CN104596313B - The kiln waste heat utilization system of frequency conversion fan frequency Based Intelligent Control - Google Patents
The kiln waste heat utilization system of frequency conversion fan frequency Based Intelligent Control Download PDFInfo
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- CN104596313B CN104596313B CN201510091965.0A CN201510091965A CN104596313B CN 104596313 B CN104596313 B CN 104596313B CN 201510091965 A CN201510091965 A CN 201510091965A CN 104596313 B CN104596313 B CN 104596313B
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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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The invention provides a kind of kiln waste heat utilization system, described system comprises flue temperature sensor further, described flue temperature sensor setting in the downstream of the outlet of the bypass flue of flue collector, for measure discharge flue gas temperature; Bypass flue is arranged the frequency converting induced draft fan with Programmable Logic Controller data cube computation, the exhaust gas volumn entering bypass flue is regulated by the frequency changing frequency converting induced draft fan, if the temperature measured is too low, then Programmable Logic Controller reduces by the frequency turning frequency converting induced draft fan down the flue gas flow entering by-pass flue.The present invention, by the aperture by regulating blower fan frequency, avoiding producing cold end corrosion, reaching the optimization of UTILIZATION OF VESIDUAL HEAT IN simultaneously, with economize energy, reach the object of environmental protection and energy saving.
Description
Technical field
The invention belongs to field of waste heat utilization, belong to F27 kiln field.
Background technology
Along with China's rapid economic development, energy resource consumption increases day by day, and the problem that urban air quality goes from bad to worse is also outstanding all the more, and the problem of economize energy and the discharge of minimizing environment harmful is extremely urgent.In common field of heat energy power, high, the with serious pollution one of the main reasons of energy consumption is that the exhaust gas temperature of flue gas is too high, namely wastes mass energy, causes environmental pollution again.Cement industry is a highly energy-consuming, the industry of high pollution.In the tail gas that cement rotary kiln produces, dust content is high, poor quality.Cement rotary kiln bootstrap system can carry out recycling to using waste heat from tail gas, realizes the object of energy-saving and emission-reduction.But in relevant bootstrap system, how utility maximizes is avoided cold end corrosion simultaneously, these problems demand solve.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of new kiln waste heat utilization system.
To achieve these goals, technical scheme of the present invention is as follows: a kind of kiln waste heat utilization system, described system comprises stove, flue collector, bypass flue and air-water heat exchanger, the flue gas that described kiln produces enters air-water heat exchanger by bypass flue entrance, and the flue gas after heat exchange discharges after becoming owner of flue by the outlet of bypass flue;
Flue collector control valve is set between the bypass flue entrance and bypass flue outlet of flue collector, for regulating the exhaust gas volumn of flue collector, bypass flue control valve is set on bypass flue simultaneously, regulates the exhaust gas volumn of bypass flue;
Described system comprises flue temperature sensor further, described flue temperature sensor setting in the downstream of the outlet of the bypass flue of flue collector, for measure discharge flue gas temperature; Described system comprises Programmable Logic Controller, Programmable Logic Controller and temperature sensor, flue collector control valve and bypass flue control valve carry out data cube computation, and Programmable Logic Controller adjusts the aperture of flue collector control valve and bypass flue control valve automatically according to the exhaust gas temperature of temperature sensor measurement.
A kind of kiln waste heat utilization system, described system comprises stove, flue collector, bypass flue and air-water heat exchanger, the flue gas that described kiln produces enters air-water heat exchanger by bypass flue entrance, and the flue gas after heat exchange discharges after becoming owner of flue by the outlet of bypass flue;
Described system comprises hot water feeding pipe, cold-water return pipe, control valve, inflow temperature sensor, heat exchanger, Programmable Logic Controller further, described air-water heat exchanger connects hot water feeding pipe and cold-water return pipe, hot water feeding pipe is connected with heat exchanger, hot water feeding pipe arranges control valve, for regulating the hot water amount entering heat exchanger, pipeline between control valve and heat exchanger is arranged inflow temperature sensor, for measuring the inflow temperature of heat exchanger;
Heat exchanger is connected with heat user feed pipe and heat user return pipe, heat user radiator is connected between heat user feed pipe and heat user return pipe, the water of heat user return pipe by carrying out indirect heat exchange with the hot water in heat exchanger, and then is arrived in user radiator by heat user feed pipe and heats; Described circulating pump be arranged on user's radiator and and heat exchanger between heat user return pipe on;
Bypass flue arranges bypass flue control valve, regulate the exhaust gas volumn of bypass flue, bypass flue control valve and Programmable Logic Controller data cube computation, Programmable Logic Controller regulates the aperture of control valve according to the inflow temperature of the heat exchanger of temperature sensor measurement, if inflow temperature is too high, then reduce the aperture of control valve accordingly, if inflow temperature is too low, then increase the aperture of control valve accordingly.
