CN113686152A - Sodium silicate kiln - Google Patents
Sodium silicate kiln Download PDFInfo
- Publication number
- CN113686152A CN113686152A CN202111048101.2A CN202111048101A CN113686152A CN 113686152 A CN113686152 A CN 113686152A CN 202111048101 A CN202111048101 A CN 202111048101A CN 113686152 A CN113686152 A CN 113686152A
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- Prior art keywords
- kiln
- heat exchange
- air
- preheating device
- pipe
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- 239000004115 Sodium Silicate Substances 0.000 title claims abstract description 37
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 title claims abstract description 37
- 229910052911 sodium silicate Inorganic materials 0.000 title claims abstract description 37
- 239000007789 gas Substances 0.000 claims abstract description 112
- 230000000149 penetrating effect Effects 0.000 claims abstract description 8
- 239000002737 fuel gas Substances 0.000 claims abstract description 5
- 238000002485 combustion reaction Methods 0.000 claims description 29
- 239000011449 brick Substances 0.000 claims description 22
- 238000001816 cooling Methods 0.000 claims description 11
- 238000009413 insulation Methods 0.000 claims description 7
- 229920000742 Cotton Polymers 0.000 claims description 4
- 238000003491 array Methods 0.000 claims description 3
- 239000000498 cooling water Substances 0.000 claims description 3
- 239000004519 grease Substances 0.000 claims description 3
- 229920001296 polysiloxane Polymers 0.000 claims description 3
- 230000017525 heat dissipation Effects 0.000 abstract description 16
- 238000005265 energy consumption Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 5
- 238000002360 preparation method Methods 0.000 abstract description 2
- 230000005855 radiation Effects 0.000 abstract 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 5
- 239000002918 waste heat Substances 0.000 description 5
- 229910000029 sodium carbonate Inorganic materials 0.000 description 4
- 235000017550 sodium carbonate Nutrition 0.000 description 4
- 239000006004 Quartz sand Substances 0.000 description 3
- 239000011111 cardboard Substances 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000004134 energy conservation Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 238000003181 co-melting Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 238000010276 construction Methods 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
- 239000000446 fuel Substances 0.000 description 1
- 238000003837 high-temperature calcination Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 230000000191 radiation effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B17/00—Furnaces of a kind not covered by any preceding group
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/20—Silicates
- C01B33/32—Alkali metal silicates
-
- 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
- F23D14/66—Preheating the combustion air or gas
-
- 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
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
-
- 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
- F27D9/00—Cooling of furnaces or of charges therein
-
- 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
- F27D9/00—Cooling of furnaces or of charges therein
- F27D2009/0002—Cooling of furnaces
- F27D2009/001—Cooling of furnaces the cooling medium being a fluid other than a gas
- F27D2009/0013—Cooling of furnaces the cooling medium being a fluid other than a gas the fluid being water
-
- 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
- F27D9/00—Cooling of furnaces or of charges therein
- F27D2009/0002—Cooling of furnaces
- F27D2009/0018—Cooling of furnaces the cooling medium passing through a pattern of tubes
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
-
- 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]
-
- 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
- Y02P10/25—Process efficiency
-
- 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
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Environmental & Geological Engineering (AREA)
- Air Supply (AREA)
Abstract
A sodium silicate kiln relates to the technical field of sodium silicate preparation, and comprises a kiln, an air preheating device and a fuel gas preheating device; the kiln comprises a kiln body, wherein the outer wall of the kiln body is provided with a heat radiation coil pipe; the air preheating device comprises a heat exchange body and a wind gathering cover, wherein a plurality of rows of tail gas channels penetrating through the heat exchange body are arranged at intervals at one end of the heat exchange body from top to bottom, a plurality of rows of air channels penetrating through the heat exchange body are arranged at intervals at one side of the heat exchange body from top to bottom, and the tail gas channels and the air channels are staggered up and down and do not penetrate through each other; the two sides of the heat exchange body are respectively provided with a connecting elbow used for communicating the air channel of the heat exchange body into a whole air passage, and one end of the air passage is communicated with an air pump; the sodium silicate kiln can not only improve the heat dissipation effect and prolong the service life of the kiln body, but also effectively reduce the energy consumption.
Description
Technical Field
The invention relates to the technical field of sodium silicate preparation, in particular to a sodium silicate kiln.
