CN104713376A - Kiln waste heat system for automatically controlling amount of hot water input into heat exchanger - Google Patents
Kiln waste heat system for automatically controlling amount of hot water input into heat exchanger Download PDFInfo
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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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Abstract
The invention provides a kiln waste heat utilization system. The kiln waste heat utilization system comprises a kiln, a main flue, a bypass flue and a gas-water heat exchanger, wherein a first adjustment valve is arranged on a hot water supply pipe in order to adjust hot water entering the heat exchanger; a second adjustment valve is arranged on a water inlet pipeline of a heat user radiator, a programmable logic controller is in data connection with the first adjustment valve and the second adjustment valve, when the opening degree of the second adjustment valve changes, the opening degree of the first adjustment valve correspondingly changes, and therefore the hot water input into the heat exchanger correspondingly changes. The kiln waste heat utilization system can automatically control the hot water input into the heat exchanger according to the opening degrees of the adjustment valves of the radiator, and enables the heat exchange efficiency of the heat exchanger to be maximized, thereby achieving the purposes of being environmentally friendly and saving energy.
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; Described system comprises hot water feeding pipe, cold-water return pipe, control valve, heat exchanger, heat user flow pipe, heat user return pipe, user's radiator, circulating pump, flowmeter, calorimeter, 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;
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 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;
Described heat user radiator is the multiple of parallel connection, the outlet pipe of each heat user radiator arranges flowmeter, for detecting the flow of the water in heat user radiator; Water inlet and the delivery port of each heat user radiator arrange inflow temperature sensor and leaving water temperature sensors, for measuring the Inlet and outlet water temperature of heat user radiator; The water inlet pipe of each heat user radiator arranges user's control valve;
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 calorimeter and control valve carry out data cube computation, for automatically controlling kiln waste heat utilization system; 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.
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;
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 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;
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, heat exchange is carried out with the water from cold-water return pipe in air-water heat exchanger, hot water feeding pipe is entered after water heating, 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 is arranged the first control valve, to regulate the hot water entered in heat exchanger;
The inlet pipeline of radiator arranges the second control valve, Programmable Logic Controller and the first control valve and the second control valve carry out data cube computation, during the first control valve opening change, the aperture of the second 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 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 kiln waste heat utilization system; The data that the heat of user uses are passed to Programmable Logic Controller by calorimeter, 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, and water circulating pump is out of service simultaneously.
Programmable Logic Controller calculates the remaining heat of user automatically, when user's heat surplus reaches the first data, circulating pump, to the first aperture lower than normal aperture, is adjusted to the first power lower than normal operate power by Programmable Logic Controller adjustment control valve simultaneously; When user's heat surplus reaches lower than the first data second data, circulating pump, to the second aperture lower than the first aperture, is adjusted to the second power lower than the first power by Programmable Logic Controller adjustment control valve simultaneously; When user's heat surplus reaches lower than the second data the 3rd data, circulating pump, to the 3rd aperture lower than the second aperture, is adjusted to the 3rd power lower than the second power by Programmable Logic Controller adjustment control valve simultaneously; When user's heat surplus reaches lower than the 3rd data the 4th data, circulating pump, to the 4th aperture lower than the 3rd aperture, is adjusted to the 4th power lower than the 3rd power by Programmable Logic Controller adjustment control valve simultaneously; When user's heat surplus reaches lower than the 4th data the 5th data, circulating pump, to the 5th aperture lower than the 4th aperture, is adjusted to the 5th power lower than the 4th power by Programmable Logic Controller adjustment control valve simultaneously; When user's heat surplus reaches lower than the 5th data the 6th data, circulating pump, to the 6th aperture lower than the 5th aperture, is adjusted to the 6th power lower than the 5th power by Programmable Logic Controller adjustment control valve simultaneously; Last when user's heat surplus reaches close to zero, Programmable Logic Controller adjustment control valve cuts out completely, stops the operation of circulating pump simultaneously.
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;
Fig. 7 is the single user schematic diagram of kiln waste heat utilization system of the present invention;
Fig. 8 is another single user schematic diagram of kiln waste heat utilization system of the present invention.
