CN105066722B - Heat-absorbing material-coated grate cooler waste heat recycling device and system - Google Patents
Heat-absorbing material-coated grate cooler waste heat recycling device and system Download PDFInfo
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- CN105066722B CN105066722B CN201510617368.7A CN201510617368A CN105066722B CN 105066722 B CN105066722 B CN 105066722B CN 201510617368 A CN201510617368 A CN 201510617368A CN 105066722 B CN105066722 B CN 105066722B
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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
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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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
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply
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Abstract
The invention provides a heat-absorbing material-coated grate cooler waste heat recycling device and system. The device comprises barrels, wherein heat exchange tubes are arranged in the barrels; each barrel and the corresponding heat exchange tube are in a concentric circle structure; and a heat-absorbing material is coated on the outer surface of each barrel. According to the device and the system, the heat-absorbing material is arranged, so that the waste heat absorption can be further enhanced, the clinker energy consumption is reduced, and the utilization amount of waste heat also can be increased effectively.
Description
Technical field
The present invention relates to a kind of waste heat recovery apparatus of coating heat-absorbing material, belong to UTILIZATION OF VESIDUAL HEAT IN, field of heat exchangers.
Background technology
Grate cooler (abbreviation grate-cooler), is one of cement production process capital equipment.Its basic function includes:
(1) provide suitable clinker cooling speed, to improve the grindability of cement quality and grog；(2) as far as possible improve Secondary Air and
Tertiary air temperature, as combustion air, reduces firing system fuel consumption；(3) by remaining Hot-blast Heating, for cogeneration and coal
Mill is dried；(4) grog is crushed and be cooled to alap temperature, to meet clinker conveyor, storage and cement grinding
Requirement.Grate plate and grate structure are the most important parts of grate-cooler, and it determines the thickness of feed layer of grate, determines air feed again
System and heat recovery efficiency, one, two, three, four generation grate-cooler products are mainly manifested in the improvement of the structure of grate plate and grate.
In manufacture of cement, the basic structure of conventional forth generation grate-cooler is as shown in Figure 1: grate-cooler 4 includes kiln head cover 2, cooling
Machine shell 3, high warm air outlet 5, low temperature wind outlet 6, grog outlet 7 and blower fan 8, wherein grog enters cooling from rotary kiln 1
Machine 4, is then transmitted in the transmission channel in grate-cooler 4, and blower fan 8 is blown in grate-cooler 4, is reduced by wind
The temperature of grog, thus carrying out clinker cooling in transmitting procedure, the grog after cooling is by grog outlet 7 output.
But subject matter present in existing grate-cooler: clinker cooling degree is not enough, the clinker temperature mistake of grog outlet
Height, higher than 200 DEG C.The consequence thereby resulting in is that cement production process energy consumption is higher, affects the quality of finished cement simultaneously again.
It is therefore desirable to researching and developing a kind of new heat reclaim unit, grog can either be fully absorbed very fast in cooler
The sensible heat discharging during cooling, reduces grog energy consumption, can effectively lift utilization rate of waste heat again.
Content of the invention
The present invention is directed to subject matter present in existing grate-cooler it is proposed that more than a kind of grate-cooler of coating heat-absorbing material
Heat recovery equipment.
To achieve these goals, technical scheme is as follows: a kind of grate-cooler waste heat of coating heat-absorbing material returns
Receiving unit, described waste heat recovery apparatus include cylinder, setting heat exchanger tube in cylinder, and described cylinder and heat exchanger tube are concentric circles knots
Structure, the outer surface setting heat-absorbing material of described cylinder.
Preferably, described cylinder is multiple, along the transporting direction of grog, the heat absorption of different drum surface heat-absorbing materials
Ability gradually strengthens.
Preferably, the enhanced amplitude of heat absorption capacity is gradually increased.
A kind of waste heat recovery system of grate cooler, this residual neat recovering system includes radiator, and radiator has base tube, outside base tube
It is with fin, described base tube is connected with the heat exchanger tube in above-mentioned grate-cooler waste heat recovery apparatus.
A kind of grate-cooler waste heat recovery apparatus of filling Heat Conduction Material, described waste heat recovery apparatus include cylinder, in cylinder
Setting heat exchanger tube, described cylinder and heat exchanger tube are concentric structures, fill Heat Conduction Material between described cylinder and heat exchanger tube.
