CN105115310B - A kind of waste heat recovery system of grate cooler of automatic detection booster - Google Patents
A kind of waste heat recovery system of grate cooler of automatic detection booster Download PDFInfo
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- CN105115310B CN105115310B CN201510617636.5A CN201510617636A CN105115310B CN 105115310 B CN105115310 B CN 105115310B CN 201510617636 A CN201510617636 A CN 201510617636A CN 105115310 B CN105115310 B CN 105115310B
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Abstract
The invention provides the waste heat recovery system of grate cooler of a kind of automatic detection booster, described grate-cooler includes shell, grog passage, between described shell and grog passage, insulation material is set, waste heat recovery apparatus is set in insulation material, described waste heat recovery apparatus includes at least one cylinder, arranging heat exchanger tube in described cylinder, the pressure gauge measuring barrel pressure is connected with cylinder；Described system also includes control system and valve, and described valve is located on heat exchanger tube, and described control system and valve carry out data cube computation, for controlling the opening and closing degree of valve；Described control system and pressure gauge carry out data cube computation, for detecting the pressure of pressure gauge, once the pressure of the pressure gauge of control system detection exceedes predetermined value, now control system control valve door and are automatically switched off.The grate-cooler of the present invention can detect occurring and closing the fluid entered in heat exchanger tube in time of booster automatically, improves the safety of system.
Description
Technical field
The present invention relates to the heat recovery system of a kind of grate cooler, especially relate to the grate cooler heat recovery system in manufacture of cement, belong to the field of heat exchangers of F27D UTILIZATION OF VESIDUAL HEAT IN, F28D.
Background technology
Grate cooler (abbreviation grate-cooler), is a kind of capital equipment in cement production process.Its basic function includes: (1) provides suitable clinker cooling speed, to improve the grindability of cement quality and grog；(2) improve secondary wind and tertiary air temperature as far as possible, as combustion air, reduce firing system fuel consumption；(3) by remaining Hot-blast Heating, grind for cogeneration and coal and dry；(4) grog crushed and be cooled to alap temperature, to meet the requirement of clinker conveyor, storage and cement grinding.Grate plate and grate structure are the most important parts of grate-cooler, which determine the thickness of feed layer of grate, determine again air feed system and heat recovery efficiency, and 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, grate-cooler shell 3, high warm air outlet 5, low warm air outlet 6, grog outlet 7 and blower fan 8, wherein grog enters grate-cooler 4 from rotary kiln 1, then the transmission channel in grate-cooler 4 is transmitted, blower fan 8 is blown in grate-cooler 4, the temperature of grog is reduced by wind, thus carrying out clinker cooling in transmitting procedure, the grog after cooling is by grog outlet 7 output.
But the subject matter existed in existing grate-cooler: clinker cooling degree is not enough, the clinker temperature of grog outlet is too high, generally more than 200 DEG C.The consequence thereby resulted in is that cement production process energy consumption is higher, affects again the quality of finished cement simultaneously.
It is therefore desirable to research and develop a kind of novel heat reclaim unit, the sensible heat that grog discharges during very fast cooling in cooler can either be fully absorbed, reduce grog energy consumption, can effectively promote again utilization rate of waste heat.
Summary of the invention
The present invention is directed to the subject matter existed in existing grate-cooler, it is proposed that the waste heat recovery system of grate cooler of a kind of automatic detection booster.
To achieve these goals, technical scheme is as follows: the waste heat recovery system of grate cooler of a kind of automatic detection booster, described grate-cooler includes shell, grog passage, arranges insulation material between described shell and grog passage, arranges waste heat recovery apparatus in insulation material.
As preferably, between described waste heat recovery apparatus and grog passage, there is insulation material.
As preferably, described waste heat recovery apparatus includes at least one cylinder, arranges heat exchanger tube at least one cylinder described.
