CN2380804Y

CN2380804Y - High-temp. flue-gas conveying apparatus for life-garbage incinerating furnace

Info

Publication number: CN2380804Y
Application number: CN 99213122
Authority: CN
Inventors: 李福泉
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-07-01
Filing date: 1999-07-01
Publication date: 2000-05-31
Anticipated expiration: 2009-07-01

Abstract

The utility model relates to a high-temp. flue-gas conveying apparatus for a life-garbage incinerating furnace,; the integral body is hyperbolic. The utility model comprises a fume inlet, a mixing section, a transition section and a diffusing section; an air inlet is arranged on the side wall of the fume inlet; a high pressure air pipe is arranged in the fume inlet. The upper end of the apparatus is arranged in an exhaust gas combustion chamber and the lower end leads to a grate of a drying zone. The utility model is characterized in that the high pressure air with low temperature is used as jetting medium; the driven medium of exhaust gas is leaded out of the exhaust gas combustion chamber and is conveyed to the drying zone; thereby, the garbage is in advance preheated before combusting; contained moisture is dried; the sufficient combustion in the combustion process can be ensured.

Description

The high-temperature flue gas transmitting device of domestic waste incineration

The utility model relates to a kind of flue gas transmitting device of incinerator, mainly is applicable to the flue gas transmission of domestic waste incineration.

Because it is the moisture content of house refuse is higher, very unfavorable to burning.Therefore, solving the rubbish oven dry just becomes when last important topic, and the incinerator of China's production does not at present generally also address this problem.

The purpose of this utility model is to provide a kind of high-temperature flue gas transmitting device of incinerator, utilizes combustion refuse to produce waste gas so that the heat energy that produces comes preheating and dries rubbish, makes rubbish abundant after-flame when burning.

The purpose of this utility model is achieved through the following technical solutions:

High-temperature flue gas transmitting device monnolithic case is hyperbola, upper and lower mouthful of diameter is greater than mid diameter, be divided into from top to bottom is four sections: gas approach 41, mixer section 42, changeover portion 43 and diffuser 44, the gas approach upper end passes to the waste gas burning chamber, the bottom is provided with high-pressure air hose 412 in the gas approach 41, the upper end of this high-pressure air hose links to each other with a high pressure positive blower, and its lower end passes to mixer 42, and the lower end of this device is the air compartment that the outlet of diffuser 44 passes to incinerator dry section fire grate below.

The utility model high-temperature flue gas transmitting device is according to aerodynamic principle, the high speed medium that utilization sprays from high-pressure air hose, attract and drive that another kind of medium motion is designed to, its operation principle is: flow is the high-pressure air hose 412 in the gas approach 41 of air access to plant under P0 pressure of G1, speed with V1 sprays from high-pressure air hose 412, pressure is reduced to P1, the rapid-result negative pressure in ejection back, flow is that the flue gas of G2 is brought in the device, the velocity field that enters mixer 42 begins skewness, in the process of gas flow, homogenising gradually; Hydrostatic head rises to P2 from P1, mist is V2 in the mixer muzzle velocity, be increased to P0 at diffuser 44 gradually by mixture pressure, speed rises to V from V2, formation pressure is P0, flow is for the mist of (G1+G2) flows out the outlet of this device, overcomes the air compartment preheating rubbish below fire grate after the resistance of ducting, and utilizes flue gas heat energy oven dry rubbish.

The advantage of the utility model high-temperature flue gas transmitting device is: simple in structure, reasonable in design, with the cryogenic high pressure air as ejection medium, to be driven the medium flue gas and be drawn the preheating zone that is transported to the primary zone from the waste gas burning chamber, make rubbish in advance preheating before burning, oven dry institute water content, guarantee in combustion process, can fully burn, the waste gas that comes from dual firing chamber in addition is after the high temperature heating, preheating enters the air in the air preheater, hot-air enters the primary zone again and plays combustion-supporting effect, makes the abundant after-flame of rubbish.