Preferably, Heat Conduction Material is porous media.
Preferably, also including measuring the device for pressure measurement of barrel pressure, described device for pressure measurement is connected with cylinder.
Preferably, arranging fluid flow passageway in described Heat Conduction Material.
Preferably, described cylinder is multiple, along the transporting direction of grog, the leading of different cylinder heat exchanger tube porous media
Heat energy power gradually strengthens.
Preferably, the enhanced amplitude of the capacity of heat transmission is gradually increased.
A kind of circle grate-cooler bootstrap system, described grate-cooler includes shell, grog passage, described shell and grog
Between passage, insulation material is set, waste heat recovery apparatus are set in insulation material, described waste heat recovery apparatus include cylinder, cylinder
Internal setting heat exchanger tube, described cylinder and heat exchanger tube are concentric structures.
Preferably, also including measuring the device for pressure measurement of barrel pressure, described device for pressure measurement is connected with cylinder.
Preferably, described cylinder is multiple, connected by connectivity structure between described cylinder, described pressure measxurement
Device is attached with least one of multiple cylinders.
Preferably, setting fin outside described heat exchanger tube, the interior table of described fin connection heat exchange pipe external surface and cylinder
Face.
Preferably, the extension line of described fin passes through the center of circle of heat exchanger tube.
Preferably, providing holes on described fin.
Preferably, filling heat conduction or accumulation of heat porous material in cylinder.
Preferably, described heat exchanger tube and cylinder are multiple, each heat exchanger tube is separately provided a valve, thus individually
Control the flow of the fluid entering each cylinder.
Preferably, each cylinder is separately provided a device for pressure measurement, by device for pressure measurement come automatic detection
Pressure in each cylinder.
Preferably, described device for pressure measurement can be replaced using temperature measuring equipment or humidity measuring instrument.
Preferably, grate-cooler also includes grog outlet temperature detection means, for detecting the clinker temperature of grog outlet,
Described temperature-detecting device and control system data cube computation, described control system is according to the clinker temperature autocontrol valve of detection
Aperture, thus control enter heat exchanger tube fluid flow；When detection grog outlet temperature too high, then control system from
The aperture of dynamic intensifying valve, increases the flow of the fluid entering heat exchanger tube, if the temperature of detection is too low, control system is automatic
Turn valve opening down, reduce the flow entering heat exchange pipe fluid.
Preferably, described control system control mode is as follows: during outlet temperature t, flow v, represent and meet cement life
The clinker temperature condition produced, above-mentioned outlet temperature t, flow v are normal data, and described normal data is stored in control system
In；
When outlet temperature is changed into t, flow v change is as follows:
V=b*v* (t/t)a, wherein a is parameter, 1.06 < a < 1.10；Preferably, a=1.08；
B is regulation coefficient, (t/t)>1,0.97<b<1.00；It is preferably 0.98；
(t/t)<1,1.00<b<1.04；It is preferably 1.02；
(t/t)=1, b=1；
0.85<t/t<1.15.
In above-mentioned formula, temperature t, t is absolute temperature, and unit is k, speed v, and v unit is m/s, for entering UTILIZATION OF VESIDUAL HEAT IN
The total flow of equipment.
Preferably, the water in described heat exchanger tube can be delivered directly in convector, or pass through intermediate heat transfer
Device, transfers heat to heating water, and then heating water enters back in convector and heated, and described convector includes
Upper header and lower collector pipe and the radiating tube being located at the triangular-section between upper header and lower collector pipe, described radiating tube includes base
Pipe and the fin being located at base tube periphery, the cross section of described base tube is isosceles triangle, and described fin includes first and dissipates
Backing and the second fin, described first fin is to stretch out from isosceles triangle drift angle, and described second fin includes
The multiple fin extending outwardly that are located from two waists of isosceles triangle and from the first fin stretch out many
Individual fin, the second fin extending to same direction is parallel to each other, the end that described first fin, the second fin extend
Portion forms the second isosceles triangle；Described substrate tube arranges first fluid passage, setting second inside described first fin
Fluid passage, described first fluid passage and second fluid channel connection；Described second fin is with respect in the first fin
The face specular that line is located, the distance of adjacent the second described fin is l1, the base length of described isosceles triangle
For w, the length of the waist of described second isosceles triangle is s, meets equation below:
L1/s*100=a*ln (l1/w*100)+b* (l1/w)+c, wherein ln are logarithmic functions, and a, b, c are coefficients, 0.68
< a < 0.72,22 <b < 26,7.5 < c < 8.8；
0.09<l1/s<0.11,0.11<l1/w<0.13；
4mm<l1<8mm；
40mm<s<75mm；
45mm<w<85mm；
The drift angle of isosceles triangle is a, 110 ° < a < 160 °.
