BG66233B1 - Heating and hot water tank - Google Patents

Heating and hot water tank Download PDF

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Publication number
BG66233B1
BG66233B1 BG109653A BG10965306A BG66233B1 BG 66233 B1 BG66233 B1 BG 66233B1 BG 109653 A BG109653 A BG 109653A BG 10965306 A BG10965306 A BG 10965306A BG 66233 B1 BG66233 B1 BG 66233B1
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BG
Bulgaria
Prior art keywords
space
opening
hearth
chamber
housing
Prior art date
Application number
BG109653A
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Bulgarian (bg)
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BG109653A (en
Inventor
Северел ПЪРВАНОВ
Original Assignee
Северел ПЪРВАНОВ
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Application filed by Северел ПЪРВАНОВ filed Critical Северел ПЪРВАНОВ
Priority to BG109653A priority Critical patent/BG66233B1/en
Publication of BG109653A publication Critical patent/BG109653A/en
Publication of BG66233B1 publication Critical patent/BG66233B1/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT GENERATING MEANS, IN GENERAL
    • F24H1/00Water heaters having heat generating means, e.g. boiler, flow- heater, water-storage heater
    • F24H1/22Water heaters other than continuous-flow or water storage heaters, e.g. water-heaters for central heating
    • F24H1/24Water heaters other than continuous-flow or water storage heaters, e.g. water-heaters for central heating with water mantle surrounding the combustion chamber or chambers
    • F24H1/26Water heaters other than continuous-flow or water storage heaters, e.g. water-heaters for central heating with water mantle surrounding the combustion chamber or chambers the water mantle forming an integral body
    • F24H1/28Water heaters other than continuous-flow or water storage heaters, e.g. water-heaters for central heating with water mantle surrounding the combustion chamber or chambers the water mantle forming an integral body including one or more furnace or fire tubes
    • F24H1/287Water heaters other than continuous-flow or water storage heaters, e.g. water-heaters for central heating with water mantle surrounding the combustion chamber or chambers the water mantle forming an integral body including one or more furnace or fire tubes with the fire tubes arranged in line with the combustion chamber
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23BMETHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
    • F23B40/00Combustion apparatus with driven means for feeding fuel into the combustion chamber
    • F23B40/04Combustion apparatus with driven means for feeding fuel into the combustion chamber the fuel being fed from below through an opening in the fuel-supporting surface
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23KFEEDING FUEL TO COMBUSTION APPARATUS
    • F23K3/00Feeding or distributing of lump or pulverulent fuel to combustion apparatus
    • F23K3/10Under-feed arrangements
    • F23K3/14Under-feed arrangements feeding by screw
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT GENERATING MEANS, IN GENERAL
    • F24H9/00Details
    • F24H9/0005Details for water heaters
    • F24H9/0042Cleaning arrangements
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28GCLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
    • F28G3/00Rotary appliances
    • F28G3/10Rotary appliances having scrapers, hammers, or cutters, e.g. rigidly mounted
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT GENERATING MEANS, IN GENERAL
    • F24H2230/00Solid fuel fired boiler

Abstract

The tank is used for heating of premises and for hot water boiling for residential needs using biological fuel, ensuring higher efficiency coefficient, reduced amount of harmful emissions in the atmosphere and higher fast operation. The tank comprises a housing within which coaxially and by height the following are fitted: fire place, hollow ring-shaped air duct (40) with holes (41), reflection disc (42), heat exchanger with vertical fire tubes (47) connected to a flue duct. The fireplace is in the form of a hollow horizontal firing plate (26) with multiple openings (29) across which primary air is fed with the same pressure. The revolving cleaners (48) provided for in each of the pipes (47) have spiral form, wound into a profile of rectangular section and resting firmly on the walls of pipes (47). The tank is supplied with a remote control unit (61) which is in connection with multiple sensors and controls the supply of biological fuel, primary and secondary air and the chemical composition of the fuel gases released in the atmosphere.

Description

Technical field

The invention finds application in heating, in particular, for heating and heating domestic water by burning biofuel.

BACKGROUND OF THE INVENTION

Known heating boiler [1], which operates only with pellets, consisting of lined with thermal insulation material in the form of a four-walled prism, in the lower part of which is provided a hearth, shaped as a double-walled housing with multiple openings on its inner surface, through which is in connection with a source of primary air. The inlet for the primary air intake is located in the lateral surface of the double-skinned housing. Below the bottom of the hearth is a biofuel auger connected to a drive mechanism. A biofuel hopper is provided above the front of the auger outside, the boiler body. Above the hearth is a heat exchanger connected to the upper part of the housing, with vertical flue gas ducts. At the lower end of the heat exchanger prior to the flue gas inlet, a flue gas guide is installed, representing a truncated cone with its large base facing down. A hollow annular body is provided in the upper part of the guide housing, immediately before the inlet of the heat exchanger, on which inner outlets are formed along the inner cylindrical surface. The hollow space of the hollow body is connected to a secondary air fan via a pipeline. A flue gas space is formed above the upper end and above the heat exchanger, above which is a metal reflector plate. The housing is fitted with a flue gas outlet. The heat exchanger is equipped with an inlet and outlet for the heat carrier.

