RU137788U1 - CYCLONE - HEAT RECOVERY - Google Patents

Abstract

A cyclone heat recovery unit containing a cyclone located on top of a tangential pipe for air inlet, an internal exhaust pipe, characterized in that the cyclone consists of a cylindrical and conical parts, while the cylindrical part of the cyclone has screw-shaped ribs on the outside and is enclosed in a coaxially arranged cylindrical body with a lower a tangential nozzle for water inlet and an upper nozzle for water outlet, and a spinning snail is planted on the inner exhaust pipe.

Description

The utility model relates to devices for dust collection, gas purification, as well as concomitant utilization of the heat of purified gases and can be used in various industries, for example, building materials, engineering, chemical, etc.

A known method of purification of exhaust gases from thermal ore furnaces and installation for its implementation (application RU No. 2007140601, F27B 3/10, published May 10, 2009), which consists in the fact that the exhaust gases undergo a two-stage - coarse and fine dust removal first in cyclones, then in metal-cloth filters, gas cooling is carried out by suction of atmospheric air.

Known heat recovery (patent RU No. 2323384, F22B 1/18, published 04/27/2008). The invention relates to the field of energy conservation and can be used for heat recovery and wet cleaning of flue gases. The heat exchanger includes a contact heat exchanger, a droplet eliminator, a gas-gas heat exchanger along the circulating water, a water-water heat exchanger and a water-air heat exchanger are arranged in series.

The closest technical solution is (patent for invention RU No. 2339436, B01D 47/06, published November 27, 2008) a multifunctional apparatus comprising two stages of gas treatment: the first stage of the apparatus includes upper and lower inlet nozzles equipped with tangential twists and tangential nozzles . The second stage includes a centrifugal mixing chamber with an inlet nozzle equipped with a tangential twist, a diffuser, a confuser, a spinner and an outlet nozzle.

The disadvantage of this installation is the complexity and metal consumption of the structure, due to the presence of two stages of processing, the use of spinners, the need for a water treatment system for circulating sprayed water, which receives heat from the gas being treated and does not use it in the future.

The objective of the utility model is the combination in one apparatus of cleaning a heated dust and gas stream and utilizing its heat;

- increasing the efficiency of air purification due to the use of the phenomenon of thermophoresis, arising from the presence of water-cooled walls of the cyclone body;

- improving the sanitary-hygienic and technological reliability of the apparatus due to non-contact removal of the heat of the gas being cleaned by heated water and increasing its quality.

The essence of the utility model lies in the fact that the cyclone heat exchanger containing a cyclone, consisting of a cylindrical and conical part located on top of the tangential pipe for air inlet, an internal exhaust pipe with a screw snail mounted on it, while the cylindrical part of the cyclone has screw-shaped ribs on the outside and it is enclosed in a cylindrical housing coaxially located at a certain distance with a lower tangential nozzle for water inlet and an upper nozzle for water outlet.

The technical result of the use of the invention lies in the fact that the presence of an outer cylindrical body mounted on the cylindrical part of the cyclone with screw-shaped ribs fixed on it allows combining in one apparatus the functions of cleaning a heated gas and dust stream and utilizing its heat to heat water circulating in the volume in the cavity between the wall of the cylindrical part of the cyclone and the wall of the outer cylindrical body of the apparatus. The presence of ribs and their location contributes to the directed movement of water from the bottom up, providing a counterflow of water and gas and dust flow and increases the heat transfer surface. The counterflow allows you to maintain a constant temperature difference between water and gas, providing maximum efficiency. In this case, the cyclone wall is cooled, increasing the efficiency of gas purification due to the occurring phenomenon of thermophoresis. Non-contact removal of heat by water ensures its quality and increases the sanitary-hygienic and technological reliability of the apparatus.

The essence of the utility model is illustrated in the drawing.

The recovery cyclone comprises an inner part in the form of a cyclone 1, consisting of a cylindrical and conical part, an outer cylindrical body 2 located coaxially with the cylindrical part of the cyclone body, on which ribs 3 are screw-mounted on the outside. The outer case has a tangentially fixed inlet pipe 4 at the bottom, at the top - outlet pipe 5. Cyclone 1 contains in the upper part a tangential inlet pipe 6 and an internal exhaust pipe 7 with a spinning scroll 8.

The cyclone heat exchanger operates as follows.

The cleaned heated dust and gas stream through the inlet pipe 6 enters the cyclone body 1, after which it is discharged out through the exhaust pipe 7 with a spinning snail 8. Cold water enters the cavity between the cylindrical part of the cyclone body 1 and the outer case 2 located at a certain distance apart from each other. Water through the lower inlet pipe 4 rises up, washing the ribs 3, screw-fixed outside the cylindrical part of cyclone 1. At the same time, the water is heated due to the heat of the injected dust and gas stream while cooling the wall of the cylindrical part of cyclone 1, which causes the occurrence of thermophoresis, intensifying the separation of solid particles from cleaned dust and gas stream. Heated water, removed through the upper pipe 5, due to its high quality due to the lack of direct contact with the heating medium, can be used for hot water supply, heating and others.

Claims (1)

A cyclone heat recovery unit containing a cyclone located on top of a tangential pipe for air inlet, an internal exhaust pipe, characterized in that the cyclone consists of a cylindrical and conical parts, while the cylindrical part of the cyclone has screw-shaped ribs on the outside and is enclosed in a coaxially arranged cylindrical body with a lower a tangential nozzle for water inlet and an upper nozzle for water outlet, and a spinning snail is planted on the inner exhaust pipe.

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