Background
Sodium silicate is prepared by co-melting silica (quartz sand) and soda ash (or soda ash) in a melting kiln, cooling and crushing, wherein the fuel is coal, natural gas or coal gas, the raw materials for producing sodium silicate are quartz sand and soda ash, the quartz sand and the soda ash are mixed according to a certain proportion and sent to a sodium silicate kiln, and the sodium silicate kiln is prepared by high-temperature calcination, the kiln temperature is usually 1250-1400 ℃ during the calcination operation of the sodium silicate kiln, so the tail gas temperature of the sodium silicate kiln is higher, if the tail gas is directly discharged, energy waste is caused, and because the temperature is too high, the wall of an old sodium silicate kiln mostly radiates heat in an air cooling mode, the service life of the kiln wall is shorter, and because the heat radiation effect is poor, a protective layer needs to be regularly replaced in the existing old sodium silicate kiln, the maintenance cost is increased, the production efficiency is seriously influenced, if the old sodium silicate kiln is directly replaced by a new-type waste device, the cost is high, so that technical transformation needs to be carried out on the basis of the existing sodium silicate kiln;
in addition, the temperature of combustion air and fuel gas entering the sodium silicate kiln directly influences the thermal efficiency of combustion, and the preheating of the air entering the sodium silicate kiln can effectively improve the thermal efficiency of combustion and reduce energy consumption; however, most of the existing air preheating devices have the problems of complex structure, difficult installation, high later maintenance cost and short service life, and the phenomenon is also a problem to be solved urgently by technical personnel in the field.
Disclosure of Invention
In order to overcome the defects in the background art, the invention discloses a sodium silicate kiln which can improve the heat dissipation effect and prolong the service life of a kiln body and can effectively reduce energy consumption.
In order to achieve the purpose, the invention adopts the following technical scheme:
a sodium silicate kiln comprises a kiln, an air preheating device and a fuel gas preheating device; the tail gas exhaust port of the kiln combustion chamber is communicated with the air preheating device and the fuel gas preheating device in sequence; the kiln comprises a kiln body, wherein a plurality of sections of radiating pipes along the length direction of the kiln body are arranged on the outer wall of the kiln body side by side in the circumferential direction, the plurality of sections of radiating pipes are sequentially connected in series and communicated through detachable elbow pipes to form a radiating coil pipe, and two ends of the radiating coil pipe are respectively and correspondingly connected with an external cooling system for providing circulating cooling water; the air preheating device comprises a heat exchange body and a wind gathering cover, wherein a plurality of rows of tail gas channels penetrating through the heat exchange body are arranged at intervals at one end of the heat exchange body from top to bottom, a plurality of rows of air channels penetrating through the heat exchange body are arranged at intervals at one side of the heat exchange body from top to bottom, and the tail gas channels and the air channels are staggered up and down and do not penetrate through each other; the two sides of the heat exchange body are respectively provided with a connecting elbow used for communicating the air channel of the heat exchange body into a whole air passage, one end of the air passage is communicated with an air pump, and the other end of the air passage is correspondingly communicated with an air inlet of the kiln combustion chamber through a conduit; one end of the tail gas channel is correspondingly communicated with a tail gas exhaust port of the kiln, the other end of the heat exchange body, which corresponds to the tail gas channel, is provided with a wind gathering cover used for correspondingly communicating the tail gas channel with the gas preheating device, and a heat-resistant heat insulation layer is paved in the wind gathering cover; the gas preheating device comprises a heat exchange tube, one end of the heat exchange tube is correspondingly communicated with the air collecting cover, a tube body of the heat exchange tube is tightly spirally wound with a plurality of circles of gas tubes, and the gas outlet end of each gas tube is correspondingly communicated with a gas inlet of the combustion cavity of the kiln.
Further, the radiator pipe is equipped with a plurality of fixed cardboards along the even interval of axial, the protruding card arc that forms circumference and press the radiator pipe outer wall that forms of the middle part of fixed cardboard, the furnace body outer wall is pressed close to the both ends face of fixed cardboard and is equipped with two connecting holes respectively, the furnace body outer wall corresponds the connecting hole and is equipped with the screw hole that is used for the screw to revolve to twist the connection.
Further, the outer wall of the furnace body is provided with a groove matched with the outer wall of the radiating pipe and pressed close to the radiating pipe.
