FIELD OF INVENTION
This invention relates to a clinker breaker device for high temperature fluidized bed gasification system.
BACKGROUND OF THE INVENTION
Gasification of coal is adopted to generate electricity through integrated gasification and combined cycle using various grades of coals.
During the gasification process, mixture of air and steam is admitted from the bottom of the gasifier, coal with the bed material, is uniformly fluidized with adequate fluidization velocity with the help of air nozzles. By the chemical reaction, coal gas is formed with specific chemical composition. The distributor helps to fluidize the bed and to mix the coal rapidly and thoroughly.
During the gasification process, for a particular load, to maintain the bed height/inventory, the bed ash is extracted from the bottom of the gasifier. Maintaining the bed height is vital because it greatly influences the fluidization velocity, better fluidization, better composition of fuel gas having adequate quantity, and reduction in the over loading of equipment in the down stream of gas path with fly ash.
In a pressurized fluidized bed gasifier, the bed ash is removed by using a plurality of rotary bucket type extractors through ash coolers; and a non-mechanical type bed ash removing system generally called bed ash diverter and ash cooler. Both the systems remove the bed ash from the gasifier and thereby maintain the bed height. Problems are encountered owing to failure of bottom ash falling from the gasifier due to formation of agglomerates/clinkers and blocking the passage which, results in increase in the bed height/ inventory

inside the gasifier. For removing the bigger size clinkers from the gasifier there is no mechanism in the prior art systems. Thus the clinkers are required to be manually removed by opening the man hole of the gasifier, after each and every operation which poses various production constraints leading to higher cost and time.
Thus, an object of tb,e invention is to provide a clinker breaker device for high temperature fluidized bed gasification system which eliminates the disadvantages of the prior art.
Another object of the invention is to provide a clinker breaker device for high temperature fluidized bed gasification system which breaks the agglomerates/clinkers formed and collected at the bottom passage of a conical distributor of, the gasifier to allow a better extraction of bottom ash.
i A further object of the invention is to provide a clinker breaker device
for high temperature fluidized bed gasification system which minimizes
the formation of agglomerates near the bottom passage of the conical
distributor to ensure optimum maintenance of bed height/inventory
inside the gasifier.
SUMMARY OF THE INVENTION
i Accordingly, there is provided a clinker breaker device for high
temperature fluidized bed gastification system, characterized in that; at
least one water cooled hammer rotatably disposed at a bottom center of
a conical distributor of a gasifier, to break .the agglomerates/clinkers
formed at the bottom passage during gasification process, a cooling
water inlet pipe also acting as a shaft for cooling the hammer, one end
of which is rigidly connected to the hammer and the other end is
welded with the shaft" of a coupling; a water cooled first support means
for supporting the shaft (inlet pipe) rigidly fixed in an air plenum of the
gasifier; a first gland housing means comprises; an annular ring having
a plurality of holes for air/nitrogen purging, a plurality of graphited
ropes packed on 'both sides of the annular ring tightened with the third
flange and a second bush also fixed on the third flange for smooth
running of the shaft lis to arrest leakage of air/air-stream mixture from
an air plenum of the gasifier to atmosphere; a second support means
having one end secured to the air plenum, of the gasifier and the other

end to a fourth flange and a fifth flange connected to the fourth flange by bolts and nuts, a second gland housing means comprises; two annular rings having a plurality of holes one for the cooling water to enter into the shaft and another one to let-out-hot water through a nipple, a plurality of graphited ropes packed on either sides of both the annular rings tightened with the sixth flanges on both ends of the gland housing is to arrest the leakage of water from either side of annular lings, Two number of small tubes means welded with the shaft (water inlet pipe) and outlet pipes ensure the desired water circuit, a drive means coupled to shaft (water inlet pipe) via a solid shaft welded therewith, thereby rotating the shaft (water Inlet pipe) with the switching of the drive means which in turn imparts a rotating motion to the hammer enabling the hammer to break the agglomerates present in the bottom of the conical distributor of the gasifier.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
Fig. 1 - A schematic block diagram of a clinker breaker device according to an embodiment of the present invention.
Fig. 2 - A front view of a clinker breaker device in a conical distributor of agasifier according to the present invention.
I
Fig. 3 - A detailed blpck diagram of a clinker breaker device according to the present invention.
DETAILED DESCRIPTION OF A PREFERED EMBODIMENT OF THE
INVENTION