The disadvantage of this boiler is that it can only work with pellets and has a relatively low efficiency due to the fact that the combustion takes place in a hearth, on which the inner surrounding surface of which feeds primary air to the biofuel through multiple openings . The combustion of biofuels is incomplete because primary air does not or does not reach the reduced amount of biofuel along the axis of the hearth. In addition, the pressure of the primary air exiting through the different openings in the hearth to the biofuel is different due to the lateral supply of the primary air into the hollow space of the double-walled housing. This causes uneven and incomplete burning of the pellets. On the other hand, the possibility of separating a large amount of soot onto the walls of the heat exchanger further reduces the efficiency due to the difficulty of heat exchange through them.

Another disadvantage of the known boiler is that due to the incomplete and uncontrolled burning of biofuels, a significant amount of harmful emissions is emitted into the atmosphere.

SUMMARY OF THE INVENTION

It is an object of the invention to provide a boiler with an increased efficiency and a reduced amount of environmentally friendly emissions that work with both pellets and other biofuels.

This task is accomplished by a boiler, which consists of a housing with a heat-insulated material, closed by a lid, in the lower part of which a fire is provided. Below the bottom of the hearth is a biofuel auger connected to a drive mechanism. The hearth has numerous openings through which it is connected to a primary air source. A biofuel hopper is provided above the front of the auger outside the boiler body. Above the hearth is a heat exchanger connected to the upper part of the housing, through which a coolant flows. The heat exchanger is implemented with vertical flue gas ducts. Above the hearth and before the entrance of the heat exchanger, a hollow annular body is provided coaxially with the hearth and outlets are formed along the inner cylindrical surface. The space of the hollow annular body is connected to a source by

66233 Bl secondary air. Above the upper end, above the heat exchanger, there is a metal reflector plate, and the space formed between them is connected to a flue gas outlet. According to the invention, the housing is cylindrical and is made up of fixedly connected upper and lower chambers. The lower chamber is double-walled and is constructed of concentrically located outer and inner housings. The outer housing has a flat horizontal bottom and the inner housing has a profile bottom and is at a distance from the bottom of the outer housing. Between them is a space connected to the inlet of the heat carrier. Near the profile bottom, an opening is closed in the wall of the lower chamber, closed with an inspection door, and a movable screen is located in front of it. Two identical openings are formed on both sides of the inspection door in the wall of the lower chamber, lying at the two ends of the same diameter. One opening is closed with a door and the other is closed with a fuel panel. The combustion panel is a hollow door, the interior of which is divided into two separate chambers by a diagonal barrier. One space of the hollow door of the combustion panel is connected to the secondary air source by an opening in the outer wall of the combustion panel, and the other space, through a corresponding opening in the outer wall of the combustion panel, is connected to the primary air source. The hearth is designed as a hollow horizontal combustion plate with a central cylindrical opening extending over the entire height of the combustion plate. A number of primary air openings are formed around the central orifice along the entire upper surface of the hearth, formed as a hollow horizontal fuel plate. A second opening is formed on the underside of the hearth and concentric to the cylindrical opening. The lower end of the central cylindrical opening of the hearth is connected to an inner tube, which consists of a knee and a straight section, along the axis and along the entire length of which is fitted a biofuel auger. The axis of the auger concludes an angle with the horizontal from 3 to 8 °. The inner tube is concentrically enclosed by an outer tube. The space formed between the two pipes is connected, on the one hand, to the primary air fan and, on the other hand, to the internal space of the combustion plate through its second opening. The inner tube passes through the combustion panel, and above its rear end is connected a vertical chute, which is connected to the outlet of the biofuel hopper by means of a fire-safe metering pump. Through the combustion panel passes a pipe connected to its outer end to an ignition device located outside the boiler body, and its other end is located in the space of the inner pipe immediately below the central opening of the firebox. A reflective disk is located above the hollow annular air duct. The inner space of the annular duct is connected to the secondary air fan through one of the combustion chamber chambers. The openings of the hollow annular secondary air duct are arranged in parallel horizontal rows, with the diameter of the openings for each subsequent ascending line being larger than the diameter of the previous one. The heat exchanger is mounted in the upper chamber, and under the lid and at a distance from it is a reflective plate with openings, fixedly connected to the upper chamber. The heat exchanger consists of a plurality of vertical and parallel chimney tubes located below each opening of the reflecting plate. In each chimney there is a rotary scraper rotating around. The chimney tubes are fixedly connected to an upper mirror located at a distance from the reflecting plate and to a lower mirror. A flue gas space is formed between the reflection plate and the top mirror. A space for the heat carrier is formed between the two mirrors, which is connected by means of a pipeline to the space between the outer and inner housings of the lower chamber. At the rear of the upper chamber is a gas turbine panel having an upper opening to which a flue gas fan is connected and a lower opening connected to the flue. The gas turbine panel is equipped with a lambda probe placed in the space before the upper opening and outside the upper chamber of the boiler. On one side of the gas turbine panel there is an outlet for the heat carrier, and on the other side there is an inlet / outlet to / for other heat carriers. There are two openings on each side of the gas turbine panel

66233 Bl side for mounting a heat exchanger temperature sensor in the heat exchanger, a heat exchanger pressure sensor in the heat exchanger, an external wall temperature sensor of the upper chamber, and a chemical gas sensor in the area of the nearest smoke pipe. Each of the sensors listed is connected to a remote control, which is connected to both the lambda sensor and a smoke sensor located directly next to the lower opening of the gas turbine panel.