As preferably, also including the pressure gauge measuring barrel pressure；Described system also includes control system and valve, and described control system and valve carry out data cube computation, for controlling the opening and closing degree of valve；Described control system and pressure gauge carry out data cube computation, for detecting the pressure of pressure gauge, once the pressure of the pressure gauge of control system detection exceedes predetermined value, now control system control valve door and be automatically switched off, it is to avoid fluid enters heat exchanger tube.
As preferably, described waste heat recovery apparatus includes multiple cylinder, is connected by connectivity structure between the plurality of cylinder, and described pressure gauge is attached with any one of multiple cylinders.
As preferably, the outer surface of the bottom of described cylinder and insulation material stick together, and the inner surface of the bottom of described heat exchanger tube and cylinder has certain distance.
As preferably, described cylinder is rectangle, and cylinder bottom is plane.
As preferably, described heat exchanger tube is many, and two at least adjacent pipe heat pipes are linked together by swan neck.
As preferably, described heat exchanger tube has multiple rows of, and often row's heat exchanger tube has many.
As preferably, filling heat conduction or accumulation of heat porous material in cylinder.
As preferably, described pressure gauge can use temperature measuring equipment or humidity measuring instrument to replace.
As preferably, grate-cooler also has grog outlet temperature detecting device, for detecting the clinker temperature of grog outlet, described temperature-detecting device is connected with controlling system data, the aperture of the clinker temperature autocontrol valve that described control system detects according to outlet temperature detecting device, thus controlling to enter the flow of the fluid of heat exchanger tube；When the temperature of the grog outlet of detection is too high, then control the aperture of the automatic intensifying valve of system, increase the flow of the fluid entering heat exchanger tube, if the temperature of the grog outlet of detection is too low, then control system and automatically turn valve opening down, reduce the flow entering heat exchanger tube fluid.
As preferably, described control system control mode is as follows: outlet temperature T represents the clinker temperature condition meeting manufacture of cement, entering the fluid flow V of waste heat recovery apparatus during temperature T, above-mentioned outlet temperature T, flow V are normal data, and described normal data stores in the controls；
When outlet temperature becomes t time, 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, and flow V, v unit is m/s, for entering the total flow of waste heat utilization equipment.
nullAs preferably，Water in described heat exchanger tube can be delivered directly in convector，Or pass through Intermediate Heat Exchanger，Transfer heat to heating water，Then heating water enters back in convector and heats，Described convector includes upper header and lower collector pipe and the radiating tube of the triangular-section between upper header and lower collector pipe，Described radiating tube includes base tube and is positioned at the fin that matrix is peripheral，The cross section of described base tube is isosceles triangle，Described fin includes the first fin and the second fin，Described first fin is to stretch out from isosceles triangle drift angle，Described second fin includes the multiple fin facing out extension from the two of isosceles triangle waist places and from the first outward extending multiple fin of fin，The second fin extended to same direction is parallel to each other,Described first fin、The end that second fin extends forms the second isosceles triangle；Described substrate tube arranges first fluid passage, arranges second fluid passage, described first fluid passage and second fluid channel connection inside described first fin；Described second fin is relative to the face specular at the first fin center line place, and the distance of adjacent the second described fin is L1, and the base length of described isosceles triangle is W, and 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 is logarithmic function, 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 waste heat recovery system of grate cooler, the sensible heat that grog discharges during very fast cooling in cooler can either be fully absorbed so that the outlet temperature of grog becomes 100 DEG C, reduce ton grog energy consumption, can effectively promote again the utilization of waste heat.
2) present invention has insulation material between waste heat recovery apparatus and grog passage, it is possible to avoid the air-flow of high temperature in passage directly to wash away waste-heat recovery device, it is to avoid waste-heat recovery device booster or damage because of washing away of high temperature.
3) by arranging pressure gauge, the fluid closing waste heat recovery apparatus when heat exchanger tube generation booster in time flows into heat exchanger tube.
4) by arranging cylinder, it is possible to carry out radiation heat transfer by cylinder to heat exchanger tube or undertaken conducting heat exchange by heat-conducting medium, it is to avoid heat exchanger tube directly directly contacts with the insulation material of high temperature, it is to avoid the too high generation booster of heat exchanger tube temperature.