Base tube length is l, 0.02 < w/l < 0.08,800mm < l < 2500mm.
Compared with prior art, residual neat recovering system of the present invention has the advantage that
1) the invention provides a kind of new residual neat recovering system, grog can either be fully absorbed very fast in cooler
The sensible heat discharging during cooling, grog outlet temperature is reduced to 100 DEG C about, reduces grog energy consumption, can effectively lift waste heat again
Using.
2) present invention has insulation material between waste heat recovery apparatus and grog passage, can avoid passage high temperature
Air-flow directly washes away waste-heat recovery device, it is to avoid waste-heat recovery device booster or damage because of washing away of high temperature.
3) pass through to arrange device for pressure measurement, close waste heat recovery apparatus in the case that heat exchanger tube occurs booster in time
Fluid flows into heat exchanger tube.
4) pass through to arrange cylinder, radiation heat transfer can be carried out to heat exchanger tube by cylinder or be passed by heat-conducting medium
Lead heat exchange, it is to avoid heat exchanger tube directly and high temperature insulation material directly contact, it is to avoid heat exchanger tube temperature too high generation booster.
5) provide the intelligent control method that a kind of outlet temperature according to grog automatically adjusts fluid flow in heat exchanger tube,
Meet the needs of production, save the energy.
6) frequency according to grate-cooler grog outlet temperature adjust automatically blower fan, thus reaching the purpose of energy saving, with
Realize the intellectuality producing.
7) the invention provides a kind of radiating tube that uses of new residual heat system, and the fin of radiating tube is carried out rationally
Setting, can arrange more fin, therefore have good radiating effect.
8) pass through to arrange heat-absorbing material in drum surface, further enhance the absorption to waste heat.
Brief description
Fig. 1 is the schematic diagram of grate-cooler；
Fig. 2 is grate-cooler waste heat recovery apparatus scheme of installation；
Fig. 3 is the schematic diagram of waste heat recovery apparatus structure；
Fig. 4 is the main structure diagram of radiator in residual neat recovering system；
Fig. 5 is the main structure diagram of radiator in residual neat recovering system；
Fig. 6 is the schematic diagram of the right side observation of Fig. 4.
Reference is as follows:
1st, rotary kiln, 2, kiln head cover, 3, shell, 4, grate-cooler, 5, the outlet of high warm air, 6, the outlet of low temperature wind, 7, grog goes out
Mouthful, 8, blower fan, 9, grog passage, 10, insulation material, 11, waste heat recovery apparatus, 12, communication apparatus, 13, pipe plug, 14, cylinder
Body, 15, heat exchanger tube, 16, device for pressure measurement, 17, porous material, 18, pipe plug, 19, base tube, 20, first fluid passage,
21st, the first fin, the 22, second fin, the 23, second fin, the 24, first waist, the 25, second waist, 26, second fluid lead to
Road, 27, base, 28, heat-absorbing material.
Specific embodiment
Below in conjunction with the accompanying drawings the specific embodiment of the present invention is described in detail.
A kind of manufacture of cement grate-cooler bootstrap system, including grate-cooler, Fig. 1 illustrates a kind of manufacture of cement grate-cooler
4, grate-cooler 4 includes kiln head cover 2, grate-cooler shell 3, high warm air outlet 5, low temperature wind outlet 6, grog outlet 7 and blower fan 8, its
Middle grog enters grate-cooler 4 from rotary kiln 1, is then transmitted in the grog passage 9 in grate-cooler 4, blower fan 8 is to cooling
Blown in machine 4, reduced the temperature of grog by wind, thus carrying out clinker cooling in transmitting procedure, ripe after cooling
Material is by grog outlet 7 output.
Grog from rotary kiln 1 transports in grate-cooler grog passage 9, is cooled down by the wind that blower fan conveys, institute
State setting insulation material 10 between shell 3 and grog passage 9, as shown in Fig. 2 arranging waste heat recovery apparatus in insulation material 10
11.