Furthermore, each section of radiating pipe is formed by detachably connecting a plurality of unit pipes in series.
Further, the pipe end of the elbow pipe is hermetically connected with the pipe end of the corresponding radiating pipe through a flange.
Furthermore, the heat exchange body is formed by stacking a plurality of refractory brick arrays.
Furthermore, arc grooves are formed in the top and the bottom of each refractory brick, the arc groove in the bottom of the upper refractory brick and the arc groove in the top of the lower refractory brick in two upper and lower adjacent refractory bricks forming the heat exchange body can be correspondingly spliced into a circular through hole, and an air pipe correspondingly communicated with the corresponding connecting elbow is arranged in the air channel; the heat conducting block is arranged at the position, corresponding to the intersection position of the top arc groove and the bottom arc groove of the refractory brick, and heat conducting silicone grease is coated between the heat conducting block and the air pipe.
Further, the air preheating device and the gas preheating device are correspondingly communicated through a buffer tube, and the diameter of the tube body of the buffer tube is larger than the diameter of the two ends of the buffer tube.
Furthermore, the air preheating device and the gas preheating device are wrapped by heat insulation cotton.
Furthermore, a plurality of heat conducting strips are annularly arranged on the inner wall of the heat exchange tube at intervals.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
according to the sodium silicate kiln disclosed by the invention, the heat dissipation coil is arranged on the outer wall of the kiln body and connected with the cooling system for water cooling heat dissipation, so that compared with the traditional air cooling heat dissipation, the heat dissipation effect can be improved, and the service life of the kiln wall of the sodium silicate kiln is effectively prolonged; the heat dissipation coil is of a sectional structure, so that the heat dissipation coil can be conveniently detached for later maintenance; by designing multi-stage preheating, the temperature of tail gas entering the air preheating device is higher than that of tail gas entering the gas preheating device, so that the aim of preheating air and gas entering a combustion cavity of the sodium silicate kiln in a grading manner can be fulfilled; when the tail gas flows through the tail gas channel, the waste heat of the tail gas can heat the heat exchange body, so that the heat exchange body can preheat the air flowing through the air channel, and the heated air enters the combustion cavity of the sodium silicate kiln, so that the combustion heat efficiency can be effectively improved, and the purposes of saving energy and reducing consumption are achieved; the tail gas of air preheating device that flows through gets into and can heat the heat exchange tube behind the heat exchange tube, and the heat exchange tube gives the gas pipe with heat transfer, and then realizes the purpose to gas preheating in the gas pipe, has further improved the thermal efficiency of burning.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention;
FIG. 2 is a schematic view of the arrangement of the heat dissipation pipes on the outer wall of the furnace body;
FIG. 3 is a cross-sectional schematic view of the radiating pipe;
FIG. 4 is a schematic view of the connection structure of the elbow pipe;
FIG. 5 is a schematic structural view of the air preheating device;
FIG. 6 is a schematic structural view of the gas preheating device;
FIG. 7 is a schematic structural view of the heat exchange body;
FIG. 8 is a schematic structural view of the refractory brick;
FIG. 9 is a schematic cross-sectional view of the refractory brick.
In the figure: 1. an air preheating device; 1-1, a heat exchange body; 1-2, a wind gathering cover; 1-3, a tail gas channel; 1-4, air channels; 1-5, connecting an elbow; 1-6, heat conducting blocks; 1-7, arc groove; 1-8, air tube; 2. A gas preheating device; 2-1, heat exchange tubes; 2-2, a gas pipe; 2-3, heat conducting strips; 3. a kiln; 3-1, a furnace body; 3-2, radiating pipes; 3-3, elbow pipe; 3-4, fixing a clamping plate; 3-5, screws; 4. a buffer tube.