5) provide the intelligent control method that a kind of outlet temperature according to grog is automatically adjusted in heat exchanger tube fluid flow, meet the needs of production, saved the energy.
6) according to grate-cooler grog outlet temperature automatically adjust blower fan frequency, thus reach save the energy purpose, with realizes production intellectuality.
7) the invention provides the radiating tube that a kind of new residual heat system uses, and the fin of radiating tube is rationally arranged, it is possible to arrange more fin, therefore there is good radiating effect.
Accompanying drawing explanation
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 TV structure schematic diagram of radiator in residual neat recovering system；
Fig. 5 is the fluid passage relative position schematic diagram of radiator in residual neat recovering system；
Fig. 6 is the schematic diagram of the right side observation of Fig. 4.
Accompanying drawing labelling is as follows:
1, rotary kiln, 2, kiln head cover, 3, shell, 4, grate-cooler, 5, high warm air exports, 6, low warm air exports, 7, grog exports, 8, blower fan, 9, grog passage, 10, insulation material, 11, waste heat recovery apparatus, 12, connectivity structure, 13, pipe plug, 14, cylinder, 15, heat exchanger tube, 16, pressure gauge, 17, porous material, 18, swan neck, 19, base tube, 20, first fluid passage, 21, first fin, 22, second fin, 23, second fin, 24, first waist, 25, second waist, 26, second fluid passage, 27, base, 28, valve.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.
A kind of manufacture of cement waste heat recovery system of grate cooler, 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 warm air outlet 6, grog outlet 7 and blower fan 8, wherein grog enters grate-cooler 4 from rotary kiln 1, then the grog passage 9 in grate-cooler 4 is transmitted, blower fan 8 is blown in grate-cooler 4, the temperature of grog is reduced by wind, thus carrying out clinker cooling in transmitting procedure, the grog after cooling is by grog outlet 7 output.
Grog from rotary kiln 1 transports in grate-cooler grog passage 9, and the wind carried by blower fan is cooled down, and arranges insulation material 10 between described shell 3 and grog passage 9, as in figure 2 it is shown, arrange waste heat recovery apparatus 11 in insulation material 10.
Certainly, the blower fan in Fig. 1 is only schematic diagram, and blower fan transports cooling air along grog channel bottom to blowing up, to cool down the grog in grog passage.
Be waste heat recovery apparatus is set in insulation material, main cause is the discovery that is in operation, the clinker temperature exporting out from grog is too high, thus affecting the quality of finished cement, but also cause the energy consumption in cement production process too high, therefore by arrange waste heat recovery apparatus reclaim Cement Cold but in heat, reduce further the energy consumption of manufacture of cement, improve the quality of finished cement.
As preferably, insulation material 10 is insulating brick.
As preferably, between described waste heat recovery apparatus 11 and grog passage, there is insulation material 10.As in figure 2 it is shown, arrange two-layer insulating brick between waste heat recovery apparatus 11 and grog passage 9.Why insulation material is set, main cause is to avoid waste heat recovery apparatus 11 directly contact with the high-temperature flue gas in grog passage 9 or directly washed away by high-temperature flue gas, cause waste heat recovery apparatus temperature too high, or directly wash away and be easily damaged, it is also possible to avoid the heat-exchanging tube bundle in waste heat recovery apparatus because high temperature causes booster with washing away.
As in figure 2 it is shown, as preferably, described waste heat recovery apparatus includes at least one cylinder 14, arranges heat exchanger tube 15 at least one cylinder described.
By arranging cylinder 14, it is to avoid heat exchanger tube directly contacts with insulation material so that heat exchanger tube is by the radiation of cylinder 14 or by porous material heat conduction, it is to avoid booster occurs heat exchanger tube because temperature is too high.
By arranging cylinder, Another reason is once there is booster, then avoid fluid to leak, destroy insulation material.