A kind of kiln waste heat utilization system, described system comprises stove, flue collector, bypass flue and air-water heat exchanger, the flue gas that described kiln produces enters air-water heat exchanger by bypass flue entrance, and the flue gas after heat exchange discharges after becoming owner of flue by the outlet of bypass flue;
Described system comprises hot water feeding pipe further, cold-water return pipe, control valve, inflow temperature sensor, leaving water temperature sensors, heat exchanger, heat user flow pipe, heat user return pipe, user's radiator, circulating pump, flowmeter, calorimeter, Programmable Logic Controller, described air-water heat exchanger connects hot water feeding pipe and cold-water return pipe, hot water feeding pipe is connected with heat exchanger, hot water feeding pipe arranges control valve, for regulating the hot water amount entering heat exchanger, pipeline between control valve and heat exchanger is arranged inflow temperature sensor, for measuring the inflow temperature of heat exchanger,
Heat exchanger is connected with heat user feed pipe and heat user return pipe, heat user radiator is connected between heat user feed pipe and heat user return pipe, the water of heat user return pipe carries out indirect heat exchange by the hot water provided with the heating plant in heat exchanger, and then is arrived in user's radiator by heat user feed pipe and heat; Described circulating pump be arranged on user's radiator and and heat exchanger between heat user return pipe on;
Heat exchanger is connected with cold-water return pipe, and cold-water return pipe arranges flowmeter, for detecting the flow of the water in cold-water return pipe; Cold-water return pipe between flowmeter and heat exchanger sets out water temperature sensor, for measuring the leaving water temperature of heat exchanger;
Described calorimeter and inflow temperature sensor, leaving water temperature sensors and flowmeter carry out data cube computation, and calculate the heat expended of heat user according to the flow of the inflow temperature measured, leaving water temperature and water;
Described Programmable Logic Controller and circulating pump, calorimeter and control valve carry out data cube computation, for automatically controlling the pre-heat utilization system of kiln; The data that the heat of user uses are passed to Programmable Logic Controller by calorimeter, and the heat that Programmable Logic Controller is bought according to user contrasts with the heat used at present, if heat is finished, Controlled by Programmable Controller control valve cuts out completely;
Heat user feed pipe is arranged heat user feed temperature sensor, for detecting heat user feed temperature, feed temperature sensor and Programmable Logic Controller carry out data cube computation; When Controlled by Programmable Controller control valve cuts out, water circulating pump continues to run, when the feed temperature that feed temperature sensor detects reaches certain limit and cannot use, Programmable Logic Controller progressively slows down the defeated pump of circulation and the final operation stopping water circulating pump.
Programmable Logic Controller calculates the remaining heat of user automatically, and when user's heat surplus reaches the first data, Programmable Logic Controller adjustment control valve is to the first aperture lower than normal aperture; When user's heat surplus reaches lower than the first data second data, Programmable Logic Controller adjustment control valve is to the second aperture lower than the first aperture; When user's heat surplus reaches lower than the second data the 3rd data, Programmable Logic Controller adjustment control valve is to the 3rd aperture lower than the second aperture; When user's heat surplus reaches lower than the 3rd data the 4th data, Programmable Logic Controller adjustment control valve is to the 4th aperture lower than the 3rd aperture; When user's heat surplus reaches lower than the 4th data the 5th data, Programmable Logic Controller adjustment control valve is to the 5th aperture lower than the 4th aperture; When user's heat surplus reaches lower than the 5th data the 6th data, Programmable Logic Controller adjustment control valve is to the 6th aperture lower than the 5th aperture; Last when user's heat surplus reaches close to zero, Programmable Logic Controller adjustment control valve cuts out completely.
A kind of kiln waste heat utilization system, described system comprises stove, flue collector, bypass flue and air-water heat exchanger, the flue gas that described kiln produces enters air-water heat exchanger by bypass flue entrance, and the flue gas after heat exchange discharges after becoming owner of flue by the outlet of bypass flue; Water enters hot water feeding pipe after heating in air-water heat exchanger, and hot water feeding pipe is connected with heat exchanger, and the water in radiator return pipe enters in heat exchanger and heats;
Hot water feeding pipe arranges control valve, to regulate the hot water entered in heat exchanger;
The water return pipeline of radiator arranges circulating pump, and Programmable Logic Controller and control valve and circulating pump carry out data cube computation, and when the change of frequency of circulating pump, the aperture of control valve changes accordingly, thus the hot water of input heat exchanger is changed accordingly.