The profile bottom may be constructed from a central horizontal section, the two sides of which extend into sloping rising sections, one of which extends into a second horizontal section. The central horizontal section has a length equal to the distance between the outer walls of the door and the fuel panel.

Each of the wipers is made, preferably, as a spiral wound stainless steel profile. The upper end of the wiper in the space above the reflecting plate is fixedly connected to the gear wheel, and all the gears are connected by means of an engine gear.

Near the horizontal section at the bottom of the inner casing and under the outer tube there is a waste cleaner, which can be made like a screw. In this embodiment, a guide tube is connected to the door wall, fixedly and coaxially to the auger, along which the front end of the auger extends beyond the lower housing and reaches above the waste hopper. The end of the guide tube is deadlocked, and before it, there is an opening to remove the waste from the waste bin. The auger camps at both ends, respectively, in the back of the guide tube and in the fuel panel.

The ash cleaner can also be designed as a vacuum suction device connected to the waste bin.

The smoke sensor via the remote control is connected to the initial ignition device.

The reflecting plate can be made as a three-layer plate made of a base under which are placed a heat-resistant layer and a stainless steel reflector.

The profile of the wiper is preferably of a quadrangular section, two of the edges of which are in close contact with the inner surface of the chimney tube.

The plurality of openings on the upper surface of the hearth are preferably arranged uniformly in circles concentric to the central opening and have the shape of a truncated cone with their small base downwards.

The advantage of a boiler according to the invention is that it can work in addition to pellets and various other biofuels, for example, wood chips, sawdust, dried animal faeces, corn kernels, soybeans, a mixture of pellets and corn kernels or pellets and soybeans.

Another advantage of the boiler according to the invention is the increased coefficient of efficiency, because the design of the hearth, made as a hollow horizontal combustion plate, produces a uniform combustion of biofuel throughout its upper surface, and at the same time, the design of the provided conical openings prevents them from clogging and reduces the consumption of biofuels at fuller and more even burning. On the other hand, quadrilateral cross-section scrubbers, adhering tightly to the inner surface of the chimney pipes, prevent the accumulation of soot on the walls of the chimney pipes, thereby improving the heat transfer through them, and creating a turbulent movement of the flue gas, extending their flue gas pipes, which further improve the heat transfer. A further increase in the efficiency is also ensured by the fact that the axis of the biofuel auger closes with a horizontal angle of 3 to 8 ° with the horizontal, which avoids its clogging and ensures a uniform feed of the biofuel to the hollow horizontal combustion plate of the hearth.

Another advantage of the boiler according to the invention is the reduction of the emission of harmful emissions into the atmosphere, due to the provision of controlled and more complete combustion of the biofuel due to the many built-in sensors.

66233 Blind signals to the remote control unit, which analyzes them and transmits control signals to the individual units of the boiler, when the flue gases are not in the predefined parameters, and provides additional flue gas treatment to achieve the pre-flue gas set parameters for the amount of harmful emissions into the atmosphere.

Another advantage of the boiler according to the invention is its speed due to the possibility of rapid and simultaneous firing of biofuel on the entire upper surface of the hearth, made as a hollow horizontal burner plate.

Another advantage of the boiler according to the invention is the more even removal of the waste outside the boiler, since the positioning of the waste auger at its two ends avoids clogging causing it to become clogged.

Another advantage of the boiler is that its design allows for easy service maintenance and also its easy transformation from a boiler for one power to a higher power boiler by simply replacing the available hearth, made as a hollow horizontal hob, hollow annular duct and reflector disk, with others corresponding to the desired power.

Explanation of the annexed figures

The invention is explained in more detail by way of an exemplary embodiment shown in the accompanying drawings, where:

Figure 1 is a vertical section along the axis of a boiler;

Figure 2 is a vertical section through AA of the boiler of Figure 1;

Figure 3 is a cross-section of the profile bottom 6;

Figure 4 is a top view of the profile bottom 6;

Figure 5 is a view from the outer wall of the combustion panel 18 with the partially removed outer wall;

Figure 6 is a sectional view along BB of Figure 5;

Figure 7 is a side view of the housing of the boiler partially cut through the door 17;

8 is a vertical sectional view of the hearth 26;

Figure 9 is a top plan view of hearth 26; Figure 10 is an enlarged vertical sectional view of a portion of the boiler shown in Figure 1;

Figure 11 is an axonometry of the upper chamber 1 in lateral view;

Figure 12 is a partial vertical section view of the reflection plate 45 along the axis of the wipers 48;

Figure 13 is a side view of the fuel panel 18 together with the supporting plate 36 and fans for the primary 23 and the secondary 25 fans connected thereto;

FIG. 14 is a vertical section through AA of the boiler of FIG. 1 showing the path of the flue gases forced back into the lower chamber 2 by the flue gas fan for further processing. FIG.

