CN205473333U

CN205473333U - To spouting melting furnace that submerged combustion founded inorganic material

Info

Publication number: CN205473333U
Application number: CN201620073774.1U
Authority: CN
Inventors: 徐林波
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-01-26
Filing date: 2016-01-26
Publication date: 2016-08-17
Anticipated expiration: 2026-01-26

Abstract

The utility model provides a to spouting melting furnace that submerged combustion founded inorganic material, characterized by: this kind of melting furnace does not have top cap and breastwork, the only molten bath of bottom of the pool and pool wall constitution, on the corresponding position in molten bath top and melting furnace bottom, be equipped with the fuel nozzle and the combustion adjuvant spray tube that insert in the molten bath respectively to the orientation is relative, and blowout fuel and combustion adjuvant make it in the inside burning of meeting of liquation, reach the purpose that melts the material, at melting liquid upper surface, the bedding has the one deck to wait the raw materials cooperation bed of material that melts all the time, and the burning flue gas in the liquation is overflowed through this bed of material to drain after lowering the temperature with bed of material heat transfer, oxygen combustion is met to burning fuel of complete combustion not in the flue gas in the molten surface and the raw materials cooperation bed of material to for the heating of raw materials cooperation material, along with raw materials cooperation bed of material bottom constantly melts, the new bed of material is constantly spread to the top layer, and the melting furnace just can go out required liquation by continuous production.

Description

Spray submerged combustion is founded the melting furnaces of inorganic material

Technical field

Inorganic material founds melting furnaces.Particularly submerged combustion melting furnaces.

Background technology

Inorganic material, founding including glass, pottery, refractory material etc. is technique most important, most crucial in material fabrication process.Its quality workmanship for environmental protection, energy-saving and emission-reduction and material and the height of cost, have very important effect.

As a example by glass smelting: at present, all use surface heated method with fuel continuous melting vitreous humour.It has several shortcoming being difficult to and overcoming: one is that the thermal efficiency is relatively low, and thermal losses is serious；Two is that melting rate is relatively low；Three is that the fuel gas temperature of melting tank combustion space is high, flow velocity big, very fast to kiln refractory corrosion, reduces kiln service life.In order to save the energy, reduce discharge and reduce cost and improve kiln service life, the most all replace surface heating, such as submerged combustion and heated by electrodes exploring more effective heating means.

But, up to now, so-called submerged combustion is to insert in kiln by gaseous fuel combustion device from kiln bottom, the waste gas making burning is injected directly in the vitreous humour of molten bath with high temperature and high speed, stir vitreous humour, and major part heat is passed to vitreous humour and batch, make frit melt rapidly.

This method not only can make the heat of burning gases be fully absorbed by vitreous humour, heat loss is little, melting rate is high, energy-saving effect very notable (abroad introduce the melting rate of submerged combustion method up to 9 ~ 10 ton/square metre days, per kilogram vitreous humour heat consumption is at 1000 ~ 1300 kilocalories).And owing to high-temperature gas seethes, vitreous humour is played stirring action, make the vitreous humour in pond evenly.The most identical with the temperature of Watch glass liquid in molten bath owing to leaving the EGT of vitreous humour again, thus reduce the temperature in melting furnaces space, extend the service life of kiln.

Submerged combustion method has many advantages, and therefore the U.S. including China, day, method, E Deng state all successively conduct in-depth research and test, but do not succeed in large-scale industrial application.

