CN2699145Y

CN2699145Y - High temperature air generator

Info

Publication number: CN2699145Y
Application number: CNU2004200461620U
Authority: CN
Inventors: 楼波; 马晓茜
Original assignee: South China University of Technology SCUT
Current assignee: South China University of Technology SCUT
Priority date: 2004-05-26
Filing date: 2004-05-26
Publication date: 2005-05-11
Anticipated expiration: 2014-05-26

Abstract

The utility model discloses a high temperature air generator, mainly comprising an outer sleeve, an inner sleeve and a burner. The inner sleeve is sheathed in the outer sleeve, and the front end of the inner sleeve is connected with the front end of the outer sleeve. The back end of the inner sleeve is connected with the back end of the outer sleeve and is provided with an opening, and the middle part of the inner sleeve is connected with the middle part of the outer sleeve by a burn-over air pipe which vertically penetrates the middle part of the outer sleeve and is communicated with the inner sleeve. The burner is connected with the front end of the inner sleeve and communicated with the inner sleeve, and an interlayer between the sleeves is arranged between the outer sleeve and the inner sleeve. The radial direction point of the circumference at the front end of the outer sleeve is provided with two ordinary temperature air inlet pipes which are communicated with the interlayer between the sleeves. The upper and the lower sides of the inner sleeve are fixedly provided with metal supports which are fixed on the burn-over air pipe and form a support. The utility model has the advantages of simple structure and convenient machining, and can conveniently generate high-temperature air with low cost and is suitable for the burning processing of the domestic garbage and the poisonous and harmful substance in the industry.

Description

High-temperature Air Generator

Technical field

The utility model relates to Thermal Power Engineering Field, particularly required High-temperature Air Generator in the high temperature air low oxygen combustion technology.

Background technology

The traditional combustion technology has local incandescent spot in flame propagation, Temperature Distribution is also inhomogeneous in the stove, and HTAC (High Temperature Air Combustion is called for short HTAC) is because earlier more than the air preheat to 800 ℃, so have following a series of characteristics that are better than the traditional combustion mode:

(1) guarantee stable burning: the high temperature air temperature surpasses the ignition temperature into stove fuel, has guaranteed the flameholding in the stove;

(2) efficiency of combustion improves: each process of burnings such as the evaporation of fuel, cracking, spontaneous combustion all is able to acceleration among the HTAC, makes stove internal combustion efficient improve;

(3) temperature is even in the stove: owing to go into the stove air themperature near temperature in the stove, improved full furnace temperature greatly and distributed, made the interior temperature of stove be tending towards even;

(4) adaptability of fuel enlarges: because air themperature greater than the ignition temperature of fuel, is difficult in the stove producing ignition difficulties and taking off fiery problem, the adaptability of available fuel is enlarged, be specially adapted to the difficulty combustion fuel of low heat value and high-moisture;

(5) realize the burning low NOx drainage: because the combustion reaction activation energy of combustion gas and oxygen is lower than the reaction activity of oxygen atom and nitrogen, so combustion gas at first with oxygen generation combustion reaction, have only and when oxygen has residue, just carry out the reaction of oxygen atom and nitrogen-atoms, generate Nox, because the deficiency of burning oxygen can significantly reduce the discharging of burning NOx.

The HTAC excellent characteristic makes its scope of application more and more wider, can use the type of furnace of this technology big-and-middle-sized steel-pushing type and step-by-step movement heater for rolling steel, soaking pit, Scale Bell-type Heat Treatment Furnace, radiant tube gas carbruizing furance, ladle baking stove, glass furnace to be arranged, melt aluminium stove, forge furnace etc. at present; Scope can relate to industries such as metallurgy, metal processing, chemical industry, pottery, automobile, weaving.

HTAC has numerous advantages, is considered to a kind of very promising combustion technology, but how economy to produce high temperature air easily be a major issue in the HTAC.The high temperature resistant fine and close heat storage technology of the general employing of present High-temperature Air Generator, first combustion gas, liquid fuel are stored into heat storage to heat after producing high-temperature flue gas, and the compartment of terrain feeds the heat generation high temperature air that cold air removes to absorb the high-temperature heat accumulation body then.In order to produce high temperature air continuously, must there be two cover heat storage devices to move simultaneously, but also the cross valve and the control corresponding system that need the configuration self-timing to switch, system coordination is produced continuously, this system architecture complexity, the cost height is made with running technology and is also had relatively high expectations.

At the shortcoming of existing High-temperature Air Generator, design a kind of simple and easy and practical High-temperature Air Generator, just become the key that HTAC enlarges range of application.

The utility model content

The purpose of this utility model is to provide a kind of High-temperature Air Generator, required High-temperature Air Generator when it is a kind of high temperature air low oxygen combustion, it is simple in structure, and is easy to process, and do not have complicated control system, can produce high temperature air convenient and at low cost.

