CN201233002Y

CN201233002Y - Energy-conserving apparatus for coal-fired boiler

Info

Publication number: CN201233002Y
Application number: CNU2008201268652U
Authority: CN
Inventors: 左为干
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-07-03
Filing date: 2008-07-03
Publication date: 2009-05-06
Anticipated expiration: 2018-07-03

Abstract

The utility model relates to an energy saving device for a coal burning boiler. The energy saving device consists of a gas transportation pipeline, an overheater and a plurality of spray rods, wherein the spray rods are arranged on a wind feeding chamber of a boiler, each of the spray rods is provided with a plurality of small holes, the openings of the small holes face upwards to be opposite to a coal burning layer, the spray rods are connected with an outlet of the overheater by the pipeline or by passing through an adjusting valve and then the pipeline. The device induces steam from a gas distributing cylinder of the boiler, and transfers the induced steam to the overheater of the boiler, so that the steam become dried steam with the temperature of 500 DEG C to 800 DEG C. The dried steam is then fed to the spray rods in the wind feeding chamber of the boiler, and finally the dried steam is sprayed outside from the small holes of the spray rods to thoroughly mix and burn with the coal burning layer. The energy saving device is applicable to the technical reform of the existing coal burning boilers, in particular applicable to be used by the existing chain-type boilers and fire-heating power-generating boilers, and can achieve the benefit of energy saving and efficiency increasing.

Description

The coal-burning boiler energy-saving device

Technical field

The utility model relates to a kind of coal-burning boiler energy-saving technology, particularly relates to the energy saver that adopts high temperature drying steam and coal mixed combustion, to improve the efficient of boiler fired coal, reaches object of energy saving.

Background technology

Existing industry coal-boiler utilizes coal to add airborne oxygen combustion, and air themperature is low more, and the burning of coal effect is poor more.

The efficient of existing industry coal-boiler is lower, and efficiency of combustion is the highest only to be reached about 70%, long service time with boiler, and burning condition worsens, and efficiency of combustion can further reduce.

Therefore, in the coal-burning boiler and stove and accessory of current use, can improve efficiency of combustion, just can save the tens thousand of tons of coal in the world every day, for existing Industrial Boiler, the coal tiger that these coal consumptions of thermal power generation are big, on the basis of former useful coal, can economize on coal 20%, Quan Guo Industrial Boiler so, the thermal power plant, just can save some ten thousand tons in raw coal every day, existing domestic briquet stove if all use advanced energy-conservation coal vapour burner, not only can be saved a large amount of coal, more outstanding is to make the combustion efficiency of the flare of coal stove near liquified-gas stove, improves people's environment greatly.

Goal of the invention

The purpose of this utility model is to propose a kind of device that improves fired coal combustion efficient, basically do not changing under the condition of original coal-burning boiler or Range structure, by introducing dry steam and coal-fired the mixing, fully burning, make the burning ton coal steam production of boiler or stove and accessory improve 20-40% on the original basis, to reach object of energy saving.

The purpose of this utility model is achieved in that and the utility model proposes a kind of coal-burning boiler energy-saving device that this energy saver comprises:

One gas pipeline, this pipeline is connected with the gas-distributing cylinder of boiler;

One superheater, it is indoor that described superheater is arranged on boiler combustion with the form of coil pipe, and the inlet of this superheater connects gas pipeline;

A plurality of spray booms, described spray boom are arranged on the boiler plenum chamber, and spray boom has a plurality of apertures, and upwards facing to coal-fired layer, spray boom is connected with the outlet of described superheater by pipeline by pipeline or via control valve the aperture opening again;

At the boiler gas-distributing cylinder to the described gas pipeline between the described superheater, steam flowmeter, steam control valve and steam pressure gauge successively are installed in series.

To between the spray boom atmospheric valve is installed at described superheater.

Connect the outlet of described superheater and the branched pipe of spray boom and be divided into two-way, in described a plurality of spray boom, have a spray boom directly to be connected with one road branched pipe, all the other spray booms are respectively by two control valves, be connected successively with the two-way branched pipe, two control valves are installed in the outside of boiler again.