Detailed Description
In the following description, the technical solutions of the present invention will be described with reference to the drawings of the embodiments of the present invention, and it should be understood that, if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "front", "rear", "left", "right", etc., it is only corresponding to the drawings of the present invention, and for convenience of describing the present invention, it is not necessary to indicate or imply that the indicated devices or elements have a specific orientation:
the sodium silicate kiln furnace described with reference to fig. 1-9 comprises a kiln 3, an air preheating device 1 and a gas preheating device 2; a tail gas exhaust port of a combustion cavity of the kiln 3 is sequentially communicated with the air preheating device 1 and the gas preheating device 2, namely tail gas exhausted from the combustion cavity of the kiln 3 can sequentially flow through the air preheating device 1 and the gas preheating device 2;
the kiln 3 comprises a kiln body 3-1, a plurality of sections of radiating pipes 3-2 are arranged side by side along the length direction of the kiln body 3-1 on the outer wall of the kiln body 1 in the circumferential direction, and the radiating pipes 3-2 can be square pipes or round pipes, preferably round pipes; according to the requirement, each section of the radiating pipe 3-2 is formed by coaxially, detachably and serially connecting a plurality of unit pipes, and two adjacent unit pipes can be hermetically connected through flanges, so that the radiating pipe is convenient to disassemble, assemble, replace and maintain, and scale in the pipe is cleaned; the multiple sections of radiating pipes 3-2 are sequentially connected in series and communicated through detachable elbow pipes 3-3 to form radiating coil pipes, and the pipe ends of the elbow pipes 3-3 are hermetically connected with the pipe ends of the corresponding radiating pipes 3-2 through flanges as required, so that the radiating pipes are convenient to disassemble, assemble and maintain; two ends of the heat dissipation coil are respectively and correspondingly connected with an external cooling system for providing circulating cooling water; the heat dissipation coil is arranged on the outer wall of the furnace body 3-1 and connected with the cooling system for water cooling heat dissipation, so that compared with the traditional air cooling heat dissipation, the heat dissipation effect can be improved, the service life of the furnace wall of the sodium silicate kiln furnace is effectively prolonged, and the heat dissipation coil is of a sectional structure, so that the heat dissipation coil can be conveniently detached for later maintenance;
according to the requirement, the outer wall of the furnace body 3-1 is provided with a groove matched with the outer wall of the radiating pipe 3-2 and close to the groove, so that the contact area of the radiating pipe 3-2 and the furnace body 3-1 is increased conveniently, and the radiating effect is improved; according to the requirement, the radiating pipe 3-2 is evenly provided with a plurality of fixing clamping plates 3-4 at intervals along the axial direction, the middle part of each fixing clamping plate 3-4 protrudes to form a clamping arc which is circumferentially pressed on the outer wall of the radiating pipe 3-2, the two end plate surfaces of each fixing clamping plate 3-4 are close to the outer wall of the furnace body 3-1 and are respectively provided with two connecting holes, the outer wall of the furnace body 3-1 is provided with threaded holes for screwing and connecting screws 3-5 corresponding to the connecting holes, so that the radiating pipe 3-2 can be stably connected with the furnace body 3-1 through the fixing clamping plates 3-4, and the disassembly, assembly and maintenance are convenient;
according to the requirement, the radiating pipes 3-2 do not need to pass through the fixing clamping plates 3-4, only the pipe walls of two adjacent sections of radiating pipes 3-2 are connected through the detachable connecting rods, meanwhile, the elbow pipes 3-3 are made into high-temperature-resistant hoses, so that the whole radiating coil pipe can be integrally lapped on the outer wall of the furnace body 3-1 like a quilt, the temperature of the furnace body can reach 1250-1400 ℃, the temperature of the outer wall of the furnace body is relatively high, and once water is not introduced into the radiating pipes 3-2, the sealing gaskets at all sealing positions are greatly damaged, and therefore the radiating coil pipe needs to be quickly pulled away from the furnace body 3-1;
