Solid-fuel feeder

FIELD: power industry.

SUBSTANCE: solid-fuel feeder contains a hopper placed above the furnace, the outlet of which is communicated through the fuel supply chamber to the grate surface, equipped with a crank-and-rod mechanism of its reciprocating motion, and a drive of this mechanism. In the cavity of the fuel supply chamber, the fuel dispenser is placed, the upper and lower gate valves are rotatable about horizontal axes parallel to the front wall of the furnace and the baffle plate with an inclination of not less than the sliding angle of the coal along the steel. The dispenser comprises a cylindrical fuel drum provided with equidistant triangular protrusions oriented along generatrixes, rotatably mounted about the horizontal axis parallel to the front wall of the furnace, is provided with a rotation drive and is made of a length equal to the width of the fuel supply chamber. The upper gate valve is hinged to the rear wall of the fuel supply chamber with the upper edge, and the lower part is supported on the portion of the fuel drum facing it. The lower gate valve is hinged to the rear wall of the fuel supply chamber with the upper edge, below the rotation axis of the fuel drum, and the lower one is supported against the surface of the grate plate surface facing it. The feeder is provided with a work unit for coordinating the operation of the reciprocating motion of the grate plate and the drive of the fuel drum. In addition, a receiving chamber is formed between the hopper and the fuel supply chamber in the form of a hollow body contiguous therewith, in the cavity of which there is an inclined unloading plate with an inclination of not less than the sliding angle of the coal along the steel, the upper edge of which is rigidly fixed to the rear wall of the receiving chamber, is placed with a clearance to the front wall of the receiving chamber. Improved depth regulation of fuel delivery and accuracy of its dosing is provided for operation at low loads.

EFFECT: invention makes it possible to increase the depth of fuel supply regulation and the accuracy of its dosing, when operating at low loads.

2 cl, 2 dwg

 



 

Same patents:

FIELD: power industry.

SUBSTANCE: method of stabilisation of liquid coal fuel implemented as a suspension and emulsion system for its storage and transportation in tanks by means of bubble mixing of disperse phase and disperse medium. Before placement for storage in a sealed container the liquid coal fuel is aerated, and during storage in a controllable manner it is degassed by gradual discharge of excessive pressure of gas above the fuel mirror surface through the top discharge valve. The liquid coal fuel is aerated by atmospheric air. The liquid coal fuel is aerated by furnace gas.

EFFECT: providing long period of storage of liquid coal fuel in stable state for its transportation in tanks within several days from the place of production of liquid coal fuel to the location of combined heat and power plant without use during transportation of mixers, circulation pumps and compressors.

4 cl

FIELD: power industry.

SUBSTANCE: invention relates to heat-power engineering, namely to solid fuel heating systems, and can be used for creation of long burning solid fuel heating devices. The method of dynamic air distribution in the top burning heating device in which air for fuel is supplied through section-regulated, depending on temperature, an air intake hole and through one or several fixed air ducts into main and additional windows which are self-regulated by the fuel rest height, and designed in the mobile tape placed in each air duct.

EFFECT: simplification of system of supply of air to fuel in the top burning heating devices, its reduction in cost and improvement of reliability.

4 cl, 1 dwg

FIELD: heating.

SUBSTANCE: invention refers to thermal power industry, particularly to solid-fuel heating systems. Continuous-burning heating boiler includes heat-insulated body with double wall forming vessel for heat carrier along the body perimeter and in its top part, with heat exchanger of hot water supply loop positioned in the vessel. The boiler features top and bottom orifices for flue gas exhaust, gas-tight loading and ash hatches, air dispenser including two immobile vertical air ducts with lengthwise slots inside the body, each air duct featuring conveyor band with several openings that engages by a bracket with opening driver through power-driven opening; the air ducts are interconnected by transverse air duct with air intake hole, positioned under the body bottom, and gate mounted above it is connected via an arm, link and rocker arm to the top surface of the body; rocker arm axle is mounted in top part of heat insulation housing, travelling gear is positioned above gravity centre of opening driver in lifting mode and is attached to it by a flexible element; shutter controlled by the second thermal controller is installed in top hole pipe for flue gas exhaust; each conveyor band of air ducts features openings with a defined area.