A kind of kiln waste heat utilization system, described system comprises stove, flue collector, bypass flue and air-water heat exchanger, the flue gas that described kiln produces enters air-water heat exchanger by bypass flue entrance, and the flue gas after heat exchange discharges after becoming owner of flue by the outlet of bypass flue;
Described system comprises flue temperature sensor further, described flue temperature sensor setting in the downstream of the outlet of the bypass flue of flue collector, for measure discharge flue gas temperature; Bypass flue is arranged the frequency converting induced draft fan with Programmable Logic Controller data cube computation, the exhaust gas volumn entering bypass flue is regulated by the frequency changing frequency converting induced draft fan, if the temperature measured is too low, then Programmable Logic Controller reduces by the frequency turning frequency converting induced draft fan down the flue gas flow entering by-pass flue.
Compared with prior art, the present invention has following advantage:
1) flue gas required for the temperature heat exchanging of heating controls automatically;
2) temperature of aperture to tail gas by controlling to adjust valve controls automatically, avoids cold end corrosion.
3) the invention provides a kind of heating system that can carry out heat control newly, buy heat by user oneself, once heat is finished, then automatically stop heating.
4) after stopping heating; water pump; maintain original state to continue to run; the feed temperature of heat user is detected by Programmable Logic Controller; when feed temperature is reduced to certain limit and cannot uses; Programmable Logic Controller triggers halt command, slows down circulating pump and final shutdown by subtracting. and this operation mainly when heat user network is larger, makes full use of the waste heat in system pipeline.
5) buy in heat is about to be finished user, system carrys out reminding user by progressively reducing heating amount, and user is bought in time.
6) have developed new radiator base tube and the material of fin, strengthen heat transfer.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of kiln waste heat utilization system of the present invention;
Fig. 2 is another schematic diagram of kiln waste heat utilization system of the present invention;
Fig. 3 is the schematic diagram of user's radiator of the present invention;
Fig. 4 is the cross sectional representation of finned tube;
Fig. 5 is the schematic diagram of Fig. 4 from the embodiment of viewed from left side;
Fig. 6 is that Fig. 4 is from the embodiment schematic diagram optimized of viewed from left side.Reference numeral is as follows:
1 kiln, 2 flue collector control valves, 3 bypass flue control valves, 4 air exhausters, 5 flue temperature sensors, 6 air-water heat exchangers, 7 hot water feeding pipes, 8 cold-water return pipes, 9 control valves, 10 flowmeters, 11 inflow temperature sensors, 12 leaving water temperature sensors, 13 heat exchangers, 14 heat user feed pipes, 15 heat user return pipes, 16 circulating pumps, 17 calorimeters, 18 Programmable Logic Controllers, 19 real operation interfaces, 20 upper headers, the part of fin is not had in 21 base tubes, 22 finned tubes, 23 lower collector pipe, 24 base tubes, 25 first fins, 26 gaps, 27 first braces, 28 second fins, 29 the 4th fins, 30 the 3rd fins, 31 second braces, 32 ancillary heating equipment, 33 flue collectors, 34 bypass flues, 35 bypass flue entrances, 36 bypass flue outlets, 37 frequency converting induced draft fans.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.
As shown in Figure 1-2, a kind of co-generation unit comprises residual heat system, heat-exchange system and cooling system, wherein carry out heat exchange by air-water heat exchanger 6 between residual heat system with heat-exchange system to associate, between heat-exchange system and cooling system, carry out heat exchange connection by heat exchanger 13.Fig. 1 illustrates a kind of kiln waste heat utilization system, described system comprises stove 1, flue collector 33, bypass flue 34 and air-water heat exchanger 6, the flue gas that described kiln produces enters air-water heat exchanger 6 by bypass flue entrance 35, and the flue gas after heat exchange discharges after flowing into flue collector 33 by the outlet 36 of bypass flue.
Flue collector control valve 2 is set between the bypass flue entrance 35 and bypass flue outlet 36 of flue collector 33, for regulating the exhaust gas volumn of flue collector, bypass flue control valve 3 is set on bypass flue 34 simultaneously, regulates the exhaust gas volumn of bypass flue.
Said system comprises flue temperature sensor 5 further, and described flue temperature sensor 5 is arranged on the downstream of the outlet 36 of the bypass flue of flue collector 33, for measuring the temperature of discharge flue gas.Described system comprises Programmable Logic Controller 18, Programmable Logic Controller 18 and temperature sensor 5, flue collector control valve 2 and bypass flue control valve 3 carry out data cube computation, Programmable Logic Controller 18 adjusts the aperture of flue collector control valve and bypass flue control valve automatically according to the exhaust gas temperature of temperature sensor measurement, to avoid cold end corrosion.
