CN108224422B - High-efficiency energy-saving gas type perlite expansion equipment - Google Patents
High-efficiency energy-saving gas type perlite expansion equipment Download PDFInfo
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- CN108224422B CN108224422B CN201810272323.4A CN201810272323A CN108224422B CN 108224422 B CN108224422 B CN 108224422B CN 201810272323 A CN201810272323 A CN 201810272323A CN 108224422 B CN108224422 B CN 108224422B
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- 235000019362 perlite Nutrition 0.000 title claims abstract description 43
- 239000010451 perlite Substances 0.000 title claims abstract description 43
- 239000007789 gas Substances 0.000 claims abstract description 242
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 150
- 239000003345 natural gas Substances 0.000 claims abstract description 75
- 238000002156 mixing Methods 0.000 claims abstract description 46
- 239000007921 spray Substances 0.000 claims abstract description 17
- 230000003197 catalytic effect Effects 0.000 claims description 71
- 239000007800 oxidant agent Substances 0.000 claims description 17
- 230000001590 oxidative effect Effects 0.000 claims description 12
- 239000011449 brick Substances 0.000 claims description 7
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 230000001276 controlling effect Effects 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 239000000446 fuel Substances 0.000 abstract description 11
- 239000003344 environmental pollutant Substances 0.000 abstract description 8
- 231100000719 pollutant Toxicity 0.000 abstract description 8
- 238000007254 oxidation reaction Methods 0.000 abstract description 6
- 238000004134 energy conservation Methods 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 5
- 239000003054 catalyst Substances 0.000 abstract description 4
- 239000002737 fuel gas Substances 0.000 description 29
- 238000002485 combustion reaction Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 230000001939 inductive effect Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000005422 blasting Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 238000005411 Van der Waals force Methods 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 238000003837 high-temperature calcination Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001007 puffing effect Effects 0.000 description 1
- 230000001846 repelling effect Effects 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/12—Radiant burners
- F23D14/18—Radiant burners using catalysis for flameless combustion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
-
- 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
- Y02P10/00—Technologies related to metal processing
- Y02P10/10—Reduction of greenhouse gas [GHG] emissions
- Y02P10/143—Reduction of greenhouse gas [GHG] emissions of methane [CH4]
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
Abstract
The invention discloses efficient and energy-saving gas type perlite expansion equipment, which comprises an expansion furnace body, a natural gas conveying pipeline, an air conveying pipeline and a gas burner, wherein the expansion furnace body is provided with a hearth, and the gas burner is arranged in the hearth; the gas burner comprises a gas mixing cavity and a gas spray head, wherein the gas mixing cavity is provided with a natural gas inlet, an air inlet and a mixed gas outlet, the natural gas conveying pipeline and the air conveying pipeline are respectively communicated with the gas mixing cavity through the natural gas inlet and the air inlet, and an air inlet pipe of the gas spray head is communicated with the mixed gas outlet. The invention ensures that the natural gas fuel and the air are fully mixed, and heterogeneous complete oxidation reaction is carried out on the surface of the catalyst, so that the thermal efficiency of the natural gas fuel is improved, and meanwhile, the pollution of polluted gas or pollutants such as NOx, CO, CH and the like is less generated, thereby meeting the requirements of high efficiency, energy conservation and environmental protection.
Description
Technical Field
The invention relates to perlite expansion equipment, in particular to high-efficiency and energy-saving gas type perlite expansion equipment.
Background
The expanded perlite has the characteristics of light apparent density, low heat conductivity coefficient, good chemical stability, wide use temperature range, small moisture absorption capacity, no toxicity, no smell, fire resistance, sound absorption and the like, and is widely applied to various industrial departments. The expanded perlite is a white granular light and multifunctional novel material with a honeycomb structure inside, which is prepared by preheating perlite ore sand by a preheating furnace, and carrying out instantaneous high-temperature roasting and expansion, and the principle is as follows: the method comprises the steps of crushing perlite ore to form perlite ore with a certain granularity, preheating and roasting the perlite ore by a reservation device, rapidly heating the perlite ore by an expansion furnace (more than 1000 ℃), so that moisture contained in the perlite ore is vaporized, and expanding the surface-softened perlite ore with a certain volume coefficient (10-30 times) outside and inside the perlite ore, thereby forming a white granular nonmetallic ore product with closed or open pores on the outer surface and a honeycomb structure inside. The prior perlite expansion furnace in China generally utilizes natural gas as energy source to provide a high-temperature heat source in the perlite expansion process so as to heat the hearth of the perlite expansion furnace to more than 1000 ℃.