As preferably, having certain space between cylinder 14 and heat exchanger tube 15, described space is as being preferably filled with the porous material 17 for heat conduction or accumulation of heat.
As preferably, also including the pressure gauge 16 measuring barrel pressure.Described pressure gauge 16 is connected to cylinder 14, by measuring the pressure in cylinder 14, check whether heat exchanger tube 15 booster occurs, once there is booster, then the measurement data of pressure gauge 16 will be abnormal, then close the Fluid valve entered in heat exchanger tube 15 in time.
As preferably, described system also includes control system and valve 28, and described control system and valve 28 carry out data cube computation, for controlling the opening and closing of valve 28 and the size of valve 28 flow.Described control system and pressure gauge 16 carry out data cube computation, for detecting the pressure of pressure gauge 16.Once the pressure of the pressure gauge 16 of control system detection exceedes predetermined value, then show pressure anomaly, it is likely that booster occurs heat exchanger tube 15, now control system control valve door 28 and be automatically switched off.By above-mentioned automatic control function so that monitoring process realizes automatization.
As preferably, described waste heat recovery apparatus 11 includes multiple cylinder 14, is connected by connectivity structure 12 between described cylinder 14, and described pressure gauge 16 is attached with any one of multiple cylinders 14.
By arranging connectivity structure 12 so that the connection of multiple cylinders 14 is got up, once some cylinder generation booster, then because of the reason of connection, pressure gauge 14 also can detect pressure anomaly at any time, then also can automatically control Fluid valve and close, it is to avoid fluid enters in heat exchanger tube.So can reduce the quantity of pressure gauge 16, only by the pressure gauge that or quantity are few, thus realizing the pressure detecting of multiple cylinder.
As preferably, the outer surface of the bottom of described cylinder 14 and insulation material stick together, and the inner surface of the bottom of described heat exchanger tube 15 and cylinder 14 has certain distance.
Sticked together by the outer surface of the bottom of cylinder 14 and insulation material, it is ensured that the heat transmission between the outer performance of cylinder 14 and insulation material, it is ensured that heat is delivered to cylinder from the mode of the logical heat transfer of insulation material.The inner surface of the bottom of heat exchanger tube 15 and cylinder 14 has certain distance, it is achieved radiation heat transfer, it is to avoid heat exchanger tube directly contacts with cylinder and causes temperature too high, thus causing booster phenomenon to occur.
As preferably, described cylinder 14 is rectangle, and cylinder bottom is plane.
As preferably, described heat exchanger tube 15 is many, and two at least adjacent pipe heat pipes are linked together by swan neck 18.As preferably, being connected by swan neck 18 between the heat exchanger tube in each cylinder, so that heat exchanger tube 15 series connection in each cylinder 14 is a heat exchanger tube.
As preferably, described heat exchanger tube 15 has multiple rows of, and often row's heat exchanger tube has many.Such as, as in figure 2 it is shown, be perpendicular to grog channel direction to arrange two row's heat exchanger tubes.
As preferably, the multiple heat exchanger tubes in each cylinder 14 are a heat exchanger tube 15 by elbow series connection, have independent entrance and exit, and the heat exchanger tube 15 in multiple cylinder 14 is parallel-connection structure.So, the heat exchanger tube of each cylinder 14 is separately provided a valve, and by being separately provided valve, control system can individually control each valve, thus individually controlling to enter the flow of the fluid of each cylinder.
Certainly, as preferably, each cylinder can be separately provided a pressure gauge 16, automatically the pressure in each cylinder is detected by pressure gauge 16, when certain cylinder internal pressure of detection is abnormal, then it is automatically switched off the valve of this cylinder, stops fluid to enter the heat exchanger tube of this cylinder.
As preferably, because arranging connectivity structure 12, therefore the pressure gauge that quantity is few can be set, for instance only arrange one.Now, it is abnormal that control system detects that pressure occurs, then can control to close all of valve or total valve.