The Clinker Breaker device for high temperature fluidized bed gasification system consists of, a water cooled hammer (01) rotatably disposed at a bottom (throat) center of conical distributor (21) of a gasifier (23) to crush the agglomerates formed at the bottom passage of the conical distributor (21); a cooling water inlet pipe (02), also acting as a shaft, welded with the hammer (01); a hot water outlet pipe (03), having its one end welded with the hammer (01); the cooling water when admitted through the inlet pipe (02) reaches the hammer (01), absorbs the heat; turns into hot water and goes to a cooling tank (not shown)

through the outlet pipe (03). The Clinker Breaker device further comprises, a first support system (04) interposed in an air plenum (22) of the gassifier (23) to support the shaft (02) comprising; a second cooling water inlet pipe (4a), its one end welded with a first flange (4g) and the other end welded with a small pipe (4d) having a number of holes for cooling water inlet and hot water outlet, a second hot water outlet pipe (4b) its one end welded with a first flange (4g) and the other end welded with a small pipe (4d), a metallic first bush (4c) to ensure smooth rotation of shaft (02), two end plates (4e) welded with the small pipe (4d) and first bush (4c) to form a cooling water jacket, a washer (4f) having number of holes for uniform distribution of hot water is welded in the second hot water outlet pipe (4b), a dummy washer (4h) welded with the second hot water outlet pipe (4b) makes the desired hot water outlet circuit, a third hot water outlet pipe (4i) its one end welded with the second hot water outlet pipe (4b) and the other end welded with a second flange (4j), is capable of rigidly supporting and ensuring smooth rotation of the shaft (02), it also provides desired cooling water inlet and outlet circuits, and a first gland housing (05). The first gland housing (05) consist of a first annular ring (06) having a number of holes for air/nitrogen purging and a plurality of first graphite ropes (07) packed on both sides of the first ring (06), atleast one third flange (08), and a second bush (09) being fixed on said third flange (08) for smooth rotation of the shaft. The purging gas and the first gland housing (05) arrest the leakage of air or air steam mixture from the air plenum (22).
The Clinker Breaker device has a second support system (10), with its one end welded on to the air plenum (22) and the other end to a fourth flange (11), a fifth flange (12) connects the fourth flange (11).
The clinker Breaker device has a second gland housing (13) consisting of, two second annular rings (14 and 15) having a number of holes, atleast one for the cooling water inlet (02) and atleast another for the hot water outlet (03), a plurality of second graphited ropes (16) packed on both sides of the second annular rings (14, 15), atleast two sixth flanges (17) on both qnds of the second gland housing (13) for arresting the leakage of water from either side of the second annular rings (14,

15). Two number of small tubes (18) welded with the water inlet and outlet pipes (02, 03) to establish the desired water circuit. A solid shaft (19), welded with the water inlet pipe (02) connects an electric motor (24) through a coupling (20).
When the motor (24) is switched on, the solid shaft (19) rotates with a specified speed and the hammer (01) starts breaking the agglomerates if any present in the distributor bottom of the gasifier, allows the bottom ash extraction and maintains the bed height/inventory.

