DE1240211B - Procedure for discharging residues from gasification rooms under increased pressure - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. Cl .:

ClOj

German class: 24 e- 3/06

Number:

File number:

Registration date:

Display day:

1240211
K49851VIb / 24e
May 29, 1963
May 11, 1967

The invention relates to a method for discharging residues from under increased Pressurized, the gasification of solid fuels, especially the gasification of finely divided solid Fuels in suspension, rooms with oxygen. Under oxygen both is purer here Understood oxygen as well as air enriched with oxygen, with the reaction mixture also still an endothermic reacting medium, for example water vapor, can be added.

In the case of pressurized gasification, the residues occur as a result of the high temperatures in the gasifier often in the form of liquid slag. It is known that this slag is caused by an in the bottom of the Carburetor's intended slag drainage opening and to a water bath below where it is granulated before being fed to further discharge and discharge devices will.

The actual discharge can be done, for example, by means of a device below the gasification chamber arranged water-filled lock container to which a mechanical transport device is connected, which conveys the slag out of the gasification plant.

The high pressure in such a gasification plant, which can be 30 atmospheres and more, as well the explosiveness of the gas produced place great demands on functional reliability and the tightness of the discharge system or the required shut-off devices, which is the case with the aforementioned Establishment, however, cannot always be met with certainty.

The invention has therefore set itself the task of creating a method for discharging gasification residues, in which under all circumstances, also in the case of a leak in one of the shut-off devices that can never be ruled out Leakage of production gas with the serious consequences often associated with it avoided will. The invention also using a water-filled lock container is that the residues from the lock container by means of pressurized water, which is partially filled with water, is removed from the pressure vessel under gas pressure, into a downstream of the lock vessel, partially filled with water and under a lower gas pressure than the pressure vessel Buffer tanks are transferred, from which they are blocked after the buffer tank against the Lock container can be discharged by releasing the gas cushion.

Process for discharging residues
from standing under increased pressure
Gassing rooms

Applicant:

Heinrich Koppers

Company with limited liability,

Essen, Moltkestr. 29

Named as inventor:
Reinhard Waldhofer, Essen East

According to a further feature of the invention, the same thing happens before the discharge begins in the pressure vessel Pressure and the same water level as in one arranged between the carburetor and the lock tank Collection container regulated. This is

^a 5 guarantees a constant and calm water bath surface during every operating phase.

The invention is also in the event of a defect in a shut-off device, in particular on the one between Collecting container and lock container, a gas leakage made impossible that in the pressure builds up throughout the entire lock system due to the incoming water, whereby a water failure does not is possible. The method according to the invention thus offers absolute security in all operations malfunctions occurring in a gasification plant.

Another essential advantage of the method according to the invention is the easy adaptability to the requirements of the company. So it is just by choosing the differential pressure between Pressure vessel and buffer vessel possible, the discharge process, d. H. the amount of pressure equalized displaced water, exactly matched to the amount of solid matter that is generated and to be discharged. Because the pressure in the pressure vessel depends

+5 is that in the gasification chamber, so the differential pressure is varied by changes the gas pressure in the buffer tank. Both this gas cushion and the one in the pressure vessel should go out Be formed from an inert gas for safety reasons. In plants for the gasification of coal dust in suspension one will preferably use nitrogen as the inert gas, which is anyway and

709 579/176

3 4

with sufficient pressure is available. Hydraulic or electro-pneumatic via one is still noteworthy that according to the new procedure time sequence switch 51 with impulse lines to all

rensweise no inert gas losses can occur. Control and closing organs controlled. The pressure in

Further details of the carburetor according to the invention amount, for example, to 30 atmospheres, the stick

On the basis of the drawings, the three fuel and water pressures in lines 27 and 22 are shown

management forms of to carry out the procedure 36 atü. The differential pressure between pressure vessels

rens suitable facilities in simplified form 24 and buffer container 39 is chosen with 23 atü, d. H.,

represent, explained in more detail, the invention in the buffer container is under nitrogen pressure

their possible applications of course from 7 atmospheres.

is not limited to this. _T he io _from the gasifier through the slag channel

In Fig. 1, 10 is the lower part of a pressure H flowing liquid slag falls continuously

carburetor indicated, which from the slag channel into the water bath below, where they granu-

11 is interspersed. A Hert joins him downwards and in front of the closed swivel

Compensating connection 18 lined with refractory material accumulates.