However, natural gas as a clean fuel is used as a fuel to provide a high temperature heat source for the expansion process of perlite, and during the high temperature calcination of the perlite expansion furnace, the natural gas fuel burns to produce a large amount of greenhouse gas CO 2 At the same time, a small amount of polluted gas or pollutant such as NOx, CO and CH is generated, and the polluted gas such as NOx, CO and CH is adsorbed in the holes of the expanded perlite, thereby seriously affecting the yield of the subsequent process using the expanded perlite. In addition, the main component of natural gas is CH 4 ,CH 4 The natural gas is a stable hydrocarbon fossil fuel with the highest hydrogen-carbon ratio, but the conventional fuel gas mode is adopted to burn and heat the natural gas, so that the problems of low combustion efficiency and easiness in generating pollutant gases such as NOx, CO and CH or polluting the atmosphere by pollutants exist.
Therefore, how to fully mix the natural gas fuel and the air and perform heterogeneous complete oxidation reaction on the surface of the catalyst to improve the thermal efficiency of the natural gas fuel, and simultaneously, to reduce the pollution of the polluted gas or pollutants such as NOx, CO, CH and the like, thereby meeting the requirements of high efficiency, energy conservation and environmental protection, and being a technical problem which is urgently needed to be overcome by the technicians in the field.
Disclosure of Invention
Aiming at the defects, the invention provides the efficient and energy-saving gas-fired perlite expansion equipment which enables natural gas fuel to be fully mixed with air and to perform heterogeneous complete oxidation reaction on the surface of a catalyst so as to improve the thermal efficiency of the natural gas fuel, simultaneously generate less NOx, CO, CH and other polluted gases or pollutants to meet the requirements of high efficiency, energy conservation and environmental protection, and comprises an expansion furnace body, a natural gas conveying pipeline, an air conveying pipeline and a gas burner, wherein the expansion furnace body is provided with a hearth, and the gas burner is arranged in the hearth; the gas burner comprises a gas mixing cavity and a gas spray head, wherein the gas mixing cavity is provided with a natural gas inlet, an air inlet and a mixed gas outlet, the natural gas conveying pipeline and the air conveying pipeline are respectively communicated with the gas mixing cavity through the natural gas inlet and the air inlet, and an air inlet pipe of the gas spray head is communicated with the mixed gas outlet.
In order to further realize the invention, the gas burner further comprises a gas catalytic cavity, a gas catalytic oxidant and an air filter screen are arranged in the gas catalytic cavity, the air filter screen is transversely arranged in the gas catalytic cavity, so that the gas catalytic cavity forms an upper cavity and a lower cavity, the gas catalytic oxidant is arranged on the air filter screen and fills the upper cavity, an air outlet port communicated with the upper cavity is arranged on the gas catalytic cavity at a position corresponding to the upper cavity, an air inlet port communicated with the lower cavity is arranged on the gas catalytic cavity at a position corresponding to the lower cavity, the air inlet port of the gas catalytic cavity is communicated with the mixed gas outlet, and the air outlet port of the gas catalytic cavity is communicated with an air inlet pipe of the gas spray head.
In order to further realize the invention, the positions, corresponding to the natural gas inlet and the air inlet, in the gas mixing cavity are respectively provided with a first funnel-shaped opening and a second funnel-shaped opening, the small end opening of the first funnel-shaped opening is connected with the natural gas inlet, the large end opening of the first funnel-shaped opening is communicated with the gas mixing cavity, the small end opening of the second funnel-shaped opening is connected with the air inlet, and the large end opening of the second funnel-shaped opening is communicated with the gas mixing cavity.
In order to further realize the invention, the air inlet pipe of the gas nozzle is provided with a magnetizer which is coated with the air inlet pipe.
To further carry out the invention, the furnace is designed as a venturi tube structure with a wider upper portion and a narrower lower portion.
In order to further realize the invention, the expansion furnace body also comprises a hearth brickwork wall, a heat insulation layer and a shell.
In order to further realize the invention, the air conveying pipeline is provided with a flow regulator for controlling and regulating the air flow.
In order to further realize the invention, the air blower is provided with an adjusting controller.
In order to further realize the invention, a feeding port is arranged on the expansion furnace body at a position corresponding to the upper part of the hearth.