As preferably, it is possible to use temperature measuring equipment replaces pressure gauge 16.Temperature measuring equipment and control system carry out data cube computation, and when the temperature of detection is lower than certain numerical value, namely measurement data will be abnormal, then control system and close the Fluid valve entered in heat exchanger tube 15 in time.
As preferably, it is possible to use humidity measuring instrument replaces pressure gauge 16.Humidity measuring instrument and control system carry out data cube computation, and when the humidity of detection is higher than certain numerical value, namely measurement data will be abnormal, then control system and close the Fluid valve entered in heat exchanger tube 15 in time.
As preferably, filling heat conduction or accumulation of heat porous material 17 in cylinder 14.By arranging porous material 17, it is possible to make unnecessary heat storage, heat exchanger tube 15 can be transferred heat to by the mode of heat conduction simultaneously.
As preferably, described porous material 17 arranging fluid flow passageway, in order to detection internal fluid pressure.
The structure of cylinder 14 as shown in Figure 3, cylinder 14 one end is closed, and the other end arranges pipe plug 13, and pipe is U-tube structure.
Certainly, as preferably, many pipes in cylinder 14 can be parallel-connection structure, for instance, fluid inlet and outlet at heat exchanger tube 15 arrange collector, and the collector of similar convector is such.
As preferably, the pipe between multiple cylinders 14 can be cascaded structure, and namely the heat exchanger tube 15 between adjacent cylinder 14 is connected as the structure of series connection by connecting tube.So have only to a valve.
As preferably, in such cases, the outer surface heat-absorbing material of described heat exchanger tube 15, to strengthen the absorption to radiation.
As preferably, along the transporting direction of grog, the heat absorption capacity of heat exchanger tube 15 heat-absorbing material of different cylinders 14 strengthens gradually, is further used as preferably, and the amplitude that heat absorption capacity strengthens is gradually increased.It is found through experiments, by such setting, it is possible to improve exhaust-heat absorption ability about 15%.And by so arranging, it is possible to the heat absorption making heat exchanger tube overall is uniform, and temperature contrast diminishes, it is ensured that heat exchanger tube bulk life time, it is to avoid part heat exchanger tube temperature is too high, causes and constantly changes frequently.
As preferably, as preferably, along the transporting direction of grog, the capacity of heat transmission of different cylinder 14 heat exchanger tube 15 porous materials 17 strengthens gradually, is further used as preferably, and the amplitude that the capacity of heat transmission strengthens is gradually increased.It is found through experiments, by such setting, it is provided that exhaust-heat absorption ability provides about 16%.Before main cause is similar.
As preferably, as preferably, along the transporting direction of grog, the heat storage capacity of different cylinder 14 heat exchanger tube 15 porous materials 17 strengthens gradually, is further used as preferably, and the amplitude that heat storage capacity strengthens is gradually increased.Before main cause is similar.
In this programme, it is possible to by arranging identical material, the porous material layer 17 of different heat conductivitys at different parts, it is possible to achieve the different enhancings of the heat energy power that absorbs of different parts heat exchanger tube 15.The porous material layer 17 of unlike material can also be directly selected, obtain different heat absorption capacities.
As preferably, the outer surface of cylinder 14 arranges heat-absorbing material.The heat exchange that main cause is because between insulation material and cylinder 14 there is also a part of radiation heat transfer, it is therefore desirable to arranges heat-storing material to increase caloric receptivity.
As preferably, along the transporting direction of grog, the heat absorption capacity of different cylinder 14 surfaces heat-absorbing material strengthens gradually, is further used as preferably, and the amplitude that heat absorption capacity strengthens is gradually increased.Before main cause is similar.
As preferably, cylinder 14 is outside arranges projection.The height difference that different drum surfaces are protruding, along the transporting direction of grog, the height of different drum surfaces projections is gradually increased, and is further used as preferably, and the amplitude of increase is gradually increased.Before main cause is similar.
