RU132167U1 - HEAT PIPE HEAT GENERATOR WITH SMOKE PIPES - Google Patents

Abstract

A fire-tube heat generator with smoke tubes has an air duct, nozzles for the incoming and outgoing coolant, a pipe for the outlet of combustion products, while the heat generator is made with a front wall having a door; in the heat generator, the inner space includes a combustion chamber and a heat exchanger separated by a heat exchange partition; at the same time, smoke tubes pass through the heat exchanger, which on one side exit into the chimney, characterized in that the heat generator is a structure in the form of a vertically oriented body with double side walls and a double bottom, where the bottom of the body has a rectangular shape, the upper surface is a vault shape ; where an internal heat circuit is formed between the double walls, connected to the heat exchanger, while the space inside one side wall, to which the pipes for the incoming and outgoing coolant are connected, is divided by a partition dividing this space into cold and heated zones; where the combustion chamber is the space between the inner side walls, the front and rear walls, the inner bottom and the vault-shaped heat exchange partition, which consists of two parts located at different levels, where the first level is located lower than the second, while these vaults are connected between as a wall, into which the ends of the smoke tubes of the lower course go out; where the heat exchanger is the space inside the surfaces formed by the outer vault and the heat exchange partition, between the side and rear walls and the vertical wall of the heat exchanger, which is the rear wall of the air chamber; where is the air chamber

Description

A heat generator with smoke tubes (hereinafter referred to as a heat generator) is intended for air heating of residential and industrial premises, organization of economical autonomous air heating systems for newly constructed buildings, arrangement of fresh air ventilation systems, drying of materials and other technological processes requiring the supply of heated air. The use of the inventive heat generator allows you to replace electric or water heat sources without dismantling the existing ventilation and air conditioning system.

The purpose of creating a utility model is to create a heat power device that runs on solid fuel, in particular on pellets, with increased heat transfer and high fire safety.

Known heat generator - a unit for air heating, named by the text as an air heater (see TU RB 400083770.016-2000 "TG-T-150, TG-T-150-01 air heaters; VNT-300 and VNT-300-01. Technical conditions" , registered by the State Standard of the Republic of Belarus No. 011474 on 10/18/2000), consisting of a cylindrical-shaped horizontal housing, an annular heat exchanger, a combustion chamber connected to a heat exchanger pipe. The disadvantage of this heater is that to obtain greater heat transfer, it is necessary to significantly increase the overall dimensions of the housing and the heat exchanger, resulting in increased specific metal consumption.

Closest to the claimed heat generator can be considered a technical solution, patented as PM RF 66800. This air heater with a fire tube heat exchanger with forced or natural circulation of the coolant contains a combustion chamber, duct, heat exchanger, pipe for the exit of combustion products. In this case, the combustion chamber and the cylindrical air duct are arranged horizontally and communicate at the end of the combustion chamber with a heat exchanger made of pipes staggered vertically for the removal of combustion products in the area of the heated air stream.

The disadvantage of this heater is also the lack of heat transfer and insufficiently high fire safety due to the fact that its walls can overheat.

A heat carrier is air that is heated in a heat exchange circuit. This air is pumped from the room into the heat exchange circuit and leaves the heat source when heated.

The technical result obtained by using the proposed technical solution is to increase the efficiency of the heat generator, which occurs:

- due to the increase in the passage of flue gases through smoke tubes;

- due to the fact that the heat transfer of the heat exchange circuit increases, because The loop includes the jacket of the heat generator housing, and there is also an air chamber in the heat generator. At the same time, the fire safety of the heat generator is further increased.

Description of the technical solution

The inventive fire tube heat generator with smoke tubes has an air duct, nozzles for incoming and outgoing heat carrier, a pipe for the exit of combustion products and is a design in the form of a metal vertically oriented body

- with a front wall having a door,

- with a rectangular bottom made double,

- double side walls;

- with the upper surface in the form of a vault.

The inner space of the heat generator is divided by the heat exchange surface into the combustion chamber, the air chamber and the heat exchange circuit, including the heat exchanger and the internal heat circuit (the space between the double side walls and the double bottom). The inner space of one of the side walls to which the nozzles for the incoming and outgoing coolant are connected is divided by a horizontal partition dividing this space into cold and heated zones. Above the partition there is a pipe for the outgoing coolant, and under the partition there is a pipe for the incoming coolant.