The invention has the beneficial effects that:
1. the invention relates to efficient and energy-saving gas type perlite expansion equipment, which comprises an expansion furnace body natural gas conveying pipeline, an air conveying pipeline, a blower and a gas burner, wherein the gas burner comprises a gas mixing cavity, a gas catalytic cavity and a gas spray nozzle, the gas mixing cavity is provided with a natural gas inlet, an air inlet and a mixed gas outlet, the natural gas conveying pipeline and the air conveying pipeline are respectively communicated with the gas mixing cavity through the natural gas inlet and the air inlet, and an air inlet port of the gas catalytic cavity is communicated with the mixed gas outlet of the gas mixing cavity. Because the air filter screen is transversely arranged in the gas catalytic cavity so that the gas catalytic cavity forms an upper cavity and a lower cavity, the gas catalytic oxidant is arranged on the air filter screen and fills the upper cavity so as to form effective blocking for the gas outlet port of the gas catalytic cavity, the lower cavity of the gas catalytic cavity forms a pressurizing cavity of mixed fuel gas, namely a certain pressure difference is formed between the mixed fuel gas in the lower cavity of the gas catalytic cavity and the gas inlet pipe of the gas spray nozzle, when the mixed fuel gas is continuously concentrated in the lower cavity of the gas catalytic cavity, the mixed fuel gas can be pressurized to form turbulent flow high-speed flowing gas flow upwards, and gas embracing molecules in the mixed fuel gas are pushed to be fully contacted with the gas catalytic oxidant, thereby achieving the purpose of separating the gas embracing molecules in the mixed fuel gas into gas macromolecular groups, and continuously and rapidly repelling the gas catalytic oxidant in the upper chamber of the gas catalytic chamber under the action of high-pressure air flow in the lower chamber of the gas catalytic chamber, so that the separated gas macromolecular groups are finally conveyed to the air inlet pipe of the gas nozzle in the form of gas micromolecular groups, namely, the dissociated gas micromolecular groups are rapidly separated from carriers which are formed by the gas catalytic oxidant and adsorb active components to become desorbed gas micromolecular groups, and the desorbed gas micromolecular groups are subjected to pressure differenceThe gas flow device is characterized in that a magnetizer is coated on the gas inlet pipe of the gas spray head, the magnetizer is used for inducing and polarizing natural gas small molecular groups to form a gas small molecular chain which is orderly arranged, and the gas small molecular chain flows orderly along the gas inlet pipe of the gas spray head under the pushing action of gas flow, so that the gas small molecular chain is easier to catch flame when being burnt at the gas spray head, the purposes of quick ignition and full combustion are achieved, the thermal combustion rate of natural gas is effectively improved, namely, the natural gas fuel and air are fully mixed, heterogeneous complete oxidation reaction is carried out on the surface of a catalyst, the thermal efficiency of the natural gas fuel is improved, and little or even NO generation is realized X The pollutants such as CO and CH have the effects of high efficiency, energy conservation and environmental protection, and the problem that the yield of the subsequent process using the expanded perlite is affected because the polluted gases such as NOx, CO and CH are adsorbed in the holes of the expanded perlite is avoided.
2. The invention relates to efficient and energy-saving gas type perlite expansion equipment, wherein a first funnel-shaped opening and a second funnel-shaped opening are respectively arranged in a gas mixing cavity of a gas burner at positions corresponding to a natural gas inlet and an air inlet, a small end opening of the first funnel-shaped opening is connected with the natural gas inlet, a large end opening of the first funnel-shaped opening is communicated with the gas mixing cavity, a small end opening of the second funnel-shaped opening is connected with the air inlet, and a large end opening of the second funnel-shaped opening is communicated with the gas mixing cavity. The natural gas inlet and the air inlet of the gas mixing cavity are respectively designed by adopting a first funnel-shaped opening and a second funnel-shaped opening, so that natural gas and air are respectively sprayed out through the first funnel-shaped opening and the second funnel-shaped opening, and as the opening diameters of the first funnel-shaped opening and the second funnel-shaped opening are gradually increased, a blasting effect can be formed in the gas mixing cavity, on one hand, the gas flow rate of natural gas and air is reduced, the pressure of the subsequent air flowing into the gas mixing cavity is reduced, the space for the natural gas and the air to be in dispersive contact is increased, and the natural gas and the air are instantaneously and uniformly mixed; on the other hand, along with the increase of the gas flow direction radius, the gas flow rate along the side wall of the first funnel-shaped opening and/or the second funnel-shaped opening is higher than that at the center of the first funnel-shaped opening and/or the second funnel-shaped opening, so that the natural gas and the air at normal temperature can flow towards the outer wall of the gas mixing cavity in a dispersed way, the contact area of the natural gas and the air is larger, the mixing speed of the gas mixing cavity is increased, the phenomenon of overhigh local concentration of the natural gas is not easy to form, and the combustion rate of the natural gas is improved.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1;
FIG. 3 is a schematic view of a spiral heat exchange tube structure according to the present invention;
FIG. 4 is a cross-sectional view of a middle helical tube of the present invention provided with three ribs;
FIG. 5 is a cross-sectional view of a middle helical tube of the present invention provided with four strands of ribs;
fig. 6 is a schematic cross-sectional structure of the gas burner of the present invention.