Examples of carrying out the invention

In the illustrated embodiment of the invention, the boiler (Figs. 1 and 2) consists of a cylindrical housing made up of an upper chamber 1 and a lower double-chamber chamber 2, fixedly interconnected by flanges, between which a seal is provided which is heat-resistant . The lower chamber 2 is constructed of concentrically arranged outer 3 and inner 4 housings. The outer housing Zee is a flat horizontal bottom 5. The inner housing 4 has a profile bottom 6 (Figs. 3 and 4), which is at a distance from the bottom 5 of the outer housing 3. The profile bottom 6 is constructed from a central horizontal section 7 on both sides. pass into inclined rising sections 8 and 9, one of which 8 passes into a second horizontal section 10. The central horizontal section 7 has a length equal to the distance between the outer walls of the door 17 and the fuel panel 18. There are spacers between the bottoms 5 and 6. elements 11. Thus, between out nal 3 and 4 internal hull is shaped space connected to the entrance of coolant.

Near the second horizontal section 10, an opening is formed in the wall of the lower chamber 2, which is closed by an inspection door 12, in front of which a movable screen 13 is arranged on the inside, with a possibility of rotation about its upper end. The inspection door

66233 Bl is made of a heat-resistant material and is provided with handles made of thermal insulation material and has a control opening 14 closed with a cap 15. On the sides of the inspection door 12, two identical openings 16 are formed in the wall of the lower chamber 2. both ends of the same diameter. One opening 16 is closed with a door 17 which is hollow and the other is closed with a fuel panel 18. The fuel panel 18 (Figs. 5,6 and 13) is a hollow door whose interior space is divided into two separate chambers 19 and 20 through a diagonal bar 21. One chamber 19 of the combustion panel 18 is connected to a secondary air fan 23 by means of an opening 22 in its outer wall, and the other chamber 20 is connected to a primary air fan 25 by means of a corresponding opening 24 in its outer wall. .

In the center and near the bottom of the inner housing 4 there is a firebox 26 formed as a hollow horizontal combustion plate (FIGS. 8 and 9) with a central cylindrical opening 27 extending over the entire height of the fireplace 26. Around the central opening 27 along the entire upper surface 28 of the hollow horizontal hearth of the hearth 26 are formed a plurality of openings 29 in the form of a truncated cone, with their small base downwards. The openings 29 are arranged evenly in circles concentric to the central opening 27 and ensure complete combustion of the feed biofuel without the risk of clogging. A second hole 27 'is formed on the underside of the hearth 26 and concentric to the cylindrical hole 27. The lower end of the central cylindrical opening 27 of the hearth 26 is connected to an inner tube 30 (Fig. 10). The inner tube 30 consists of a knee and a straight section, along the axis and along the entire length of which an auger 31 is mounted, the axis of which makes an angle with the horizontal from 3 to 8 °, preferably 7 °. The inner tube 30 is enclosed by a concentric outer tube 32. A space is connected between the two pipes 30 and 32 to the chamber 20 of the combustion panel 18, which in turn is connected to the primary air fan 25. The space between the two pipes 30 and 32 is connected to the space of the hearth 26 through its second opening 27 '. The inner tube 30 (Fig. 10,11) passes through the combustion panel 18. A vertical groove 33 is connected above the rear end of the inner tube 30, which is connected to the outlet of the biofuel hopper 35 by means of a fire-safe metering pump 34. The rear end of the auger 31 rests in a support plate 36 closing the space of the inner tube 30. The support plate 36 is fixedly connected to the head of the metering pump 34. The auger 31 is driven by a gear train 37.

A heat-resistant stainless steel tube 38 passes through its upper end (FIG. 10) at its upper end, which is connected at its outer end to an ignition device 39 located laterally and externally on the combustion panel 18. The other end of the pipe 38 is located at the space of the inner tube 30 directly below the central opening 27 of the hearth 26.

Coaxially and at a distance above the upper surface 28 of the hearth 26, a hollow annular air duct 40 is installed, which, along its entire inner surface, has openings 41 arranged in parallel and horizontal rows. The diameter of the openings 41 for each successive ascending line is larger than the diameter of the previous one. Above the hollow annular duct 40 is a reflective disk 42. The width of the annular duct 40 is chosen to provide complete combustion and direct the flame to the center of the reflective disk 42, creating turbulent movement of hot air through the walls of the inner housing 4 of the lower housing. chamber 2. The inner space of the annular duct 40 is connected to the chamber 19 of the combustion panel 18, which in turn is connected to the secondary air fan 23.

