BG3489U1 - Slag cleaning unit - Google Patents

Abstract

The slag cleaning unit is applicable for pneumatic cleaning of pellet burner combustion chamber. It consists of cleaning pipes (1) with cleaning nozzles, arranged horizontally behind the fire grate (2) of a combustion chamber of the pellet burner. The nozzles are connected to a supply pipe (3), which trough a controllable valve (4) is connected to a pipeline of a source of compressed air (5). During combustion in the combustion chamber, its fire grate silts up with the ashes of the burned pellets. To prevent such deposition of silt, the burner after a certain time is switched off programmatically, and the valve is switched on (4), through which valve flows a limited amount of compressed air through the supply pipe (3) to the nozzles, which blow out the accumulated slag. The periods during which the burner is switched off and the valve (4) is activated depend on the quality of the fuel.

Description

Field of technology

The slag cleaning unit is applicable in the field of heating technology, and in particular is used for pneumatic cleaning of pellet burner hearths.

BACKGROUND OF THE INVENTION

From utility model BG 1645 U is known slag cleaning unit for pellet burner, consisting of cleaning heat-resistant ceramic tube, located horizontally on the grill of the hearth of the pellet burner. The ceramic tube is mounted with a clearance on a support shaft connected to a rocker gear connected to a gear motor shaft. The known slag cleaning unit works on the principle of mechanical impact on the accumulated ash on the surface of the hearth of the hearth as the heat-resistant ceramic pipe mixes and pushes the ash out of the grill. The construction of the device is insufficiently reliable and expensive, and mechanical cleaning is not efficient enough.

If poor quality pellets are used, the lack of effective cleaning often necessitates the emergency shutdown of the pellet burner for manual cleaning.

These shortcomings lead to increased fuel consumption-pellets, and reduced efficiency.

The task is to create a slag cleaning unit that:

- reduces the consumption of fuel-pellets;

- increases the efficiency of the pellet burner during combustion;

- increases the comfort during operation of the pellet burner;

- increases reliability due to lack of mechanical parts.

Technical essence of the utility model

This problem is solved by creating a slag cleaning unit for a pellet burner, including two or more cleaning pipes, which end at one end with cleaning nozzles, and at the other end the cleaning pipes are connected to a supply pipe, which is connected via a control valve. to a compressed air source pipeline. The slag cleaning unit also includes a programmable electronic control unit, adapted to be able to send signals to the control valve, respectively to open and close the control valve.

In a preferred embodiment, the compressed air source is a compressor.

The slag-cleaning unit is used for a pellet burner with a hearth with at least one grill, in which the nozzles of the cleaning pipes are located horizontally behind at least one grate of the hearth of the pellet burner.

Preferably, the programmable electronic control unit for the slag cleaning unit is additionally adapted to control the combustion processes in the burner.

In a preferred embodiment, the pellet burner further has a gas-dynamic cleaning unit, including a fan for blowing the pellet burner hearth.

In a preferred embodiment, the nozzles supply air at a pressure of 6-8 bar to blow out the accumulated slag.

The advantage of the slag cleaning unit is that it is applied in pellet burners, reduces the fuel-pellet consumption and increases the efficiency of the pellet burner during combustion and increases the reliability due to the lack of mechanical parts.

Explanation of the attached figures

The slag cleaning unit is shown in more detail in the attached figures, where:

Figure 1 is a longitudinal section of a pellet burner with a slag cleaning unit according to the utility model; Figure 2 is a section along AA of FIG. 1 of the pellet burner with the slag cleaning unit, according to the utility model.

5850 Descriptions to utility registration certificates № 03.1 / 16.03.2020

Exemplary implementation and operation of the utility model

The slag cleaning unit of fig. 1 and FIG. 2, consists of cleaning pipes 1 with cleaning nozzles located horizontally behind the grate 2 of the pellet burner hearth. The nozzles are connected to a supply pipe 3, preferably connected by a soft connection to the valve 4, which in turn is connected to the compressor 5. Alternatively, the supply pipe 3 can be connected by a hard connection to the valve 4.

In a preferred embodiment, the air supply nozzles have a pressure of 6-8 bar to blow the accumulated slag.

The pellet burner is a slag cleaning unit, according to the utility model, it works as follows.

Usually during combustion in the hearth of the pellet burner, the grill 2 is clogged by the ash that remains from the burned pellets. To prevent such a blockage, the burner switches off automatically after a certain programmed time and the valve 4 is opened, whereby a limited amount of compressed air supplied by the compressor 5 is a pressure 6 to 8 bar through the supply pipe 3 to the nozzles. air blows away the accumulated slag. The periods during which valve 4 is activated depend on the quality of the fuel. If the fuel is of good quality - the nozzles are activated for a longer period. The period is determined by the programmable electronic control unit (not shown in the figures).

When the fuel is of poor quality and clogs the grate 2 is slag, the nozzles blow air for shorter periods. When using poor quality fuel, the blowing periods may last longer than when using quality fuel.

The slag cleaning unit can work in combination and is a gas-dynamic cleaning unit, including a fan for blowing the pellet burner hearth. The fan available in the pellet burner (not shown in the figures) for blowing the hearth is switched on to help the slag cleaning unit, between the cleaning periods by means of the nozzles 1, partially cleaning the lighter ash.

The slag cleaning unit is controlled automatically in a set mode, by commands from a programmable electronic control unit (not shown in the figures).

It will be apparent to those skilled in the art that various modifications of the slag cleaning unit are possible, which also fall within the scope of the utility model defined in the appended claims. All parts of the unit can be replaced by technically equivalent elements.

The reference numbers of the technical features are included in the claims, for the sole purpose of increasing the comprehensibility of the claims and, therefore, these reference numbers have no restrictive effect on the interpretation of the elements, these reference numbers are indicated.

Claims (5)

Claims A slag cleaning unit for a pellet burner, comprising two or more cleaning pipes (1), characterized in that the cleaning pipes (1) end at one end with cleaning nozzles and at the other end with the cleaning pipes (1) are connected. to a supply pipe (3), which through a controllable valve (4) is connected to a pipeline of a compressed air source (5), whereby the slag cleaning unit includes a programmable electronic control unit, adapted to supply signals to the controllable valve ( 4), respectively for opening and closing the control valve (4). Slag cleaning unit for pellet burner according to claim 1, characterized in that the source of compressed air (5) is a compressor. Pellet burner is a hearth is at least one grill (2) and a slag cleaning unit according to claim 1 or 2, characterized in that the nozzles of the cleaning pipes (1) are located horizontally behind at least one grate (2) of the pellet burner hearth . Pellet burner according to claim 3, characterized in that the programmable electronic control unit for the slag cleaning unit is additionally adapted to control the combustion processes in the burner. Pellet burner according to Claim 3 or 4, characterized in that a fan for blowing from a gas-dynamic cleaning unit is additionally mounted to the hearth of the pellet burner.