Detailed Description
The invention will be further elucidated with reference to the accompanying drawings, wherein the direction of the invention is shown in fig. 1.
As shown in fig. 1 to 6, the efficient and energy-saving gas-fired perlite expansion equipment of the invention comprises an expansion furnace body 1, a spiral heat exchange pipeline 2, a natural gas conveying pipeline 3, an air conveying pipeline 4, a blower 5 and a gas burner 6, wherein:
the expansion furnace body 1 is arranged on a furnace frame of the expansion furnace, the expansion furnace body 1 comprises a furnace chamber 11, a furnace chamber brick wall 12, a heat insulation layer 13 and a shell 14, the furnace chamber 11 is designed into a venturi tube type structure with a wider upper part and a narrower lower part, and perlite materials are heated and expanded in the furnace chamber 11 by high-temperature flames sprayed by a gas burner 6 arranged in the furnace chamber 11. The position on the expansion furnace body 1 corresponding to the upper part of the hearth 11 is provided with a feeding port 15, the gas burner 6 is arranged in the hearth 11, and the flame concentrated position sprayed by the gas burner 6 is just positioned in the feeding point 16 area in the hearth 11, so that perlite materials which are fed into the hearth 11 through the feeding port 15 of the expansion furnace body 1 fall into the feeding point 16 area, are rapidly heated and expanded through concentrated flames sprayed by the gas burner 6, are rapidly pumped to the upper part of the hearth 11 through the hearth 11 of a venturi tube structure, and are discharged from the top air outlet 17 of the expansion furnace body 1. Through the venturi effect of the hearth 11 with the venturi tube structure, after the perlite materials are heated and expanded by the gas burner 6 at the lower part of the hearth 11, the perlite materials can be rapidly pumped away from the top air outlet 17 of the expansion furnace body 1 by upward flowing hot air flow, so that the expansion efficiency of the perlite is effectively improved, and the expansion quality of the perlite is remarkably improved.
The spiral heat exchange pipeline 2 is used for carrying out rapid cooling on the inner wall of the hearth brickwork wall 12 of the expansion furnace body 1 through cold air flowing unidirectionally in the pipeline so as to avoid the local overhigh temperature of the hearth brickwork wall 12 of the expansion furnace body 1, and preheating the cold air flowing unidirectionally in the pipeline by utilizing the high temperature in the hearth 11 of the expansion furnace body 1 and discharging the hearth 11 of the expansion furnace body 1 for waste heat recycling. The spiral heat exchange pipeline 2 is arranged in the hearth 11 of the expansion furnace body 1, at least one spiral heat exchange pipeline 2 is arranged in the hearth 11, five spiral heat exchange pipelines 2 are arranged in a mutually side-by-side arrangement mode and are spirally paved on the inner wall surface of the hearth brick wall 12 of the expansion furnace body 1, each spiral heat exchange pipeline 2 is tightly attached to the inner wall surface of the hearth brick wall 12 of the expansion furnace body 1, the spiral heat exchange pipeline 2 is made of a metal material with good heat conducting performance, high temperature resistance and corrosion resistance, so that heat on the inner wall surface of the hearth brick wall 12 of the expansion furnace body 1 is quickly transferred to the spiral heat exchange pipeline 2, the temperature on the spiral heat exchange pipeline 2 is almost equal to the temperature on the inner wall surface of the hearth brick wall 12 of the expansion furnace body 1, and therefore the inner wall of the hearth brick wall 12 of the expansion furnace body 1 can be quickly cooled by cold air flowing in one direction in the spiral heat exchange pipeline 2.