As preferably, cylinder 14 is outside arranges projection.The density difference that different drum surfaces are protruding, along the transporting direction of grog, the density of different drum surfaces projections is gradually increased, and is further used as preferably, and the amplitude of increase is gradually increased.Before main cause is similar.
As preferably, described grate-cooler also includes grog outlet temperature detecting device, for detecting the clinker temperature of grog outlet.Described temperature-detecting device is connected with controlling system data.The described control system aperture according to the clinker temperature autocontrol valve of detection, thus controlling to enter the flow of the fluid of heat exchanger tube.
When the temperature of the grog outlet of detection is too high, then the aperture of automatic intensifying valve, increases the flow of the fluid entering heat exchanger tube, if the temperature of detection is too low, then automatically turns valve opening down, reduces the flow of entrance heat exchanger tube fluid.By being automatically adjusted fluid flow, thus being automatically adjusted the quantity of the fluid participating in heat exchange, thus realizing grog is exported the adjustment of clinker temperature, meet the needs on producing, it is ensured that cement quality.
Described control system is capable of adjusting automatically flow according to outlet temperature.Control mode is as follows: during outlet temperature T, flow V, represents the clinker temperature condition meeting manufacture of cement.Above-mentioned outlet temperature T, flow V are normal data.Described normal data stores in the controls.
When outlet temperature becomes t time, 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, and flow V, v unit is m/s, for entering the total flow of waste heat recovery apparatus.
As preferably, when the heat exchanger tube 15 of multiple cylinders 14 is parallel-connection structure time, time flow is adjusted, the ratio increasing or reducing of the heat exchanger tube flow of each cylinder is identical.
As preferably, the ratio that heat exchanger tube 15 flow of each cylinder 14 increases or reduces is different, and along the transporting direction of grog, the ratio increasing or reducing is more and more less.It is preferred that, the amplitude increasing or reducing ratio is more and more less.It is found through experiments, by the setting that flowrate amplitude changes, it is possible to making the data controlled more accurate, error is less, it is possible to reduce by the error of about 30%.
By above-mentioned formula, it is possible to achieve adjust the intellectuality of flow automatically according to outlet temperature, save and can transport, improve production efficiency.
As preferably, it is possible to normal data is organized in input more in the controls.When occurring under two groups or many group benchmark data situations, it is provided that the interface of the benchmark data that user selects, it is preferred that control system can automatically select (1-t/T)2Minimum one of value.
As preferably, described control system includes blower fan frequency regulation arrangement, it is possible to control blower fan frequency according to the clinker temperature of grog outlet, enters the flow of the wind of cooling grog in grate-cooler thus regulating.When temperature is too high, then automatically tune up the frequency of blower fan, increase air output, if the temperature of detection is too low, then automatically reduces blower fan frequency, reduce air output.
It is of course possible to control to combine with fluid flow by blower fan FREQUENCY CONTROL, control grog outlet temperature together.
As preferably, in heat exchanger tube 15, the fluid of heating uses for Waste Heat Generation.
As preferably, heat exchanger tube 15 connects convector, thus being used for heating by the water of heating.
As preferably, the water in heat exchanger tube 15 can be delivered directly in convector, it is also possible to by heat exchanger, transfers heat to heating water, and then heating water enters back in convector and heats.Described radiator includes upper header and lower collector pipe and is positioned at the radiating tube of upper header and lower collector pipe.
nullSuch as Fig. 4、Shown in 5，The radiating tube that described radiator uses，Described radiating tube includes base tube 19 and is positioned at the fin 21-23 that base tube is peripheral，Such as Fig. 4、Shown in 5，The cross section of described base tube is isosceles triangle，Described fin includes the first fin 21 and the second fin 22、Second fin 23，Described first fin 21 is outward extending from isosceles triangle drift angle，Described second fin includes multiple second fin 22 facing out extension from the two of isosceles triangle waist places and from the first outward extending multiple second fin 23 of fin，The second fin 22 extended to same direction、Second fin 23 is parallel to each other,Such as，As shown in the figure，From outward extending second fin 22 of isosceles triangle the second waist 25 (waist on the left side)、Second fin 23 is parallel to each other，From isosceles triangle the first waist 24 (i.e. the waist on the right) outward extending second fin 22、Second fin 23 is parallel to each other，Described first fin 21、Second fin 22、The end that second fin 23 extends forms the second isosceles triangle，As shown in Figure 4，The length of the waist of the second isosceles triangle is S；The internal first fluid passage 20 that arranges of described base tube 19, described first fin 21 is internal arranges second fluid passage 26, and described first fluid passage 21 connects with second fluid passage 26.Such as, as described in Figure 4, connect at isosceles triangle corner position.
