RU1815504C - Dust concentrator - Google Patents

Abstract

Use: in thermal power plants. SUMMARY OF THE INVENTION: the transverse baffle 4 of the dust concentrator is made in the form of a diffuser, the chipper 14 consists of two cones 15 and 18, aligned with the bases at the junction, in the cone 15 there are holes 16 communicating with the hollow rod 17, which is mounted for vertical movement along the discharge pipe 11 This allows you to increase efficiency. 2 ill.

Description

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The invention relates to the preparation of fuel for combustion and can be used in thermal power plants in dust preparation systems.

The purpose of the invention is to increase profitability.

Figure 1 schematically shows a dust concentrator, a longitudinal section; Fig.2. is a longitudinal section of a dust concentrator chipper.

The dust concentrator contains a vertical cylindrical housing 1, divided into upper and lower sections 2 and 3 by a transverse partition 4. Communicating with each other bypass pipes 5 and 6, while the lower section 3 is provided with an axial inlet pipe 7, introduced inside the section 3, tangential pipes 8 and 9 the coolant inlet located in the upper part of section 3 and the tangential pipe 10 for discharge of the concentrated mixture located in its lower part, and the upper section 2 is equipped with an axial discharge pipe 11, tangential to the pat holes 12 and 13 of the outlet of the concentrated mixture and the chipper 14, consisting of two cones, aligned with the bases, in the junction of which in the smaller cone 15, facing the apex down, holes 16 are made, communicating with the hollow rod 17 attached to the upper cone 18, installed with the possibility of vertical movement along the axis of the discharge pipe 11, connected to the pipe 9 for entering the coolant of the lower section 3 bypass pipe 19 through an additional dust concentrator 20 with a dust pipe 21 of the latter. The transverse partition 4 is made in the form of a diffuser, the inlet pipe 7 is inserted inside the bypass pipe 5 with the formation of an annular gap 22. A slide 23 is installed on the pipe 13 of the concentrated mixture discharge of the upper section 2, and a mill can be installed between the discharge pipe 11 and the additional dust concentrator 20 fan torch 24,

The dust concentrator is made of heat-resistant steel.

The dust concentrator operates as follows. -:,;

The aerosol mixture from the grinding device enters the inlet 7. In the gap 22, an ejection effect is created, which sucks the flue gases into the nozzles 8 and 9. When the aerosol with the fumes and gases passes through the bypass pipe 5 into section 2, dust freezes due to the larger diameter of the upper section 2 compared to inlet 7. As a result

hovering, part of the dust returns to the baffle 4 and is drawn into recirculation inside section 2, and part of the finer dust through the nozzle 13 of the concentrated mixture discharge enters the lower section 3 through the bypass pipe b. The amount of flowing dust is regulated by the gate 23. Another part of the fine dust enters through the Branch pipe 12 of the concentrated drainage

0 mixture to the burner of the furnace, To prevent dust from entering the discharge pipe 11, a chimney 14 is installed in front of it, through the openings 16 of which gas or steam enters, blowing off the dust from the entrance to the discharge pipe

5 11. When moving the rod 17 through which the gas is supplied, the passage section of the inlet to the waste pipe changes, which controls the degree of dust degassing in section 2. Using the cones 15 and 18 of the chipper 14, the dust

0 at the entrance to the discharge pipe 11 rotates 180. and recirculates in the section, Part of the dust that has leaked into the discharge pipe 11 with the help of an additional dust concentrator 20 is collected and sent through

5 bypass pipe 19 to the lower section 3 through the pipe 9 for entering the coolant.

In the lower section 3, the dust is rotated by means of tangential paths, cuttings 8 and 9 of the coolant inlet, squeezed out to the walls of the casing and flows into the nozzle of the concentrated water mixture. and gas ballast and flue gases through the gap 22 are removed into section 2 and the waste pipe 11.. In the proposed dust collector

5, the dust is treated all the way through with hot flue gases, and the processing time is increased due to its recirculation in the upper section of the dust concentrator. When the bump 14 is hit, the fuel is thermally molded and the fine dust is additionally separated in the lower section of the dust concentrator from gases and fed to the burners, and the dust entering the waste pipe is returned through an additional dust collector5 centralizer to the lower section and fed to the burners. By supplying steam to the openings 16, it is possible to increase the degree of dust conglomeration due to sticking and increase the residence time in section 2.

0 Thus, the dust concentrator allows you to increase efficiency by increasing the quality of the dust entering the combustion as a result of its milling and heat treatment, as well as increasing the concentration

Claims (1)

5 by double separation. A dust concentrator comprising a vertical-1 cylindrical housing divided into upper and lower sections by a transverse partition communicating between each other bypass pipes, while the lower section is equipped with an axial inlet pipe brought into the section, tangential coolant inlet pipes located in the upper part of the section, and a concentrated mixture outlet pipe located in its lower part, and the upper section is equipped with an axial discharge pipe, tangential branch pipes for the removal of the concentrated mixture and a chipper, characterized in that, in order to increase efficiency, the transverse partition made in the form of a diffuser, the chipper consists of two cones, aligned with the bases, at the junction of which in a smaller cone, facing the top down, holes are made communicating with a hollow rod attached to the upper cone, mounted with the possibility of vertical movement along the axis of the discharge pipe connected with the inlet of the coolant of the lower section bypass pipe through an additional dust concentrator with a dust nozzle of the latter.