Certainly, the blower fan in Fig. 1 is only schematic diagram, and blower fan transports cooling wind and blows upwards along grog channel bottom, with
Grog in cooling grog passage.
Be waste heat recovery apparatus are set in insulation material 10, main cause is the discovery that is in operation, and goes out from grog
Mouth 7 clinker temperatures out are too high, thus affecting the quality of finished cement, and also result in the energy consumption mistake in cement production process
Height, therefore by arrange waste heat recovery apparatus reclaim Cement Cold but in heat, further reduce manufacture of cement energy consumption, carry
The quality of high finished cement.
Preferably, insulation material 10 is insulating brick.
Preferably, there is insulation material 10 between described waste heat recovery apparatus 11 and grog passage.As shown in Fig. 2
Two-layer insulating brick is set between waste heat recovery apparatus 11 and grog passage 9.Why insulation material 10 is set, and main cause is to keep away
Exempt from the high-temperature flue gas directly contact in waste heat recovery apparatus 11 and grog passage 9 or directly washed away by high-temperature flue gas, cause remaining
Heat recovery equipment 11 temperature is too high, or directly washes away and be easily damaged it is also possible to avoid the heat exchanger tube in waste heat recovery apparatus 11
Shu Yinwei high temperature causes booster with washing away.
As shown in figure 3, preferably, described waste heat recovery apparatus include at least one cylinder 14, at least one cylinder described
Heat exchanger tube 15 is set in body 14.
By arranging cylinder 14, it is to avoid heat exchanger tube 15 is with insulation material 10 directly contact so that heat exchanger tube passes through cylinder 14
Radiation or pass through porous material heat conduction, it is to avoid there is booster because temperature is too high in heat exchanger tube 15.
By arranging cylinder, Another reason is once there is booster, then avoid fluid to leak, destroy insulation material.
Preferably, having certain space between cylinder 14 and heat exchanger tube 15, described space as be preferably filled with for
The porous material 17 of heat conduction or accumulation of heat.
Preferably, also including measuring the device for pressure measurement 16 of barrel pressure.Described device for pressure measurement 16 is connected to
Cylinder 14, by measuring the pressure in cylinder 14, to check whether heat exchanger tube 15 occurs booster, once there is booster, then pressure
The measurement data of measurement apparatus 16 will be abnormal, then close the Fluid valve entering in heat exchanger tube 15 in time.
Preferably, described system also includes control system and valve (not shown), described control system and valve enter
Row data cube computation, the opening and closing for control valve and the size of valve flow.Described control system and device for pressure measurement 16
Carry out data cube computation, for detecting the pressure of device for pressure measurement 16.Once the device for pressure measurement 16 of control system detection
Pressure exceedes predetermined value, then show pressure anomaly it is likely that heat exchanger tube 15 occur booster, now control system control valve from
Dynamic closing.By above-mentioned automatic control function so that monitoring process realizes automation.
Preferably, described waste heat recovery apparatus 11 include multiple cylinders 14, between described cylinder 14, pass through communication apparatus
12 are connected, and described device for pressure measurement 16 is attached with any one of multiple cylinders 14.
By arrange communication apparatus 12 so that multiple cylinder 14 connection get up, once some cylinder occur booster, then because
For, the reason connection, device for pressure measurement 14 also can detect pressure anomaly at any time, then also can automatically control Fluid valve and close,
Fluid is avoided to enter in heat exchanger tube.The quantity of device for pressure measurement 16 so can be reduced, only by one or quantity
Few device for pressure measurement, thus realize the pressure detecting of multiple cylinders.
Preferably, insulation material 10 has, with cylinder 14 lower surface, the shape matching, so that described cylinder 14
The outer surface of bottom is sticked together with insulation material 10, and the inner surface of described heat exchanger tube 15 and the bottom of cylinder 14 has certain
Distance.
Sticked together by the outer surface and insulation material 10 of the bottom of cylinder 14 it is ensured that showing outside cylinder 14 and protecting
Heat transfer between adiabator 10 is it is ensured that heat is delivered to cylinder 14 from insulation material 10 by way of heat transfer.Heat exchanger tube
15 have a certain distance with the inner surface of the bottom of cylinder 14, realize radiation heat transfer, it is to avoid heat exchanger tube 15 is direct with cylinder 14
Contact causes temperature too high, thus causing booster phenomenon to occur.