EFFECT: improved cost efficiency and burning duration due to boiler design.

4 cl, 2 dwg

FIELD: power industry.

SUBSTANCE: method of solid fuel combustion involves fuel combustion on a grate, air supply to combustion zone via a duct above the grate, air exhaust through the grate slot to a duct, small fuel and slag fraction filtering in the duct, further removal of combustion remainders from the grate and duct by duct wall opening and grate slop cleaning. Small fuel fractions are removed before burning, dried during burning and fed to a next grate with smaller slot, positioned below the first grate.

EFFECT: higher fuel combustion grade, simplified furnace design, enhanced furnace efficiency.

6 cl, 5 dwg

FIELD: power industry.

SUBSTANCE: method of two-stage combustion of solid fuel involves furnace filling with solid fuel in lumps, oxidiser supply to the furnace through grates at the furnace bottom, where in operation mode the oxidiser is fed through grates in amount insufficient for full oxidation of lump fuel, afterburning of obtained gas outside if the furnace using additional oxidiser feeding, combustion heat transfer to heat exchange system with tubular heat exchangers filled with liquid heat carrier, and flue gas exhaust. Side surfaces of the furnace ore formed by tubular heat exchangers installed over gaps, and pyrolysis gas collection chamber is positioned between heat exchangers and furnace housing.

EFFECT: higher energy saving, reliability, durability, improved specific output of heat energy per furnace volume and weight.

10 cl, 2 dwg

FIELD: power industry.

SUBSTANCE: control method of flue gas temperature, in which volume of incoming air is changed, and flue gas is divided during fuel combustion into hot and cold flows, and a hot flow value is changed and it is combined with the cold flow. The method can be implemented in solid-fuel heating devices of direct heating (furnaces), indirect heating (boilers) and mixed heating, as well as heating devices with upper firing, upper loading, gas-generating units, etc.

EFFECT: improving efficiency of solid-fuel heating devices in a wide range of generated thermal capacities due to flue gas temperature stabilisation.

2 cl, 2 dwg

FIELD: power industry.

SUBSTANCE: intensification method of a combustion process of low-reactivity coal in TPP boilers involves ignition and combustion of pulverised-coal low-reactivity fuel, at introduction to the combustion process of a water emulsion with a nanoadditive in the form of a soluble taunite.

EFFECT: increasing dynamics of a combustion process and burnout completeness of coal in TPP boilers.

1 dwg

FIELD: heating.

SUBSTANCE: invention relates to the field of multichamber kilns for baking carbon blocks. The method of controlling the oven (1) is that the zone of natural preheating is divided into at least one first zone (Z1) of natural preheating, located at a first distance from the heating device, and a second zone (Z2) of natural preheating, located at a second distance from the heating device, and the said first distance is greater than the said second distance, and in which the gas flows circulating in the hollow partitions are changed, so as to control the gas flows (30, 31) extending through the first zone (Z1) of natural preheating, based on the gas flows (31) passing from the second zone (Z2) of natural preheating, to regulate the temperature increase of the partitions and the anodes in the first zone (Z1) of natural preheating and to control the position of the front of degassing.

EFFECT: invention enables to improve the quality of fuel combustion.

22 cl, 11 dwg

Gas generator // 2527552

FIELD: machine building.

SUBSTANCE: gas generator comprises the ring-shaped gasification camera in the housing, furnace and located inside grate capable of rotation, in the top of the housing the branch pipe for bleeding of power gas, is made, and load compartment located along a vertical axis of the housing, under the load compartment the furnace is located , and in bottom of the housing the air inlet is placed, the dome-shaped grate is made with a possibility of complementary translational movement, the ring-shaped camera of gasification is made with external and internal walls and located around of the load compartment, and in the top of the gasification camera the walls are connected, and in the bottom of the gasification camera its internal wall is connected with the wall of the load compartment, and the outer wall is connected with the air inlet wall, the camera is capable to be cooled, and the branch pipe for bleeding of power gas is connected to the device for power gas extraction.