Arranged by structure so, can so that base tube 19 be outside arranges multiple fin, increase heat radiation, fluid passage is set inside the first fin 21 simultaneously, fluid is made to enter in the first fin 21, the second fin 22 being directly connected with the first fin 21 carries out heat exchange, adds heat-sinking capability.
General radiating tube is all surrounding or both sides arrange fin, but find in engineering, generally heat convection effect is bad for the fin of the side contacted with wall, because air wall side flow relatively poor, therefore isosceles triangle base 27 is set to plane by the present invention, when therefore fin being installed, can directly by plane and wall close contact, compared with other radiator, can greatly save installing space, avoid the waste in space, take special fin form simultaneously, it is ensured that meet best radiating effect.
As preferably, described second fin the 22, second fin 23 is relative to the face specular at the first fin 21 center line place, namely relative to the face specular at the line place at the summit of isosceles triangle and the midpoint at place, base.
As preferably, second fin the 22, second fin 23 is perpendicular to two waists of the second isosceles triangle and extends.
nullWhen the length on the limit of isosceles triangle is certain，First fin 21 and the second fin 22、Second fin 23 is more long，Then heat transfer effect is more good in theory，Process of the test finds，When the first fin 21 and the second fin 22、Time second fin 23 reaches certain length，Then heat transfer effect just increases very inconspicuous，It is primarily due to along with the first fin 21 and the second fin 22、Second fin 23 length increases，Also more and more lower in the temperature of fin end，Along with temperature is reduced to a certain degree，Then can cause that heat transfer effect is inconspicuous，Also add the cost of material on the contrary and considerably increase the space occupied of radiator，Simultaneously，In heat transfer process，If the spacing between the second fin is too little，Also the deterioration of heat transfer effect is easily caused，Because the increase along with radiating tube length，In air uphill process, boundary region is thickening，Boundary region between abutting fins is caused to overlap mutually，Worsen heat transfer，Radiating tube length is too low or spacing between the second fin causes heat exchange area to reduce too greatly，Have impact on the transmission of heat，Therefore in the distance of the second adjacent fin、The length of side of isosceles triangle、An optimized size relationship is met between length and the heat sink length of the first fin and the second fin.
Therefore, the present invention is the dimensionally-optimised relation of the best radiator summed up by thousands of test datas of multiple various sizes of radiators.
The distance of described the second adjacent fin is L1, and the base length of described isosceles triangle is W, and the length of the waist of described second 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 is logarithmic function, 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 °.
As preferably, base tube 19 length is L, 0.02 < W/L < 0.08,800mm < L < 2500mm.
As preferably, A=0.69, B=24.6, C=8.3.
It should be noted that the distance L1 of adjacent second fin is the distance that the center from the second fin starts to count, as shown in Figure 1.
By testing after result of calculation, by the numerical value of computation bound and intermediate value, the result of gained substantially matches with formula again, and error is substantially within 3.54%, and maximum relative error is less than 3.97%, and mean error is 2.55%.
Preferably, the distance of described the second adjacent fin is identical.
As preferably, the width of the first fin 21 is greater than the width of second fin the 22, second fin 23.
Preferably, the width of the first fin 21 is b1, and the width of second fin the 22, second fin 23 is b2, wherein 2.2*b2 <b1 < 3.1*b2；
As preferably, 0.9mm <b2 < 1mm, 2.0mm <b1 < 3.2mm.
