CS249411B1 - Cilinders cooler especially for cinders removed from fluidization fireplace - Google Patents

Description

BACKGROUND OF THE INVENTION The invention relates to an ash cooler, in particular for cooling ash removed from a fluidized bed, comprising a shaft with built-in cooling pipes which can be connected to the water circuit in the boiler and to provide such an assembly The slag coming into the cooler ensures a smooth passage of ash through the cooling tubes and the simplest possible design of the cooler.

According to the description the Czechoslovak author's certificate no. 219993 discloses a vertical cooling ash CHT ^· s ^and d of CHL ^{and Ic} is ^also tvoCna St. ^L YM ^and trumpets and shoulder ^HAC and ^to ter ^s are welded into the membrane walls. The pipes are led out of the upper and lower collecting chambers, into which also the central vertical water pipes, on which the blades for the ash flow change, are fixed.

In order to prevent the ash cooler from clogging the sintered pieces of slag, the central vertical pipes can only be installed at large pitches, ie the additional cooling surface inside the shaft has only a small surface. The change of direction due to the blades is not great and does not happen over the entire cross-section of the cooler, so the efficiency of the ash cooler is relatively low ·

Said disadvantages are removed largely ash coolers of the described invention, its ^{Z p} o ^{d T} ATA ^{p a n} lies in the fact that two ^P ro ^til EHL ^{E t} en ^y cools are comprised ^of en ^y and ^l es ^p o ^least once vs ^t u ^p n ^{i K} Omori at ^least one outlet ^{I to} Omori, ^kt ER ^{E p} ro ^p Ojén volume C ^hl ad ⁱ c ^s dh pipe shaft is inclined to the side of the inlet chamber, the bundle of cooling tubes is a cooled sieve tube with a gap between the tubes smaller than between the tubes of the coolant tube and with an inclination greater than the ash angle, with an ash inlet opening above the highest point of the sieve tube and an intervention opening above the lowest point ·

To allow larger pieces of sintered slag to flow smoothly, a vertical collecting shaft is attached to the lowest point of the sieve tube. Another advantage is that the walls of the vertical collecting shaft are provided with a cooling jacket and the bottom is provided with a hopper and a closure · The last advantage is that the inlet opening in the upper cover of the shaft is provided with a closure ·

The main advantage of the ash cooler is the possibility of sorting out larger pieces of sintered slag which are trapped on the sieve tube and slide on it and can be broken or removed outside the cooler after opening the intervention opening.

Since larger pieces cannot continue to travel through the radiator, the coolant tube bundles can be spaced closer together without clogging the radiator · The ash is agitated vigorously to increase heat transfer and overall efficiency · Because the coolant bundle occupies less space, yyjdpu overall dimensions of the cooler smaller and this has a significant effect on the layout of the boiler and boiler room ·

If a vertical collecting shaft is attached to the lowest point of the tubular grid, there is no need for manual intervention and hence opening the intervention opening. • Larger pieces slide down the sieve tube and fall into the vertical collecting shaft. ·

If the vertical wall of the collecting shafts cooled, the larger pieces of slag after a long delay in her coldly ^s and not ^{even under tting s} dn sweating ^at al ^{width d} rus ^will disconnect power ^{P ò í} m EDGINGPROFILE device.

Closure ^e in ^{p u} him opening of the upper · Cr ^y tu SAC ^HTY umožinuje ^p its closed ^beta Rovai ^d ive out of five ^manually it hits the cooler open intervention opening, controlling the volume of the cooling tubes at a reduced ash level, discharges vertical collection pits and similar tasks·

An exemplary embodiment of an ash cooler according to the invention will be described below and shown in FIGS. 1 and 2, wherein FIG. 1 is a vertical section through an ash cooler intended to manually break or remove larger pieces of sintered slag, and FIG. but with vertical collecting shaft ·

24941!

The ash cooler 1 consists of a box-type inlet chamber 2 and an outlet chamber 1 of the same design. The two parallel opposing chambers 2, 4 are interconnected by a bundle of cooling tubes 2. At the bottom of the inlet chamber 2 a cooling water inlet 15 is welded. outlet chambers 54 for cooling water outlet. The side walls 4 of the cooler 1, consisting of uncooled steel sheets, together with the upper cover 2 and the hopper 6 of the shaft 4 of the cooler 1 form ash.

A screening tube 10 is formed above the bundle of cooling tubes 4. The ends of its tubes are connected to the inlet chamber 2 and the outlet chamber 4. The gaps between the tubes of the sieve tube 10 are smaller than the gaps between the cooling tubes. The slanting of the sifting tube grate is greater than that of the cooled ash. For better water circulation in the cooling tubes, the entire ash cooler shaft 2 is inclined to the right, to the side of the inlet chamber 2.

An ash inlet aperture 60 is provided in the upper housing 2 of the shaft above the highest point of the tubular sieve screen 60, below which the slide shutter 60 is positioned, and above the lowest point the opening aperture 60 is open.