the air preheating device 1 comprises a heat exchange body 1-1 and a wind gathering cover I1-2, wherein a plurality of rows of tail gas channels 1-3 penetrating through the heat exchange body 1-1 are arranged at one end of the heat exchange body 1-1 at intervals from top to bottom, and the sum of the pipe diameters of the tail gas channels 1-3 of the heat exchange body 1-1 is not smaller than the pipe diameter of a tail gas exhaust port of a combustion cavity of a kiln 3, so that the tail gas of the combustion cavity of the kiln 3 can be smoothly discharged, a plurality of rows of air channels 1-4 penetrating through the heat exchange body 1-1 are arranged at one side of the heat exchange body 1-1 at intervals from top to bottom, and the tail gas channels 1-3 and the air channels 1-4 are staggered up and down and are not communicated with each other; according to the requirement, the axes of the tail gas channels 1-3 are correspondingly vertical to the axes of the air channels 1-4, and the layout is compact and reasonable; the two sides of the heat exchange body 1-1 are respectively provided with a connecting elbow 1-5 for communicating the air channel 1-4 of the heat exchange body 1-1 into a whole air passage, one end of the air passage is communicated with an air pump, and the other end of the air passage is correspondingly communicated with an air inlet of a combustion cavity of the kiln 3 through a conduit, namely, air blown out by the air pump can enter the combustion cavity of the kiln 3 through the air passage;
one end of the tail gas channel 1-3 is correspondingly communicated with a tail gas exhaust port of the kiln 3, the other end of the heat exchange body 1-1, which corresponds to the tail gas channel 1-3, is provided with a wind gathering cover 1-2 for correspondingly communicating the tail gas channel 1-3 with the gas preheating device 2, and a heat-resistant insulating layer is laid in the wind gathering cover 1-2, namely, tail gas exhausted from a combustion cavity of the kiln 3 can flow through the tail gas channel 1-3, when tail gas flows through the tail gas channel 1-3, waste heat of the tail gas can heat the heat exchange body 1-1, so that the heat exchange body 1-1 can preheat air flowing through the air channel 1-4, and the heated air enters the combustion cavity of the kiln 3, so that the heat efficiency of combustion can be effectively improved, and the purposes of energy conservation and consumption reduction are achieved; according to the requirements, the heat exchange body 1-1 is formed by stacking a plurality of refractory brick arrays, the top and the bottom of each refractory brick are provided with arc grooves 1-7, and the arc grooves 1-7 at the bottom of the upper refractory brick and the arc grooves 1-7 at the top of the lower refractory brick in the two upper and lower adjacent refractory bricks forming the heat exchange body 1-1 can be correspondingly spliced into a circular through hole, so that the heat exchange body has the advantages of simple structure, convenience in construction and low cost, the refractory bricks have good corrosion resistance and long service life, and the production cost can be effectively reduced;
the gas preheating device 2 comprises a heat exchange tube 2-1, one end of the heat exchange tube 2-1 is correspondingly communicated with a wind gathering cover 1-6, a tube body of the heat exchange tube 2-1 is tightly and spirally wound with a plurality of circles of gas tubes 2-2, the gas outlet end of the gas tube 2-2 is correspondingly communicated with a gas inlet of a combustion cavity of the kiln 3, namely, tail gas flowing through the air preheating device 1 enters the heat exchange tube 2-1 and can heat the heat exchange tube 2-1, the heat exchange tube 2-1 transfers heat to the gas tube 2-2, the purpose of preheating the gas in the gas tube 2-2 is further achieved, and the combustion heat efficiency is further improved; according to the requirement, a plurality of heat conduction strips 2-3 are annularly arranged on the inner wall of the heat exchange tube 2-1 at intervals, so that the contact area between the inner wall of the heat exchange tube 2-1 and tail gas can be effectively increased, the heat exchange efficiency of the heat exchange tube 2-1 is improved, meanwhile, the heat conduction strips 2-3 are spirally arranged along the axis of the heat exchange tube 2-1, namely, the spiral heat conduction strips 2-3 can play a role in guiding, so that the tail gas can swirl along the axis of the heat exchange tube 2-1, the retention time of the tail gas in the heat exchange tube 2-1 is prolonged, and the heat exchange performance of the heat exchange tube 2-1 is further improved;
in addition, air pipes 1-8 correspondingly communicated with the corresponding connecting elbows 1-5 are arranged in the air channels 1-4, air is conveyed by an air pump and has certain pressure, and air leakage can be effectively avoided by correspondingly communicating the air pipes 1-8 with the corresponding connecting elbows 1-5; the heat conducting blocks 1-6 are arranged at the positions of the refractory bricks corresponding to the intersections of the top arc grooves 1-7 and the bottom arc grooves 1-7 of the refractory bricks, and heat conducting silicone grease is coated between the heat conducting blocks 1-6 and the air pipes 1-8, so that the heat exchange efficiency can be further improved; the air preheating device 1 is correspondingly communicated with the gas preheating device 2 through a buffer tube 4, and the diameter of the tube body of the buffer tube 4 is larger than the diameters of two ends of the buffer tube 4, namely tail gas exhausted from the air preheating device 1 can be suspended in the buffer tube 4, so that the flow speed is reduced, the tail gas is prevented from rapidly flowing through the gas preheating device 2, and the heat exchange performance of the gas preheating device 2 is reduced; the air preheating device 1 and the gas preheating device 2 are wrapped with heat insulation cotton, and the heat insulation cotton can play a role in heat preservation and heat insulation and avoid large heat loss;