Near the horizontal section 7 (FIG. 7) of the profile bottom 6 of the inner housing 4 and below the outer tube 32 there is a waste cleaner 43 constructed like a screw. A fixed guide tube 3 D is mounted in the wall of the door 17 and coaxially with the auger 31, along which the front end of the auger 31 extending beyond the lower chamber 2 extends above the waste bin 63 (Fig. 1). The end of the 3G guide pipe is deadlocked, and before that, a hole is formed on the side of the waste bin 63.

66233 Bl for removal of waste. The auger 31 camps at its two ends, respectively, in the back of the guide tube PG and in the fuel panel 18.

In the upper chamber 1 (Figs. 1 and 2), which is closed by a lid 44, a heat exchanger with vertically arranged pipes is mounted. Under the cover 44 and away from the heat exchanger is mounted a reflective plate 45, made as a three-layer plate, made of a base under which are placed a heat-resistant layer and a reflector made of stainless steel. The reflecting plate 45 (FIG. 12) has shaped openings 46 and is fixedly connected to the upper chamber 1. The heat exchanger includes a plurality of vertical and parallel chimney tubes 47 located below each aperture 46 of the reflecting plate 45. In each chimney tube 47 is 48, each of which is a curved spiral of stainless steel profile with a quadrangular section. The two edges of the quadrangular section are in close contact with the inner surface of the chimney tube 47. The upper end of each sweeper 48 (Fig. 12) is connected to the axis 49, which is supported in the opening 46 of the reflecting plate 45. The upper edge of the axis 49 is fixedly connected to the tooth wheel 50 located in the space above the reflecting plate 45. All the gears 50 are connected by means of an engine gear.

The flue tubes 47 are fixedly connected to the upper chamber 1 by means of an upper mirror 51 and a lower mirror 52. The upper mirror 51 is disposed off from the reflection plate 45, thereby forming a space 53 for flue gases. A space 54 for the coolant is formed between the upper 51 and the lower 52 mirrors. This space 54 for the heat carrier is connected via a conduit 55 to the space between the outer 3 and the inner 4 housings of the lower chamber 2.

At the rear of the upper chamber 1 of the boiler is a fixed gas turbine panel 56 (FIG. 11) which has an upper opening 57 to which a flue gas fan is connected and a lower opening 58 connected to the flue. On one side of the gas turbine panel 56 there is an outlet for the heat carrier, and on the other side there is an inlet / outlet to / for other heat carriers. The gas turbine panel 56 is provided with a lambda probe 59 fitted externally to the upper chamber 1 of the boiler in the space before the upper opening 57. There are openings 60 on either side of the gas turbine panel 56, two on each side, intended for mounting a sensor. for the temperature of the coolant in the space 54, the pressure sensor of the coolant in the space 54, the sensor for the temperature of the outer wall of the upper chamber 1 and the sensor for the analysis of chemical gases in the space of the nearest smoke pipe 47. Each of the sensors listed Which are not shown in the accompanying drawings, it is connected to remote control means 61 (Fig. 1). The remote control 61 is also connected to the lambda probe 59 and to a smoke sensor 62 located adjacent to the lower opening 58 of the gas turbine panel 56.

The remote controller 61 can be implemented through the commercially available Universal Type 5711 OGC Regulator from TEM, Switzerland.

The design of the boiler according to the invention allows for easy service maintenance as well as its easy transformation from a boiler for one power to a higher power boiler by simply replacing the existing hearth 26, the hollow annular duct 40 and the reflecting disk 42, with such corresponding to the desired power. At higher power, the area of the upper surface 28 of the hearth 26 and the reflecting disk 42 is larger. Accordingly, the inner diameter of the hollow annular duct 40 of the diameter of the hearth 26. The number of openings 29 in the hearth 26 and the openings 41 in the hollow annular duct 40 is increased proportionally.

The invention is implemented as a 100 KW boiler.

Effect of the invention

From the biofuel hopper 35, through the metering pump 34, doses of biofuel are fed at the intervals 33 through the vertical chute 33 at the rear end of the auger 31. The metering pump 34 moves according to the programmed by the remote control 61 and discharges the dosed

66233 Bl biofuel, which, by its own weight on the vertical chute 33, falls on the auger 31. The auger 31 transports the biofuel to the central opening 27 of the hearth 26, where it comes in contact with the hot air 38 supplied by the igniter 39. In seconds, the biofuel burns itself. The smoke presence sensor 62 includes a smooth supply of primary air from the fan 25. The air passes in series through the chamber 20 of the fuel panel 18, the space between the pipes 30 and 32, the opening 27 'and enters the cavity of the hearth 26, from which it exits through the conical openings 29 on its upper surface 28. The auger 31 starts to carry out the biofuel smoothly and push up the already burned biofuel onto the upper surface 28 of the hearth 26. This uniform and smooth biofuel removal ensures the burning of the combustible material in the form circle on the upper surface 28 of the hearth 26. On the other hand, due to the fact that the axis of the auger 31 concludes with a horizontal angle of 3 to 8 °, the auger 31 is avoided and the biofuel is fed evenly to the surface 28 of the hearth 26. With increasing the amount of primary air supplied through the openings 29, the shape of which prevents them from clogging, additionally ensures a more complete and even burning of the biofuel. After reaching a certain temperature, the supply of secondary air, which is blown by the fan 23, is switched on. As a result of the continuous pushing of the burning biofuel into a circle concentric to the central opening 27 of the hearth 26, it is possible to ignite all the combustible biofuel quickly and simultaneously. located on the upper surface 28 of the hearth 26, which ensures high speed of the boiler.

