SU1681155A1 - Cyclone heat exchanger for heating powdered material in dispersed state - Google Patents

Abstract

The invention relates to a technique of baking heat exchangers for preheating raw meal in suspension and can be used in the building materials industry when firing cement clinker in rotary kilns. The purpose of the invention is to reduce the flow resistance and increase the efficiency of the heat exchanger. groups are successively interconnected in Rus by means of gas ducts 7 Submission of 1 mat caught by vortex chambers rial from upstream to downstream tier is performed on estrus 8 which is integrated in the flue downstream chamber 6 for the projection of the inlet pipe 2 downstream of the chamber by the gas stream 3 yl YO

Description

The invention relates to a technique of baking heat exchangers for preheating raw meal in a suspended state and can be used in the building materials industry when firing cement clinker in rotary kilns.

The purpose of the invention is to reduce the hydraulic resistance and increase the efficiency of the heat exchanger.

Figure 1 shows the heat exchanger, cross section; figure 2 is a view of And figure 1; on fig.Z - view B in figure 1.

A cyclone heat exchanger for heating a powdery material in a dispersed state contains cyclone vortex chambers 1 arranged in Rusa (for example, three), made spiral-shaped, i.e. spiral

At one end of the spiral chamber 1, an inlet nozzle 2 is built in, and an outlet nozzle 3 is connected at the opposite end. At the outlet nozzle 3, a slit 4 is made in the wall of the camera body 1, through which the trapped dust is discharged into the dust-collecting hopper 5 At the inlet nozzle 2 from the axis of the camera 1 is made the protrusion 6.

Vortex chambers in 1 groups (2-5 chambers) are sequentially interconnected in Rus. Separate groups of chambers 1 are located in Rusas (I, II, III) and the ducts 7 are interconnected. The supply of 1 material from the vortex chambers caught. upstream rus (for example, i) in

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the downstream (for example, II) is carried out along the chute 8. The pipe 8 is built into the gas duct of the downstream chamber behind the protrusion 6 along the gas flow in the gas duct.

The powdered material is fed into the heat exchanger through the chute 9. The gases aspirated from the furnace 10 are fed into the heat exchanger through the duct 11. The material into the furnace 10 is fed through the chute 12.

The gases leaving the heat exchanger are cleaned in the filter 13 and exhausted by the exhaust fan 14. From the filter 13, dust enters the heat exchanger through the drain 15.

Cyclone heat exchanger operates as follows.

The dust-laden gas through the nozzle 2 enters the vortex chamber 1, which is, for example, in the 111th floor. The passage is narrowing at the location of the protrusion 6, the gas gains a higher speed, while the inclined plane of the protrusion 6 drops dust particles from the central axis of chamber 1 to the periphery. In chamber 1, due to centrifugal force, dust rushes to the wall of chamber 1 and through slot 4 goes into bunker 5. Subsequently, the gas passes in the same trough sequentially connected vortex chambers 1, in which dust is deposited that has not settled in the previous chamber, as well as dust coming from the upper tier. Barely passing the last chamber 1 of the upper deck (I), the gas is cleaned in the filters 13 and exhausted by the smoke exhauster 14 to the atmosphere. The dust deposited in the vortex chambers of the upper Rus (for example, I) dust from the hopper 5 flows into the lower Rus (for example, II) of the heat exchanger. Due to the location of the chute 8 behind the protrusion 6 at the site of the narrowing of the flue duct, the passing gases create a vacuum and suck the dust from the chute 8 into the inlet 2 of the flue duct. The creation of a vacuum in the discharge 8 reduces the gas inflow into the vortex chamber 1, thereby increasing the degree of dust deposition in the vortex chamber 1, and the heating of the dispersed material in the vortex chamber improves. Thus, deposited in vortex chambers 1

the material passes down through the Rusas: from I to II Rus, from which it passes to III Rus. From the III rus, the material in heat 12 is loaded into the furnace 10. The gases aspirated from the furnace 10 are countercurrently passing up the Rus. The material in the vortex chambers 1 and in the ducts 7 is in a dispersed (suspended) state and has a developed surface, in connection with which the gas flow passing from the furnace intensively heats the dust-like particles of the material and at the same time cools.

Due to the fact that the vortex of the chamber 1 is made spiral, it has slight hydraulic resistances. At the same time, the presence of a protrusion 6 on the inlet nozzle 2 of the vortex chamber under vacuum provides a high degree of deposition of the dispersed material, which ensures high efficiency of heating the material.

In this case, the hydraulic resistance of the heat exchanger decreases 1.5-2.5 times. In addition, the height of the heat exchanger and its cost are reduced.

Claims (3)

1. A cyclone heat exchanger for heating a powdery material in a dispersed state, containing cyclone vortex chambers arranged in Rus, interconnected by ducts and chutes for feeding material, characterized in that, in order to reduce the flow resistance and increase the efficiency of the heat exchanger, the vortex chambers are screw and groups are consistently interconnected in Rus. 2. The heat exchanger according to claim 1, which includes: a protrusion is made on the inlet nozzle of the vortex chamber from the axis of the latter. 3. The heat exchanger popp. 1 and 2, which is also distinguished by the fact that the chute for feeding material from the upper bed is built into the duct of the lower chamber behind the protrusion in the course of the gas flow. Vida Figg tpu.3 Stiffs