EFFECT: increase of continuous work time and increase of performance at simultaneous decrease of fuel consumption.

2 dwg

FIELD: chemistry.

SUBSTANCE: method of destruction of a carbon and nitrogen- containing raw material includes supply of the carbon and nitrogen-containing raw material into a cylindrical case, its heating, creation of depression inside an internal case cavity, output of gas and discharge of a sol residue. The internal case cavity is preliminarily heated before supply of the raw material into a channel of loading, the raw material, supplied constantly from the channel of is loading, is moved by means of an auger and successively directed into a chamber of initial decomposition, heating to a temperature of 120-340C under pressure of 600-500 KPa, formed moisture and initial pyrolysis gas are output though a gas-output net into a chamber of afterburning, supplying in it oxygen in a composition of air in a dosed way until oxides CO, NO are obtained, then the raw material is subjected to destruction at first in the first zone at a temperature of 340-1000C and pressure 600-700 KPa, and then in the second zone at a temperature of 1700C and pressure 900-700 KPa. Depression in the zones is regulated by changing depression in tubes of a depression contour, which belong to the respective zone, oxygen in the composition of air in the case shaft is supplied through a window of a sol canal.

EFFECT: invention makes it possible to increase a degree of the raw material destruction.

3 cl, 1 dwg

FIELD: mining industry.

SUBSTANCE: method for extraction and underground use of coal includes cleaning extraction and dumping of coal, fixing and controlling ceiling and transporting coal along face to drift. On the drift, in moveable generator, coal is pulverized for intensive burning with use of jets in water boiler firebox, where high temperature of steam is achieved (about 1400 C), enough for decomposition of water on oxygen and hydrogen. These are separated, then oxygen is fed back to jets, and hydrogen is outputted along pipes and hoses in drifts and shaft. Variants of underground generator for realization of this method are provided. Also provided is method for extraction of disturbed coal beds by short faces. It includes extraction and dumping of coal on face conveyor, fixing of ceiling behind combine, moving conveyor line and support sections in direction of cleaning face displacement, control of ceiling with destruction and partial filling. Extraction of coal is performed in short curvilinear faces by long stripes along bed, in straight drive without forwarding drifts, with preservation and reuse of ventilation and conveyor drifts, equipped with mounting manipulator robots, with fixing behind combine by automatically operating support deflectors without unloading and displacing sections in area of coal extraction. Extraction and transporting of coal is performed by fast one-drum combine and curvilinear reloading conveyor, supplying coal to drift conveyor or immediately to underground gas or energy generator placed immediately on drift. Also proposed is face scraper conveyor for realization of said method, wherein pans are made with step along front face profile, greater, than along back one, while forming common line curved towards face with constant curvature. Also proposed is a method for controlling complex for unmanned coal extraction.

EFFECT: higher efficiency, effectiveness, broader functional capabilities.

8 cl, 5 dwg

FIELD: hard-fuel furnaces.

SUBSTANCE: furnace for burning hard fuel has burning chamber, fire-bar grating in it with through aperture and layer of heat-insulating material, placed on grating, according to invention, through apertures of grating are provided with pipe-like channels, passing through layer of heat-insulation material, placed on grating.

EFFECT: higher durability.

2 cl, 3 dwg

Heat generator // 2253797

FIELD: heat power engineering.

SUBSTANCE: heat generator comprises combustion chamber with charging port and cover, expanding chamber with separating vertical wall and opening in the bottom section, and system of controllable gate valves with gas ducts and controllable sucking device. The heat generator is additionally provided with the mixing chamber and recirculation system which has active gate valve of the combustion chamber with air intake passages and gate valve of afterburning arranged below the expanding chamber in front of the opening in the separating vertical wall. The mixing chamber is mounted above the expanding chamber to define the closed contour of the recirculation system.

EFFECT: simplified structure.

