CN202279768U

CN202279768U - Glass kiln capable of heating combustion-supporting air on flue

Info

Publication number: CN202279768U
Application number: CN2011202621751U
Authority: CN
Inventors: 不公告发明人
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-07-20
Filing date: 2011-07-20
Publication date: 2012-06-20
Anticipated expiration: 2021-07-20

Abstract

A glass kiln capable of heating combustion-supporting air on a flue relates to the field of energy conservation of a combustion-supporting air kiln for plate glass production. By means of improvement on the kiln flue and a combustion-supporting air pipeline structure, the flue and combustion-supporting air pipelines are combined into a structure including an upper box and a lower box, the section structure is shaped like a Chinese character 'ri' (see Figure 1), the integral structure is in heat insulation, hot flue gas is fed into the lower box, namely the flue, the air is fed into the upper box, namely the combustion-supporting air pipelines, a plane structure of each combustion-supporting air pipeline is improved into a rectangular annular structure, main combustion-supporting air pipeline reversing valves A and B are controlled by switches in different directions, pneumatic valves are mounted on the branch combustion-supporting air pipelines corresponding to a small furnace and are controlled by switches in the same direction, and reversing of all the pneumatic valves is automatically controlled by a reversal system. The upper box and the lower box formed by welding stainless steel plates 4mm in thickness, 25 heat exchange tubes are mounted on a shared plane per square meter, heat of the flue gas is transferred to the combustion-supporting air jointly by the shared plane and the heat exchange tubes, and the temperature of the combustion-supporting air can rise from 50 DEG C to more than 200 DEG C, so that energy source recovery is completed by means of heat exchange.

Description

Heating combustion air glass furnace on the flue

Affiliated technical field

The utility model relates to sheet glass and produces air-breathing saving energy in kiln field; Behind furnace flue and combustion air pipeline modification; Utilize the hot flue gas in the flue that the combustion air in the combustion air pipeline is heated, carry again through regenerator and get into the kiln burning, reach the purpose of energy-saving and emission-reduction.

Background technology

At present; The thermo-efficiency of developed country's glass furnace is generally 30～40%, and the thermo-efficiency of China's glass furnace on average has only 25～35%, and the heat that the flame kiln gas is taken away accounts for 30%～35% of aggregate supply heat; Fully reclaim fume afterheat; Utilize waste heat, fuel economy is the important channel of saving energy in kiln; The technical scheme that has proposed now many recovery flue gas heat as: smoke and waste steam boiler, fume afterheat generating, full-oxygen combustion reduce exhaust gas volumn etc.; But various flue gas waste heat recovery measures produce new problem again; The steam that waste heat boiler reclaim to be produced, that hot water can't make full use of thermo-efficiency is still lower; It is very high that the investment of cogeneration possesses scale effect operation comprehensive cost greatly and not, full-oxygen combustion facility investment and running cost higher (unique advantage is environmental protection).

Summary of the invention

For fully, reclaim the glass furnace fume waste heat cheaply, save energy overcomes the deficiency of existing flue gas waste heat recovery method; The utility model technology unites two into one flue and combustion air pipeline through the transformation to furnace flue and combustion air pipeline configuration, and cross-sectional configuration is: day font structure (like Fig. 1 type); Casing integral body all adds insulation; The end face of flue is the bottom surface of combustion air pipeline, and the two shared this face, combustion air pipeline and flue are combined into up and down two independently body structure passages; Lower box is the logical hot flue gas of flue, and the flue cross sectional area increases by 80% on original design basis; Upper box is a combustion air pipeline blowing air; Combustion air pipeline end face and two sides are with 3mm Plate Steel weldering system; Outside surface adds the thick lagging material of 20mm, and cross sectional area increases by 80% on original design basis, and combustion air pipeline two dimensional structure transform rectangular ring structure (like Fig. 2 type) as; Combustion air main pipe line air operated reversing valve A, B change incorgruous on-off control into, open the A side valve when opening B side valve, kiln B side fire during kiln A side fire; Corresponding port is installed pneumavalve: A 1, A 2, A 3, A 4, A 5, A 6, A 7 on the combustion air A side branch road; Corresponding port is installed pneumavalve: B 1, B 2, B 3, B 4, B 5, B 6, B 7 on the combustion air B side branch road; Port small transfer line pneumavalve is an on-off control in the same way, and all pneumavalves are controlled switching-over automatically by changing ignition system.The heat of flue gas conducts heat to combustion air through casing common surface and heat transfer tube; Common surface adopts the thick stainless steel plate weldering of 4mm system to form, and guarantees that two passages do not have gas leak phenomenon, on common plane, every square metre 25 heat transfer tubes is installed; Heat transfer tube and stainless steel plate adopt full weld to be tightly connected; Last lower box is stopped gas leakage, and the heat of lower box flue gas made the combustion air heat temperature raising through common surface and the continuously conduction of the combustion air in upper box of heat transfer tube when kiln was produced; Can combustion air temperature be warming up to more than 200 ℃ by 50 ℃; By combustion air heat is directly taken back in the kiln, accomplish flue gas heat exchange, reclaim, make fume afterheat to reach directly to utilize molten glass again.