when the tail gas exhaust port of the combustion cavity of the kiln 3 is communicated with the air preheating device 1 and the gas preheating device 2 in sequence, and the tail gas exhaust port of the gas preheating device 2 is communicated with tail gas treatment equipment for tail gas treatment, so that the tail gas is prevented from being directly discharged to pollute air, or the tail gas exhaust port of the gas preheating device 2 is communicated with a waste heat utilization device to further utilize the waste heat of the tail gas, and the energy consumption is saved; the gas pipe 2-2 is communicated with gas, and the gas can be combusted in the combustion cavity of the kiln 3 by starting the gas pump; tail gas exhausted from a combustion cavity of the kiln 3 can flow through the tail gas channel 1-3, when tail gas flows through the tail gas channel 1-3, waste heat of the tail gas can heat the heat exchange body 1-1, so that the heat exchange body 1-1 can preheat air flowing through the air channel 1-4, and the heated air enters the combustion cavity of the kiln 3, so that the heat efficiency of combustion can be effectively improved, and the purposes of energy conservation and consumption reduction are achieved; the tail gas flowing through the air preheating device 1 enters the heat exchange tube 2-1 and then can heat the heat exchange tube 2-1, the heat exchange tube 2-1 transfers heat to the gas tube 2-2, the purpose of preheating the gas in the gas tube 2-2 is achieved, and the heat efficiency of combustion is further improved.
The invention is not described in detail in the prior art, and it is apparent to a person skilled in the art that the invention is not limited to details of the above-described exemplary embodiments, but that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics thereof; the present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the scope of the claims concerned.
Claims (10)
1. A sodium silicate kiln is characterized in that: comprises a kiln (3), an air preheating device (1) and a fuel gas preheating device (2); a tail gas exhaust port of a combustion cavity of the kiln (3) is communicated with the air preheating device (1) and the gas preheating device (2) in sequence;
the kiln (3) comprises a kiln body (3-1), a plurality of sections of radiating pipes (3-2) along the length direction of the kiln body (3-1) are arranged side by side in the circumferential direction of the outer wall of the kiln body (3-1), the plurality of sections of radiating pipes (3-2) are sequentially connected in series and communicated through detachable elbow pipes (3-3) to form a radiating coil pipe, and two ends of the radiating coil pipe are respectively and correspondingly connected with an external cooling system for providing circulating cooling water;
the air preheating device (1) comprises a heat exchange body (1-1) and a wind gathering cover (1-2), wherein multiple rows of tail gas channels (1-3) penetrating through the heat exchange body (1-1) are arranged at one end of the heat exchange body (1-1) from top to bottom at intervals, multiple rows of air channels (1-4) penetrating through the heat exchange body (1-1) are arranged at one side of the heat exchange body (1-1) from top to bottom at intervals, and the tail gas channels (1-3) and the air channels (1-4) are arranged in a vertically staggered mode and are not communicated with each other; both sides of the heat exchange body (1-1) are provided with connecting elbows (1-5) for communicating the air channels (1-4) of the heat exchange body (1-1) into a whole air passage, one end of the air passage is communicated with an air pump, and the other end of the air passage is correspondingly communicated with an air inlet of a combustion cavity of the kiln (3) through a conduit; one end of the tail gas channel (1-3) is correspondingly communicated with a tail gas exhaust port of the kiln (3), the other end of the heat exchange body (1-1) corresponding to the tail gas channel (1-3) is provided with a wind gathering cover (1-2) used for enabling the tail gas channel (1-3) to be correspondingly communicated with the gas preheating device (2), and a heat-resistant heat insulation layer is laid in the wind gathering cover (1-2);
the gas preheating device (2) comprises a heat exchange pipe (2-1) with one end correspondingly communicated with the air collecting cover (1-2), a pipe body of the heat exchange pipe (2-1) is tightly and spirally wound with a plurality of circles of gas pipes (2-2), and the gas outlet end of each gas pipe (2-2) is correspondingly communicated with a gas inlet of a combustion cavity of the kiln (3).
