CN2483614Y

CN2483614Y - Smokeless combustion apparatus

Info

Publication number: CN2483614Y
Application number: CN 01227586
Authority: CN
Inventors: 刘慧献
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-06-21
Filing date: 2001-06-21
Publication date: 2002-03-27
Anticipated expiration: 2011-06-21

Abstract

The utility model discloses a combustion supporting device which is added to a coal-burning device. The combustion supporting device comprises a blower, an air distribution chamber, and multiple stages of air pipes which are connected with the air distribution chamber; a main air duct of primary air extends into the lower part of fire grates; a main air duct of secondary air is arranged in an insulation layer above the fire grates; a main air duct of tertiary air is arranged above the main air duct of secondary air; nozzles on the main air ducts of secondary air and the tertiary air are communicated to a combustion chamber. The utility model uses multiple stages of air to blow into the combustion chamber, so that hydrocarbon, etc. in fuel can be promoted to be burned sufficiently and completely; heat efficiencies of stoves or kilns can be improved; the black smoke which is produced in the process of burning coal can be eliminated effectively; the purposes of environmental protection and energy saving can be realized.

Description

Smokeless combustion device

The utility model relates to the annex on a kind of burner, specifically a kind of auxiliary combustion equipment that is attached on the coal-burning installation.

The coal-burning installation that China uses at present is old-fashioned Industrial Boiler, tunnel cave mostly, and small heater boiler, drinking water boiler etc.The combustion system of these stoves, kiln is relatively backward, is in a conventional manner promptly in fire grate bottom oxygen supply mostly.This combustion system is influenced by fire grate and coal seam thickness, the oxygen supply deficiency, can not satisfy the clean-burning needs of combustible that fuel bed is separated out, combustibles such as unburned free charcoal, carbon black are effluxed with flue gas, cause burning insufficient, energy waste, the thermal efficiency is low, but also the formation over-emitting black exhaust, contaminated environment.At present, coal-smoke pollution is the chief component of China's atmosphere pollution.For stove, kiln fully being burnt and reducing formed black smoke pollution, people have designed a lot of technical schemes, but all can not fundamentally address this problem, so environmental administration have to take to limit using of stove, kiln and require measures such as refuelling to carry out passive management.And this way to manage can only make plant downtime or increase production cost, thereby is unfavorable for development, the progress and stable of society.

The purpose of this utility model just provides a kind of smokeless combustion device that is attached on the coal-burning installation, with when solving stove, kiln oxygen supply deficiency, incomplete combustion, eliminates formed energy waste of over-emitting black exhaust and environmental pollution.

The purpose of this utility model is achieved in that this device is made up of air blast, distribution plenum and the multistage airduct that is connected with distribution plenum, the front end of a wind air main extend into the fire grate bottom of combustion chamber in the coal-burning installation, secondary wind air main is positioned at the heat-insulation layer on fire grate top, the tertiary air air main is positioned at the top of secondary wind air main, and the nozzle that is connected with secondary wind air main and tertiary air air main leads in the combustion chamber respectively.

Operation principle of the present utility model is: at first, coal enters burner hearth absorption heat and carries out preheating, and when temperature reached 100 ℃, water evaporates was comparatively strong, for the burning of fugitive constituent in the coal and coke is prepared.In this stage, utilize a wind of fire grate bottom can finish required oxygen consuming amount.Subsequently, coal continues to heat up, and fugitive constituent begins to separate out.At this moment, under the cooperation of primary and secondary air is adjusted about fire grate, fugitive constituent is fully mixed with air, and reach burning-point, take fire.Along with the further rising of furnace temperature, coke takes fire.This is main combustion phases, and strong oxidation reaction makes oxygen demand reach the peak.This stage oxygen-supplying amount deficiency of traditional approach, the tertiary air that this device then is blown into by the tertiary air air main satisfies the oxygen consuming amount in this stage.

A wind of this device is below fire grate, and secondary wind is on the burning zone surface, in the combustion chamber of tertiary air on secondary wind.One time wind at first contacts with fuel, to solve the low problem of bottom coal dew-point temperature.Utilize secondary wind to control the metallic element compound of separating out, the formation of free state carbon, the fuel gas that fuel bed is volatilized fully burns.Because secondary wind can not be excessive, so designed tertiary air.According to the special construction of certain coal-burning installation, can also increase wind four times.The utility model utilizes multistage wind spraying into the combustion chamber, promote abundant, the completing combustion of the combustibles such as hydrocarbon in the fuel, improved the caloric value of coal, increased the efficient that burning is exerted oneself, and eliminated the generation of black smoke effectively, really realized the purpose of environmental protection and energy saving.After hand-fired boiler was installed this device, through combustion testing, the thermal efficiency improved 15%, and economizing on coal reaches 30%, even stoking, stir fire, at the sign that the chimney outlet is not also made a fire, effect is very remarkable.