Reference numeral is as follows:
1 boiler, 2 main airway control valves, 3 bypass air flue control valves, 4 air flue control valves, 5 airway 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 user's radiator inlet temperature sensors, 33 user's radiator outlet temperature sensors, 34 user's radiator flowmeters, 35 calorimeters, 36 user's radiator valves, 37 flue collectors, 38 bypass flues, 39 bypass flue entrances, 40 bypass flue outlets, 41 ancillary heating equipment, 42 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 37, bypass flue 38 and air-water heat exchanger 6, the flue gas that described kiln produces enters air-water heat exchanger 6 by bypass flue entrance 39, and the flue gas after heat exchange discharges after flowing into flue collector 37 by the outlet 40 of bypass flue.
Flue collector control valve 2 is set between the bypass flue entrance 39 and bypass flue outlet 40 of flue collector 37, for regulating the exhaust gas volumn of flue collector, bypass flue control valve 3 is set on bypass flue 38 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 40 of the bypass flue of flue collector 37, 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 42 be connected with Programmable Logic Controller eighteen data is only set on bypass flue, regulates by the frequency changing frequency converting induced draft fan 42 exhaust gas volumn entering bypass flue 40.If the temperature measured is too low, then Programmable Logic Controller 18 reduces by the frequency turning frequency converting induced draft fan 42 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,
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.
Heat exchanger 13 is connected with heat user feed pipe 14 and heat user return pipe 15, heat user radiator (see Fig. 1-2) 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;
Heat user radiator is the multiple of parallel connection, and Fig. 1-2 show only two, but is not limited to two, and conveniently, the associated components related in radiator parallel transistor in Fig. 1-2, such as temperature sensor, flowmeter etc. show only one.
The outlet pipe of each heat user radiator is arranged flowmeter 34, for detecting the flow of the water in radiator, the water inlet of each heat user radiator and delivery port arrange inflow temperature sensor 32 and leaving water temperature sensors 33 respectively, be respectively used to the inflow temperature and the leaving water temperature that detect radiator, calorimeter 35 respectively with flowmeter 34, inflow temperature sensor 33 and leaving water temperature sensors 34 data cube computation, for calculating the heat that heat user expends; The water inlet pipe of each heat user radiator is provided with flow control valve 36, for regulating separately the flow entering the water of radiator, described Programmable Logic Controller 18 and calorimeter 35, control valve 36 data cube computation, for automatically controlling kiln waste heat utilization system; The data that the heat of user uses are passed to Programmable Logic Controller 18 by calorimeter 35, 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 36 and closes completely.
Above-mentioned kiln waste heat utilization system 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 36 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 preferably, described Programmable Logic Controller 18 carries out data cube computation with calorimeter 17, described calorimeter 17 carries out data cube computation with inflow temperature sensor 11, leaving water temperature sensors 12 and flowmeter 10, and calculates according to the flow of the inflow temperature measured, leaving water temperature and water the total amount of heat inputing to user; The contrast of the heat expended by the total amount of heat and each user that calculate input user, thermal loss rate can be calculated, if loss late is excessive, then should carry out scale removal work to system in time, the cost of reasonable computation units of heat can also be carried out simultaneously according to thermal loss rate.
Described Programmable Logic Controller 18 carries out data cube computation with control valve 9, when radiator control valve 36 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 aperture of control valve 36, thus the hot water of input heat exchanger 13 is changed accordingly, such as, reduce accordingly, 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, 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.
Fig. 7-8 illustrates the schematic diagram of single user.As shown in Figure 7, 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 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;
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 kiln waste heat utilization system 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 (Fig. 7 is 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 is simultaneously out of service.