The beneficial effect of the utility model is; Utilize flue gas heat at flue upper surface direct heating combustion air; Can combustion air temperature be warming up to more than 200 ℃ by 50 ℃, make the heat of flue gas directly return molten glass in the kiln, the 40-60% of recyclable flue gas heat; Fuel economy 8-15% reaches the purpose of energy-saving and emission-reduction.

Description of drawings

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

Fig. 1 is the transverse section structural map of the utility model

Fig. 2 is the combustion air piping layout

Among Fig. 1: 1. combustion air pipeline blowing air, 2. heat transfer tube, 3. thermal insulation layer, 4. the common surface of combustion air pipeline and flue is the combustion air pipeline above the common surface, is flue below.5. insulating brick, 6. refractory brick, 7. logical hot flue gas, 8. concrete foundation of flue.

Among Fig. 2: 1. are combustion air main pipe lines, are the rectangular ring structure.2. combustion air small transfer line.A, B are combustion air main pipe line air operated reversing valves, and A 1, A 2, A 3, A 4, A 5, A 6, A 7 are pneumavalves on the A side combustion air small transfer line; B 1, B 2, B 3, B 4, B 5, B 6, B 7 are pneumavalves on the B side combustion air small transfer line.

Embodiment

The two is at a distance of more than 2 meters before flue and the combustion air pipeline modification, and flue gas and combustion air do not have heat transfer relation; With flue and combustion air pipeline modification; The two unites two into one, and cross-sectional configuration is designed to: day font structure (like Fig. 1 type), and the end face of flue is the bottom surface of combustion air pipeline; The two shared this face; Form up and down two independently body structure passages, below the logical flue gas of casing, above the logical combustion air of casing; It is original design that flue bottom surface and two sides materials for wall keep, and cross sectional area increases by 80% on original design basis; Combustion air pipeline end face and two sides are with 3mm Plate Steel weldering system; Outside surface adds the thick lagging material of 20mm; Cross sectional area increases by 80% on original design basis; Combustion air pipeline two dimensional structure transform rectangular ring structure (like Fig. 2 type) as, and combustion air main pipe line air operated reversing valve A, B change incorgruous on-off control into, opens the A side valve when opening B side valve, kiln B side fire during kiln A side fire; Corresponding port is installed pneumavalve: A 1, A 2, A 3, A 4, A 5, A 6, A 7 on the combustion air A side branch road; Corresponding port is installed pneumavalve: B 1, B 2, B 3, B 4, B 5, B 6, B 7 on the combustion air B side branch road; The port pneumavalve is an on-off control in the same way, and all pneumavalves are controlled switching-over automatically by changing ignition system.Common surface adopts the thick stainless steel plate weldering of 4mm system to form; Guarantee that two passages do not have gas leak phenomenon up and down, on common plane, every square metre 25 heat transfer tubes (like Fig. 1 type) are installed, heat transfer tube and stainless steel plate adopt full weld to be tightly connected; Last lower box is stopped gas leakage; Continuously the heat of flue gas is conducted to combustion air jointly by common surface and heat transfer tube, heat is directly taken back in the kiln, accomplish heat exchange and reclaim the energy by combustion air.

Claims

1. heating combustion air glass furnace on the flue is characterized in that: flue and combustion air pipeline group integrator are body structure about the day font; Lower box is the logical hot flue gas of flue; Upper box is a combustion air pipeline blowing air, and the heat of flue gas conducts heat to combustion air through last lower box common surface and heat transfer tube, makes the combustion air heat temperature raising; Heat is directly taken back in the kiln molten glass.

2. according to heating combustion air glass furnace on the said flue of claim 1, it is characterized in that: synthetic day font casing of flue and combustion air pipeline group, casing integral body all adds insulation.

3. according to heating combustion air glass furnace on the said flue of claim 1, it is characterized in that: the combustion air pipeline is the rectangular ring two dimensional structure.

4. according to heating combustion air glass furnace on the said flue of claim 1, it is characterized in that: combustion air main pipe line air operated reversing valve A, B are incorgruous on-off control, open the A side valve when opening B side valve, kiln B side fire during kiln A side fire, control switching-over automatically by changing ignition system.

5. according to heating combustion air glass furnace on the said flue of claim 1; It is characterized in that: corresponding port is installed pneumavalve: A1, A2, A3, A4, A5, A6, A7 on the combustion air A side branch road; Corresponding port is installed pneumavalve: B1, B2, B3, B4, B5, B6, B7 on the combustion air B side branch road; The port pneumavalve is an on-off control in the same way; Drive A1, A2, A3, A4, A5, A6, A7 valve during kiln A side fire, drive B1, B2, B3, B4, B5, B6, B7 valve during kiln B side fire, control switching-over automatically by changing ignition system.

6. according to heating combustion air glass furnace on the said flue of claim 1, it is characterized in that: the installation heat transfer tube conducts the heat of flue gas to combustion air on flue and the combustion air pipeline casing common surface stainless steel plate.