3 cl, 2 dwg

Gas-producing plant // 2263249

FIELD: power engineering.

SUBSTANCE: gas-producing plant comprises gas-producing furnace connected with the heat exchanger through the gas duct. The furnace is defined by the vertical housing whose bottom section confines the zone of combustion and gasification, intermediate section that confines the zone of pyrolysis, and top section that confines the zone of drying fuel and has a hopper for charging the fuel. The plant has cylindrical nozzle mounted on the bottom inner section of the top section and deflector that underlies the nozzle and directs the flow of the producer gas. The plant also has filter for removing mud particles from the producer gas, device for supplying secondary air for burning the producer gas upstream of the heat exchanger. The intermediate section of the gas duct is provided with a water jacket connected with the space of the water jacket of the top section through the supplying pipeline.

EFFECT: enhanced efficiency of purification of the producer gas.

4 cl, 5 dwg

Boiler furnace // 2263250

FIELD: boiler equipment.

SUBSTANCE: furnace can be used in structures of boilers with layer-by-layer burning of solid fuel at fire grates. Furnace of boiler has unit for feeding fuel, fire grate providing supply of primary air, secondary air nozzles' tiers disposed at face and back walls. There are two tiers of nozzles of secondary air on the face wall. Secondary air nozzles of lower tier are disposed lower than unit for feeding fuel and higher than fire grate; they are oriented similarly at the same plane along its surface. Secondary air nozzles of higher tier are disposed above unit for feeding fuel and oriented down at the same plane which makes acute angle with face wall. There is tier of secondary air nozzles at the back wall which nozzles are oriented at the same plane to unit for feeding fuel.

EFFECT: improved burn-out of small fractions.

8 cl, 3 dwg

FIELD: combustion.

SUBSTANCE: method comprises setting waste on the grate, supplying heat agent, burning waste, using heat of combustion, and purifying discharged gases. The layer of limestone is set under the waste to be burnt out. The limestone layer simultaneously heats absorber and sorbent of toxic components of the discharged gases and is converted into construction lime. The ratio of the thickness of the waste layer to that of the lime layer is 9:2.5. The heat agent flows through both of the layers from the side of the waste layer.

EFFECT: expanded functional capabilities.

2 cl, 2 dwg

FIELD: the invention refers to arrangements for firing solid fuel predominantly waste wood and peat.

SUBSTANCE: the arrangement has a mine for fuel feeding, a combustion chamber, a fire-grate, an arrangement with a nozzle end for feeding air of forced draught for firing fuel along the contour of the combustion chamber and an afterburner. The peculiarity of the arrangement is that the fire-grate is fulfilled out of disconnecting sections each of which is provided with a hollow insertion with a nozzle-end. At that the nozzle parts of the insertions along the contour of the combustion chamber are fulfilled in the shape of sections located at the level of the sheet of the fire-grate in parallel to it and connected with a collector of the arrangement for supply air of forced draught with possibility of regulating an effective cross-section of the feeding zone. The insertions are installed perpendicularly to the fire bars. The length of the insertion equals the width of the fire- grate. The number of the sections of the fire- grate is no less than two.

EFFECT: allows to increase productivity and exploiting reliability and also possibility of regulation of power in a wide range.

3 cl, 1 dwg

FIELD: the invention refers to furnace plants for firing wood waste.

SUBSTANCE: the automatic furnace plant for firing wood waste has a furnace with a lid, lateral and butt-end walls of the furnace formed from the interior side with a cooling jacket fulfilled in the shape of rectangular tubes; an air supply system which includes a blow-out ventilator installed on the lid of the furnace and a valve designed for regulation of air supply and control for the process of firing the fuel. At that air channels are made in the lid and it is provided with a cooling jacket and the uncovering and the covering up the lid is fulfilled with the help of hydraulic actuators. Besides the furnace plant has an ash collector, an ash disposal system consisting out of a half-tube with a diameter of more than 500 mm installed in the lower part of the furnace and covered with a fire-grate and containing a ventilator of high pressure and a drawing off ventilator with a cyclone, the bottom of the furnace is made with inclination for pouring of ash into the ash collector and banking fuel, exterior walls of the furnace are planked with sheet metal and the space between interior and exterior walls are heat-insulated with sand.