The utility model is achieved through the following technical solutions: this High-temperature Air Generator mainly comprises outer sleeve, inner sleeve and burner, described inner sleeve is enclosed within the outer sleeve, the front end of inner sleeve is connected with the front end of outer sleeve, the rear end of inner sleeve is connected with the rear end of outer sleeve and opening is arranged, the middle part of inner sleeve is connected by burning airduct with the middle part of outer sleeve, burns airduct and vertically runs through outer sleeve middle part and be connected with inner sleeve; Described burner is connected with the front end of inner sleeve and is connected with inner sleeve, and total is very compact.Interlayer between tube is arranged between described outer sleeve and the inner sleeve, the circumference of outer sleeve front end radially locates to be provided with two normal temperature air inlet tubes, the normal temperature air inlet tube with the tube between interlayer be connected, normal temperature air enters interlayer between tube by the normal temperature air inlet tube, and inner sleeve cooled off, make inner sleeve be unlikely to overtemperature, also play the effect of preheating normal temperature air.

Described inner sleeve is high temperature resistant inner sleeve, comprises combustion chamber, mixing chamber and high temperature air outlet, is connected successively between described combustion chamber, mixing chamber and the high temperature air outlet, and the combustion chamber is used for fuel combustion, and mixing chamber then is used for combustion gas and mixes with air.

Described outer sleeve is the insulating coating tube, is made of heat-insulation layer and outer surface layer, plays insulation and supporting role respectively.

Described inner sleeve up and down both sides is fixed with metallic support, and metallic support is fixed on and burns on the airduct, and inner sleeve is just held by the metallic support of both sides up and down like this, forms support.

The described airduct that burns can have some.

The utility model is provided with two independently air ducts.The one, normal temperature air is by the normal temperature air inlet tube, and interlayer between tube is mixed into the passage of high temperature air again at mixing chamber and high-temperature flue gas; The 2nd, the combustion air passage, portion of air is mixed with combustion gas (oil) as the premix air, sends into burner, and another part is sent into by burning airduct as burning air, makes fuel completing combustion.Two air ducts are independent mutually, can control the temperature and the output of burning and high temperature air easily.

Fuel is the second-time burning process in the utility model, and owing to the premix lack of air, combustion gas (oil) is sent at the inner sleeve middle part and burnt air generation second-time burning in the anterior anoxycausis that takes place of inner sleeve in the burner.This combustion process has guaranteed that the inner sleeve temperature is unlikely to too high, also makes and does not produce temperature mode NOx in the combustion process.

The generation of the utility model high temperature air at first is preheated to preheated air by normal temperature air interlayer between tube, and preheated air and high-temperature flue gas Hybrid Heating in mixing chamber is a high temperature air then.

The utility model has following advantage and effect with respect to prior art:

(1) simple in structure: the utility model main body is an inside and outside sleeve, and it makes simple, and is easy to process, does not have complicated control system;

(2) the utility model need not the cross valve and the revolution poultry thermic devices of switching regularly, as long as the proportioning of reasonable control fuel and air can reach desirable high temperature air quality;

(3) because the utility model is simple in structure, do not have complicated control system, reduced investment can be produced high temperature air at low cost.

Description of drawings

Fig. 1 is the structural profile schematic diagram of the utility model High-temperature Air Generator;

Fig. 2 is the generalized section of Fig. 1 along the A-A line;

Fig. 3 is the structural representation of inner sleeve support place among Fig. 1;

Fig. 4 is the schematic diagram of an application example of High-temperature Air Generator of the present utility model.

Among the figure: interlayer 3-inner sleeve 4-burns airduct 5-normal temperature air inlet tube 6-burner 7-combustion chamber 8-mixing chamber 9-high temperature air outlet 10-metallic support 11-pressure fan 12-outlet regulating baffle plate 13-inlet adjusting valve 14-inlet adjusting valve 15-pressure fan 16-outlet regulating baffle plate 1.1-heat-insulation layer 1.2-outer surface layer between 1-outer sleeve 2-tube

The specific embodiment

The utility model is further described below in conjunction with accompanying drawing.