If the temperature measured is too low, then Programmable Logic Controller 18 is by tuning up the aperture of flue collector control valve 2, reduces the aperture of bypass flue control valve 4 simultaneously.By reducing the flue gas flow entering by-pass flue like this, avoid because too much flue gas carries out heat exchange and causes exhaust gas temperature too low.
Certainly, as a preferred embodiment, flue collector control valve and bypass flue control valve can not be set, as shown in Figure 2, the frequency converting induced draft fan 37 be connected with Programmable Logic Controller eighteen data is only set on bypass flue, regulates by the frequency changing frequency converting induced draft fan 37 exhaust gas volumn entering bypass flue 34.If the temperature measured is too low, then Programmable Logic Controller 18 reduces by the frequency turning frequency converting induced draft fan 37 down the flue gas flow entering by-pass flue, avoids because too much flue gas carries out heat exchange and causes exhaust gas temperature too low, thus avoids cold end corrosion.
Preferably, air-water heat exchanger 6 is shell-and-tube heat exchanger.
As shown in Figure 1, described system comprises hot water feeding pipe 7 further, cold-water return pipe 8, control valve 9, inflow temperature sensor 11, leaving water temperature sensors 12, heat exchanger 13, heat user flow pipe 14, heat user return pipe 15, user's radiator, circulating pump 16, flowmeter 10, calorimeter 17, Programmable Logic Controller 18, described hot water feeding pipe 7 is connected with heat exchanger 13, hot water feeding pipe 7 arranges control valve 9, for regulating the flow of the hot water entering heat exchanger 13, pipeline between control valve 9 and heat exchanger 13 is arranged inflow temperature sensor 11, for measuring the inflow temperature of heat exchanger 13,
Heat exchanger 13 is connected with heat user feed pipe 14 and heat user return pipe 15, heat user radiator (see Fig. 2) is connected between heat user feed pipe 14 and heat user return pipe 15, the water of heat user return pipe 15 carries out heat exchange by the hot water provided with the steam-water heat exchanger in heat exchanger 13, and then is arrived in user's radiator by heat user feed pipe 14 and heat; Described circulating pump 16 is arranged on heat user return pipe 15;
Heat exchanger 13 is connected with cold-water return pipe 8, and cold-water return pipe 8 arranges flowmeter 10, for detecting the flow of the water in cold-water return pipe 8; Cold-water return pipe 8 between flowmeter 10 and heat exchanger 13 sets out water temperature sensor, for measuring the leaving water temperature of heat exchanger 13;
As one preferably, only bypass flue control valve can be set on bypass flue, do not need to arrange flue collector control valve, regulate the exhaust gas volumn of bypass flue, bypass flue control valve and Programmable Logic Controller data cube computation, Programmable Logic Controller regulates the aperture of control valve according to the inflow temperature of the heat exchanger 13 of temperature sensor measurement, if inflow temperature is too high, then reduce the aperture of control valve accordingly, if inflow temperature is too low, then increase the aperture of control valve accordingly.Arrange like this and can make full use of heat energy, avoid heat too much and cause waste or very few and cause deficiency.
Described calorimeter 17 carries out data cube computation with inflow temperature sensor 11, leaving water temperature sensors 12 and flowmeter 10, and calculates the heat expended of heat user according to the flow of the inflow temperature measured, leaving water temperature and water;
Described Programmable Logic Controller 18 carries out data cube computation, for automatically controlling the pre-heat utilization system of kiln with circulating pump 16, calorimeter 17 and control valve 10; The data that the heat of user uses are passed to Programmable Logic Controller 18 by calorimeter 17, the heat that Programmable Logic Controller 18 is bought according to user contrasts with the heat used at present, if heat is finished, Programmable Logic Controller 18 controls to adjust valve and closes completely;
Heat user feed pipe is arranged heat user feed temperature sensor (not shown), for detecting heat user feed temperature, feed temperature sensor and Programmable Logic Controller carry out data cube computation; When Controlled by Programmable Controller control valve cuts out, water circulating pump continues to run, when the feed temperature that feed temperature sensor detects reaches certain limit and cannot use, Programmable Logic Controller progressively slows down the defeated pump of circulation and the final operation stopping water circulating pump.
Circulating pump is not shut down, and maintains original state and continues operation, detected the feed temperature of heat user by Programmable Logic Controller, and when feed temperature is reduced to certain limit and cannot uses, Programmable Logic Controller triggers halt command, slows down circulating pump and final shutdown by subtracting.
This operation mainly when heat user network is larger, makes full use of the waste heat in system pipeline as far as possible.
The pre-heat utilization system of above-mentioned kiln can also comprise display operating panel, and real operation panel class can be used for user to carry out inquiring about, paying the fees operations such as buying heat.