Preferably, described cylinder 14 is circle, as shown in Figure 2.Described heat exchanger tube 15 and cylinder 14 are concentric structure.
Described heat exchanger tube 15 is outside to arrange fin, and described fin connects the inner surface of heat exchanger tube 15 outer surface and cylinder 14.
Preferably, the extension line of described fin passes through the center of circle of heat exchanger tube 15.
Preferably, each heat exchanger tube 15 is absolute construction, there is single entrance and exit.Each heat exchanger tube 15 is single
Solely a valve is set, by being separately provided valve, control system can individually control each valve, thus individually control entering
The flow of the fluid of each cylinder.
Certainly, preferably, each cylinder 14 can be separately provided a device for pressure measurement 16, filled by pressure measxurement
Put 16 pressure coming in each cylinder of automatic detection, when detecting pressure anomaly in certain cylinder 14, be then automatically switched off this cylinder 14
Valve, stop fluid from entering the heat exchanger tube 15 of this cylinder 14.
Preferably, because setting communication apparatus 12, the few device for pressure measurement of quantity 16 therefore can be arranged, such as only
Setting one.Now, control system detects pressure and occurs extremely, then to control all of valve of closing or total valve.
Preferably, device for pressure measurement 16 can be replaced using temperature measuring equipment.Temperature measuring equipment and control
System carries out data cube computation, and when the temperature of detection is less than certain numerical value, that is, measurement data will be abnormal, then control system is closed in time
Close the Fluid valve entering in heat exchanger tube 15.
Preferably, device for pressure measurement 16 can be replaced using moisturt register measurement apparatus.Humidity measuring instrument and control
System processed carries out data cube computation, and when the humidity of detection is higher than certain numerical value, that is, measurement data will be abnormal, then control system is timely
Close the Fluid valve entering in heat exchanger tube 15.
Preferably, filling heat conduction or accumulation of heat porous material 17 in cylinder 14.By arranging porous media, so that
Unnecessary heat storage gets up, and can transfer heat to heat exchanger tube 15 by way of heat conduction simultaneously.
Preferably, providing holes on described fin, the main purpose of providing holes being to ensure that once there is booster, ensure that
The circulation of fluid, so that pressure-detecting device 16 detects the change of pressure.
Preferably, arranging fluid flow passageway in described porous media, so that detection internal fluid pressure.
The structure of cylinder 14 as shown in Figure 3, cylinder 14 two ends are respectively provided with pipe plug 13 and 18.Fluid flows from one end
Enter, flow out from the other end.
Certainly, preferably, the pipe between multiple cylinder 14 can be parallel-connection structure, for example, in the stream of heat exchanger tube 15
Body inlet and outlet arranges collector, and the collector of similar convector is such.
Preferably, the pipe between multiple cylinders 14 can be cascaded structure, i.e. heat exchanger tube between adjacent cylinder 14
15 are connected as the structure of series connection by connecting tube.So only need to a valve.
Preferably, in this case, the outer surface of described heat exchanger tube 15 coats heat-absorbing material, to strengthen to radiation
Absorption.
Preferably, along the transporting direction of grog, the heat absorption capacity of heat exchanger tube 15 heat-absorbing material of different cylinders 14 by
Cumulative strong, it is further used as preferably, the enhanced amplitude of heat absorption capacity is gradually increased.It is found through experiments, by being arranged such, can
To improve exhaust-heat absorption ability 15% about.And by being arranged such, so that the heat absorption of heat exchanger tube 15 entirety is uniformly, temperature
Degree difference diminishes it is ensured that heat exchanger tube 15 bulk life time, it is to avoid part heat exchanger tube 15 temperature is too high, causes constantly frequently more
Change.
Preferably, preferably, along grog transporting direction, porous between different cylinders 14 and heat exchanger tube 15 is situated between
The capacity of heat transmission of matter gradually strengthens, and is further used as preferably, the enhanced amplitude of the capacity of heat transmission is gradually increased.It is found through experiments,
By being arranged such it is provided that exhaust-heat absorption ability provides 16% about.Before main cause is similar to.
Preferably, preferably, along grog transporting direction, porous between different cylinders 14 and heat exchanger tube 15 is situated between
The heat storage capacity of matter gradually strengthens, and is further used as preferably, the enhanced amplitude of accumulation of heat heat energy power is gradually increased.Main cause is similar to
The reason above capacity of heat transmission increases.