As shown in Figure 1, High-temperature Air Generator of the present utility model mainly comprises outer sleeve 1, inner sleeve 3 and burner 6, inner sleeve 3 is enclosed within the outer sleeve 1, the front end of inner sleeve 3 is connected with the front end of outer sleeve 1, the rear end of inner sleeve 3 is connected with the rear end of outer sleeve 1 and opening is arranged, the middle part of inner sleeve 3 is connected by burning airduct 4 with the middle part of outer sleeve 1, burns airduct 4 and vertically runs through the middle part of outer sleeve 1 and be connected with inner sleeve 3; Burner 6 is connected with the front end of inner sleeve 3 and is connected with inner sleeve 3; Interlayer 2 between tube is arranged between outer sleeve 1 and the inner sleeve 3, the circumference of outer sleeve 1 front end radially locates to be provided with two normal temperature air inlet tubes 5, normal temperature air inlet tube 5 with the tube between interlayer 2 be connected, normal temperature air enters interlayer 2 between tube by normal temperature air inlet tube 5, and inner sleeve 3 cooled off, make inner sleeve 3 be unlikely to overtemperature, also play the effect of preheating normal temperature air.

Inner sleeve 3 is high temperature resistant inner sleeve, comprises combustion chamber 7, mixing chamber 8 and high temperature air outlet 9, is connected successively between combustion chamber 7, mixing chamber 8 and the high temperature air outlet 9, and combustion chamber 7 is used for fuel combustion, and mixing chamber 8 then is used for combustion gas and mixes with air.

Fig. 2 is the generalized section of Fig. 1 along the A-A line, and Fig. 3 is the structural representation of inner sleeve support place among Fig. 1, and outer sleeve 1 is the insulating coating tube, is made of heat-insulation layer 1.1 and outer surface layer 1.2, plays insulation and supporting role respectively; Inner sleeve is fixed with metallic support 10 in both sides about in the of 3, and metallic support 10 is fixed on and burns on the airduct 4, and inner sleeve 3 is just held by the metallic support 10 of both sides up and down like this, forms and supports.

Fig. 4 is the schematic diagram of an application example of High-temperature Air Generator of the present utility model.Gas (liquid) fuel combustion is carried out at twice, under pressure fan 15 effects, the premix air arrives burner 6 through inlet adjusting valve 14, fuel also arrives burner 6 through inlet adjusting valve 13 simultaneously, they are under burner 6 tissues then, burned device 6 sprays into inner sleeve 3 internal combustion, again the middle part of inner sleeve 3 with burn air and mix completing combustion takes place, wherein premix air and the ratio that burns air are about 7: 3.The flow process that high temperature air produces is: the normal temperature air that pressure fan 11 is sent enters interlayer 2 between tube through outlet regulating baffle plate 12, normal temperature air inlet tube 5, become preheated air after absorbing the heat in the inner sleeve 3, in mixing chamber 8, mix generating the high-temperature low-oxygen air again with the high-temperature flue gas that burns.The combustion air flow process is: the air that pressure fan 15 is sent is divided into two parts, a part is burnt as premix air and fuel mix through inlet adjusting valve 14 together, another part is sent at the middle part of inner sleeve 3 as burning air through outlet regulating baffle plate 16, makes fuel realize second-time burning.

The premix lack of air of the utility model because of sending into, make the front end generation anoxycausis of combustion gas (oil) at inner sleeve 3, the front end temperature of inner sleeve 3 is limited in about 1000 ℃, after normal temperature air cooling in the interlayer 2 between tube, the middle part of inner sleeve 3 with burn air and realize that second-time burning produces high-temperature flue gas, at this moment temperature is controlled at about 1200 ℃, is the highest temperature in the whole inner sleeve 3, and whole process of production does not produce temperature mode NOx.

Inner sleeve 3 of the present utility model adopts the ceramic material of high temperature resistant and good heat-transfer, guarantees energy safe operation about 1200 ℃, and the good heat transfer performance plays the effect of heating preheated air simultaneously.

The utility model is simple in structure, and is easy to process, can produce high temperature air convenient and at low cost, is fit to the burning disposal of house refuse and indusrial toxic harmful material.

Claims

1. High-temperature Air Generator, it is characterized in that mainly comprising outer sleeve, inner sleeve and burner, described inner sleeve is enclosed within the outer sleeve, the front end of inner sleeve is connected with the front end of outer sleeve, the rear end of inner sleeve is connected with the rear end of outer sleeve and opening is arranged, the middle part of inner sleeve is connected by burning airduct with the middle part of outer sleeve, burns airduct and vertically runs through outer sleeve middle part and be connected with inner sleeve; Described burner is connected with the front end of inner sleeve and is connected with inner sleeve; Interlayer between tube is arranged between described outer sleeve and the inner sleeve, and the circumference of outer sleeve front end radially locates to be provided with two normal temperature air inlet tubes, the normal temperature air inlet tube with the tube between interlayer be connected.

2. High-temperature Air Generator according to claim 1 is characterized in that described outer sleeve is made of heat-insulation layer and outer surface layer.

3. High-temperature Air Generator according to claim 1 is characterized in that described inner sleeve is fixed with metallic support in both sides up and down, and metallic support is fixed on and burns on the airduct.