WE CLAIM
1. A clinker breaker device for high temperature fluidized bed gastification system, characterized in that;
• at least one water cooled hammer (01) rotatably disposed at a bottom center of a conical distributor (21) of a gasifier (23), to break the agglomerates/clinkers formed at the bottom passage during gasification process, a cooling water inlet pipe (02) also acting as a shaft for cooling the hammer, one end of which is rigidly connected to the hammer (01) and the other end is welded with the shaft of a coupling (20);
• a water cooled first support means (04) for supporting the shaft (inlet pipe) (02) rigidly fixed in an air plenum (22) of the gasifier (23);
• a first gland housing means (05) comprises; an annular ring (06) having a plurality of holes for air/nitrogen purging, a plurality of graphited ropes (07) packed on both sides of the annular ring (06) tightened with the third flange (08) and a second bush (09) also fixed on the third flange (08) for smooth running of the- shaft (02) is to arrest leakage of air/air-stream mixture from an air plenum (22) of the gasifier (23) to atmosphere;
• a second support means (10) having one end secured to the air plenum (22), of the gasifier (23) and the other end to a fourth flange (11) and a fifth flange (12) connected to the fourth flange (11) by bolts and nuts,
• a second gland housing means (13) comprises; two annular rings (148515) having a plurality of holes one for the cooling water to enter into the shaft (02) and another one to let-out hot water through a nipple (13b), a plurality of graphited ropes (16) packed on either sides of both the annular rings (148B 15) tightened with the sixth flanges (17) on both ends of the gland housing is to arrest the .leakage of water from either side of annular lings (148s 15),

• two number of small tubes means (18) welded with the shaft (water inlet pipe) and outlet pipes (02&03) ensure the desired water circuit,
• a drive means (20) coupled to shaft (water inlet pipe) (02) via a solid shaft (19) welded therewith, thereby rotating the shaft (waiter Inlet pipe) (02) with the switching of the drive means (20) which in turn imparts a rotating motion to the hammer (01) enabling the hammer (01) to break the agglomerates present in the bottom of the conical distributor (21) of the gasifier (23):
2. The device as claimed in claim 1, wherein the hot water outlet pipe
(03) is connected at other end to a cooling tank (not shown in Fig).
3. The device as claimed in claim 1, wherein the first support means
(04) comprises a first gland housing (05).
4. The device as claimed in claim 1, wherein the second support means
(10) comprises a second gland housing (13).
5. The device as claimed in claims 1 or 3, wherein the first gland housing (05) comprises a first annular ring (06) having a plurality of holes for air/nitrogen plugging; a plurality of first graphite ropes (07) packed on both sides of the first annular ring (06) to arrest the leakage air/air-steam mixture from an air plenum (22) of the gasifier (23) to atmosphere.
6. The device as claimed in claim 1, wherein the first support means
(05) additionally comprises; an inlet nipple (5a) for air/nitrogen
purging, atleast one third flange (08), and a second bush (09) being
fixed on the third flange (08) for smooth rotation of the shaft (water
inlet pipe (02).
7. The device as claimed in claims 1 or 4, wherein the second gland
housing (13) comprises atleast two second annular rings (14 and 15)
having several hples for input of cooling water and outlet of hot
water; a plurality of second graphited ropes (16) packed on both
sides of the second annular rings (14 and 15), and atleast two sixth
flanges (17) to arrest leakage of water through the second annular
rings (14 and 15).

8. The device as claimed in claim 1, wherein two tubes (18) one each welded with the shaft (inlet pipe) (02) and the outlet pipe (03) are provided to establish a closed water circuit within the device.
9. The device as claimed in claim 1, wherein a water cooled first support system means (04), rigidly fixed in theair plenum (22) of the gasifier (23) comprise; a second cooling water inlet pipe (4a), a second hot water outlet pipe (4b), a first bush (4c), a small pipe (4d), two end plates (4e) and a washer (4f) having number of holes for uniform distribution of hot water, a first flange (4g), a dummy washer(4h), a third hot water outlet pipe (4i) and a second flange (4j), is capable of rigidly supporting and ensuring smooth rotation of the shaft (02), it also provides desired cooling water inlet and hot water outlet circuits.
10. A clinker breaker device for high temperature fluidized bed
gasification system as substantially herein described and illustrated
with the accompanying drawings.