The afterbody of described a plurality of spray booms is provided with blowoff valve, and this blowoff valve is positioned at the opposite side that is in the boiler of relative position with two control valves.

Use coal-saving device of the present utility model, realize the mixed combustion of coal vapour, on same boiler, burn the coal of same 5,000 kilocalories, ton coal steam production improves 20-30%.

The utility model does not change the structure of existing coal-burning boiler, under the condition that does not influence boiler pressure part, increases auxiliary equipments such as jet chimney superheater, steam-flow meter, valve, spray boom, and former boiler is undergone technological transformation, and has realized the energy-efficient of fire coal.

According to coal-saving device of the present utility model, can be used for water-tube boiler.The simple installation site that changes spray boom and superheater just can reach same result of use.

Description of drawings

Fig. 1 is the structural representation of coal-burning boiler energy-saving device of the present utility model.

Among the figure

1 gas pipeline, 9 spray booms

2 steam-flow meters, 10 control valves

3 shutoff valves, 11 spray booms

4 Pressure gauges, 12 control valves

5 superheaters, 13 spray booms

6 boiler furnaces, 14 blowoff valves

7 atmospheric valves, 15 blowoff valves

8 firing chambers, 16 blowoff valves

The specific embodiment

Coal-burning boiler energy-saving technology of the present utility model is to put one group of superheater in that boiler combustion is indoor, the saturated vapor of boiler is transported in the superheater from gas-distributing cylinder with pipeline, because operating temperature is generally at 800 ℃-1000 ℃ in the combustion chamber of boiler, therefore can obtain 500 ℃-800 ℃ dry steam from the exit of superheater, described dry steam, be that the vial road is behind delivering vapor, see that indoor the shell of pipeline is transformed into the dry combustion method look by normal color daytime, and vapor (steam) temperature at this moment should be more than 650 ℃.Be connected to dry steam on the spray boom that is provided with in each air compartment of boiler with pipeline, send at each spray boom on the pipeline of dry steam control valve is housed, combustion position, control and regulation valve according to the coal seam, combustion chamber, reasonable distribution dry steam consumption, by the effect of air blast wind-force, realize the mixed combustion of coal vapour.

Use 500 ℃-800 ℃ dry steam and coal combustion in the utility model, make combustion position produce qualitative leap, according to using thermocouple measurement, 5.5 kilocalories identical coal burns, pure coal combustion temperature is 1230 ℃-1250 ℃, after adding dry steam, combustion flame temperature is that 1310 ℃-1330 ℃, flame volume can increase and are twice, and flame temperature improves 80 ℃.And according to mensuration on probation, the analysis of several industry coal-boilers, ature of coal is below 4.5 kilocalories, difficult use adds the vapour burning, 4.7 adding vapour burning steam production, a kilocalorie above ature of coal improves obviously, the above coal of 5,000 kilocalories adds the pure coal combustion ton of vapour ratio of combustion coal steam production and improves more than 20%, and the coal of 6,000 kilocalories adds the pure coal combustion ton of dry steam ratio of combustion coal steam production and improves more than 40%.According to the digital proof of practice summary, adopt method coal of the present utility model to add the dry steam burning, ature of coal is good more, and the dry steam addition is big more, and ton coal steam production is high more.

Below with reference to accompanying drawing energy saver of the present utility model is described in further detail.Fig. 1 is the structural representation of coal-burning boiler energy-saving device of the present utility model.With reference to accompanying drawing, described energy saver picks out a gas pipeline 1 from the gas-distributing cylinder of former boiler, the steam flowmeter 2 that is installed in series successively on pipeline 1, steam control valve 3, steam pressure gauge 4, pipeline 1 become the superheater 5 of this device with the form of coil pipe in former boiler furnace 6.From the outlet of superheater 5, steam pipeline is connected to the middle part of boiler, and tells two branched pipes.Adorn an atmospheric valve 7 on a branched pipe, another branched pipe is divided into two-way, and one the tunnel connects spray boom 11 successively, and control valve 10 is connected control valve 12 and spray boom 13 successively with spray boom 9, another road.Wherein, spray boom 9 is by control valve 10 controls, and spray boom 11 is a direct injection, and spray boom 13 is by control valve 12 controls.Spray boom 9,11,13 is installed on the plenum chamber of boiler roast area 8, two ends are stretched out boiler jacket, are equipped with many apertures on spray booms, eyelet is upwards facing to coal-fired layer during installation, control valve 10,12 is installed in the outside of boiler one side, blowoff valve 14,15,16 is positioned at the opposite side of boiler, is installed in the afterbody of each spray boom.