Calorimeter can be real-time by user use heat be supplied to Programmable Logic Controller, also can provide according to the regular hour, such as every day carries out lump-sum settlement.
Programmable Logic Controller calculates the remaining heat of user automatically, and when user's heat surplus reaches the first data, Programmable Logic Controller adjustment control valve is to the first aperture lower than normal aperture; When user's heat surplus reaches lower than the first data second data, Programmable Logic Controller adjustment control valve is to the second aperture lower than the first aperture; When user's heat surplus reaches lower than the second data the 3rd data, Programmable Logic Controller adjustment control valve is to the 3rd aperture lower than the second aperture; When user's heat surplus reaches lower than the 3rd data the 4th data, Programmable Logic Controller adjustment control valve is to the 4th aperture lower than the 3rd aperture; When user's heat surplus reaches lower than the 4th data the 5th data, Programmable Logic Controller adjustment control valve is to the 5th aperture lower than the 4th aperture; When user's heat surplus reaches lower than the 5th data the 6th data, Programmable Logic Controller adjustment control valve is to the 6th aperture lower than the 5th aperture; Last when user's heat surplus reaches close to zero, Programmable Logic Controller adjustment control valve cuts out completely.
Programmable Logic Controller is by the above-mentioned operation of progressively closing the operate power of control valve and reduction pump, it can be the stopping heated progressively, such user just can feel that heating amount is in decline gradually, thus its heat knowing that you buy has been closed on be finished, need to buy as early as possible.
Above-mentioned operation can complete in regular hour section, has completed such as, in several days or in the week, and such user could feel the minimizing of heating amount gradually, thus reminds him initiatively to buy heat.
Above-mentioned user operation can pass through real-time performance, thus realize without cassette heat charging administration system, achieve charge and heat supply network supplement with money without card transmission, heat user obtains the payment password obtained according to payment number after Online Payment, and supplement with money in unit operation hypervisor within a certain period of time, supplement the rear amount of money with money and password all lost efficacy, thus greatly reduce the financial risks in heat supply network charge.
Certainly, user also directly can use Web bank to carry out purchase operation by real operation panel.
As one preferably, described Programmable Logic Controller 18 carries out data cube computation with control valve 9, when radiator circulating pump 16 because the heat consumption of user is complete or be about to consumption complete and cause aperture to change time, now, Programmable Logic Controller 18 regulates the aperture of control valve 9 automatically according to the frequency of circulating pump 16, thus the hot water of input heat exchanger 13 is changed accordingly, such as, corresponding minimizing, with economize energy.
As one preferably, hot water feeding pipe arranges ancillary heating equipment 32, described ancillary heating equipment 32 is connected with Programmable Logic Controller eighteen data, and PLC technology starts ancillary heating equipment automatically according to the inflow temperature of the heat exchanger 13 that inflow temperature sensor 11 is measured.If the inlet temperature calculated is less than predetermined value, then Programmable Logic Controller 20 starts ancillary heating equipment 7, with the water on heat hot water feed pipe.Adopt the main purpose of ancillary heating equipment be avoid because flue gas waste heat quantity not sufficient and the problem of heat exchange quantity not sufficient that causes.The main cause of heat exchange quantity not sufficient is because the heat exchange quantity not sufficient entering bypass flue gas causes, such as, in order to avoid cold end corrosion.
As the technical scheme that can be replaced, Programmable Logic Controller can start ancillary heating equipment automatically by the heat exchange amount measuring heat exchanger 13.If the heat exchange amount of heat exchanger 13 is lower than certain numerical value, then automatically start.The heat exchange amount of heat exchanger can be obtained by calorimeter 17.
As one preferably, ancillary heating equipment is electric heating equipment.
Have choosing as another, ancillary heating equipment is boiler.Certainly, present invention also offers a kind of radiator, this kind of radiator can be protected as independent radiator product.
Described heat user radiator is finned tubular radiator, comprise upper header 20, lower collector pipe 23 and be connected the finned tube 22 of upper header 20 and lower collector pipe 23, described finned tube 22 comprises circular base tube 24 and the first fin 25, second fin 28, first fin 25 and the second fin 28 are arranged on the outside of base tube 24 and the extended line of the first fin 25 and the second fin 28 intersects at the central axis of the base tube at the place, the center of circle of base tube 26, and the first fin 25 and the second fin 28 are along the first plane B specular by base tube central axis; Described finned tube comprises the 3rd fin 30 and the 4th fin 29, described 3rd fin 30, the 4th fin 29 along the second plane C respectively with the first fin 25 and the second fin 28 specular, described second plane C is vertical with the first plane B and through the central axis of base tube 24; Between described first fin 25 and the second fin 28, first brace 27 is set, the second brace 31, first brace 27 is set between described 3rd fin 30 and the 4th fin 33 and the second brace 31 is circular arc type metallic plate; The central axis of described circular arc-shaped metal plate and the central axes of base tube 24; Described base tube is straight tube, and the central axis of described adjacent base tube is parallel to each other.