Below by an embodiment and conjunction with figs. design feature of the present utility model is described further.

Fig. 1 flue gas transmitting device structural representation.

Fig. 2 domestic waste incineration structural representation.

The 1-hopper 2-3-of dual firing chamber spray bar

4-flue gas transmitting device 41-gas approach 411-air inlet

412-high-pressure air hose 42-mixer 43-changeover portion

The 44-diffuser

5-hanging beam 6-fire grate 7-dry section

8-air preheater 9-furnace roof 10-ash chute

11-support 12-hydraulic cylinder 13-push rod

14-connecting rod 15-primary zone 16-air compartment

The 17-dirt-excluding groove

See also the structural representation of Fig. 1 flue gas transmitting device and Fig. 2 domestic waste incineration, rubbish enters from hopper, after the preheating of fire grate epimere dry section, enters fire grate hypomere primary zone again and fully burns, and the lime-ash of after-flame enters in the dirt-excluding groove.Above fire grate 6, be connected with an arch furnace roof 9, the furnace roof top is dual firing chamber 3 and air preheater 8.The waste gas that primary zone 15 combustion refuses produce enters dual firing chamber 3 from the flue of dual firing chamber below, wherein a part of waste gas is through being equiped with the utility model high-temperature flue gas transmitting device in dual firing chamber 3, another part waste gas enters air preheater 8 by the flue between dual firing chamber and the air preheater.The dual firing chamber that passes to suitable for reading of high-temperature flue gas transmitting device, the lower end passes to the air compartment 16 of dry section fire grate below, its integral body is hyperbola, be divided into from top to bottom is four sections, gas approach 41, mixer 42, changeover portion 43, diffuser 44, high-pressure air hose 412 is equipped with in the bottom in the gas approach 41, has air inlet 411 on the sidewall of gas approach 41, by a high pressure positive blower pressure-air is blown into from this air inlet 411, in the gas approach section, has formed negative pressure; Fuel injected in the past dual firing chamber of one high-pressure oil pump is arranged this moment in addition, make the waste gas burning that enters in the dual firing chamber, temperature can reach 700-800 ℃, the waste gas of burning is under the effect of negative pressure, bring in the high-temperature flue gas transmitting device with pressure-air, the high-temperature flue gas that is attracted out is along the outlet of tail end diffuser 44 ejection, enters into the air compartment preheating rubbish below the fire grate, and oven dry rubbish institute water content.Dual firing chamber 3 is communicated with air preheater 8, and also is sprayed with fuel oil in the air preheater, and a part of waste gas that comes from dual firing chamber is met oil inflame generation heat energy; One airduct is housed in the air preheater 8 in addition, this airduct ambient atmosphere that passes to suitable for reading, the lower end passes to the primary zone 15 of furnace roof below, this airduct is from the air that enters suitable for reading, during through air preheater 8, the waste gas of burned generation heat energy heating (note: the waste gas of heating does not directly mix with air), the air after heating is sprayed onto primary zone 15 from the air preheater lower end again, the hot-air that replenishes can play combustion-supporting effect, makes the abundant after-flame of rubbish on the fire grate.

Claims

1. the high-temperature flue gas transmitting device of a domestic waste incineration, this device upper end is connected in the waste gas burning chamber of incinerator, the lower end passes to the air compartment that the incinerator dry section transmits the fire grate below, it is characterized in that: high-temperature flue gas transmitting device monnolithic case is hyperbola, be divided into from top to bottom is four sections, gas approach (41), mixer (42), changeover portion (43) and diffuser (44), the diameter that gas approach (41) is suitable for reading and diffuser (44) exports is greater than the interlude diameter; The gas approach upper end passes to the waste gas burning chamber, in gas approach section (41), be provided with high-pressure air hose (412), this high-pressure air hose upper end links to each other with a high pressure positive blower, its lower end passes to the mixer (42) of this device, and the lower end of this device is the air compartment that the outlet of diffuser 44 passes to incinerator dry section below fire grate.