and the tank wall contaminated raw gas passed through not fully Extent is led through the water bath, but rather flows directly to the bypass nozzle, whereby the quench effect on raw gas has been reduced.

The invention is therefore based on the object Radiation cooler of a gas generator such to further develop that for forced cooling by the Coolant bath in the tank bottom passed raw gas like this is carried out that a breakthrough of the raw gas stream in the short circuit between the gas space and the outlet connection avoided and the quench effect of the raw gas is improved.

The task is solved in the way it is in the claims is specified.

To break through the raw gas flow in a short circuit between the gas space and the outlet nozzle, according to the invention is a flow chicane, in the form a sieve bottom, between the heat exchanger basket and Container wall or between the heat exchanger basket and arranged around the guide funnel.

This sieve bottom with downwards or upwards Bends can be horizontal or down or be attached at an inclined shape. The sieve bottom should be as close as possible to the Apply to the wall of the guide funnel.  

Openings with different Be incorporated to the pressure drop of the diameter To influence gas flows.

The sieve bottom with downward bends is conveniently located on the lower edge of the Heat exchanger basket attached.

The sieve bottom with the bend pointing upwards comes with an annular fastener provided that on the container wall of the radiation cooler is attached.

The attachment can, for example, each with continuous welds.

An embodiment of the invention is based on schematic patent figures explained.

Show it:

Fig. 1 is a plan view of the sieve plate,

Fig. 2 shows a section of the sieve bottom with a downwardly angled portion,

Fig. 3 shows a section of the sieve bottom with upwardly angled portion,

Fig. 4 is a section through the lower part of the radiant cooler with a screen bottom with a downwardly angled portion,

Fig. 5 shows a section through the lower part of the radiation cooler with a sieve bottom with an upward bend.

Fig. 1 shows a plan view of the sieve plate ( 1 ) with the openings ( 3 , 4 , 5 ) of different sizes incorporated therein. The sieve bottom ( 1 ) is arranged around the heat exchanger basket ( 2 ). There are no openings ( 3 , 4 , 5 ) in the sieve bottom ( 1 ) in the intake area of the bypass nozzle ( 8 ) in the container wall ( 7 ). This is to prevent the gas from flowing out over the bypass connection in the shortest possible way.

Inside the heat exchanger basket ( 2 ) is the gas space ( 14 ), which is delimited by the coolant bath ( 11 ).

Fig. 2 shows a section through the sieve plate ( 1 ), in which openings ( 3 , 4 , 5 ) of different sizes can be seen. The sieve bottom ( 1 ) can be attached to the heat exchanger basket ( 2 ) in a horizontal or inclined manner.

A preferably rectangular gap sealing plate ( 20 ) can be arranged on the upper guide funnel ( 21 ), by means of which the gas is prevented from flowing upward between the guide funnel ( 15 ) and the bend of the sieve plate ( 1 ). If the distance between the guide funnel and the bend in the sieve bottom is narrow enough, the gap sealing plate can be dispensed with.

Fig. 3 shows a section through the sieve bottom ( 1 ), which is connected via an annular fastening ( 9 ) to the container wall ( 7 ) of the radiation cooler below the bypass nozzle ( 8 ).

In order to further divide the gas flow, packing elements ( 19 ) can also be stored on the sieve tray ( 1 ).

An annular space ( 17 ) is formed above the water level ( 18 ) between the container wall ( 7 ) and the heat exchanger basket ( 2 ) and acts as a gas collection space.

From Fig. 3 it can also be seen that a control device ( 16 ) is arranged in the bypass pipe ( 15 ) starting from the bypass pipe ( 8 ). In order to keep the pressure drop between the gas space ( 14 ) and the bypass line ( 15 ) within such limits that on the one hand a gas flow is formed and on the other hand the water level ( 18 ) does not rise above the lower edge of the bypass nozzle ( 8 ) or the water level ( 12 ) does not drop below the specified lower water level, the back pressure must be regulated. This is done with the help of the above-mentioned control device ( 16 ).

From FIGS. 4 and 5, the different types of attachment of the sieve bottom are (1) to detect the radiation cooler in the lower part. The lower part of the heat exchanger basket ( 2 ) and thus the sieve bottom ( 1 ) is arranged below the upper water level ( 13 ) of the coolant bath ( 11 ). The lower water level ( 12 ) should not fall below the lower edge of the heat exchanger basket ( 2 ) in the operating state.

The sieve bottom ( 1 ) with the downward angled portion is attached to the lower part of the heat exchanger basket ( 2 ) and is in the operating state in the coolant bath ( 11 ) near the upper water level ( 13 ).

The sieve bottom ( 1 ) is also in the coolant bath ( 11 ) in the operating state, but the fastening ring ( 9 ) is fastened above the upper water level ( 13 ) to the container wall ( 7 ) of the radiation cooler.

Guide funnels ( 21 ) below the gas space ( 14 ) serve to discharge the separated solids or slag particles into the slag receiving device, not shown.

References list

1

sieve tray

1

a Sieve plate with angled downwards

1

b Sieve plate with angled upwards

2

heat exchange basket

3-5

Openings in the sieve bottom

6

Sieve bottom area without openings

7

Radiant cooler tank wall

8th

Bypass pipe

7

Radiant cooler tank wall

8th

Bypass pipe

9

Ring-shaped attachment of (

1

)

10

Inlet connector for coolant

11

Coolant bath / water

12

Lower coolant level / water level

13

Upper coolant level / water level

14

headspace

15

Bypass line

16

control device

17

Annulus as a gas collecting space

18

Cooling liquid level / water level

19

packing

20

Gap seal plate

21

redistributors

Claims (8)

1.Device for forced cooling and for guiding a hot, contaminated raw gas in the radiation cooler of a gas generator, the gas guiding space in the lower section of which has a bypass connection and one or more inlet connections for the coolant and, underneath, receives a coolant bath into which the lower part of a heat exchanger basket is immersed , characterized in that a circumferential, horizontal or inclined sieve plate ( 1 ) with openings ( 3 , 4 , 5 ) is arranged at the level of the lower edge of the heat exchanger basket ( 2 ) and that the sieve plate ( 1 ) is external, downwards or downwards bends directed above ( 1 a) or ( 1 b). 2. Device according to claim 1, characterized in that the sieve bottom ( 1 ) with downward bend ( 1 a) on the lower edge of the heat exchanger basket ( 2 ) is attached. 3. Apparatus according to claim 1, characterized in that the sieve bottom ( 1 ) with an upward bend ( 1 b) is provided with an annular fastening element ( 9 ) which is fixed to the container wall ( 7 ) of the radiation cooler. 4. Device according to claims 1 to 3, characterized in that the sieve bottom ( 1 ) in the feed area ( 6 ) of the bypass nozzle ( 8 ) has no openings ( 3 , 4 , 5 ). 5. Device according to claims 1 to 4, characterized in that the openings in the sieve plate ( 1 ) have differently large diameters ( 3 , 4 , 5 ). 6. The device according to at least one of claims 1 to 5, characterized in that on the sieve plate ( 1 ) packing ( 19 ) are arranged. 7. The device according to at least one of claims 1 to 6, characterized in that the annular space ( 17 ) above the water level ( 18 ) is designed as a gas collecting space. 8. The device according to at least one of claims 1 to 7, characterized in that a control device ( 16 ) is arranged behind the bypass nozzle ( 8 ) in the downstream bypass line ( 15 ).