As one preferably, described heat exchanger 13 is heat-exchangers of the plate type.
As one preferably, as shown in Figure 5,6, the first fin of described radiator and the fin height of the second fin diminish from the bottom of user's radiator gradually to top.By such setting, can make in the flow process of air in the space of fin, gap 26 area is more and more less, thus makes its flow velocity more and more faster, and chimney effect is more and more obvious, thus strengthens heat exchange.
As one preferably, the amplitude that the first fin of described radiator and the fin height of the second fin diminish from the bottom of user's radiator gradually to top is more and more lower.Experiment proves, in radiator, by such setting, the amplitude that heat transfer effect will obviously be better than changing is constant or become large situation gradually.
As one preferably, the first fin of described radiator and the fin height of the second fin are parabolic structure from the bottom of user's radiator to top.This set is that the change of fin serves fairshaped effect, reaches best heat transfer effect, simultaneously because extend a part outside bottom, makes more air enter gap.
For two kinds of situations of Fig. 5 and Fig. 6, the fin of radiator still can adopt the angle between described first fin and the second fin to be A, the length of the first fin and the second fin is L, the outer radius of base tube is R, along the formula that base tube fin height H axially meets, but consideration ease of processing, in the height direction finned tube can be divided into a few part, every part takes average fin height H, but length L remains unchanged, adopt the mode of total length, determine included angle A by average fin height.
Directly can certainly will adopt average fin height, calculate an angle, the height angle along fin remains unchanged.
Certainly, in particular cases, because the difficulty manufactured, fin also not necessarily have to meet the optimization formula of above-mentioned several parameters, also can be set to the mode being convenient to manufacture, such as shown in Figure 6, fin is the mode of straight line, remain unchanged highly always, but the distance in the center of circle of circular arc closure plate distance finned tube base tube, and the height along base tube constantly reduces.
As preferably, the distance in the center of circle of circular arc closure plate distance finned tube base tube, in short transverse, the streamlined change of parabolically formula, simultaneously because extend a part outside bottom, makes more air enter gap.
Certainly, the embodiment of Fig. 6, also can meet the formula of above-mentioned optimization, but manufactures cumbersome.
The material preferably aluminium alloy of base tube and fin, the mass percent of the component of described aluminium alloy is as follows: 1.4%Cu, 2.8%Mg, 3.2%Ag, 1.2%Mn, 0.42%Zr, 0.15%Fe, 1.18%Ti, 18.38%Si, 0.4%Cr, 1.1%Ni, and all the other are Al.
The manufacture method of aluminium alloy is: adopt vacuum metallurgy melting, and argon for protecting pouring becomes circle base, through 600 DEG C of Homogenization Treatments, at 400 DEG C, adopts and is hot extruded into bar, and then after 580 DEG C of solution hardening, carry out artificial aging process at 200 DEG C.Thermal conductivity factor for be greater than 250W/ (m*k) under 50-70 degree celsius temperature.