Further, in order to increase the surface area of the spiral heat exchange tube 2 and improve the effect of transferring heat energy to air flowing in one direction in the spiral heat exchange tube 2, the spiral heat exchange tube 2 is formed by integrally forming a cylindrical hollow air outlet tube 21 at the top end, a middle spiral tube body 22 and a cylindrical hollow air inlet tube 23 at the bottom end, the maximum diameter of the cross section of the cylindrical hollow air outlet tube 21 at the top end, the maximum diameter of the cross section of the cylindrical hollow air inlet tube 23 at the bottom end and the maximum diameter of the cross section of the middle spiral tube body 22 are equal, the middle spiral tube body 22 is designed into a hollow structure composed of a plurality of convex strips 24 arranged in a spiral manner, as shown in fig. 4 and 5, the convex strips 24 on the middle spiral tube body 22 can be arranged into three strands or four strands, the inner diameters of the cylindrical hollow air outlet tube 21 at the top end and the cylindrical hollow air inlet tube 23 at the bottom end in the embodiment are 30-50 mm, and the wall thickness of the spiral heat exchange tube 2 is 1-5 mm.
The natural gas conveying pipeline 3 is used for connecting a natural gas source supply station and conveying natural gas to a gas burner 6 arranged in a hearth 11 of the expansion furnace body 1, the air conveying pipeline 4 is used for conveying cold air to the spiral heat exchange pipeline 2, and the blower 5 is used for providing unidirectional flowing power for the air in the air conveying pipeline 4. The air blower 5 is realized by adopting the prior art, the air flow output end of the air blower 5 is connected with the air inlet of the air conveying pipeline 4, and the air outlet of the air conveying pipeline 4 is communicated with the cylindrical hollow air inlet pipe 23 at the bottom end of the spiral heat exchange pipeline 2.
The gas burner 6 comprises a gas mixing cavity 61, a gas catalytic cavity 62 and a gas spray head 63, the gas burner 6 is arranged in the hearth 11, and the flame concentration position sprayed by the gas burner 6 is just positioned in the area of the feeding point 16 in the hearth 11. The gas mixing cavity 61 is provided with a natural gas inlet 611, an air inlet 612 and a mixed gas outlet 613, the cylindrical hollow gas outlet 21 at the top ends of the natural gas conveying pipeline 3 and the spiral heat exchange pipeline 2 is respectively communicated with the gas mixing cavity 61 through the natural gas inlet 611 and the air inlet 612, a first funnel-shaped opening 614 and a second funnel-shaped opening 615 are respectively arranged in the gas mixing cavity 61 at positions corresponding to the natural gas inlet 611 and the air inlet 612, a small end opening of the first funnel-shaped opening 614 is connected with the natural gas inlet 611, a large end opening of the first funnel-shaped opening 614 is communicated with the gas mixing cavity 61, a small end opening of the second funnel-shaped opening 615 is connected with the air inlet 612, and a large end opening of the second funnel-shaped opening 615 is communicated with the gas mixing cavity 61. The natural gas inlet 611 and the air inlet 612 of the gas mixing cavity 61 are respectively designed by adopting a first funnel-shaped opening 614 and a second funnel-shaped opening 615, so that natural gas and air are respectively sprayed out through the first funnel-shaped opening 614 and the second funnel-shaped opening 615, and as the opening diameters of the first funnel-shaped opening 614 and the second funnel-shaped opening 615 are gradually increased, a blasting effect can be formed in the gas mixing cavity 61, on one hand, the gas flow rate of natural gas and air is reduced, the pressure of the subsequent air flowing into the gas mixing cavity 61 is reduced, the space for the natural gas and the air to be in dispersive contact is increased, and the natural gas and the air are uniformly mixed instantaneously; on the other hand, when the natural gas at normal temperature in the natural gas conveying pipeline 3 and the hot air at 300-500 ℃ in the cylindrical hollow air outlet pipe 21 at the top end of the spiral heat exchange pipeline 2 are respectively sprayed out through the first funnel-shaped opening 614 and the second funnel-shaped opening 615, the gas flow rate along the side wall of the first funnel-shaped opening 614 and/or the second funnel-shaped opening 615 is higher than that along the central position of the first funnel-shaped opening 614 and/or the second funnel-shaped opening 615 along the increase of the gas flow radius, so that the natural gas at normal temperature and the hot air at 300-500 ℃ can flow towards the outer wall of the gas mixing cavity 61 in a dispersed way, the contact area between the natural gas and the hot air is larger, the heating speed of the gas mixing cavity 61 is increased, and the phenomenon of overhigh local temperature of the gas flow is not easy to be formed.
