CN112268462B - Preparation method of multi-element combined energy-saving device - Google Patents
Preparation method of multi-element combined energy-saving device Download PDFInfo
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- CN112268462B CN112268462B CN202011357359.6A CN202011357359A CN112268462B CN 112268462 B CN112268462 B CN 112268462B CN 202011357359 A CN202011357359 A CN 202011357359A CN 112268462 B CN112268462 B CN 112268462B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/16—Making or repairing linings increasing the durability of linings or breaking away linings
- F27D1/1678—Increasing the durability of linings; Means for protecting
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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Abstract
The invention relates to a preparation method of a multi-element combined energy-saving device, which comprises the following steps of a, preparing a temperature-resistant high-radiation material mixture; b. c, using 70% of mullite corundum powder as a base material, adding the high-temperature high-radiation material mixture prepared in the step a, and forming a rectangular arc herringbone groove or a rectangular wave groove and an arc rectangular guide angle plate blank by using a friction press; c. drying in a tunnel dryer; d. putting the rectangular arc herringbone groove or the rectangular wave-shaped groove and the arc rectangular guide angle plate blank into a tunnel kiln for sintering; e. and naturally cooling to normal temperature. The combined energy-saving device formed by mutually combining and using the energy-saving plate and the guide angle plate, which is prepared by adopting the technical scheme, is stably installed in the furnace and is not easy to fall off, the heat exchange of the hearth is obviously enhanced, the heating speed of the hearth is greatly improved, the purposes of reducing energy consumption and saving energy are achieved, the furnace lining material is protected, and the service life of the furnace is prolonged.
Description
Technical Field
The invention relates to the field of energy conservation of industrial furnaces, in particular to a preparation method of a multi-element combined energy-saving device.
Background
At present, in order to improve the heat efficiency of the industrial heating furnace, the commonly adopted energy-saving technologies are single, and no technology can comprehensively solve the problem of high energy consumption of the industrial furnace. The technology can improve the blackness of lining materials of the hearth to a certain extent, but is limited, the energy saving rate is about 5%, and the service life is within one year; there is also a method of sticking a fiber blanket on the inner wall of the hearth. The method can only block heat energy in the hearth to play a role in reducing heat dissipation loss, does not solve the problem that heat rays in the furnace are in a diffuse reflection state, has low arrival rate of the heat rays and low blackness of fiber materials, and can correspondingly reduce the blackness when the temperature of the furnace rises, so that the energy saving rate is not high. In recent years, cavity type single or multiple prefabricated members have appeared, and the materials of the prefabricated members are sprayed by using common refractory materials. If the semi-closed cavity fire-resistant prefabricated member of honeycomb formula, by a plurality of cavity disjunctors constitution, the prefabricated member is bigger than normal, the weight is partially, the cavity part is too high, the cavity is towards the part in the stove even direct contact to flame, receive strong hot gas flow to erode, some cavity fracture, it is serious wholly to drop, the construction degree of difficulty is big, glue mud and the bonding of stove inner wall that singly leans on the cavity bottom, can not adapt to the operational environment of strong air current far away, once having to drop and taking place, whole prefabricated member has just lost the effect almost, when serious even the furnace temperature does not rise operating temperature and just takes place to drop. Greatly influencing the energy-saving transformation effect. In addition, the prefabricated member is made of a common refractory material, the emissivity of the prefabricated member is about 0.5, elements for improving the blackness are not added to the base body, the blackness of the base body is improved by spraying the surface of the base body, the service life of the prefabricated member is short, and the energy-saving reconstruction effect cannot be achieved.
Disclosure of Invention
The present invention has been made in view of the above and/or other problems occurring in the prior art.
The invention aims to provide a preparation method of a multi-element combined energy-saving device, and aims to solve the problems that the energy-saving device prepared by the existing preparation process of the energy-saving device of an industrial kiln is easy to age, attenuate and fall off, and has poor energy-saving effect.