Although the present invention discloses as above with preferred embodiment, the present invention is not defined in 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 (1)
1. a kiln waste heat utilization system, described system comprises stove, flue collector, bypass flue and air-water heat exchanger, described system comprises hot water feeding pipe, cold-water return pipe, control valve, inflow temperature sensor, leaving water temperature sensors, heat exchanger, heat user feed pipe, heat user return pipe, user's radiator, water circulating pump, flowmeter, calorimeter, Programmable Logic Controller further, the flue gas that described kiln produces enters air-water heat exchanger by bypass flue entrance, and the flue gas after heat exchange enters the laggard row discharge of flue collector by the outlet flow of bypass flue;
Described system comprises flue temperature sensor further, described flue temperature sensor setting in the downstream of the outlet of the bypass flue of flue collector, for measure discharge flue gas temperature; Bypass flue is arranged the frequency converting induced draft fan with Programmable Logic Controller data cube computation, the exhaust gas volumn entering bypass flue is regulated by the frequency changing frequency converting induced draft fan, if the temperature measured is too low, then Programmable Logic Controller reduces by the frequency turning frequency converting induced draft fan down the flue gas flow entering by-pass flue;
Described air-water heat exchanger connects hot water feeding pipe and cold-water return pipe, hot water feeding pipe is connected with heat exchanger, hot water feeding pipe arranges control valve, for regulating the hot water amount entering heat exchanger, pipeline between control valve and heat exchanger is arranged inflow temperature sensor, for measuring the inflow temperature of heat exchanger;
Heat exchanger is connected with heat user feed pipe and heat user return pipe, heat user radiator is connected between heat user feed pipe and heat user return pipe, the water of heat user return pipe carries out indirect heat exchange by the hot water provided with the heating plant in heat exchanger, and then is arrived in user's radiator by heat user feed pipe and heat; Described water circulating pump be arranged on user's radiator and and heat exchanger between heat user return pipe on;
Heat exchanger is connected with cold-water return pipe, and cold-water return pipe arranges flowmeter, for detecting the flow of the water in cold-water return pipe; Cold-water return pipe between flowmeter and heat exchanger sets out water temperature sensor, for measuring the leaving water temperature of heat exchanger;
Described calorimeter and inflow temperature sensor, leaving water temperature sensors and flowmeter carry out data cube computation, and calculate the heat expended of heat user according to the flow of the inflow temperature measured, leaving water temperature and water;
Described Programmable Logic Controller and water circulating pump, calorimeter and control valve carry out data cube computation, for automatically controlling the pre-heat utilization system of kiln; The data that the heat of user uses are passed to Programmable Logic Controller by calorimeter, and the heat that Programmable Logic Controller is bought according to user contrasts with the heat used at present, if heat is finished, Controlled by Programmable Controller control valve cuts out completely;
Heat user feed pipe is arranged heat user feed temperature sensor, for detecting heat user feed temperature, feed temperature sensor and Programmable Logic Controller carry out data cube computation; When Controlled by Programmable Controller control valve cuts out, water circulating pump continues to run, when the feed temperature that feed temperature sensor detects reaches certain limit and cannot use, Programmable Logic Controller progressively slows down water circulating pump and the final operation stopping water circulating pump; Programmable Logic Controller calculates the remaining heat of user automatically, and when user's heat surplus reaches the first data, Programmable Logic Controller adjustment control valve is to the first aperture lower than normal aperture; When the second data that user's heat surplus reaches lower than the first data, Programmable Logic Controller adjustment control valve is to the second aperture lower than the first aperture; When the 3rd data that user's heat surplus reaches lower than the second data, Programmable Logic Controller adjustment control valve is to the 3rd aperture lower than the second aperture; When the 4th data that user's heat surplus reaches lower than the 3rd data, Programmable Logic Controller adjustment control valve is to the 4th aperture lower than the 3rd aperture; When the 5th data that user's heat surplus reaches lower than the 4th data, Programmable Logic Controller adjustment control valve is to the 5th aperture lower than the 4th aperture; When the 6th data that user's heat surplus reaches lower than the 5th data, Programmable Logic Controller adjustment control valve is to the 6th aperture lower than the 5th aperture; Last when user's heat surplus reaches close to zero, Programmable Logic Controller adjustment control valve cuts out completely.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510091965.0A CN104596313B (en) | 2014-04-14 | 2014-04-14 | The kiln waste heat utilization system of frequency conversion fan frequency Based Intelligent Control |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410146557.6A CN103900389B (en) | 2014-04-14 | 2014-04-14 | Intelligent-control efficient kiln waste heat utilization system |
