RU33635U1 - GAS MIXING CAMERA - Google Patents

Abstract

1. A gas mixing chamber having an inlet window for receiving atmospheric air and a stream of heated gases, at least one outlet window for discharging from the chamber by discharging a working gas mixture, for example, a drying agent, and provided with an inertial spark separator and entrainment collector, characterized in that the inertial spark separator is made in the form of a louvre wall of strips, which is located behind the entrance window and at least partially overlaps the passage section of the chamber, and the louvre wall strips are installed at acute angles to the movement of incoming gases, and the ablation collector is located below the inertial spark separator. 2. The chamber according to claim 1, characterized in that the ablation collector is made in its lower part and is equipped with a discharge flap. The chamber according to claim 1 or 2, characterized in that the ablation collector is closed from above by a grid of corners located with its vertices up.

Description

GAS MIXING CAMERA

The utility model relates to heat engineering, in particular to devices for drying grain and other combustible products, and can be used mainly in the agricultural sector.

A well-known gas mixing chamber used in a grain dryer (Mechanization of post-harvest grain processing in the Novosibirsk region: Recommendations / RAAS. Sib. Branch. SibIME; Prep. Ivanov N.M., Sinitsin V.A., Klimok A.I. and others. Novosibirsk, 2002 - p. 116, Fig. 29). It has an input window for receiving atmospheric air and a stream of heated gases (high-temperature gas stream coming from the heat generator), as well as at least one output window for output from the chamber due to the discharge of the working gas mixture. In particular, the chamber has two exit windows connected to the suction nozzles of the fans, which supply the working gas mixture (drying agent) to the upper and middle drying units of the grain dryer.

In this device, during its long operation in the combustion chamber of the heat generator, coke (soot) is formed, as well as scale on its walls, which is especially intense when working on heavy fuels. The disadvantage of the analogue chamber is that it does not have spark-separating elements, therefore, the aforementioned glowing particles in the form of sparks can get into the working units of the grain dryer with the drying agent and increase the risk of unacceptable ignition of the processed product.

The prototype of the claimed device adopted by the mixing chamber, which is part of the gas heater (AS USSR No. 1825070 A1, CL F 24 N 3/02, F 26 V 23/02 publ. 24.04.1991. For official use). This gas mixing chamber has an inlet window for receiving atmospheric air and a stream of heated gases, as well as an outlet window for output from

   9 8 3

F 24 H 3/02; F 26 V 23/02

chambers due to the discharge of the working gas mixture, for example, a drying agent. An inertial spark separator and an ablation collector (particles separated by a spark separator from the gas stream) are located inside the chamber. The inertial spark separator is made in the form of a conical shell of annular blinds adjacent to the output of the combustion chamber of the heat generator. It is made of heat-resistant steel since gases heated to a high temperature (600-750 ° C) pass through it from the heat generator. The ablation collector is installed on the narrow end of the louvre shell of the spark separator and has an axial hole to which a pipe is connected to withdraw the ablation from the collection outside the chamber.

The prototype camera does not have the drawback noted in the analog camera. However, the inertial spark separator of the prototype, made in the form of a conical louvered shell of heat-resistant steel, is quite complex and expensive to manufacture. In addition, up to 5-7% of heated gases, which is an irreplaceable loss of heat, increasing fuel consumption, goes out through the branch pipe for extracting sparks from the ablation collector.

The objective of the utility model is to reduce the cost of the product and the fuel consumption for the process by simplifying the design of the inertial spark separator and the ablation collector, ensuring mixing of the high-temperature stream of heated gases with atmospheric air until they pass through the spark separator, and eliminating heat loss during cleaning of the ablation collector.

This problem is solved in that the claimed gas mixing chamber, like its prototype, has an inlet window for receiving atmospheric air and a stream of heated gases, at least one outlet window for discharging from the chamber due to the discharge of the working gas mixture, for example, a drying agent. Inside the chamber is equipped with an inertial spark separator and an ablation collector. However, unlike the prototype, in the inventive chamber, the inertial spark separator is made in the form of a louvered wall of strips, which is located behind the entrance window and at least partially blocks the passage

section of the camera. Moreover, the louvre wall strips are installed at sharp angles to the direction of movement of the incoming gases, and the ablation collector is located below the inertial spark separator.

The specified new set of common essential features in all cases of the implementation of the claimed camera ensures the achievement of a technical result, named in the task of a utility model.

In addition, in special cases, the ablation collector is made in the lower part of the chamber and is equipped with a discharge flap. This facilitates and accelerates the periodic cleaning of the ablation collector.

In addition, the ablation collector is closed from above by a lattice of corners located upward. Such a lattice increases the reliability of the capture of the separated particles in the ablation collector.

The essence of the utility model is illustrated by drawings.