Its reason is, the method of this tradition submerged combustion has insoluble problem: 1, clear up problems: when spraying into combustion gas and air mixture in vitreous humour (combustion product), the operating condition of nozzle is relatively difficult, when only mixed gas consumption substantially exceeds and embraces with air or dry drum, found and just can be normally carried out.Owing to the fierce bubbling of vitreous humour seethes, making vitreous humour show bubble, the minute gas field trash of self significantly increases, and therefore, makes vitreous humour clarification highly difficult.2, fuel problem: occlusion or the blub composition that is mingled with mainly do not participate in the inactive gas of reaction in the melt, the nitrogen namely discharged in fuel combustion process, as: in combustion product produced by with the submerged combustion nozzle of natural gas one air gas mixture, nitrogen content is more than 70%, general combustion method then allows the nitrogen content in combustion product less than 30%, for plate glass, then preferably no more than 10% (weight).Therefore, this is also the main cause that air inclusions are many.Can effectively solve above-mentioned two problems by pure oxygen burning technique, but the problem brought is that flame temperature is too high, nozzle deteriorates too fast, cannot compensate or change again.3, combustor problem: due to burner be submergence in the melt, its quality, riding position and operation control to require the most than ever strict, and otherwise, once burning is broken down, and make vitreous humour enter people's solidification in it, then can not be continuing with.It addition, when vitreous humour reaches certain depth, the impulse force of nozzle is inadequate, flame does not the most enter vitreous humour, and refractory material sprays from the side.Qinhuangdao Glass Inst. the most just ran into this situation.Reduce nozzle diameter and can solve the problems referred to above, but the problem that calory burning is not enough can be caused.4, refractories: owing to vitreous humour acutely seethes in kiln, the vitreous humour that can be splashed out in superstructure space washes away, and general silica brick and chrome brick do not adapt to the needs of this melting furnaces.When arranging multiple burner noz(zle) at the bottom of pond, also weakening the intensity of refractory material.It addition, such as burn in liquation, natural gas (for the 7-10% of total amount in infeed kiln), can make heat exchange be greatly reinforced.Improving the directly amount of natural gas of burning in melting furnaces too much, refractory material is serious by erosion.5, the fluctuation of vitreous humour viscosity, bleed pressure and flow, the impact on mixture pressure and spray speed is the biggest so that it is be maintained in vitreous humour burning with being difficult to long term constant, easily causes de-fire or tempering phenomenon.6, the most key problem is: owing to being limited by material, and burner (especially bocca) is easily lost, the life-span is shorter, and both cannot compensate and also be difficult to change.So while through long-term research and test, be but difficult to put into actual application.And heated by electrodes there is the problem that melting rate is low；Heating surface (area) (HS is limited；Electrode is expensive and changes difficult and oxidizable；After first glass melting need to being become liquid with other mode of heating, can electrified regulation, add equipment and process costs.Therefore.The glass electric melting of heated by electrodes is only used for the production of the product on a small scale such as high-boron-silicon glass, opal glass at present.

Summary of the invention

For solving the problems referred to above, the invention provides a kind of melting furnaces that spray submerged combustion is founded inorganic material, it is characterized in that: the molten bath that this melting furnaces do not have at the bottom of top cover and breastwork, only pond and pool wall is constituted；Bottom top, molten bath and melting furnaces on opposite position, it is respectively equipped with the fuel nozzle and combustion adjuvant jet pipe inserted in molten bath, and direction is relative, ejection fuel and combustion adjuvant so that it is burning of meeting inside liquation, reach the purpose of melting materials；At melt liquid upper surface, bedding has one layer of raw materials batch layer fusion all the time, and the combustion product gases in liquation escapes through this bed of material, and by draining after lowering the temperature with bed of material heat exchange；Fuel imperfect combustion in combustion product gases, meets oxygen combustion in molten surface and raw materials batch layer, and heats to raw materials batch；Along with raw materials batch layer bottom constantly melts, top layer constantly spreads the new bed of material, and melting furnaces just can continuously produce required liquation.

Above-mentioned fuel nozzle or combustion adjuvant jet pipe can replace bottom top, molten bath and melting furnaces.When fuel nozzle is arranged on top, molten bath, just corresponding bottom melting furnaces position arranging combustion adjuvant jet pipe, vice versa.

Above-mentioned fuel can be gaseous fuel, liquid fuel or powder fuel.

Above-mentioned combustion adjuvant can be air, oxygen-enriched or pure oxygen gas.

Above-mentioned raw materials coordinates the THICKNESS CONTROL of the bed of material can low pressure effusion to be advisable at combustion product gases.

Above-mentioned fuel nozzle and combustion adjuvant jet pipe should organize arrangement more, are arranged at the middle section away from molten bath pool wall.

For ensureing that fuel burns completely, above-mentioned fuel nozzle can be corresponding with non-equivalent isometrical, non-with combustion adjuvant jet pipe.

The above-mentioned inorganic material founded is glass.

The above-mentioned inorganic material founded is limestone.

The above-mentioned inorganic material founded is ceramic material.

The above-mentioned inorganic material founded is refractory material.

Above-mentioned molten bath top lance is designed to can freely up and down Transfer tectonics；Thus regulate combustion efficiency, make fuel burn completely as far as possible.

The jet pipe inserted from kiln crown, inserts in liquation through raw materials batch layer.And compensation can be continuously available after being etched or change.

The jet pipe inserted from kiln bottom, does not expose kiln bottom refractory surface in case being etched.It need not compensate or change, and will use for a long time with the life-span with melting furnaces.