The gas catalytic cavity 62 is a hollow shell with a closed space, and a gas catalytic oxidant 621 and an air filter net 622 are arranged in the gas catalytic cavity 62. The gas catalytic oxidizer 621 of this embodiment is in the form of a carrier carrying a catalytically active component, the carrier having a uniform microporous structure, which has strong polarity and coulomb field under the action of van der waals force, and shows strong adsorption ability to polar molecules and unsaturated molecules. The catalytic active component is an active component for improving the hot combustion rate of fuel gas, and the chemical expression of the catalytic active component is as follows: a is that X B Y C Z D w Wherein: a is one or more of Ti, zr, fe, V, cr or Mo elements, B is one of Ni or Co elementsOr a plurality of combinations, C is one or a plurality of combinations of elements selected from Rh, pd or Pt, D is one or a plurality of combinations of elements selected from Mn or Cu, and A, B, C, D is composed of powdery simple substance materials.
An airstrainer 622 is transverse to the gas catalytic chamber 62 such that the gas catalytic chamber 62 forms an upper chamber and a lower chamber, and a gas catalytic oxidizer 621 is disposed on the airstrainer 622 and fills the upper chamber. The gas catalytic chamber 62 is provided with an air outlet port communicated with the upper chamber at a position corresponding to the upper chamber, the gas catalytic chamber 62 is provided with an air inlet port 626 communicated with the lower chamber at a position corresponding to the lower chamber, and the air inlet port 626 of the gas catalytic chamber 62 is communicated with the mixed gas outlet 613 of the gas mixing chamber 61. The gas nozzle 63 is realized by adopting the prior art, and an air inlet pipe of the gas nozzle 63 is communicated with an air outlet port of the gas catalytic cavity 62. Further, the air inlet pipe of the gas nozzle 63 is provided with a magnetizer which is used for inducing and polarizing the natural gas small molecular groups to form a gas small molecular chain which is orderly arranged, and the gas small molecular chain flows orderly along the air inlet pipe of the gas nozzle 63 under the pushing action of the air flow, so that the gas small molecular chain is easier to catch flame when being burnt at the gas nozzle 63, the purposes of quick ignition and full combustion are achieved, and the thermal combustion rate of the natural gas is effectively improved.
The basic working principle and working process of the efficient and energy-saving gas type perlite expansion equipment are as follows:
(1) In the high-temperature roasting and puffing processing process of perlite, a blower 5 continuously blows cold air flow into an air conveying pipeline 4 to form unidirectional flowing air flow in the air conveying pipeline 4, after the unidirectional flowing air flow is conveyed to a spiral heat exchange pipeline 2 through the air conveying pipeline 4, the unidirectional flowing air flow is formed in the spiral heat exchange pipeline 2, the inner wall of a hearth brickwork wall 12 of an expansion furnace body 1 is rapidly cooled by the unidirectional flowing cold air in the pipeline to avoid the local temperature of the hearth brickwork wall 12 of the expansion furnace body 1 from being too high, and the unidirectional flowing cold air in the pipeline is preheated by utilizing the high temperature in a hearth 11 of the expansion furnace body 1, and the hearth 11 of the expansion furnace body 1 is discharged for waste heat recycling. The spiral heat exchange pipeline 2 is arranged in the hearth 11 of the expansion furnace body in a spiral mode, the heat contact area between the spiral heat exchange pipeline 2 and the hearth 11 is increased, the flowing time of air flow in the spiral heat exchange pipeline 2 is prolonged, and the air heat exchange efficiency in the spiral heat exchange pipeline 2 is improved. After the unidirectional flowing cold air flow exchanges heat through the spiral heat exchange pipeline 2, the air temperature can reach 300-500 ℃. In the actual production process, a flow regulator for controlling and regulating the air flow rate is arranged on the air conveying pipeline 4, and a regulating controller is arranged on the air blower, so that the flow rate and the flow velocity of the air in the spiral heat exchange pipeline 2 are regulated and controlled through the flow regulator and the controller, and the hot air with the lower temperature of 300-400 ℃ is obtained when the air flow rate is high and the flow velocity is high, and the hot air with the higher temperature of 400-500 ℃ is obtained when the air flow rate is low and the flow velocity is low, so that the hot air with the required temperature range is exchanged according to the actual requirement.