Preferably, Programmable Logic Controller calculates the remaining heat of user automatically, when user's heat surplus reaches the first data, circulating pump, to the first aperture lower than normal aperture, is adjusted to the first power lower than normal operate power by Programmable Logic Controller adjustment control valve simultaneously; When user's heat surplus reaches lower than the first data second data, circulating pump, to the second aperture lower than the first aperture, is adjusted to the second power lower than the first power by Programmable Logic Controller adjustment control valve simultaneously; When user's heat surplus reaches lower than the second data the 3rd data, circulating pump, to the 3rd aperture lower than the second aperture, is adjusted to the 3rd power lower than the second power by Programmable Logic Controller adjustment control valve simultaneously; When user's heat surplus reaches lower than the 3rd data the 4th data, circulating pump, to the 4th aperture lower than the 3rd aperture, is adjusted to the 4th power lower than the 3rd power by Programmable Logic Controller adjustment control valve simultaneously; When user's heat surplus reaches lower than the 4th data the 5th data, circulating pump, to the 5th aperture lower than the 4th aperture, is adjusted to the 5th power lower than the 4th power by Programmable Logic Controller adjustment control valve simultaneously; When user's heat surplus reaches lower than the 5th data the 6th data, circulating pump, to the 6th aperture lower than the 5th aperture, is adjusted to the 6th power lower than the 5th power by Programmable Logic Controller adjustment control valve simultaneously; Last when user's heat surplus reaches close to zero, Programmable Logic Controller adjustment control valve cuts out completely, stops the operation of circulating pump simultaneously.
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.
The embodiment other guide of Fig. 7-8 is identical with the embodiment content of Fig. 1-2, is not described further.
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 (3)
1. a 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, heat exchange is carried out with the water from cold-water return pipe in air-water heat exchanger, hot water feeding pipe is entered after water heating, 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 is arranged the first control valve, to regulate the hot water entered in heat exchanger;
The inlet pipeline of heat user radiator arranges the second control valve, Programmable Logic Controller and the first control valve and the second control valve carry out data cube computation, during the second control valve opening change, the aperture of the first control valve changes accordingly, thus the hot water of input heat exchanger is changed accordingly.
2. kiln waste heat utilization system as claimed in claim 1, it is characterized in that, described system comprises cold-water return pipe, control valve, heat exchanger, heat user flow pipe, heat user return pipe, circulating pump, flowmeter, calorimeter, 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;
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 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 is arranged on the heat user return pipe between user's radiator and heat exchanger;
Described heat user radiator is the multiple of parallel connection, the outlet pipe of each heat user radiator arranges flowmeter, for detecting the flow of the water in heat user radiator; Water inlet and the delivery port of each heat user radiator arrange inflow temperature sensor and leaving water temperature sensors, for measuring the Inlet and outlet water temperature of heat user radiator; The water inlet pipe of each heat user radiator arranges user's control valve;
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 calorimeter and control valve carry out data cube computation, for automatically controlling kiln waste heat utilization system; 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.
3. kiln waste heat utilization system as claimed in claim 2, it is characterized in that, 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510115030.1A CN104713376B (en) | 2014-04-14 | 2014-04-14 | The using residual heat from kiln furnace system that hot water amount in input heat exchanger controls automatically |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510115030.1A CN104713376B (en) | 2014-04-14 | 2014-04-14 | The using residual heat from kiln furnace system that hot water amount in input heat exchanger controls automatically |