The secondary air supplied through the chamber 19 of the combustion panel 18 enters the inside of the hollow annular duct 40 and exits through its openings 41 and comes into contact with the ascending stream of combustible flue gases into which the unburned biofuel particles are entrained, which ensures their complete combustion. further increases the temperature of the flue gas and hence the amount of heat released to the coolant. The annular duct 40 also provides a flame direction to the center of the reflecting disk 42. The upward flow of combustible flue gases due to the pressure pressure is directed to the reflecting disk 42, which deflects it and creates turbulent motion directed towards the lower part of the reflecting disk. the inner housing 4 of the lower chamber 2, whereby their heat is transferred to the heat carrier located in the space between the outer 3 and the inner 4 housings of the lower chamber 2. The flue gases are then directed upwards under the influence of the existing head and, as a consequence of the natural draft created by the flue through the opening 58, pass through the chimney pipes 47 and, before reaching the chimney, give their heat to the already cooled coolant entering the space 54 between the chimney pipes 47 in the space between the outer 3 and the inner 4 housings. through the conduit 55. The movement of the spiral sweepers 48 further improves the heat transfer through the walls of the chimney tubes 47 because, on the one hand, it maintains the inner surface of the chimney surface clean from scratches. by continually scraping them from the sharp edges of the moving profile 48, and on the other hand, it creates a turbulent motion of the flue gas moving upwards in the chimneys 47, thus extending its path.

The heated coolant is output from the boiler to a user, for example, an installation for local heating through an outlet in the upper chamber 1.

Before the flue gases enter the flue 58, they contact the lambda probe 59. The lambda probe 59 supplies the chemical composition of the flue gases to the remote control 61, which, depending on the established chemical composition and predefined parameters, regulates the amount of air, supplied by fans 23 and 25.

When the lambda probe 59 determines that the flue gas outlets 53 are within the set parameters, the control means 61 includes a flue gas fan not shown in the figures for suction and discharge into the atmosphere.

If the lambda probe 59 detects that the

66233 Bl flue gas vents 53 are outside the set parameters, the control means 61 sends a signal to the flue gas fan by switching it into reverse mode, thereby causing the flue gas to return through the space 53 and the flue pipes 47 in. the lower housing 2, where the presence of an increased amount of oxygen in the supplied secondary air occurs, their complete combustion takes place and the norms of the set parameters are reached (Fig. 14).

The boiler according to the invention has a reduced amount of atmospheric emissions, due to the programmed and more complete combustion of the biofuel due to the built-in lambda probe 59, which sends a signal to the remote control 61, which analyzes it and transmits control signals to the the flue gas fan when the flue gas is not within the predefined parameters.

The waste of the burned biofuel is continuously pushed to the periphery of the hearth 26 from the burning biofuel entering through the central opening 27 and from there falling on the inclined sections 8 and 9 of the profile bottom 6 of the inner housing 4 falls on the central horizontal section 7, from where through the means 43 for example, the auger is exported to the waste bin 63.

During the operation of the boiler, whose outlet for the heat carrier is connected to a user, it is possible to remove a portion of the heated heat carrier from the outlet for other heat sources to an additional user. If the boiler connected to the user is not currently running, it is possible through the same port to supply the user (local heating network) in the space 54 with a coolant from another source, for example, a solar panel, without the need for disassembly and installation of new connections. to the user.

Claims (9)