The chilled ash hopper 8 has an ash outlet aperture 60 at the bottom, which is connected to a cold ash discharge conduit with a cellular feeder not shown in the figure. Side walls chiladiče £ £ ^p by ^p ela ^{MPLEMENTATION} of ODN ^l Mate ^Hoo NYCHA ^p LEC extinguish ^p and ^{d at} pH Nou repair.

The ash cooler (2) of FIG. 2 is essentially the same as the ash cooler (FIG. 1) shown in FIG. 1. It differs from it in that a vertical collecting shaft (24) terminates at the bottom of the sieving screen (20), terminated at the bottom. 2 larger pieces of baked cinder and £ £ cap. The walls of the vertical collecting shaft 24 are provided with a cooling jacket 24 at the bottom of which there is a cooling water inlet 22 and a nozzle 23 at the top. for cooling water outlet.

In the steady-state operation of the ash cooler 6 according to the invention, its shaft 2 is completely or partially filled with ash. The ash exiting the fluidized bed reactor is fed through the inlet orifice up to the sieve tube. The fine ash fraction falls between the tubes and flows down between the tubes 6 of the bundle 6, mixing vigorously and cooling the cold surface of the tubes 6.

The ash height control in the shaft is performed at the rate of rotation of the cell feeder below the ash outlet aperture. Larger pieces of clinkers do not pass the screening gaps between the tubes and the tube grid 10 in that these are inclined at a larger angle than the angle of repose after ^p ela, shrom žduj ^{and I, the} select Latest ^Iz W ^{L Ca} St ^I at the ^D end ^E M tru№ov ^Riz e £ 0. ° ^dt u ^d is a ^{b L} UHA device after ultrasound ^and boiling of ^the closure £ 2 ^OPeNING of ^A are ^H ew ^h o of the aperture 1 ^3b limb of ^d s ^t healing ^greater than ^b for startup of smaller pieces, which then proceed further through the cooling tubes 8 of the bundle 6.

Due to the fact that the gaps between the tubes of the screening tube grating are narrower than the gaps between the cooling tubes of the bundle, blockage of the bundle cannot occur. Cooling water enters cooling tube bundle £ £ sifting tube grid ££ ££ sleeve and the heated water in the ^y stu ^p ££ U is a sleeve. ^J e r ^{is running} from ^A to ^{B is} from UD Vol štrtíto ch ^ ^L and ^{D both} the IC ^and the circuit it, but preferably may be connected to the boiler water circuit, thereby svyšuje boiler efficiency.

In the embodiment of the ash cooler 17 of FIG. 2, the larger pieces of sintered slag fall into the vertical collecting shaft 60 where they slowly cool. If a cooling jacket 21 is installed on the collecting shaft, cooling is accelerated and the heat recovered is utilized, either in the boiler system or depending on the use of heat from a separate cooling circuit. Cooling or boiler water is supplied to the cooling jacket 21 via a sleeve 22 and drained through a sleeve 21. After a large number of larger sintered pieces have cooled and accumulated, the accumulated material is discharged by opening the closure 20 at the bottom of the vertical collecting shaft 40.

Without changing the nature of the invention, the side walls 2 of the inlet chamber 2 and the outlet chamber 2 of the shaft 2 may be in the form of membrane walls. Likewise, the cooling jacket sběr of the vertical collecting shaft 12 can be designed as membrane walls whose tubes are welded into the inlet and outlet chambers.

Claims (3)

SUBJECT OF THE INVENTION 1. Cooling ash, particularly for cooling the ash discharged from the furnace, which is formed by a substantially vertical tubular shaft with integrated cooling element that may be involved in the circulation of the boiler, characterized in that the opposite walls že.dvě coolers Voren ^{t y} and ^l es ^p on Jeta vs ^t UPN ^a chamber ⁽²⁾ and alespoS once ^y s ^t UPN ^a chamber (3) which are connected to the beam (4) of the cooling tubes (9), the shaft (9) is inclined to the side entry of the chambers (2), above the cooling tube bundle (5) is provided a cooled screening tube grating with gaps between the tubes smaller than # between the tubes (5) of the cooling tube bundle (4) with a slope greater than ash angle, wherein in the upper casing (7) of the shaft (9), an ash inlet opening (11) is located above the highest point of the sieve tube (10) and an intervention opening (13) above the lowest point. The ash cooler according to claim 1, characterized in that a vertical collecting shaft (18) is connected to the lowest point of the screening tube (40). Ash cooler according to claim 2, characterized in that the walls of the vertical collecting shaft (18) are provided with a cooling jacket (21) and a hopper (19) with a closure (20) is provided at the bottom. Ash cooler according to claim 1 or 2, characterized in that the inlet opening (11) in the upper cover (7) of the shaft (9) is provided with a closure (12).