| CN201510091965.0A CN104596313B (en) | 2014-04-14 | 2014-04-14 | The kiln waste heat utilization system of frequency conversion fan frequency Based Intelligent Control |
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| CN201410146557.6A Division CN103900389B (en) | 2014-04-14 | 2014-04-14 | Intelligent-control efficient kiln waste heat utilization system |
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| CN104596313A CN104596313A (en) | 2015-05-06 |
| CN104596313B true CN104596313B (en) | 2016-03-16 |
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| CN201510091664.8A Expired - Fee Related CN104596310B (en) | 2014-04-14 | 2014-04-14 | The kiln waste heat utilization system of ancillary heating equipment automatic shutter |
| CN201410146557.6A Expired - Fee Related CN103900389B (en) | 2014-04-14 | 2014-04-14 | Intelligent-control efficient kiln waste heat utilization system |
| CN201510091826.8A Expired - Fee Related CN104596311B (en) | 2014-04-14 | 2014-04-14 | The kiln waste heat utilization system of exhaust gas volumn Intelligent adjustment |
| CN201510091567.9A Expired - Fee Related CN104596309B (en) | 2014-04-14 | 2014-04-14 | The kiln waste heat utilization system of circulating pump and the intelligent coordinated adjustment of control valve |
| CN201510091965.0A Expired - Fee Related CN104596313B (en) | 2014-04-14 | 2014-04-14 | The kiln waste heat utilization system of frequency conversion fan frequency Based Intelligent Control |
| CN201510091827.2A Expired - Fee Related CN104596312B (en) | 2014-04-14 | 2014-04-14 | To the bootstrap system of user's heat Based Intelligent Control |
Family Applications Before (4)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510091664.8A Expired - Fee Related CN104596310B (en) | 2014-04-14 | 2014-04-14 | The kiln waste heat utilization system of ancillary heating equipment automatic shutter |
| CN201410146557.6A Expired - Fee Related CN103900389B (en) | 2014-04-14 | 2014-04-14 | Intelligent-control efficient kiln waste heat utilization system |
| CN201510091826.8A Expired - Fee Related CN104596311B (en) | 2014-04-14 | 2014-04-14 | The kiln waste heat utilization system of exhaust gas volumn Intelligent adjustment |
| CN201510091567.9A Expired - Fee Related CN104596309B (en) | 2014-04-14 | 2014-04-14 | The kiln waste heat utilization system of circulating pump and the intelligent coordinated adjustment of control valve |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510091827.2A Expired - Fee Related CN104596312B (en) | 2014-04-14 | 2014-04-14 | To the bootstrap system of user's heat Based Intelligent Control |
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| CN (6) | CN104596310B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105202517B (en) * | 2015-10-22 | 2018-04-10 | 中北大学 | A kind of station boiler afterheat utilizing system of blower fan frequency intelligent control |
| CN105202618B (en) * | 2015-10-22 | 2018-04-10 | 中北大学 | A kind of boiler afterheat heating method of anti-low-temperature corrosion |
| CN105202518B (en) * | 2015-10-22 | 2016-11-30 | 中北大学 | A kind of station boiler bootstrap system |
| CN105202617B (en) * | 2015-10-22 | 2017-03-08 | 中北大学 | A kind of station boiler bootstrap system of setting ancillary heating equipment |
| CN105387505B (en) * | 2015-10-22 | 2017-08-22 | 中北大学 | A kind of boiler heating system |
| CN108247017B (en) * | 2017-12-29 | 2019-12-13 | 安徽高德铝业有限公司 | Aluminum profile vacuum processing control system based on waste heat recovery |
| CN108613211A (en) * | 2018-06-08 | 2018-10-02 | 江苏双良新能源装备有限公司 | A kind of bypass type flue gas waste heat recovery system and its take cigarette control method |
| CN112432510B (en) * | 2019-08-26 | 2022-07-19 | 宝山钢铁股份有限公司 | Control method for coexistence of conventional flue and waste heat recovery double flues |
| CN112432536A (en) * | 2020-11-30 | 2021-03-02 | 奇瑞汽车股份有限公司 | Comprehensive utilization system for waste gas and waste heat of drying furnace in automobile coating workshop and working method thereof |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2573978Y (en) * | 2002-10-22 | 2003-09-17 | 刘智泉 | Adjustable air supply device for flue heat exchange of heating furnace |
| CN2745015Y (en) * | 2004-11-09 | 2005-12-07 | 丁永健 | Flue gas residual heat utilization apparatus for industrial furnaces |
| CN102269401A (en) * | 2010-06-07 | 2011-12-07 | 洛阳蓝海实业有限公司 | Low-temperature flue gas waste heat recovery utilization method |
| CN102564146A (en) * | 2012-02-03 | 2012-07-11 | 北京京诚凤凰工业炉工程技术有限公司 | Heating furnace flue gas waste heat recovery and power generation system |
-
2014
- 2014-04-14 CN CN201510091664.8A patent/CN104596310B/en not_active Expired - Fee Related
- 2014-04-14 CN CN201410146557.6A patent/CN103900389B/en not_active Expired - Fee Related
- 2014-04-14 CN CN201510091826.8A patent/CN104596311B/en not_active Expired - Fee Related
- 2014-04-14 CN CN201510091567.9A patent/CN104596309B/en not_active Expired - Fee Related
- 2014-04-14 CN CN201510091965.0A patent/CN104596313B/en not_active Expired - Fee Related
- 2014-04-14 CN CN201510091827.2A patent/CN104596312B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN104596309B (en) | 2016-03-16 |
| CN104596310B (en) | 2016-03-16 |
| CN104596312A (en) | 2015-05-06 |
| CN104596313A (en) | 2015-05-06 |
| CN103900389B (en) | 2015-03-25 |
| CN104596309A (en) | 2015-05-06 |
| CN103900389A (en) | 2014-07-02 |
| CN104596311A (en) | 2015-05-06 |
| CN104596312B (en) | 2016-03-16 |
| CN104596311B (en) | 2016-03-16 |
| CN104596310A (en) | 2015-05-06 |
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