Heat exchange surface - a surface that transfers heat to a heat carrier. These are the inner surfaces of the bottom and side walls of the heat generator and the lower surface of the heat exchanger, which in turn is the upper surface of the combustion chamber, the outer surface of the smoke tubes.

Horizontally oriented smoke tubes pass through the heat exchanger (low-speed and high-speed pipes), forming passages for the flue gases heated in the furnace. Outside, smoke tubes are washed with a coolant (heated air).

The heat exchanger above and below has surfaces made in the form of arches. The combustion chamber of the heat generator is separated by a heat exchange partition from the air chamber and the heat exchanger.

The air chamber is located between the front wall on which the door is located and the heat exchanger. Smoke tubes of the upper and lower passages enter the air chamber. Upper pipes - pipes leading into the chimney. Pipes of the lower course - pipes that exit into the combustion chamber.

The lower arch of the heat exchanger is a heat exchange partition, has two levels. The first level of the lower roof of the heat exchanger is located above the flame of the furnace. The second level of the lower vault is located above the first level of the lower vault.

The surface forming the first level of the arch extends from the front wall of the heat generator, does not reach the rear wall of the heat generator, and is limited by the wall of the heat exchanger, connecting with the inner side walls of the heat generator. In the wall of the heat exchanger, oriented vertically, pipes (gas ducts) of the lower stroke are removed.

The second level of the lower arch connects the wall of the heat exchanger with the inner jacket of the heat generator from the side of the rear wall and side walls. Above the wall of the heat exchanger are pipes upstream. The upper arch of the heat exchanger is the upper surface of the heat generator, which is located between the outer side walls, and in front it reaches the front wall, and behind - the rear wall of the heat generator.

The first level of the lower arch does not reach the rear wall, and therefore the pipes of the lower course are shorter than the smoke tubes of the upper course and exit into the combustion chamber. On the other hand, these pipes exit into the air chamber, and when passing through the heat exchange chamber they are washed by the heat carrier.

In front of the heat generator in front of the heat exchanger there is additionally an air chamber into which the pipes of the upper and lower passages exit. The air chamber is not directly connected to the combustion chamber. Inside the air chamber, the flue gases passing through the pipes of the lower course change their direction, and then pass through the pipes of the upper course.

Upper pipes are located between the air chamber and the rear wall connected to the chimney.

The furnace chamber is equipped with a furnace into which fuel is automatically supplied, for example, pellets. An ash tray (not shown in the drawings) can be installed under the firebox.

The course of the flue gases in the inventive heat generator is as follows. The gases present in the combustion chamber pass through the low-pressure pipes, enter the air chamber, turn back and pass through the high-pressure pipes and enter the chimney.

The air flow in the heat exchange circuit is as follows:

Air is pumped from the room through the inlet pipe by a blower fan. Air (coolant) enters the heat exchange circuit. Having passed the path between the double walls (shirts) of the combustion chamber, which is heated by the flame of the burned fuel, the heat carrier removes heat from the combustion chamber, then, entering the heat exchanger - from the lower surface of the heat exchanger, as well as from the heated pipes of the lower stroke and further - the pipes of the upper stroke.

Through the exhaust pipe for exhaust air, located in the upper part of the heat exchanger, the heated air enters either the room or the external circuit.

Figure 1, shows the inventive heat generator - side view, figure 2 - section aa, where: 1 - the outer side wall; 2 - inner side wall; 3 - outer bottom 4 - inner bottom, 5 - pipe for incoming coolant; 6 - pipe for the outgoing coolant; 7 - a partition; 8 - combustion chamber; 9 - firebox; 10 - heat exchanger; 11 - internal thermal circuit; 12 - the first level of the lower roof of the heat exchanger; 13 - the second level of the lower arch of the heat exchanger; 14 - wall of the heat exchanger; 15 - pipes of the lower stroke; 16 - pipes of the upper course; 17 - the upper arch of the heat generator; 18 - air chamber; 19 is a vertical wall of a heat exchanger; 20 - front door; 21 - back wall; 22 - chimney.

The fuel of the heat generator is burned in the furnace 9 of the combustion chamber 8. The inventive heat generator is focused on the combustion of pellets. As an alternative fuel for this heat generator - this is gas, and as a temporary - firewood and briquettes. To regulate the combustion process, an automatic system may be provided in the heat generator, including a controller and a blower fan, which, according to the signals from the controller, regulates the supply of blast air and fuel to the furnace of the heat generator.