In order to solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions: the preparation method of the multi-element combined energy-saving device comprises the following steps:
a. preparing a high-temperature-resistant high-radiation material mixture: according to the weight, 2-6 parts of silicon carbide, 5-8 parts of chromium trioxide, 4-8 parts of manganese dioxide, 2-4 parts of iron trioxide, 2 parts of silica sol and 2 parts of rare earth raw materials are fully stirred and mixed, and then high-temperature sintering at 1300-1500 ℃ is carried out for 4 hours, so as to obtain a high-temperature-resistant high-radiation material mixture;
b. using 70% of mullite corundum powder as a base material, adding 30% of the high-temperature-resistant high-radiation material mixture prepared in the step a, and respectively forming an energy-saving plate blank body with a plurality of sequentially arranged arc herringbone grooves or arc wavy grooves and an arc rectangular guide angle plate blank body with a plurality of sequentially arranged arc herringbone grooves by using a friction press with the pressure of 300 tons, wherein one surface of each formed blank body with the arc herringbone grooves or the arc wavy grooves is a front surface, and the front surface is smooth and the back surface is rough; five fixed mounting holes are formed in the energy-saving plate blank which is subjected to press forming, wherein four holes are side holes, and one hole is a central hole;
c. b, placing the energy-saving plate blank body guide angle plate blank body obtained in the step b into a tunnel dryer for drying treatment, setting the inlet temperature of the tunnel dryer to be 40-50 ℃, setting the highest drying temperature in the tunnel dryer to be 130 ℃, and drying for 48 hours to obtain a blank body with the water content of less than or equal to 1.5 percent after drying;
d. c, placing the energy-saving plate blank body guide angle plate blank body obtained in the step c into a tunnel kiln for sintering, wherein the sintering temperature is 1550 ℃, the sintering heat preservation time is 10 hours, and the volume density obtained after sintering is 2.7g/cm 3 The energy-saving plate and the guide angle plate with blackbodies, high temperature resistance and high radiation resistance have the compression strength of 5 to 15Mpa;
e. and d, taking the energy-saving plate and the guide angle plate obtained by sintering in the step d out of the tunnel kiln after heat preservation for 10 hours, and naturally cooling the energy-saving plate and the guide angle plate to the normal temperature to obtain a finished product of the energy-saving plate and the guide angle plate.
f. E, sequentially and tightly connecting and fixedly mounting the energy-saving plates obtained in the step e on the inner wall of the kiln, mounting a guide angle plate at an included angle between the top of the kiln and the kiln wall or between the end wall and the side wall, and enabling an opening of the guide angle plate to be opposite to the center of the hearth;
two ends of the guide angle plate are provided with two fixed mounting plates along the tangential direction of the end edge of the cambered surface and inwards inclined by 15 to 30 degrees, the fixed mounting plates and the guide angle plate are connected into a whole, the fixed mounting plates and the guide angle plate are consistent in width, the width is set to be 30 to 60cm, and 4 to 6 mounting plate fixing holes are formed in the fixed mounting plates;
the energy-saving plate and the guide angle plate are bonded and sintered with the inner wall of the furnace into a whole by using high-temperature cement paste, and the energy-saving plate and the guide angle plate are fixedly installed by using ceramic screws through the fixing installation holes and the installation plate fixing holes;
the energy-saving plate and the guide angle plate are bonded and sintered with the inner wall of the furnace into a whole by high-temperature cement paste, and the energy-saving plate and the guide angle plate are fixedly installed by ceramic screws through the fixing and installing holes and the installing plate fixing holes.
The further technical scheme of the invention is as follows: the minimum distance between the side hole and the edge of the energy-saving plate blank is more than or equal to 10cm, the diameter of the side hole is 3-5 mm, the central hole is located in the center of the energy-saving plate, and the diameter of the central hole is 5-8 mm, so that the installation of the finished energy-saving plate is facilitated, and the stability of the energy-saving plate in the furnace is improved.
The invention further adopts the technical scheme that: the arc diameter of a plurality of arc herringbone grooves or arc wavy grooves on the energy-saving plate blank body ranges from 1 to 2cm, and the distance between the grooves ranges from 1 to 2cm.
The further technical scheme of the invention is as follows: the length of the energy-saving plate blank is 30 to 60cm, the width is 20 to 30cm, and the thickness is 2 to 5cm.
The invention further adopts the technical scheme that: the blank of the guide angle plate is a blank with an arc surface and a thickness of 2 to 5cm, the arc diameter of the arc surface of the blank is 10 to 30cm, and the blank is reasonable in design and convenient to use and install.