(2) After heat exchange through the spiral heat exchange pipeline 2, the hot air flows into the gas mixing cavity 61 of the gas burner 6, natural gas entering the gas mixing cavity 61 from the natural gas inlet 611 and the hot air entering the gas mixing cavity 61 from the air inlet 612 are instantaneously and uniformly mixed in the gas mixing cavity 61, and the natural gas at normal temperature is mixed and heated to form hot mixed fuel gas with higher temperature, so that the local temperature of the mixed gas is prevented from being too high; the hot mixed fuel gas with higher temperature flows into the gas catalytic cavity 62 from the gas mixing cavity 61 of the gas burner 6, and the natural gas in the hot mixed fuel gas with higher temperature has higher temperature (more than 200 ℃), so that the natural gas and the gas catalytic oxidant 621 in the gas catalytic cavity 62 undergo catalytic oxidation reaction under the high temperature condition, and the catalytic oxidation efficiency of the natural gas is improved.
Since the air filter 622 is cross-sectioned within the gas catalytic chamber 62 such that the gas catalytic chamber 62 forms an upper chamber and a lower chamber, the gas catalytic oxidizer 621 is disposed on the air filter 622 and fills the upper chamber, and the gas catalytic chamber 62 is disposed at a position corresponding to the upper chamber thereof and is connected with the upper chamberThe gas outlet port communicated with the chamber, the gas inlet port 626 communicated with the lower chamber is arranged on the gas catalytic chamber 62 corresponding to the position of the lower chamber, the gas inlet port 626 of the gas catalytic chamber 62 is communicated with the mixed gas outlet 613 of the gas mixing chamber 61, the gas inlet pipe of the gas spray head 63 is communicated with the gas outlet port of the gas catalytic chamber 62, the gas catalytic oxidant 621 is arranged on the air filter screen 622 and is filled in the upper chamber of the gas catalytic chamber 62 to effectively seal the gas outlet port of the gas catalytic chamber 62, so that the lower chamber of the gas catalytic chamber 62 forms a pressurized chamber with hot mixed fuel gas with higher temperature, namely, a certain pressure difference is formed between the hot mixed fuel gas with higher temperature in the lower chamber of the gas catalytic chamber 62 and the gas inlet pipe of the gas spray head 63, when the hot mixed fuel gas with higher temperature is continuously concentrated in the lower chamber of the fuel gas catalytic chamber 62, the hot mixed fuel gas with higher temperature can be pressurized to form turbulent flowing high-speed flowing air flow upwards, and the fuel gas embracing molecules in the hot mixed fuel gas with higher temperature are pushed to fully contact with the fuel gas catalytic oxidizer 621, so that the purpose that the fuel gas embracing molecules in the hot mixed fuel gas with higher temperature are separated into fuel gas macromolecular groups is achieved, and the separated fuel gas macromolecular groups are continuously and rapidly separated from the fuel gas catalytic oxidizer 621 in the upper chamber of the fuel gas catalytic chamber 62 under the action of high-pressure air flow in the lower chamber of the fuel gas catalytic chamber 62, and finally the separated fuel gas macromolecular groups are conveyed to the air inlet pipe of the fuel gas nozzle 63 in the form of fuel gas micromolecular groups, the dissociated gas micro-clusters are quickly separated from the carrier adsorbed with the active ingredients and formed by the gas catalytic oxidant 621 to become desorbed gas micro-clusters, the desorbed gas micro-clusters continuously flow quickly along the gas inlet pipe of the gas nozzle 63 under the action of pressure difference, a magnetizer is arranged on the gas inlet pipe of the gas nozzle 63 and used for inducing and polarizing the natural gas micro-clusters to form orderly arranged gas micro-clusters, and the gas micro-clusters flow orderly along the gas inlet pipe of the gas nozzle 63 under the pushing action of the gas flow, so that the gas micro-clusters are easier to catch flame when being burnt at the gas nozzle 63, and quick ignition is achievedThe purpose of full combustion is to effectively improve the thermal combustion rate of natural gas and realize little or even NO generation of NO X The pollutants such as CO, CH and the like have the effects of high efficiency, energy conservation and environmental protection.
The above description is merely of a preferred embodiment of the present invention, the present invention is not limited to the above embodiment, and minor structural modifications may exist in the implementation process, and if various modifications or variations of the present invention do not depart from the spirit and scope of the present invention and fall within the scope of the appended claims and the equivalent technology, the present invention is also intended to include such modifications and variations.