Tor 12 and a double jacket 15 through which water flows. After the pressure equilibrium between Ver-13 has been regulated, the inlet and outlet of which are 14 and 15 denoting gas 10 and pressure vessel 24 and the same water network. The collecting tank 16 for the slag mirror height as in the collecting tank 16 - in this and the lock tank 17, which by the example is the pressure vessel in the above-mentioned swivel lock 18 and the ball valve 19 from one pressure ratios to ² A, filled with water - will be shut off at the other can, remain constantly operated with 2 ° of the time sequence switch 51, which is filled with water via actuator, which opens the swivel lock 18 up to the lower part of the ball valve 19 formed by 52 and then via actuator 53 compensator 12 and double jacket 13. This causes the shaft to fall. To comply with the water collecting container 16 _m i existing in the slag spiegeis 20 are a water inlet 21, the terminal lock container 17th

to the pressurized water main line 22 and the water losses occurring at 25 are now compensated for by the time sequence switch first of the deterrent of the slag by evaporation of the swivel lock 18 and the ball valve 19, and a closed again. The pivot overflow 23 then opens. Approximately the same height as the closure 35, the ball valve 37 and the ball valve of the header 16 is a pressure vessel 24 is Toggle 36 by means of their associated actuators 54, arranged 56, which has a water inlet 25 and an over- 30 _{un £} j 55 ^ further includes Actuator 57, the ball valve 58. Run 26 for partial water filling up to the same level. The slag is forced out of the sluice in the pressure vessel 24 by the water in the pressure vessel 24 which is forced up by the nitrogen level like the water level 20 in the collecting tank. The upper part of the pressure vessel is under sen container 17 pressed into the buffer container 39, compressed nitrogen, which is _{fed through line 27 through where} at the same time through line 34 and nozzle pressure reducing valve 28. The line 35 32 in the deflection bend 31 reaching pressurized water 29 with the throttle member 30 connects the pressure - here any blockages are prevented. Containers with the lock container 17. means of the built-in throttle member in the line 29

In the outlet of the downwardly tapering 30, the discharge speed of any lock container 17 can be set if a deflection bend is located. After reaching a predetermined What-31 with wear plate 32 and jet nozzle 33 through which 40 serstandes 59, which here is a third of the Behältervolu-pressure water from the branch pipe 34 for the purpose of transit _men s by weight and wherein the pressure in the pressure refraction of a in the deflection curve may The container has dropped to 15 atmospheres while the stick-forming slag plug is being injected. When the material in the buffer container 39 is compressed to half its volume between the lock container 17 and thus compressed to 14 atmospheres and the buffer container 39 connected downstream of it, the low-level probe 61 contacts the swivel lock 35 and the ball valves to _m time sequence switch 51, the ball valve 36, 36 and 37, with a flushing water swivel lock 35 and ball valve 58 closing in front of the latter, connection 38 is provided. If the ball valve 63 has to be reckoned with larger chunks of slag via the actuator 62, it is recommended, whereby pressurized water flows in, which flushes the missing sealing surface in the lock container 17 with another 50 sealing surface on the ball valve 37. Simultaneously install the slag crusher, which in the drawing opens the ball valve 65 via actuator 64 and is not shown. lets pressurized water through line 25 into the pressurized

The buffer container 39 can pass through the line 40 to the level container 24. The one on the pressure vessel

if it is partially filled with water and is standing, the provided probe 66 triggers when the value falls below the

also under nitrogen from branch line 41. Against the 55 water level 59 alarm off.