The invention further adopts the technical scheme that: the minimum distance between the mounting plate fixing hole and the edge of the fixed mounting plate is not less than 10cm, the diameter of the mounting plate fixing hole 32 ranges from 3 mm to 5mm, the arrangement position effect is good, and the firmness is effectively improved.
The further technical scheme of the invention is as follows: the mounting plate fixing holes are divided into two rows, the row spacing is 8-12cm, the layout is reasonable, and the stability is improved.
The further technical scheme of the invention is as follows: still include with the resistant high temperature fiber of direction scute cooperation use, resistant high temperature fiber fills the direction scute back effectively gets rid of the heat dissipation region, improves energy-conserving effect.
The invention has the beneficial effects that:
1. the energy-saving plate and the guide angle plate are combined into a combined energy-saving device which is respectively arranged at the proper part of the inner wall of the furnace, the inner surface and the outer surface of the energy-saving device form new effective radiation surfaces, the radiation area is increased, the energy-saving plate arranged on the radiation wall of the lining of the furnace forms a new radiation surface vertical to the radiation wall surface of the furnace wall, the inner surface area of a hearth is increased, the furnace surrounding opening degree is improved, meanwhile, the corresponding volume of the original design of the hearth is properly reduced, the fuel put into the hearth in unit time is correspondingly reduced, and the total heat released by the energy-saving plate is correspondingly increased; the guide angle plate is fixedly installed at the included angle position in the furnace, and after the guide angle plate is flatly paved on the top of the furnace lining material and the furnace wall, the directional emission of infrared rays is formed, the arrival rate and the irradiance of heat rays are improved, the radiation heat transfer is enhanced, and the problem that the heat rays at the included angle in the furnace are seriously lost, which cannot be solved by the existing furnace energy-saving technology, is solved;
2. the invention adds the mixture with higher blackness into the base material, improves the emissivity of the heat radiation, so as to adapt to the spectrum change in the furnace, and the energy-saving device is made of high-temperature heat-resistant material, so that the energy-saving device is not aged at high temperature and the emissivity of the radiation is not changed in a long-term high-temperature state.
3. The energy-saving plate and the guide angle plate are bonded and sintered with the inner wall of the furnace into a whole by high-temperature cement paste, and the energy-saving plate and the guide angle plate are fixedly installed by ceramic screws through the fixed installation holes and the installation plate fixing holes, so that the installation is firm, and the energy-saving plate and the guide angle plate do not fall off after being normally used for 10 years.
Drawings
FIG. 1 is a schematic view of the combined energy saving device of the present invention installed in a kiln;
FIG. 2 is a schematic structural diagram of the energy-saving plate with arc herringbone grooves of the invention;
FIG. 3 is a schematic structural diagram of the energy-saving plate with arc wave-shaped grooves according to the present invention;
FIG. 4 is a schematic view showing the construction of the guide gusset of the present invention;
reference numerals:
1-kiln, 2-energy-saving plate, 21-arc herringbone groove, 22-fixed mounting hole, 23-arc wave groove, 3-guide angle plate, 31-fixed mounting plate, 32-mounting plate fixing hole and 4-high temperature resistant fiber.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
The first embodiment is as follows:
the preparation method of the multi-element combined energy-saving device comprises the following steps:
a. preparing a high-temperature-resistant high-radiation material mixture: according to the weight, 2-6 parts of silicon carbide, 5-8 parts of chromium trioxide, 4-8 parts of manganese dioxide, 2-4 parts of iron trioxide, 2 parts of silica sol and 2 parts of rare earth raw materials are fully stirred and mixed, and then high-temperature sintering at 1300-1500 ℃ is carried out for 4 hours, so as to obtain a high-temperature-resistant high-radiation material mixture;
b. using 70% of mullite corundum powder as a base material, adding 30% of the high-temperature-resistant high-radiation material mixture prepared in the step a, and respectively forming an energy-saving plate blank body with a plurality of sequentially arranged arc herringbone grooves 21 or arc wavy grooves 23 and an arc rectangular guide angle plate blank body with a plurality of sequentially arranged arc herringbone grooves 21 by using a friction press with the pressure of 300 tons, wherein one surface of each formed blank body with the arc herringbone grooves 21 or the arc wavy grooves 23 is a front surface, and the front surface is smooth, and the back surface is rough; five fixed mounting holes 22 are formed in the energy-saving plate blank 2 which is formed by pressing, wherein four holes are side holes, and one hole is a central hole;