Below in conjunction with accompanying drawing the utility model is further described.

Fig. 1 is the structural representation that the utility model uses on smelting furnace.

Fig. 2, Fig. 3 be respectively Fig. 1 A-A to B-B to cutaway view.

Fig. 4 is the structural representation that the utility model uses on handwarmer, kiln.

Fig. 5 is that the C-C of Fig. 4 is to cutaway view.

In the smelting furnace shown in Fig. 1-3, melting pan 1 lower space is combustion chamber (burner hearth) 2, and fire grate 5 is arranged at the bottom, combustion chamber.The front end of a wind air main 6 in the smokeless combustion device extend into the bottom of fire grate 5, and secondary wind air main 10 is positioned at the heat-insulation layer on fire grate 5 tops, and tertiary air air main 9 is positioned at the top of secondary wind air main 10.Each air main leads to distribution plenum 12 respectively, and air blast 13 joins with distribution plenum.But on each air main, be connected to air register 11 respectively,, adjust the difference of three air mains and give air quantity, realize purpose energy-conservation, that eliminate smoke with at different burning coals.Among Fig. 2, be connected with the pre-warm-air pipe 4 of secondary wind on secondary wind air main 10, pre-warm-air pipe is positioned at the heat-insulation layer of burner hearth both sides.Add the pre-warm-air pipe of secondary wind, can increase the delay preheating time of secondary wind, prevent that the situation that causes chamber temperature to descend, worsen combustion process occurs because of directly being blown into of secondary wind.Nozzle 7 is arranged on the pre-warm-air pipe 4, and leads in the combustion chamber.The height of nozzle 7 is the top layer position, coal seam in the combustion chamber generally.One section in secondary wind air main relative combustion chambers 10 also is distributed with nozzle 7, to strengthen the secondary wind action.The opening of nozzle 7 can be folk prescription hole or circular hole.Be connected with the pre-warm-air pipe 3 of tertiary air that goes in ring on the tertiary air air main 9, this pre-warm-air pipe inboard is evenly equipped with nozzle 8.Nozzle 8 leads to the combustion chamber obliquely, to push down furnace flame, stops flame and heat directly to efflux, and makes burning more abundant.Nozzle 8 has angle with the diameter line of the pre-warm-air pipe 3 that goes in ring, and the designs of nozzles of this inclination can make tertiary air spray in the mode of rotation, intersection, thereby more adapts to the burning needs of smelting furnace.

In Fig. 4, handwarmer shown in Figure 5, kiln, but air main at

different levels

6,9,10 connects distribution plenums 12 by air register 11, and leads in the stove.Be connected with the pre-warm-air pipe 4 of secondary wind on secondary wind air main 10, pre-warm-air pipe is positioned at the heat-insulation layer of both sides, fire grate 5 top.Nozzle 7 is arranged on the pre-warm-air pipe 4, and leads in the combustion chamber 2.Tertiary air air main 9 is a straight tube, and its coconnected nozzle 8 leads to the combustion chamber obliquely.

Claims

1, a kind of smokeless combustion device that is attached on the coal-burning installation, it is characterized in that this device is made up of air blast (13), distribution plenum (12) and the multistage airduct that is connected with distribution plenum (6,9,10), the front end of a wind air main (6) extend into the fire grate bottom of combustion chamber in the coal-burning installation, secondary wind air main (10) is positioned at the heat-insulation layer on fire grate top, tertiary air air main (9) is positioned at the top of secondary wind air main (10), and the nozzle (7,8) that is connected with secondary wind air main (10) and tertiary air air main (9) leads in the combustion chamber respectively.

2, smokeless combustion device according to claim 1, but it is characterized in that being connected to respectively on each air main air register (11).

3, smokeless combustion device according to claim 1 is characterized in that being connected with the pre-warm-air pipe of secondary wind (4) on the secondary wind air main (10), and this pre-warm-air pipe is positioned at the burner hearth both sides, and nozzle (7) is arranged on the pre-warm-air pipe (4).

4, smokeless combustion device according to claim 1 is characterized in that tertiary air air main (9) is a straight tube, and the nozzle of Lian Tonging (8) leads to the combustion chamber obliquely thereon.

5, smokeless combustion device according to claim 1 is characterized in that being connected with on the tertiary air air main (9) the pre-warm-air pipe of tertiary air (3) that goes in ring, and this pre-warm-air pipe inboard is evenly equipped with nozzle (8).

6, smokeless combustion device according to claim 5 is characterized in that the nozzle (8) and the diameter line of the pre-warm-air pipe (3) that goes in ring have angle, and leads to the combustion chamber obliquely.