Other submerged combustion method is compared, this spray submerged combustion is founded the method for inorganic material and melting furnaces thereof have the beneficial effect that 1, kiln and combustion apparatus simple in construction, service life is long；2, method is reliable, and burning is completely；3, melting efficiency is high, and liquation homo-effect is good；4, the erosion to refractory material is little；5, high-temperature flue gas heat-exchange time in liquation and raw materials batch layer is long, and heat utilization efficiency is high；6, it is suitable for pure oxygen high-temp combustion, is possible not only to melt high-melting-point material, and exhaust gas volumn is greatly reduced, the beneficially clarification of liquation；7, there is great effects of energy saving and emission reduction.

Accompanying drawing explanation

Fig. 1 is one of embodiment of the present invention cross-section structure schematic diagram.

1. kiln bottom refractory material, 2. kiln bottom jet pipe, 3. kiln crown jet pipe, 4. melt liquid, 5. combustion product gases path, 6. liquation liquid level, 7. raw materials batch layer in figure.

Detailed description of the invention

In Fig. 1, by fuel nozzle and combustion adjuvant jet pipe bottom the top, molten bath and melting furnaces of melting furnaces, opposite position inserts molten bath respectively, and direction is relative, ejection fuel and combustion adjuvant, make its burning of meeting in melt liquid (4) inside, thus reach the purpose of melting materials；Upper surface in melt liquid (4), all the time bedding has one layer of raw materials batch layer (7) fusion, combustion product gases in liquation, escapes along combustion product gases path (5) through raw materials batch layer (7), and by draining after lowering the temperature with raw materials batch layer (7) heat exchange；Fuel imperfect combustion in combustion product gases, meets oxygen combustion in molten surface (6) and raw materials batch layer (7), and heats to raw materials batch.

When starting melting materials, kiln bottom jet pipe (2) is the most relative with kiln crown jet pipe (3) spout, it is embedded in material fusion and ignition.Along with the fusing of material, being gradually increased expulsion pressure and the distance of upper and lower jet pipe, regulation fuel and combustion adjuvant meet the height and position of burning, until stable burning in melt liquid (4).

Along with raw materials batch layer bottom constantly melts, top layer constantly spreads the new bed of material, and melting furnaces just can continuously produce required liquation.

Claims

1. spray submerged combustion is founded melting furnaces for inorganic material, it is characterized in that: the molten bath that this melting furnaces do not have at the bottom of top cover and breastwork, only pond and pool wall is constituted；Bottom top, molten bath and melting furnaces on opposite position, it is respectively equipped with the fuel nozzle and combustion adjuvant jet pipe inserted in molten bath, and direction is relative, ejection fuel and combustion adjuvant so that it is burning of meeting inside liquation, reach the purpose of melting materials；At melt liquid upper surface, bedding has one layer of raw materials batch layer fusion all the time.

The most according to claim 1 a kind of the melting furnaces of inorganic material are founded in spray submerged combustion, it is characterized in that: above-mentioned fuel nozzle or combustion adjuvant jet pipe can alternate position, be arranged on top, molten bath and bottom.

A kind of melting furnaces that spray submerged combustion is founded inorganic material the most according to claim 1, is characterized in that: above-mentioned combustion adjuvant is oxygen-enriched or pure oxygen gas.

A kind of melting furnaces that spray submerged combustion is founded inorganic material the most according to claim 1, is characterized in that: the melt liquid in above-mentioned molten bath is glass.

A kind of melting furnaces that spray submerged combustion is founded inorganic material the most according to claim 1, is characterized in that: the melt liquid in above-mentioned molten bath is limestone.

A kind of melting furnaces that spray submerged combustion is founded inorganic material the most according to claim 1, is characterized in that: the melt liquid in above-mentioned molten bath is ceramic material.

A kind of melting furnaces that spray submerged combustion is founded inorganic material the most according to claim 1, is characterized in that: the melt liquid in above-mentioned molten bath is refractory material.

The most according to claim 1 a kind of the melting furnaces of inorganic material are founded in spray submerged combustion, it is characterized in that: above-mentioned molten bath top lance is designed to can freely up and down Transfer tectonics.

A kind of melting furnaces that spray submerged combustion is founded inorganic material the most according to claim 1, is characterized in that: the jet pipe inserted from kiln crown, are inserted in liquation through raw materials batch layer, and can be continuously available compensation after being etched or change.

A kind of melting furnaces that spray submerged combustion is founded inorganic material the most according to claim 1, is characterized in that: the jet pipe inserted from kiln bottom, not exposing kiln bottom refractory surface in case being etched.