The flue gases heated in the combustion chamber 8 heat the inner bottom of the heat generator 4, the inner side walls 2 of the combustion chamber and two arches 12 and 13 connected by the wall of the heat generator 14, and pass into the downstream pipes 15. In the air chamber 18, where the pipes are cut into a vertical wall of the heat exchanger 19, the gases unfold and pass through the pipes of the high speed 16. Between all the heated surfaces of the heat generator, and the gases circulating in the heat exchange circuit, the exchange of thermal energy constantly occurs.

The pipe 5, through which the incoming coolant enters and the pipe 6 for cold coolant are located on the outer side wall 2.

Between the outer 1 and inner 2 side walls of the heat generator there is a cavity filled through the pipe for the incoming coolant 5 with the coolant.

Inside this cavity there is a partition 7, which separates the flows of incoming cold and outgoing heated coolant.

The heat carrier circulating inside the walls of the heat generator and inside the heat exchanger forms a heat transfer circuit of the heat carrier, which takes heat from the gases passing through the pipes of the lower stroke 15 and the upper stroke 16. The flue gases that have given off heat are discharged through the chimney 22 into the chimney (not shown).

The heated coolant is removed from the heat generator through the pipe for the leaving coolant 6.

Front door 20 is used to perform cleaning of the internal surfaces of the heat generator.

Examples of the implementation of the heat generator are given in the table.

The power of heat generators can be from 3 kW to 600 kW. Their gradation in power: 15, 30, 50, 75, 100, 150, 200, 250, 300, 400, 500 kW. The size of the heated room can be from 30 m ² to 6000 m ² .

Table No. p / p Options Units measuring SLON-T150 SLON-T300 Elephant T500 one Range of regulation of heat output kw 3-18 6-33 9-54 2 Heated area sq m 30-200 60-350 90-600 3 Efficiency % 93 93 93 four Specific pellet consumption Kg / hour 0.35-3.2 0.7-6.5 1.8-10.8 5 Power consumption W / hour 150 170 180 6 Height, Width, Long mm 1400 * 860 * 1300 1750 * 1200 * 1600 1750 * 1400 * 1650 7 The weight kg 180 310 380 Heat carrier - air 8 Air consumption m3 / h 1970 3230 3800 9 Temperature, no more ° C 95 95 95 10 Connection to the system, input mm 295 295 225 eleven Connection to the system, exit mm 320 320 320 Chimney 12 Cross section mm 140 140 140 13 Height, not less m 5 5 5 fourteen Flue gas temperature, no more ° C 180 180 180

Claims (1)

The fire tube heat generator with smoke tubes has an air duct, pipes for incoming and outgoing heat carrier, a pipe for the exit of combustion products, while the heat generator is made with a front wall having a door; in the heat generator, the internal space includes a combustion chamber and a heat exchanger separated by a heat exchange partition; in this case, smoke tubes pass through the heat exchanger, which on one side exit into the chimney, characterized in that the heat generator is a structure in the form of a vertically oriented body with double side walls and a double bottom, where the bottom of the body has a rectangular shape, the upper surface is the shape of the roof ; where between the double walls an internal heat circuit is formed, connected to the heat exchanger, while the space inside one side wall, to which the pipes for the incoming and outgoing heat carrier are connected, is divided by a partition that separates this space into cold and heated zones; where the combustion chamber is the space between the inner side walls, the front and rear walls, the inner bottom and the heat exchange partition in the form of a vault, which consists of two parts located at different levels, where the first level is lower than the second, while these arches are connected between a wall into which the ends of the smoke pipes of the lower stroke go; where the heat exchanger is the space inside the surfaces formed by the outer arch and the heat exchange partition between the side and rear walls and the vertical wall of the heat exchanger, which is the rear wall of the air chamber; where the air chamber is the space formed between the front wall of the heat generator and the vertical wall of the heat exchanger, the outer side walls of the heat generator, as well as the upper and lower arches; where the fire tubes of the lower stroke are located between the vertical wall of the heat exchanger and the wall of the heat exchanger, smoke tubes of the upper stroke are located between the vertical wall of the heat exchanger and the rear wall of the heat generator and exit into the chimney.

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