Claims (7)
1. An efficient energy-saving gas type perlite expansion device is characterized in that: the device comprises an expansion furnace body, a natural gas conveying pipeline, an air conveying pipeline, a blower and a gas burner, wherein the expansion furnace body is provided with a hearth, and the gas burner is arranged in the hearth; the gas burner comprises a gas mixing cavity and a gas spray head, wherein the gas mixing cavity is provided with a natural gas inlet, an air inlet and a mixed gas outlet, the natural gas conveying pipeline and the air conveying pipeline are respectively communicated with the gas mixing cavity through the natural gas inlet and the air inlet, and an air inlet pipe of the gas spray head is communicated with the mixed gas outlet; the air flow output end of the air blower is connected with the air inlet of the air conveying pipeline;
the gas burner further comprises a gas catalytic cavity, a gas catalytic oxidant and an air filter screen are arranged in the gas catalytic cavity, the air filter screen is transversely arranged in the gas catalytic cavity, so that the gas catalytic cavity forms an upper cavity and a lower cavity, the gas catalytic oxidant is arranged on the air filter screen and fills the upper cavity, an air outlet port communicated with the upper cavity is arranged on the gas catalytic cavity at a position corresponding to the upper cavity, an air inlet port communicated with the lower cavity is arranged on the gas catalytic cavity at a position corresponding to the lower cavity, the air inlet port of the gas catalytic cavity is communicated with the mixed gas outlet, and the air outlet port of the gas catalytic cavity is communicated with an air inlet pipe of the gas spray head;
the gas mixing cavity is internally provided with a first funnel-shaped opening and a second funnel-shaped opening corresponding to the natural gas inlet and the air inlet respectively, a small end opening of the first funnel-shaped opening is connected with the natural gas inlet, a large end opening of the first funnel-shaped opening is communicated with the gas mixing cavity, a small end opening of the second funnel-shaped opening is connected with the air inlet, and a large end opening of the second funnel-shaped opening is communicated with the gas mixing cavity.
2. The energy efficient gas fired perlite expansion apparatus of claim 1, characterized by: the air inlet pipe of the gas spray head is provided with a magnetizer.
3. The energy efficient gas fired perlite expansion apparatus of claim 1, characterized by: the hearth is designed into a venturi tube type structure with a wider upper part and a narrower lower part.
4. The energy efficient gas fired perlite expansion apparatus of claim 1, characterized by: the expansion furnace body further comprises a hearth brick wall, a heat insulation layer and a shell.
5. The energy efficient gas fired perlite expansion apparatus of claim 1, characterized by: the air conveying pipeline is provided with a flow regulator for controlling and regulating air flow.
6. The energy efficient gas fired perlite expansion apparatus of claim 1, characterized by: the air blower is provided with an adjusting controller.
7. The energy efficient gas fired perlite expansion apparatus of claim 1, characterized by: and a feeding port is arranged on the expansion furnace body at a position corresponding to the upper part of the hearth.
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| CN201810272323.4A CN108224422B (en) | 2018-03-29 | 2018-03-29 | High-efficiency energy-saving gas type perlite expansion equipment |
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| CN201810272323.4A CN108224422B (en) | 2018-03-29 | 2018-03-29 | High-efficiency energy-saving gas type perlite expansion equipment |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101643597A (en) * | 2009-08-26 | 2010-02-10 | 董瑞 | Method for expanding open-bore perlite by gas indirect heating |
| CN105757658A (en) * | 2016-05-04 | 2016-07-13 | 广州宇能新能源科技有限公司 | Novel fuel gas catalysis device applied to industrial boiler |
| CN205782892U (en) * | 2016-05-04 | 2016-12-07 | 广州宇能新能源科技有限公司 | It is applied to the novel gas catalysis device of Industrial Boiler |
| CN208186336U (en) * | 2018-03-29 | 2018-12-04 | 广东盛达穗南环保科技有限公司 | Energy-efficient combustion type perlite bloating plant |
-
2018
- 2018-03-29 CN CN201810272323.4A patent/CN108224422B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101643597A (en) * | 2009-08-26 | 2010-02-10 | 董瑞 | Method for expanding open-bore perlite by gas indirect heating |
| CN105757658A (en) * | 2016-05-04 | 2016-07-13 | 广州宇能新能源科技有限公司 | Novel fuel gas catalysis device applied to industrial boiler |
| CN205782892U (en) * | 2016-05-04 | 2016-12-07 | 广州宇能新能源科技有限公司 | It is applied to the novel gas catalysis device of Industrial Boiler |
| CN208186336U (en) * | 2018-03-29 | 2018-12-04 | 广东盛达穗南环保科技有限公司 | Energy-efficient combustion type perlite bloating plant |
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