Slag discharge line 42 is the buffer tank, the water is in the buffer tank 39 except for that

blocked by the ball valve 43. Furthermore, a level 60 has risen, the maximum level probe 67 gives

Container 44 is provided, which is contacted by the overflow 23 to the timer switch and causes the

via line 45 and through line 46 pressurized water closing the ball valves 63 and 37 while

water flows in. This container is also connected to the 60 via actuator 68 the ball valve 43 opens. That

Gasification chamber through nozzle 47 and line 48 in nitrogen cushion in the buffer tank can relax

Connection, so that in it the same pressure NEN and pushes the accumulated in the lower part

as it builds up in the carburetor. After opening the valve 49 slag through line 42 through a separating screen in

can od from the container 44 through line 50 pressure a sewage treatment plant. Like. To support the

water to support the slag transport 65 slag transport can via actuator 70 the

can be taken in line 42. Ball valve 49 can be opened and additional flushing

The operation of the device according to FIG. 1 water comes out of the container 44 by line

is as follows: The entire operating sequence is electro- 50 in the line 42. This container is also with

Claims (5)

a low and high level probe 71 and 72, respectively. When the water level in the buffer tank 39 has reached level 73, the ball valve 43 is closed again by the low level probe 74 via time sequence switch 51. The discharge process is thus ended and the nitrogen pressure in the buffer container is regulated again by means of the pressure indicator 75, pressure switch 76 and valve 77 with actuator 78. When the water level in the pressure vessel 24 has reached its prescribed maximum level due to the incoming pressurized water, the probe 79 makes contact with the timer switch 51 and the ball valve 65 closes. Before the next discharge begins, the pressure between the carburetor and the pressure vessel is now equalized. This is done by means of a pressure equalization regulator 80, a three-way valve 81 with a coil 82 and a control valve 83. FIG. 2, which have the same designations as F i g. 1 is provided, represents another embodiment of a slag discharge. Here the buffer container 39 is arranged below the lock container 17, so that the deflection bend 31 according to FIG. 1 and its water rinse can be omitted. However, a dip tube 84 is provided through which the slag is fed directly into the lower part of the buffer tank and a calmed water surface is achieved. The operational sequence in this device corresponds to that shown in FIG. 1 described. F i g. Finally, FIG. 3 shows an arrangement which can be arranged in particular where there is a requirement for the lowest possible overall height. It has been shown that the solids can easily be transported upwards by means of the method according to the invention. Thus, behind the ball valve 37, an upwardly directed line 85 is provided, through which the slag according to the same mode of operation up to this point as according to FIG. 1 is pressed into the buffer container 39, which is designed here as a double container with a built-in throttle element 86. The lower part of the buffer container, which is constantly filled with water, is similar to the lock container 17 and, like this, has a deflection bend 87 with wear plate 88, jet nozzle 89 and water supply line 90, which is opened by valve 91 with actuator 92. To support the slag transport, a further container can also be switched on, which is not shown, but whose function is the same as that of the container 44 in FIG. 1. In addition to those already mentioned, the invention has a few other advantages. So the outlet side of the ball valve 19 can never be depressurized. In addition, no free spaces can be created into which gas can enter. After all, the consumption of pressurized water is comparatively low and roughly corresponds to the amount of slag discharged. Patent claims: 1. Process for discharging residues from under increased pressure, the Gasification of solid fuels, especially the gasification of finely divided solid fuels in the Float oxygen serving spaces using one below the pressure space arranged water-filled lock container, characterized in that the residues from the lock container (17) by means of pressurized water, which is a partially water-filled, is removed under gas pressure pressure vessel (24) into one of the lock container (17) downstream, partially water-filled and under a lower gas pressure than the Pressure vessel (24) standing buffer vessel (39) are transferred from which they are shut off of the buffer container against the lock container by releasing the gas cushion will. 2. The method according to claim 1, characterized gekennzeicnhet that before the beginning of the discharge in the pressure vessel (24) the same pressure and the same water level as in one between the carburetor (10) and lock container (17) arranged collecting container (16) is regulated. 3. The method according to claim 1, characterized in that the from the lock container (17) Volume to be displaced by selecting the differential pressure between the pressure vessel (24) and buffer tank (39) is set. 4. The method according to claim 1, characterized in that the discharge speed through a pressure vessel (24) and lock vessel (17) or between upper and lower part of the buffer tank (39) provided throttle member (30 or 86) is set. 5. The method according to claim 1, characterized in that as a gas cushion in the pressure vessel (24) and an inert gas, preferably nitrogen, is used in the buffer container (39). Considered publications:
Magazine "Coke and Gas", Vol. 21, Issue 236, January 1959, pp. 13-15. 1 sheet of drawings 709 579/176 5.67 Bundesdruckerei Berlin