Preferably, the outer surface setting heat-absorbing material 28 of cylinder 14.Main cause is because insulation material 10 and cylinder
Heat exchange between 14 there is also a part of radiation heat transfer it is therefore desirable to arrange heat-absorbing material 28 to increase caloric receptivity.
Preferably, along the transporting direction of grog, the heat absorption capacity of different cylinder 14 surface heat-absorbing materials 28 gradually increases
By force, it is further used as preferably, the enhanced amplitude of heat absorption capacity is gradually increased.Before main cause is similar to.
Preferably, the outside setting of cylinder 14 is raised.Along the transporting direction of grog, the raised height of different drum surfaces
It is gradually increased, be further used as preferably, the amplitude of increase is gradually increased.Before main cause is similar to.
Preferably, the outside setting of cylinder 14 is raised.Along the transporting direction of grog, the raised density of different drum surfaces
It is gradually increased, be further used as preferably, the amplitude of increase is gradually increased.Before main cause is similar to.
In this programme, can be by arranging the porous material 17 of different thermal conductivity factors in different parts, it is possible to achieve different
The different enhancings of the absorption heat energy power of position heat exchanger tube 15.The porous material 17 of unlike material can also be directly selected, to obtain
Different heat absorption capacities.
Preferably, described grate-cooler also includes grog outlet temperature detection means, for detecting the ripe of grog outlet
Material temperature degree.Described temperature-detecting device and control system data cube computation.Described control system is automatic according to the clinker temperature of detection
The aperture of control valve, thus control the flow of the fluid entering heat exchanger tube.
When the temperature of the grog outlet of detection is too high, then the aperture of automatic intensifying valve, increases the fluid entering heat exchanger tube
Flow, if the temperature of detection is too low, automatically turn valve opening down, reduce the flow entering heat exchanger tube 15 fluid.Pass through
Automatically adjust fluid flow, thus automatically adjusting the quantity of the fluid participating in heat exchange, thus realizing exporting 7 clinker temperatures to grog
Regulation, meet needs on producing it is ensured that cement quality.
Described control system is capable of automatically adjusting flow according to outlet temperature.Control mode is as follows: outlet temperature
During degree t, flow v, represent the clinker temperature condition meeting manufacture of cement.Above-mentioned outlet temperature t, flow v are normal data.Institute
The normal data stated stores in the controls.
When outlet temperature is changed into t, flow v change is as follows:
V=b*v* (t/t)a, wherein a is parameter, 1.06 < a < 1.10；Preferably, a=1.08；
B is regulation coefficient, (t/t)>1,0.97<b<1.00；It is preferably 0.98；
(t/t)<1,1.00<b<1.04；It is preferably 1.02；
(t/t)=1, b=1；
0.85<t/t<1.15.
In above-mentioned formula, temperature t, t is absolute temperature, and unit is k, speed v, and v unit is m/s, for entering waste heat recovery
The total flow of equipment.
Preferably, when the heat exchanger tube 15 of multiple cylinders 14 is parallel-connection structure, when flow is adjusted, often
In the heat exchanger tube 15 of individual cylinder 14, the ratio increasing or reducing of flow is identical.
Preferably, the ratio difference that the flow of the heat exchanger tube 15 of each cylinder 14 increases or reduces, along grog
Transporting direction, the ratio increasing or reducing is less and less.Further preferably, increase or reduce ratio amplitude increasingly
Little.It is found through experiments, the setting being changed by flowrate amplitude, so that the data controlling is more accurate, error is less, energy
Enough reduce by 30% about error.
By above-mentioned formula, it is possible to achieve automatically adjust the intellectuality of flow according to outlet temperature, save and can transport,
Improve production efficiency.
Preferably, multigroup normal data can be inputted in the controls.When two groups or multigroup reference data occur
In the case of it is provided that user select reference data interface it is preferred that control system can automatically select (1-t/t)2
Minimum one of value.
Preferably, described control system includes blower fan frequency regulation arrangement, can be according to the clinker temperature of grog outlet 7
Control blower fan frequency, thus adjusting the flow entering the wind of cooling grog in grate-cooler.When temperature is too high, then automatically tune up blower fan
Frequency, increase air output, if detection temperature too low, automatically reduce blower fan frequency, reduce air output.