As preferably, the width of second fluid passage 26 is 0.85-0.95 times of the width of the second fin 22, it is preferred to 0.90-0.92 times.
Width b1, b2 herein refers to the mean breadth of fin.
Although the present invention discloses as above with preferred embodiment, but the present invention is not limited to this.Any those skilled in the art, 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 be as the criterion with claim limited range.
Claims (4)
1. the waste heat recovery system of grate cooler of an automatic detection booster, described grate-cooler includes shell, grog passage, it is characterized in that, between described shell and grog passage, insulation material is set, waste heat recovery apparatus is set in insulation material, described waste heat recovery apparatus includes at least one cylinder, arranges heat exchanger tube in described cylinder, and the pressure gauge measuring barrel pressure is connected with cylinder；Described system also includes control system and valve, and described valve is located on heat exchanger tube, and described control system and valve carry out data cube computation, for controlling the opening and closing degree of valve；Described control system and pressure gauge carry out data cube computation, for detecting the pressure of pressure gauge, once the pressure that the pressure gauge of control system detection is measured exceedes predetermined value, now control system control valve door and be automatically switched off, it is to avoid fluid enters heat exchanger tube.
2. residual neat recovering system as claimed in claim 1, it is characterised in that described waste heat recovery apparatus includes multiple cylinder, is connected by connectivity structure between the plurality of cylinder, and described pressure gauge is attached with any one of multiple cylinders.
3. residual neat recovering system as claimed in claim 1, it is characterized in that, grate-cooler also has grog outlet temperature detecting device, for detecting the clinker temperature of grog outlet, described temperature-detecting device is connected with controlling system data, the aperture of the clinker temperature autocontrol valve that described control system detects according to outlet temperature detecting device, thus controlling to enter the flow of the fluid of heat exchanger tube；When the temperature of the grog outlet of detection is too high, then control the aperture of the automatic intensifying valve of system, increase the flow of the fluid entering heat exchanger tube, if the temperature of the grog outlet of detection is too low, then control system and automatically turn valve opening down, reduce the flow entering heat exchanger tube fluid.
4. residual neat recovering system as claimed in claim 3, it is characterized in that, described control system control mode is as follows: outlet temperature T represents the clinker temperature condition meeting manufacture of cement, the fluid flow V of waste heat recovery apparatus is entered during temperature T, above-mentioned outlet temperature T, flow V are normal data, and described normal data stores in the controls；
When outlet temperature becomes t time, flow v change is as follows:
V=b*V* (t/T)a, wherein a is constant, 1.06 < a < 1.10；
B is regulation coefficient, (t/T)>1,0.97<b<1.00；
(t/T)<1,1.00<b<1.04；
(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, and flow V, v unit is m/s, for entering the total flow of waste heat recovery apparatus.
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| CN201510617636.5A CN105115310B (en) | 2015-09-24 | 2015-09-24 | A kind of waste heat recovery system of grate cooler of automatic detection booster |
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| CN201510617636.5A CN105115310B (en) | 2015-09-24 | 2015-09-24 | A kind of waste heat recovery system of grate cooler of automatic detection booster |
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| CN105115310B true CN105115310B (en) | 2016-07-27 |
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Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| GB2170584B (en) * | 1985-02-04 | 1988-02-17 | British Gas Plc | Regenerative heating systems |
| ITUD20050023A1 (en) * | 2005-02-22 | 2006-08-23 | Danieli Off Mecc | CONNECTION CONVEYOR FOR LOADING A METAL CHARGE IN A MERGER PLANT |
| CN101275812A (en) * | 2007-03-27 | 2008-10-01 | 中信重工机械股份有限公司 | Connecting method with powder dust separating device, vertical type invert exhaust-heating boiler and exhaust pipeline |
| CN101963460A (en) * | 2010-10-19 | 2011-02-02 | 张家港市江南锅炉压力容器有限公司 | Waste heat recovery device |
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