c. b, placing the energy-saving plate blank body guide angle plate blank body obtained in the step b into a tunnel dryer for drying treatment, setting the inlet temperature of the tunnel dryer to be 40-50 ℃, setting the highest drying temperature in the tunnel dryer to be 130 ℃, and drying for 48 hours to obtain a blank body with the water content of less than or equal to 1.5 percent after drying;
d. c, placing the energy-saving plate blank body guide angle plate blank body obtained in the step c into a tunnel kiln for sintering, wherein the sintering temperature is 1550 ℃, the sintering heat preservation time is 10 hours, and the volume density obtained after sintering is 2.7g/cm 3 The energy-saving plate 2 with black body high-temperature resistance and high radiation resistance and the guide angle plate 3 with the compressive strength of 5 to 15Mpa;
e. d, taking the energy-saving plate and the guide angle plate obtained by sintering in the step d out of the tunnel kiln after preserving heat for 10 hours, and naturally cooling the energy-saving plate and the guide angle plate to normal temperature to obtain a finished product energy-saving plate 2 and a finished product guide angle plate 3;
f. e, sequentially and tightly connecting and fixedly mounting the energy-saving plates obtained in the step e on the inner wall of a kiln 1, mounting a guide angle plate 2 at an included angle between the top of the kiln and a furnace wall or between an end wall and a side wall, and aligning an opening of a guide angle plate 3 to the center of a hearth;
two fixed mounting plates 31 are arranged at two ends of the guide angle plate 3 along the tangential direction of the end edge of the arc surface and inwards inclined by 15 to 30 degrees, the fixed mounting plates 31 and the guide angle plate 3 are connected into a whole, the fixed mounting plates 31 and the guide angle plate 3 are consistent in width, the width is set to be 30 to 60cm, and 4 to 6 mounting plate fixing holes 32 are arranged on the fixed mounting plates 31;
the energy-saving plate 2 and the guide angle plate 3 are bonded and sintered with the inner wall of the furnace into a whole by high-temperature cement, and the energy-saving plate 2 and the guide angle plate 3 are fixedly installed by ceramic screws through the fixed installation holes 22 and the installation plate fixing holes 32.
According to the process steps, the energy-saving plate with the arc herringbone-shaped grooves shown in the figure 2 or the energy-saving plate with the arc wavy-shaped grooves shown in the figure 3 and the guide angle plate shown in the figure 4 can be prepared;
preferably, the minimum distance between the side holes and the edge of the blank is more than or equal to 10cm, the diameter of each side hole is 3-5 mm, the safety distance of more than 10cm is reserved, when the ceramic screw is installed, the part is effectively prevented from being damaged, one side hole is a central hole, the central hole is located in the center of the energy-saving plate, the diameter of the central hole is 5-8 mm, the installation of the finished energy-saving plate 2 is facilitated, and the stability of the energy-saving plate 2 in the furnace is improved.
Preferably, the arc diameters of the arc herringbone grooves or the arc wavy grooves on the energy-saving plate blank body are 1 to 2cm, the distance between the grooves is 1 to 2cm, the diameter of the arc grooves is controlled to be 1 to 2cm, the distance between the grooves is 1 to 2cm, the density arrangement design achieves an ideal state, and when the kiln is heated, the arc grooves absorb reflected heat radiation rays, so that the temperature in the kiln is rapidly increased.
Preferably, the length of the energy-saving plate blank is 30 to 60cm, the width is 20 to 30cm, the thickness is 2 to 5cm, the size of the energy-saving plate is suitable and not too large or too small, the energy-saving plate is convenient to use and install, and meanwhile, due to the design of the thickness of the energy-saving plate, the energy-saving plate is not too high after being installed on the wall of the furnace, the degree of the energy-saving plate being washed by airflow or flame in the furnace can be effectively reduced, and the energy-saving plate can also be prevented from occupying too much space in the furnace.
Preferably, the blank of the guide angle plate is a blank with an arc surface and a thickness of 2-5 cm, the arc diameter of the arc surface of the blank is 10-30cm, and the blank is reasonable in design and convenient to use and install.
Preferably, the included angle part comprises an included angle between the end wall and the side wall and an included angle of the inner wall of the furnace.