In FIG. 1 shows the inventive gas mixing chamber used in a grain dryer, side view with local cuts, diagram; in FIG. 2, remote element A of FIG. 1.

In the drawings, the following notation:

1 and 2 - input and output windows;

3 - inertial spark separator;

4- collection of ablation;

5 - strip of the louvered wall of the spark separator;

6 - discharge flap of the ablation collector;

7- corner of the lattice of the ablation collector;

8- fan of the drying unit;

9- fan of the cooling unit of the grain dryer;

10 - heat generator (source of heated gases).

The gas mixing chamber (FIGS. 1 and 2) has an input window 1 for receiving atmospheric air and a stream of heated gases, at least one output window 2 for output from it due to the discharge of the working gas mixture, in particular the drying agent. Inertia placed inside the camera

spark separator 3 and fly collector 4. The inertial spark separator 3 is made in the form of a louvered wall of strips 5. This wall is located behind the inlet window 1 and at least partially overlaps the passage section of the chamber. The strips 5 of the louvered wall of the spark separator 3 are installed at acute angles b (Fig. 2) to the direction of movement of the incoming gases. For example, the magnitude of the named angle b, depending on the shape of the cross section of the strips and other factors, can be 20-60 degrees. The entrainment collector 4 is placed below the inertial spark separator 3. In particular (FIGL, 2), the collector 4 is made in the lower part of the chamber and is equipped with an unloading shutter 6. To prevent accidental removal of particles from the collector 4, it is on top. It is closed by a grating of corners 7 located upward . This grill can be removable or folding.

In this example (Fig. 1), the chamber has two exit windows 2 connected to the suction pipes of the fans 8 of the drying units of the grain dryer. To use the heat released during cooling of the grain, the gas mixing chamber can be connected to the exhaust pipe of the fan 9 of the cooling unit of the dryer. In front of the entrance window 1 of the chamber (FIGS. 1, 2), remotely from it, a source of heated gases is installed, in particular a heat generator 10 operating on liquid fuel.

The gas mixing chamber (figure 1, 2) during operation of the grain dryer operates as follows.

Due to the vacuum created in the chamber by fans 8, atmospheric air and a stream of heated gases having a temperature of 600,700 ° C come into it through the inlet window 1. When moving in the area of the inlet window 1 and further to the spark separator 2, these simultaneously incoming flows are pre-mixed, forming a gas-air mixture of lower temperature. This mixture passes through the gaps between the plates 5 of the spark separator 3.

When the spark separator 3 passes from the mixture of products of combustion of fuel and air, soot and scale particles are separated. This is due to the fact that the trickles of the gas-air mixture entering the gaps between the overlapping strips 5 of the louvre wall of the spark separator 3 (Fig. 2) make a sharp rotation through an angle of up to 120 °. In this case, the particles of soot, scale, etc., which may be in the gas mixture passing through the spark separator 3, continue to move by inertia, slide down the inclined surfaces of the strips 5, and some particles hit them, are reflected down and fall into the entrainment tank 4 . A lattice of corners 7 located upwardly does not allow these particles to be blown out from the entrainment collector 4 in which they accumulate.

Further and better mixing of the cleaned gas-air mixture occurs over the inertial spark separator 3 as a result of turbulent movement when combining its jets emerging from the gaps between the bands 5. In the case under consideration (Fig. 1), additional turbulence contributing to the mixing of the gas mixture occurs due to the supply air from the fan 9 of the cooling unit of the grain dryer. After mixing the flow of heated gases and atmospheric air with the exhaust cooling air coming from the fan 9, a working mixture is formed, which through the outlet windows 2 is discharged from the chamber by the fans 8 of the drying units of the grain dryer.

The soot and scale particles emitted by the inertial spark separator 3 that have fallen into the entrainment tank 4 cool down and accumulate in it. If necessary, clean up the ablation collection 4, removing contents from it by opening its shutter 6. This is done during the next maintenance of the grain dryer, when its heat generator 10 and fans 8 and 9 are not working. This eliminates the heat loss allowed in the prototype during the continuous removal of soot particles and scale with part of the heated gases through the discharge pipe of the ablation collector.

Claims (3)

1. A gas mixing chamber having an inlet window for receiving atmospheric air and a stream of heated gases, at least one outlet window for discharging from the chamber by discharging a working gas mixture, for example, a drying agent, and provided with an inertial spark separator and entrainment collector, characterized in that the inertial spark separator is made in the form of a louvre wall of strips, which is located behind the entrance window and at least partially overlaps the passage section of the chamber, and the louvre wall strips are installed at acute angles to the flow of incoming gases, and the ablation collector is located below the inertial spark separator. 2. The chamber according to claim 1, characterized in that the ablation collector is made in its lower part and is equipped with a discharge flap. 3. The chamber according to claim 1 or 2, characterized in that the ablation collector is closed from above by a lattice of corners located with its vertices up.