When reality was used the utility model device, this moment, boiler should be in the normal combustion state.Check atmospheric valve 7 and blowoff valve 14,15,16 earlier, confirm as closed condition, control valve 10,12 is in open mode, then slowly open control valve 3, make steam from the gas-distributing cylinder of boiler enter superheater 5 and produce dry steams, dry steam feeds spray boom 9,11,13, and many apertures from spray boom spray dry steam and coal-fired mixed combustion.Steam supply through a few minutes, if the pointer of Pressure gauge 9 keeps stable state, amplifying evaporation capacity for engine, after evaporation capacity for engine increases, should observe the boiler furnace combustion case, according to the rising of the temperature adjusting evaporation capacity for engine that still descends, rise as finding stove hall chamber temperature, can transfer big evaporation capacity for engine by control valve 3, as find that stove hall temperature descends or identical with temperature before the steam supply, should finely tune evaporation capacity for engine immediately,, realize the abundant burning of coal vapour by the adjustment of evaporation capacity for engine.

When regulating evaporation capacity for engine, can reference vapor flowmeter 2, the steam flow of these steam-flow meter 2 reflections also can be as regulating the evaporation capacity for engine reference value, and Principles of Regulation are identical with said method.

Hereinafter the operation principle to whole device describes: Boiler Steam is delivered into superheater 5 by gas pipeline 1, the boiler steam is under the control of shutoff valve 3, flowing of regime flow, the flow of Boiler Steam shows in Pressure gauge 4, Boiler Steam is heated to temperature in heater 5 zones be 500 ℃-800 ℃, and original Boiler Steam is transformed near the high temperature drying steam that decomposes.Aperture ejection from spray boom.Enter firing chamber 8, enter the reactive combustion process.

The quantity delivered of boiler steam is the key that water uses with coal-fired mixed combustion in boiler, use the purpose of shutoff valve 3 can control the Boiler Steam flow exactly with frame for movement exactly, Pressure gauge 4 is the pressure that specifically shows steam, and just Boiler Steam is delivered into the flow demonstration of heater 5.As long as steam shutoff valve 3 is opened, the steam regulation flow, can be according to boiler internal roast area scope and sintering temperature, the thermal effect that adds to the boiler steam is determined the supply flow value, guarantee that Boiler Steam in heater 5 pressure limits, is heated to suitable temperature to Boiler Steam, enter the boiler firing chamber from spout, 500 ℃-800 ℃ water vapour continues to add thermal response through the district that overdoes, can reach coal and the steam required condition of burning in reaction.

Power-economizing method of the present utility model and device are applicable to the technological transformation of existing coal-burning boiler, are particularly useful for existing chain type boiler and burning hot electricity generation boiler and use, and can reach the benefit of energy efficiency.

Claims

1, a kind of coal-burning boiler energy-saving device is characterized in that comprising:

2, energy saver according to claim 1 is characterized in that, at the boiler gas-distributing cylinder to the described gas pipeline between the described superheater, steam flowmeter, steam control valve and steam pressure gauge successively are installed in series.

3, energy saver according to claim 1 is characterized in that, between the spray boom atmospheric valve is installed at described superheater.

4, energy saver according to claim 1, it is characterized in that, connect the outlet of described superheater and the branched pipe of spray boom and be divided into two-way, in described a plurality of spray boom, there is a spray boom directly to be connected with one road branched pipe, all the other spray booms by two control valves, are connected with the two-way branched pipe respectively more successively, and two control valves are installed in the outside of boiler.

5, energy saver according to claim 1 is characterized in that, the afterbody of described a plurality of spray booms is provided with blowoff valve, and this blowoff valve is positioned at the opposite side that is in the boiler of relative position with two control valves.