Preferably, the minimum distance between the fixed mounting hole 32 and the edge of the fixed mounting plate 31 is not less than 10cm, the diameter of the fixed mounting hole 32 is 3-5 mm, the arrangement position effect is good, and the firmness is effectively improved.
Preferably, the mounting plate fixing holes 32 are divided into two rows, the row spacing is 8-12cm, the layout is reasonable, and the stability is improved.
Preferably, the guide angle plate also comprises high-temperature-resistant fibers 4 matched with the guide angle plate, and the high-temperature-resistant fibers 4 are filled in the back of the guide angle plate 3, so that a heat dissipation area is effectively removed, and the energy-saving effect is improved.
In the technical field of steel smelting, according to the heat transfer model theory of a heating furnace, the increase degree of the total heat transfer area determines the increase degree of the heating capacity of a hearth, and under the condition of increasing the surface area of the inner part of the hearth by one time, namely increasing the furnace circumference extension degree by one time, the heating capacity of a billet in a unit time period is improved by more than 15 percent, so that the method is one effective way for realizing energy conservation and emission reduction, and an arc herringbone groove or an arc wave groove is arranged on the front side of an energy-saving device, namely one end facing a heated workpiece of the hearth. The heat transfer area of the hearth can be obviously increased, so that the furnace enclosure extension degree is further improved, and the energy-saving reconstruction effect of the heating furnace is improved.
In the design of an industrial furnace, after the size of a hearth is determined, the area of the inner wall of the furnace is correspondingly determined, and if the area of the inner lining of the furnace is increased to strengthen heat transfer, the fuel consumption in unit time is obviously reduced; therefore, the front surface of the energy-saving plate, namely one end facing to the heated workpiece of the hearth, is provided with the arc herringbone groove or the arc wave-shaped groove, so that the surface of the energy-saving plate is obviously concave-convex, the aim of increasing the inner surface area of the hearth is fulfilled, namely the furnace enclosure opening degree is improved to enhance the heat exchange of the hearth, the heating speed of the hearth is improved, the energy consumption is reduced, and the heating quality and the yield of the heated workpiece are improved.
In the technical scheme, the energy-saving plate and the energy-saving plate are combined with each other, the guide angle plate and the guide angle plate are combined with each other, the energy-saving plate and the guide angle plate are combined to form a combined energy-saving device which is arranged in a kiln and is formed by combining a plurality of units, the units are all made of high-heat-storage refractory materials, materials with higher blackness are added according to percentage to be fully stirred, then the materials are cast, sintered and formed by mechanical pressure or isostatic pressure, and the combined energy-saving device with a black body, high heat storage, high emissivity, strong thermal shock resistance, good thermal stress resistance and strong impact resistance is manufactured, so that the heat efficiency of the kiln is effectively improved.
For a fuel furnace, hot air flows in the furnace continuously and contacts with the inner wall of the furnace in the circulating process, when the hot air flows to an included angle between the furnace top and the furnace wall and between the end wall and the side wall, pit flow and slow flow are generated, and the diffused heat ray is finally dissipated through the furnace wall. Because the part of heat rays can not be absorbed by the heated workpiece, the difference between the central temperature and the side source temperature in the furnace is 60 to 100 ℃, the workpiece is not heated uniformly, in order to ensure that all parts of the workpiece reach the required temperature, the only method at the moment is to continuously increase the fuel in the furnace to strengthen the combustion, thus the steel pause energy consumption is increased. The guiding angle plate has the effects that the diffuse radiation heat rays from all directions are absorbed by the arc herringbone grooves and are quickly transmitted to the whole guiding angle plate, and after the guiding angle plate fully stores heat, the guiding angle plate is emitted into the furnace and finally absorbed by a workpiece. Because the directional emission of infrared rays is formed, the arrival rate and irradiance of heat rays are improved to the maximum extent, and the radiation heat transfer is enhanced, so that the energy saving rate of the fuel is improved by 12-20%.