  1. Claims
    1. A boiler comprising a heat-insulated housing enclosed by a lid, in the lower part of which is provided a hearth, below which a biofuel auger is connected, connected to a drive mechanism, and the hearth has a plurality openings through which a primary air source is connected, a biofuel hopper is provided outside the boiler housing above the auger and a heat exchanger is connected above the firebox through which a heat exchanger flows, such as heat exchangers it is provided with vertical flue gas ducts, in which a hollow annular body is provided above the hearth and before the inlet of the heat exchanger, along the hearth, at which outlets are formed along the inner cylindrical surface, and the space of the hollow annular body is connected to the annular body. secondary air source, with a metal reflector plate above the upper end above the heat exchanger and the space formed between them is connected to a flue gas outlet, characterized in that the housing is cylindrical and is constructed a day of connected upper (1) and lower (2) cells interconnected, the lower chamber (2) being double-walled and constructed of concentrically arranged outer (3) and inner (4) housing, with the outer housing (3) having flat horizontal bottom (5), and the inner housing (4) has a profile bottom (6), which is at a distance from the bottom (5) of the outer housing (3), with space between them being connected to the inlet of the heat carrier , and in the vicinity of the profile bottom (6) in the wall of the lower chamber (2), an opening is closed, closed with an inspection door (12), located in front of its inner member. a movable screen (13), wherein two identical openings (16) lying at the two ends of the same diameter as the one opening (16) are formed on the two sides of the inspection door (12) in the wall of the lower chamber (2). ) is closed by a door (17) and the other opening (16) is closed by a fuel panel (18) which represents a hollow door, the interior of which is divided into two separate chambers (19 and 20) by a diagonal barrier (21), with one chamber (19) of the hollow door of the combustion panel (18) by means of an opening (22) in the outer wall of the combustion panel (18) m source for secondary air (23) and the other chamber (20) through a corresponding hole (24) in
    66233 Bl the outer wall of the combustion panel (18) is connected to the primary air source (25), the hearth (26) having a central cylindrical opening (27) extending over the entire height of the hearth (26) and the lower side of the hearth (26) concentric to the cylindrical opening (27) is formed by a second opening (27 '), and the plurality of openings of the hearth (26) are formed on its upper surface (28), with the lower end of the central cylindrical opening (27) ) of the hearth (26) is connected to an inner tube (30) which consists of a knee and a straight section along the axis and along the entire length of the coil o the auger (31) is mounted for supplying biofuel whose axis concludes with a horizontal angle of 3 to 8 ° and the inner tube (30) is concentrically enclosed by an outer tube (32), the space formed between them is connected to the fan for primary air (25), wherein the space between the two pipes (30 and 32) is also connected to the inner space of the hearth (26) through its second opening (27 '), whereby the inner tube (30) passes through the combustion panel ( 18), and a vertical chute (33) is connected above its rear end, which by means of a fire-safe metering the mpa (34) is connected to the outlet of the biofuel hopper (35), through a fuel panel (18) passes a tube (38) connected at its outer end to an ignition device (39) located outside the boiler body and the other the end is located in the space of the inner tube (30) immediately below the central opening (27) of the hearth (26), with a reflective disk (42) above the hollow annular duct (40) and the openings (41) of the hollow annular duct ( 40) are arranged in parallel horizontal rows and the diameter of the openings for each subsequent ascent If the line is larger than the previous one, the heat exchanger is mounted in the upper chamber (1) and the inner space of the annular duct (40) is connected to the secondary air fan (23) through the combustion chamber (19). (18), and under the lid (44) and at a distance from the heat exchanger is mounted a reflecting plate (45) with shaped openings (46) fixedly connected to the upper chamber (1), wherein the heat exchanger consists of a plurality of vertical and parallel ones. other chimney pipes (47) located below each opening (46), such as in c a tight chimney tube (47) is arranged rotating about its sweeper axis (48), and the chimney tubes (47) are fixedly connected to an upper mirror (51) located at a distance from the reflection plate (45), between which a space is formed (53) for flue gas removal, whereby the chimney pipes (47) are fixedly connected to the lower mirror (52) and the space (54) formed between the two mirrors (51 and 52) by the pipeline (55) is connected with the space between the outer (3) and the inner (4) housing of the lower chamber (2) and in the rear the upper chamber (1) is fitted with a gas turbine panel (56) having an upper opening (57) to which a flue gas fan is connected and a lower opening (58) connected to the flue gas space (53), which is connected to the exhaust pipe, the gas turbine panel (56) is provided with a lambda probe (59) located in the space before the upper opening (57) and externally on the upper chamber (1) of the boiler, and on both sides of the gas turbine panel (56). openings (60), two on each side, for mounting a coolant temperature sensor in the space (54) , space coolant pressure sensor (54), outer wall temperature sensor of the upper chamber (1), chemical gas sensor in the space of the nearest smoke pipe (47), each of the sensors listed is connected to the remote control means (61), which is also connected to the lambda probe (59) and to a smoke sensor (62) located adjacent to the lower opening (58).
  2. Heating boiler according to claim 1, characterized in that the profile bottom (6) is made of a central horizontal section (7), the two sides of which extend into sloping rising sections (8 and 9), one of which (8) proceeds to a second horizontal section (10), wherein the central horizontal section (7) has a length equal to the distance between the outer walls of the door (17) and the fuel panel (18).
  3. Heating boiler according to claim 1, characterized in that each of the wipers (48) is a spiral wound stainless steel profile, the upper end of the wiper (48) in the space above the reflector.
    66233 The blade plate (45) is fixedly connected to the gear wheel (50) and all the gears (50) are connected by means of an engine gear.
  4. Heating boiler according to claim 1, characterized in that a waste cleaner (43) is disposed near the horizontal section (7) at the bottom (6) of the inner housing (4) and under the outer pipe (32). auger, and a fixed guide tube (31 ') is mounted through the wall of the hollow door (17) coaxially with the auger (31'), along which the front end of the auger (31) extends beyond the lower chamber (2). which reaches the waste bin (63), with the end of the guide tube (3 D) deadlocked and before it by the hopper waste (63) there is an opening for removing waste, whereby the auger (31) camps at its two ends, respectively, in the back of the guide tube (3 D) and in the fuel panel (18).
  5. 5. A boiler according to claim 1, characterized in that an ash cleaning agent (43) is located near the horizontal section (7) at the bottom (6) of the inner housing (4) and under the outer pipe (32). designed as a vacuum suction device connected to a waste bin (63).
  6. Heating boiler according to claim 1, characterized in that the flue gas sensor (62) is connected to the initial ignition device (39) through the remote control means (61).
  7. Heating boiler according to claim 1, characterized in that the reflecting plate (45) is formed as a three-layer slab, made of a base under which a heat-resistant layer and a stainless steel reflector are arranged.
  8. Heating boiler according to claim 3, characterized in that the profile of the wiper (48) has a quadrangular section, two of the edges of which contact the inner surface of the chimney tube (47).
  9. The boiler according to claim 1, characterized in that the plurality of openings (29) of the hearth (26) are uniformly arranged in circles concentric to the central opening (27) and are in the form of a truncated cone inverted with a small base down.
    Attachment: 14 figures
BG109653A 2006-08-25 2006-08-25 Heating and hot water tank BG66233B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
BG109653A BG66233B1 (en) 2006-08-25 2006-08-25 Heating and hot water tank