EFFECT: allows to simplify the construction of the furnace plant and the technology of firing wood waste without preliminary decomposition.

1 dwg

FIELD: the invention refers to the field of firing of solid fuel in a dense bed and may be used in the fire-chambers of solid-fuel heat -generators, ovens, steam-boilers and hot-water boilers.

SUBSTANCE: the essence of the proposed mode of firing of solid fuel in a dense bed is in that that the surface of the fire-grate is cleaned from burning furnace remains before each regurgitation of fuel, the fuel is thrown over in a layer with the thickness from 0,1 to 2 m and the layer of the fuel is ignited at least in one point of its square. From the burning fuel neighboring sections are ignited and the burning spreads in the shape of a front moving in a horizontal flatness from the place of ignition like a forest fire. Burning furnace remains from preceding regurgitation of fuel which are shoved up in separate sections on the fire-grate may serve as a source of ignition. For reducing air consumption it is directed only under those sections of the fire-grate's square above which the burning front is at this moment.

EFFECT: reduces consumption of fuel and air.

1 cl

FIELD: generation of electric power by off-standard method in underground mining plants.

SUBSTANCE: proposed underground energy complex includes boiler in whose furnace coal is burnt and turbo-electro-generator package to which superheated steam is delivered from boiler. Turbo-electro-generator package and boiler are located directly in underground working made in rock beyond zone of bed from which coal is burnt. This working is engageable with horizontal working interconnecting two shafts; one shaft which is used for evacuation of gas is provided with heat exchange apparatus connected with water conduit by means of pump; said water conduit runs to reservoir installed on raised area relative to surface with cooling apparatus. Running from cooling apparatus are passages at spaced vertical location in other shaft; they are connected to water receiver by means of water conduit. Water receiver is provided with unit for decomposition of mine water into oxygen and hydrogen by electrolysis method; hydrogen is delivered to boiler furnace with the aid of meter and pipe line.

EFFECT: enhanced efficiency.

1 dwg

Solid-fuel feeder // 2628366

FIELD: power industry.

SUBSTANCE: solid-fuel feeder contains a hopper placed above the furnace, the outlet of which is communicated through the fuel supply chamber to the grate surface, equipped with a crank-and-rod mechanism of its reciprocating motion, and a drive of this mechanism. In the cavity of the fuel supply chamber, the fuel dispenser is placed, the upper and lower gate valves are rotatable about horizontal axes parallel to the front wall of the furnace and the baffle plate with an inclination of not less than the sliding angle of the coal along the steel. The dispenser comprises a cylindrical fuel drum provided with equidistant triangular protrusions oriented along generatrixes, rotatably mounted about the horizontal axis parallel to the front wall of the furnace, is provided with a rotation drive and is made of a length equal to the width of the fuel supply chamber. The upper gate valve is hinged to the rear wall of the fuel supply chamber with the upper edge, and the lower part is supported on the portion of the fuel drum facing it. The lower gate valve is hinged to the rear wall of the fuel supply chamber with the upper edge, below the rotation axis of the fuel drum, and the lower one is supported against the surface of the grate plate surface facing it. The feeder is provided with a work unit for coordinating the operation of the reciprocating motion of the grate plate and the drive of the fuel drum. In addition, a receiving chamber is formed between the hopper and the fuel supply chamber in the form of a hollow body contiguous therewith, in the cavity of which there is an inclined unloading plate with an inclination of not less than the sliding angle of the coal along the steel, the upper edge of which is rigidly fixed to the rear wall of the receiving chamber, is placed with a clearance to the front wall of the receiving chamber. Improved depth regulation of fuel delivery and accuracy of its dosing is provided for operation at low loads.

EFFECT: invention makes it possible to increase the depth of fuel supply regulation and the accuracy of its dosing, when operating at low loads.

2 cl, 2 dwg

Up!