The inner surface and the outer surface of the energy-saving device form new effective radiation surfaces, and the radiation area is increased. The strong heat radiation energy-saving device arranged on the furnace lining radiation wall forms a new radiation surface vertical to the radiation wall surface. The guide angle plate is fixedly arranged at the included angle part in the furnace, so that the problem of serious heat ray loss of the included angle in the furnace, which cannot be solved by the existing furnace energy-saving technology, is solved. After the combined energy-saving device is paved on the top of the furnace lining material and the furnace wall, the corresponding volume of the original design of the hearth is properly reduced, the fuel put into the hearth in unit time is correspondingly reduced, and the total heat released by the fuel is correspondingly increased, so that the energy consumption is reduced, the aim of saving energy is fulfilled, the furnace lining material is protected, and the service life of the furnace is prolonged. According to the infrared physical theory, the surface of the object is arc-shaped, so that more heat rays can be absorbed conveniently, when the heat rays which cannot do work in the furnace are absorbed by the surface of the energy-saving device, the heat rays rapidly enter the base body, complete sufficient heat storage through repeated radiation in the base body and the arc herringbone groove, and then perform directional radiation to the furnace through the herringbone groove. When the temperature of the energy-saving device rises to be higher than the process temperature in the furnace by more than 20 ℃, the emitted wave spectrum starts to be concentrated to an infrared short wave spectrum, the wavelength is 3 to 2000 micrometers, the cold and hot cyclicity is good, generally, the wave spectrum about 1 to 5UM accounts for 76 percent of the whole wave spectrum, in the wave spectrum range, the wave spectrum is basically the same as the absorption frequency of a workpiece, the wave spectrum can be more effectively absorbed by the workpiece, the heat efficiency (similar to the property of a light wave furnace, namely electromagnetic waves) is improved, and when the temperature difference becomes small and reaches the heat balance, the absorption and the emissivity of the furnace lining are basically the same. The invention adds the mixture with higher blackness into the base material to improve the emissivity of the base material so as to adapt to the spectrum change in the furnace.
The energy-saving plates and the guide angle plates are fixedly arranged on the furnace lining material, so that the heat loss of the furnace lining material is correspondingly reduced, the temperature of the outer surface of the hearth is reduced by 10 to 60 ℃, and the central temperature of the hearth can be increased by 20 to 100 ℃. The direct contact between the furnace lining material and the hearth material is reduced, the possibility of corrosion and scouring is reduced, the furnace temperature is stable, and the radiation wave bandwidth is stable and stable. Because the guide angle plate is arranged, the disordered heat rays with the included angle are changed into the ordered heat rays, the temperature in the furnace is uniformly distributed, the temperature control is accurate, the high temperature resistance and the thermal vibration resistance are good, and the service life of the furnace body can be prolonged.
As mentioned above, after the heat ray is regulated and controlled by the combined energy-saving device, the heat ray in the furnace directly irradiates to the heated workpiece, so that the arrival rate and auxiliary illumination of the heat ray are improved, the radiation heat transfer is enhanced, and the industrial heating furnace kiln can reach the following performance indexes:
1. the energy saving rate is 10 to 15 percent, the productivity of the furnace is improved by 10 to 20 percent, the vertical temperature difference of a hearth is reduced by about 60 percent, and the service life of a furnace lining is prolonged by more than one time.
2. Has environmental protection effect, and reduces the exhaust emission because the complete combustion of the fuel is strengthened.
3. The construction is simple, safe and reliable, the original furnace body does not need to be changed during the construction, the safe use of the furnace kiln is not influenced after the transformation, the original production and operation processes of the furnace are not changed, and the construction period is 5 to 8 days.
The above description is intended to be illustrative of the preferred embodiment of the present invention and should not be taken as limiting the invention, but rather, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.