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
BG109653A BG66233B1 (en) 2006-08-25 2006-08-25 Heating and hot water tank
PCT/BG2007/000019 WO2008022412A1 (en) 2006-08-25 2007-08-21 Heating boiler
EP07800360.5A EP2054675B1 (en) 2006-08-25 2007-08-21 Heating boiler

Publications (2)

Publication Number Publication Date
BG109653A BG109653A (en) 2006-12-29
BG66233B1 true BG66233B1 (en) 2012-07-31

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Family Applications (1)

Application Number Title Priority Date Filing Date
BG109653A BG66233B1 (en) 2006-08-25 2006-08-25 Heating and hot water tank

Country Status (3)

Country Link
EP (1) EP2054675B1 (en)
BG (1) BG66233B1 (en)
WO (1) WO2008022412A1 (en)

Families Citing this family (12)

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Publication number Priority date Publication date Assignee Title
AT507528B1 (en) * 2008-10-09 2013-01-15 Kalkgruber Johann Heat exchanger for a boiler
SE534371C2 (en) * 2009-01-30 2011-07-26 Ariterm Sweden Ab Cleaning device for pellet-fired heating stoves
AT508157B1 (en) * 2009-08-04 2010-11-15 Schiefer Erwin Device for cleaning a heat exchanger
IT1400646B1 (en) * 2010-07-01 2013-06-28 Jolly Mec Caminetti S P A Device for placing the fuel in a burner
EP2410279A1 (en) 2010-07-21 2012-01-25 Thomas Hipp Low-maintenance heat exchanger comprising rotating scrapers
ITVR20130151A1 (en) * 2013-06-27 2014-12-28 Gruppo Piazzetta Spa Device for the cleaning of smoke tubes
WO2016108709A1 (en) * 2014-12-29 2016-07-07 Felino-Fundição De Const. Mecânicas, Sa Feeding boiler for heating water or other thermal fluid lines with modular heat exchanger and cleaning system
CN105180151A (en) * 2015-10-13 2015-12-23 灌阳县鸿运矿山设备有限公司 Biomass fuel machine
RU168895U1 (en) * 2016-03-24 2017-02-27 Денис Александрович Папилин Water boiler
RU177020U1 (en) * 2017-04-06 2018-02-06 Общество с ограниченной ответственностью "Светлобор" Solid boiler combustion chamber
DE212018000044U1 (en) * 2017-04-06 2018-11-21 Obshestvo S Ogranichennoi Otvetstvennostiu "Svetlobor" Combustion chamber of a solid fuel boiler
CN109751884A (en) * 2019-01-26 2019-05-14 福建省德化县新顺机械有限公司 A kind of ceramic kiln waste heat utilization device

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DE8220521U1 (en) * 1982-07-17 1983-06-09 Wagner, Albert, 6200 Wiesbaden, De Boiler
CH674680A5 (en) * 1987-12-23 1990-06-29 Landis & Gyr Betriebs Ag Variable gas flow device for gas sensor - uses connection pipe coupled to press point ensuring pressure difference at sensor input
DE9000738U1 (en) * 1990-01-24 1990-05-03 Ruhrkohle Ag, 4300 Essen, De
WO2006008762A1 (en) * 2004-07-16 2006-01-26 Filippo Antonio Di Cecilia A pellet heat generator with production of hot water and air

Also Published As

Publication number Publication date
EP2054675B1 (en) 2015-07-15
WO2008022412A1 (en) 2008-02-28
BG109653A (en) 2006-12-29
EP2054675A1 (en) 2009-05-06

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