SU709182A1 - Cyclone - Google Patents

Description

The invention relates to a technique for cleaning gas from dust and heat recovery, in particular, to high-temperature cleaning of flue gases, and can find application in metallurgists, heat and power, and other applications,

A dust cleaner is known that comprises a cylindrical body with tangential inlet nozzles placed along a helical line along the entire height of the filter element installed in the body, an axial outlet nozzle and a hopper for trapped dust 1. However, it is impossible to efficiently clean high-temperature gases in a known dust collector.

A cyclone is known, the inner surface of the casing of which is coated with coils for heat carrier 2 to increase the efficiency of cleaning high-temperature gases and utilizing heat. In addition to the working chamber of the cyclone, the pipe is for heat carrier. located along the perimeter of the outlet pipe / Dust trapped in a cyclone is discharged through a slot in the wall of the cyclone chamber, In process 2

During cleaning of flue gases from dust, their temperature decreases due to the removal of heat from the fluid circulating through the pipes. But the implementation of heat transfer surfaces of pipes located close to each other, leads to irrational use of the heat exchange surface, and also contributes to

0 fast clogging of the gap between the pipes with dust,

In order to improve the quality of cleaning and the efficiency of heat exchange pipes installed around the perimeter of the housing,

5 are provided with flat ribs / parallel to the walls of the housing, and the pipes installed around the perimeter of the outlet nozzle are equipped with flat ribs perpendicular to the axis of the cyclone, and a filter element placed coaxially outside the ribs.

Figure 1 shows the proposed cyclone, figure 2 - node 1 in figure 1,

5 in FIG. 3 — node II in FIG. 1.

Claims (2)

The cyclone consists of a heat-insulated casing 1, along the inner surface 2 of which there are pipes 3 for a heat transfer medium, equipped with flat ribs parallel to the casing walls. Tangential nozzles 4 for injecting dusty r are located along the body along a screw line. The filter element 5 is placed in the case and is supported on a cylindrical frame made of pipes 6 with flat ribs perpendicular to the axis of the cyclone. For the inlet and outlet of the heat carrier there are collectors 7.8. A branch pipe 9 is located in the upper part of the casing for removal of the cleaned gas. The filter element is attached at the bottom to the frame with the help of the bottom 10. A bunker 11 serves to collect the collected dust. The cyclone operates as follows. The dusty high-temperature gas flow enters through the tangential nozzles 4 and is evenly distributed around the circumference and height of the housing 1. When in contact with the coil tubes 3 and their flat fins, the hot gas is cooled, and as a result a negative temperature gradient towards the wall coincides in direction with the action of centrifugal forces. When a dust particle moves in an unevenly heated medium, a thermophoretic force acts on it, and a radial component of velocity appears from the center of the heated flow to the cold wall. Then, the partially cooled and dust-free gas stream, filtered through filtering element 5, cooled pipe 6, exits through pipe 9. Dust separated to the wall of the body moves together with gases in spiral recesses between the pipes and collects into the hopper 11. Movement of dust in In this case, it becomes organized and reduces its recirculation. Dust particles deposited on the filter surface are blown off by a vortex gas flow and also fall into the bunker 10. Cooling of dusty gases near the surface of the housing and the filter element ensures reliable operation of the device during cleaning of high temperature gases, and their cooling during the cleaning process, accompanied by a smaller volume, contributes to lowering the hydraulic resistance of the cyclone as a whole. Reducing the hydraulic resistance of the filter element and its supporting frame is achieved by choosing the step of winding ribbed serpentine, which should provide the living area of the sectional surface of the filter between the lines of tangency .mi flat edges pipes 1.2-1.3 times larger than the free area between the tubes of the coil. At the same time, water cooling pipes are used to fix the filtering surface. In this case, the velocity of the gases in the annular space will be lower than the filtration rate. Using the proposed design of the cyclone provides high quality cleaning (more than 99%) of high-temperature gases while simultaneously utilizing their physical heat. Claims of the invention Cyclone for cleaning and heat recovery of high-temperature dusty gases, comprising a housing with a tangential inlet and axial outlet nozzles, heat carrier pipes installed along the perimeter of the housing and an outlet nozzle in the form of a cylindrical coil, and that, in order to improve the quality of cleaning and the efficiency of heat exchange, the pipes installed along the perimeter of the case are provided with flat ribs parallel to the walls of the case, and the pipes installed along the perimeter of the outlet pipe, sleep Bzheny flat ribs perpendicular to the axis of the cyclone, and a filter element placed coaxially outside the ribs. Sources of information taken into account in the examination 1. USSR author's certificate number 578113, class B 04 C 9/00, 1976. 2. US Patent No. 2437294, cl. 55-269, 1948 (prototype). eleven FIG g II IG