Combine it is of course possible to control blower fan FREQUENCY CONTROL with fluid flow, control grog outlet temperature together.
Preferably, the fluid of heating is used for Waste Heat Generation use in heat exchanger tube 15.
Preferably, heat exchanger tube 15 connects convector, thus the water of heating is used for heating.
Preferably, the water in heat exchanger tube 15 can be delivered directly in convector it is also possible to pass through heat exchanger, will
Heat transfer enters back in convector and is heated to heating water, then heating water.Described radiator include upper header and
Lower collector pipe and the radiating tube being located at upper header and lower collector pipe.
As shown in Figure 4,5, the radiating tube that described radiator uses, described radiating tube includes base tube 19 and is located at base tube 19
The fin 21-23 of periphery, as shown in Figure 4,5, the cross section of described base tube 19 is isosceles triangle, and described fin includes the
One fin 21 and the second fin 22,23, described first fin 22 stretches out from isosceles triangle drift angle, described
Second fin 22,23 includes the multiple fin 22 extending outwardly being located from two articles of waists of isosceles triangle and from the
Multiple fin 23 that one fin stretches out, the second fin 22,23 extending to same direction is parallel to each other, for example,
As illustrated, the second fin 22,23 stretching out from isosceles triangle the second waist 25 (waist on the left side) is parallel to each other, from etc.
The second fin 22,23 that lumbar triangle shape the first waist 24 (i.e. the waist on the right) stretches out is parallel to each other, described first fin
21st, the end that the second fin 22,23 extends forms the second isosceles triangle.As shown in figure 4, the waist of the second isosceles triangle
Length is s；Described base tube 19 is internal to arrange first fluid passage 20, and described first fin 21 is internal to arrange second fluid passage
26, described first fluid passage 21 connects with second fluid passage 26.For example, as described in Figure 4, in isosceles triangle corner position
Connection.
By structure setting so, so that base tube 19 is outside arranges multiple fin, increase radiating, simultaneously the
The internal setting fluid passage of one fin 21 is so that fluid enters in the first fin 21, directly with the first fin 21 phase
The second fin 23 even carries out heat exchange, increased heat-sinking capability.
General radiating tube is all surrounding or both sides setting fin, but finds in engineering, contacting with wall
Generally heat convection effect is bad for the fin of side because air wall side flow relatively poor, therefore this
Bright isosceles triangle base 27 is set to plane, therefore install fin when, can be directly tight with wall by plane
Contact, compared with other radiators, can greatly save installing space, it is to avoid the waste in space, take special dissipating simultaneously
Backing form is it is ensured that meet optimal radiating effect.
Preferably, the face specular that described second fin 22,23 is located with respect to the first fin 21 center line, that is,
The face specular that the line at the midpoint being located with respect to summit and the base of isosceles triangle is located.
Preferably, the second fin extends perpendicular to two waists of the second isosceles triangle.
In the case that the length on the side of isosceles triangle is certain, the first fin 21 and the second fin 22,23 are longer, then
Heat transfer effect is better in theory, finds, when the first fin 21 and the second fin 22,23 reach a fixed length in process of the test
When spending, then heat transfer effect just increase very inconspicuous, be primarily due to first radiating 21 and the second fin length
22nd, 23 increase, the temperature in fin end is also more and more lower, reduces to a certain extent with temperature, then heat exchange can be led to imitate
Really inconspicuous, the cost that also add material on the contrary and the space occupying considerably increasing radiator.Meanwhile, heat transfer process
In, if the spacing between the second fin is too little, also easily cause the deterioration of heat transfer effect, because with radiating length of tube
Increase, in air uphill process, boundary layer is thickening, causes boundary layer between abutting fins mutually to coincide, deteriorate heat transfer, radiating
Length of tube is too low or the second fin between spacing cause greatly very much heat exchange area to reduce, have impact on the transmission of heat, therefore
In the distance of the second adjacent fin, the length of the length of side of isosceles triangle, the first fin and the second fin and dissipate
An optimized size relationship is met between hot device length thereof.
Therefore, the present invention is optimal the dissipating being summed up by thousands of test datas of multiple various sizes of radiators
The dimensionally-optimised relation of hot device.