Claims (8)
1. The preparation method of the multi-element combined energy-saving device is characterized by comprising the following steps:
a. preparing a high-temperature-resistant high-radiation material mixture: according to weight, 2-6 parts of silicon carbide, 5-8 parts of chromium trioxide, 4-8 parts of manganese dioxide, 2-4 parts of iron trioxide, 2 parts of silica sol and 2 parts of rare earth raw materials are fully stirred and mixed, and then are sintered at the high temperature of 1300-1500 ℃, wherein the sintering time is 4 hours, so that a high-temperature-resistant high-radiation material mixture is obtained;
b. using 70% of mullite corundum powder as a base material, adding 30% of the high-temperature-resistant high-radiation material mixture prepared in the step a, and respectively forming an energy-saving plate blank body with a plurality of sequentially arranged arc herringbone grooves or arc wave-shaped grooves and a guide angle plate blank body with an arc rectangular shape with a plurality of sequentially arranged arc herringbone grooves by using a friction press with the pressure of 300 tons, wherein one surface of each formed two blank bodies with the arc herringbone grooves or the arc wave-shaped grooves is a front surface, and the front surface is smooth and the back surface is rough; five fixed mounting holes are formed in the energy-saving plate blank which is subjected to press forming, wherein four holes are side holes, and one hole is a central hole;
c. b, placing the energy-saving plate blank body guide angle plate blank body obtained in the step b into a tunnel dryer for drying treatment, setting the inlet temperature of the tunnel dryer to be 40-50 ℃, setting the highest drying temperature in the tunnel dryer to be 130 ℃, and drying for 48 hours to obtain a blank body with the water content of less than or equal to 1.5 percent after drying;
d. c, placing the energy-saving plate blank body guide angle plate blank body obtained in the step c into a tunnel kiln for sintering, wherein the sintering temperature is 1550 ℃, the sintering heat preservation time is 10 hours, and the volume density obtained after sintering is 2.7g/cm 3 The high-temperature and high-radiation resistant energy-saving plate and the guide angle plate are made of black bodies with the compressive strength of 5 to 15Mpa;
e. d, taking the energy-saving plate and the guide angle plate obtained by sintering in the step d out of the tunnel kiln after preserving heat for 10 hours, and naturally cooling the energy-saving plate and the guide angle plate to normal temperature to obtain a finished product of the energy-saving plate and the guide angle plate;
f. e, sequentially and tightly connecting and fixedly mounting the energy-saving plates obtained in the step e on the inner wall of the kiln, mounting a guide angle plate at an included angle between the top of the kiln and the kiln wall or between the end wall and the side wall, and enabling an opening of the guide angle plate to be opposite to the center of the hearth;
two ends of the guide angle plate are provided with two fixed mounting plates along the tangential direction of the end edge of the cambered surface and inwards inclined by 15 to 30 degrees, the fixed mounting plates and the guide angle plate are connected into a whole, the fixed mounting plates and the guide angle plate are consistent in width, the width is set to be 30 to 60cm, and 4 to 6 mounting plate fixing holes are formed in the fixed mounting plates;
the energy-saving plate and the guide angle plate are bonded and sintered with the inner wall of the furnace into a whole by high-temperature cement paste, and the energy-saving plate and the guide angle plate are fixedly installed by ceramic screws through the fixed installation holes and the installation plate fixed holes.
2. The method for preparing the multi-unit combined energy-saving device according to claim 1, wherein the method comprises the following steps: the minimum distance between the side hole and the edge of the energy-saving plate blank is more than or equal to 10cm, the diameter of the side hole is 3-5 mm, the central hole is located in the center of the energy-saving plate, and the diameter of the central hole is 5-8 mm.
3. The method for preparing the multi-unit combined energy-saving device according to claim 1, wherein the method comprises the following steps: the arc diameter of a plurality of arc herringbone grooves or arc wavy grooves on the energy-saving plate blank body is 1 to 2cm, and the distance between the grooves is 1 to 2cm.
4. The method for preparing the multi-unit combined energy-saving device according to claim 1, wherein the method comprises the following steps: the length of the energy-saving plate blank is 30 to 60cm, the width is 20 to 30cm, and the thickness is 2 to 5cm.
5. The method for preparing the multi-unit combined energy-saving device according to claim 1, wherein the method comprises the following steps: the blank of the guide angle plate is a blank with an arc surface and the thickness of the blank is 2 to 5cm, and the arc diameter of the arc surface of the blank is 10 to 30cm.
6. The method for preparing the multi-unit combined energy-saving device according to claim 1, wherein the method comprises the following steps: the minimum distance between the mounting plate fixing hole and the edge of the fixed mounting plate is more than or equal to 10cm, and the diameter of the mounting plate fixing hole ranges from 3 mm to 5mm.
7. The method for preparing the multi-unit combined energy-saving device according to claim 6, wherein: the fixed mounting holes are divided into two rows, and the row spacing is 8 to 12cm.
8. The method for preparing the multi-unit combined energy-saving device according to claim 1, wherein the method comprises the following steps: the high-temperature-resistant fiber is filled in the back of the guide angle plate.
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