2. The sodium silicate kiln of claim 1, wherein: the radiating pipe (3-2) is provided with a plurality of fixing clamping plates (3-4) at even intervals along the axial direction, the middle part of each fixing clamping plate (3-4) protrudes to form a clamping arc which is circumferentially pressed on the outer wall of the radiating pipe (3-2), the two end plate surfaces of each fixing clamping plate (3-4) are close to the outer wall of the furnace body (3-1) and are respectively provided with two connecting holes, and the outer wall of the furnace body (3-1) is provided with a threaded hole for screwing and connecting a screw (3-5) corresponding to the connecting holes.
3. The sodium silicate kiln of claim 1, wherein: the outer wall of the furnace body (3-1) is provided with a groove matched with the outer wall of the radiating pipe (3-2) and close to the groove.
4. The sodium silicate kiln of claim 1, wherein: each section of radiating pipe (3-2) is formed by detachably connecting a plurality of unit pipes in series.
5. The sodium silicate kiln of claim 1, wherein: the pipe end of the elbow pipe (3-3) is hermetically connected with the pipe end of the corresponding radiating pipe (3-2) through a flange.
6. The sodium silicate kiln of claim 1, wherein: the heat exchange body (1-1) is formed by piling a plurality of refractory brick arrays.
7. The sodium silicate kiln of claim 1, wherein: the top and the bottom of the refractory brick are respectively provided with an arc groove (1-7), the arc groove (1-7) at the bottom of the upper refractory brick and the arc groove (1-7) at the top of the lower refractory brick in the two upper and lower adjacent refractory bricks forming the heat exchange body (1-1) can be correspondingly spliced into a circular through hole, and an air pipe (1-8) correspondingly communicated with the corresponding connecting elbow (1-5) is arranged in the air channel (1-4); the heat conducting blocks (1-6) are arranged at the positions of the refractory bricks corresponding to the intersections of the top arc grooves (1-7) and the bottom arc grooves (1-7), and heat conducting silicone grease is coated between the heat conducting blocks (1-6) and the air pipes (1-8).
8. The sodium silicate kiln of claim 1, wherein: the air preheating device (1) and the gas preheating device (2) are correspondingly communicated through a buffer tube (4), and the diameter of a tube body of the buffer tube (4) is larger than the diameters of two ends of the buffer tube.
9. The sodium silicate kiln of claim 1, wherein: and the air preheating device (1) and the gas preheating device (2) are wrapped by heat insulation cotton.
10. The sodium silicate kiln of claim 1, wherein: and a plurality of heat conduction strips (2-3) are annularly arranged on the inner wall of the heat exchange tube (2-1) at intervals.
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| CN202111048101.2A CN113686152B (en) | 2021-09-08 | 2021-09-08 | Sodium silicate kiln |
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| CN101122446A (en) * | 2007-09-12 | 2008-02-13 | 北京科技大学 | Continuous heat-storage type fume residual heat recovering device |
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| CN206695627U (en) * | 2017-05-23 | 2017-12-01 | 山东联科白炭黑有限公司 | A kind of sodium metasilicate saving energy in kiln retracting device |
| CN212082038U (en) * | 2020-03-30 | 2020-12-04 | 湖南红太阳光电科技有限公司 | Furnace body water cooling plant |
| CN112460987A (en) * | 2020-11-25 | 2021-03-09 | 湖南华菱涟源钢铁有限公司 | Heating cover of bell-type furnace and operation method |
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2021
- 2021-09-08 CN CN202111048101.2A patent/CN113686152B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101122446A (en) * | 2007-09-12 | 2008-02-13 | 北京科技大学 | Continuous heat-storage type fume residual heat recovering device |
| CN204177195U (en) * | 2014-10-21 | 2015-02-25 | 潍坊联兴新材料科技股份有限公司 | A kind of calcining furnace |
| CN206695627U (en) * | 2017-05-23 | 2017-12-01 | 山东联科白炭黑有限公司 | A kind of sodium metasilicate saving energy in kiln retracting device |
| CN212082038U (en) * | 2020-03-30 | 2020-12-04 | 湖南红太阳光电科技有限公司 | Furnace body water cooling plant |
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