The distance of described the second adjacent fin is l1, and the base length of described isosceles triangle is w, described second
The length of the waist of isosceles triangle is s, and the relation of above-mentioned three meets equation below:
L1/s*100=a*ln (l1/w*100)+b* (l1/w)+c, wherein ln are logarithmic functions, and a, b, c are coefficients, 0.68
< a < 0.72,22 <b < 26,7.5 < c < 8.8；
0.09<l1/s<0.11,0.11<l1/w<0.13
4mm<l1<8mm
40mm<s<75mm
45mm<w<85mm
The drift angle of isosceles triangle is a, 110 ° < a < 160 °.
Preferably, base tube length is l, 0.02 < w/l < 0.08,800mm < l < 2500mm.
Preferably, a=0.69, b=24.6, c=8.3.
It should be noted that adjacent second fin apart from l1 be from the center of the second fin start to count away from
From as shown in Figure 1.
Tested again after result of calculation, by calculating the numerical value on border and median, the result of gained is basic
Above match with formula, substantially within 3.54%, maximum relative error is less than 3.97% to error, and mean error is
2.55%.
Preferably, the distance of described the second adjacent fin is identical.
Preferably, the width of the first fin 21 is greater than the width of the second fin.
Preferably, the width of the first fin 21 is b1, and the width of the second fin is b2, wherein 2.2*b2 <b1 < 3.1*
b2；
Preferably, 0.9mm <b2 < 1mm, 2.0mm <b1 < 3.2mm.
Preferably, the width of second fluid passage 26 is 0.85-0.95 times of the width of the second fin, preferably
0.90-0.92 times.
Width b1, b2 herein refers to the mean breadth of fin.
Although the present invention is disclosed as above with preferred embodiment, the present invention is not limited to this.Any art technology
Personnel, without departing from the spirit and scope of the present invention, all can make various changes or modifications, and therefore protection scope of the present invention should
When being defined by claim limited range.
Claims (2)
1. a kind of grate-cooler waste heat recovery apparatus of coating heat-absorbing material are it is characterised in that described waste heat recovery apparatus include cylinder
Body, setting heat exchanger tube in cylinder, described cylinder and heat exchanger tube are concentric structures, the outer surface setting heat absorption material of described cylinder
Material；Setting fin outside described heat exchanger tube, described fin connects the inner surface of heat exchange pipe external surface and cylinder；
Described cylinder is multiple, and along the transporting direction of grog, the heat absorption capacity of different drum surface heat-absorbing materials gradually strengthens；
The enhanced amplitude of heat absorption capacity is gradually increased.
2. it is characterised in that this residual neat recovering system includes radiator, radiator has base to a kind of waste heat recovery system of grate cooler
Pipe, is with fin outside base tube, the heat exchanger tube phase in described base tube and the grate-cooler waste heat recovery apparatus described in claim 1
Connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510617368.7A CN105066722B (en) | 2015-09-24 | 2015-09-24 | Heat-absorbing material-coated grate cooler waste heat recycling device and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510617368.7A CN105066722B (en) | 2015-09-24 | 2015-09-24 | Heat-absorbing material-coated grate cooler waste heat recycling device and system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105066722A CN105066722A (en) | 2015-11-18 |
| CN105066722B true CN105066722B (en) | 2017-01-25 |
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| CN201510617368.7A Expired - Fee Related CN105066722B (en) | 2015-09-24 | 2015-09-24 | Heat-absorbing material-coated grate cooler waste heat recycling device and system |
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| CN106766963B (en) * | 2017-01-12 | 2018-08-10 | 中国科学院力学研究所 | A kind of cement clinker production line grate-cooler afterheat utilizing system |
| CN106839785A (en) * | 2017-01-12 | 2017-06-13 | 中国科学院力学研究所 | A kind of cement clinker production line grate-cooler inwall waste heat takes thermal |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2151429Y (en) * | 1992-12-23 | 1993-12-29 | 南京化工学院 | Energy saver for production of steam by waste heat from fritting furnace |
| CN2576522Y (en) * | 2002-10-15 | 2003-10-01 | 刘振生 | Passenger tail-gas after-heat recovering, plate-heating apparatus |
| CN201256513Y (en) * | 2008-08-19 | 2009-06-10 | 杨斌 | Inner box temperature cooling device for full enclosed box |
| CN204944222U (en) * | 2015-09-24 | 2016-01-06 | 山东大学 | A kind of grate-cooler waste heat recovery apparatus and system applying heat-absorbing material |
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