| CN201410146686.5A CN103940249B (en) | 2014-04-14 | 2014-04-14 | Multiuser-oriented automatic measuring and controlling energy-saving kiln waste heat utilization system |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410146686.5A Division CN103940249B (en) | 2014-04-14 | 2014-04-14 | Multiuser-oriented automatic measuring and controlling energy-saving kiln waste heat utilization system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104713376A true CN104713376A (en) | 2015-06-17 |
| CN104713376B CN104713376B (en) | 2016-03-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510116691.6A Expired - Fee Related CN104713379B (en) | 2014-04-14 | 2014-04-14 | Based on the using residual heat from kiln furnace system of exhaust gas temperature Intelligent adjustment flue control valve opening |
| CN201510115662.8A Expired - Fee Related CN104713377B (en) | 2014-04-14 | 2014-04-14 | According to the using residual heat from kiln furnace system of heat exchange amount Based Intelligent Control electric heating equipment |
| CN201510115028.4A Expired - Fee Related CN104697347B (en) | 2014-04-14 | 2014-04-14 | The using residual heat from kiln furnace system that automatic control ancillary heating equipment starts |
| CN201510115030.1A Expired - Fee Related CN104713376B (en) | 2014-04-14 | 2014-04-14 | The using residual heat from kiln furnace system that hot water amount in input heat exchanger controls automatically |
| CN201410146686.5A Expired - Fee Related CN103940249B (en) | 2014-04-14 | 2014-04-14 | Multiuser-oriented automatic measuring and controlling energy-saving kiln waste heat utilization system |
| CN201510116678.0A Expired - Fee Related CN104713378B (en) | 2014-04-14 | 2014-04-14 | The using residual heat from kiln furnace system of Based Intelligent Control user's heat amount |
Family Applications Before (3)
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| CN201510116691.6A Expired - Fee Related CN104713379B (en) | 2014-04-14 | 2014-04-14 | Based on the using residual heat from kiln furnace system of exhaust gas temperature Intelligent adjustment flue control valve opening |
| CN201510115662.8A Expired - Fee Related CN104713377B (en) | 2014-04-14 | 2014-04-14 | According to the using residual heat from kiln furnace system of heat exchange amount Based Intelligent Control electric heating equipment |
| CN201510115028.4A Expired - Fee Related CN104697347B (en) | 2014-04-14 | 2014-04-14 | The using residual heat from kiln furnace system that automatic control ancillary heating equipment starts |
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| CN201410146686.5A Expired - Fee Related CN103940249B (en) | 2014-04-14 | 2014-04-14 | Multiuser-oriented automatic measuring and controlling energy-saving kiln waste heat utilization system |
| CN201510116678.0A Expired - Fee Related CN104713378B (en) | 2014-04-14 | 2014-04-14 | The using residual heat from kiln furnace system of Based Intelligent Control user's heat amount |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104534871B (en) * | 2015-01-11 | 2016-03-16 | 山东理工大学 | Based on the auxiliary heating residual heat of tunnel kiln intelligence control system of cloud process |
| CN104613753B (en) * | 2015-01-11 | 2016-03-16 | 山东理工大学 | Residual heat of tunnel kiln based on cloud process utilizes blower fan frequency control system |
| CN104501610B (en) * | 2015-01-11 | 2016-03-16 | 山东理工大学 | Residual heat of tunnel kiln intelligence based on cloud computing utilizes system |
| CN104613754B (en) * | 2015-01-11 | 2016-03-16 | 山东理工大学 | Residual heat of tunnel kiln based on cloud computing utilizes temperature control system |
| CN105605649A (en) * | 2016-02-26 | 2016-05-25 | 中国人民解放军总后勤部建筑工程研究所 | Waste heat heating system |
| CN107869727A (en) * | 2016-09-27 | 2018-04-03 | 湖南中集竹木业发展有限公司 | A kind of heat exchanger and heat-exchange method |
| 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 |
| CN112629304A (en) * | 2020-12-17 | 2021-04-09 | 国网河北省电力有限公司电力科学研究院 | Coal-fired flue gas waste heat recovery device and method |
Citations (3)
| 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 |
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2014
- 2014-04-14 CN CN201510116691.6A patent/CN104713379B/en not_active Expired - Fee Related
- 2014-04-14 CN CN201510115662.8A patent/CN104713377B/en not_active Expired - Fee Related
- 2014-04-14 CN CN201510115028.4A patent/CN104697347B/en not_active Expired - Fee Related
- 2014-04-14 CN CN201510115030.1A patent/CN104713376B/en not_active Expired - Fee Related
- 2014-04-14 CN CN201410146686.5A patent/CN103940249B/en not_active Expired - Fee Related
- 2014-04-14 CN CN201510116678.0A patent/CN104713378B/en not_active Expired - Fee Related
Patent Citations (3)
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104713379B (en) | 2016-03-16 |
| CN104697347A (en) | 2015-06-10 |
| CN104713379A (en) | 2015-06-17 |
| CN103940249B (en) | 2015-03-25 |
| CN103940249A (en) | 2014-07-23 |
| CN104713376B (en) | 2016-03-16 |
| CN104713378A (en) | 2015-06-17 |
| CN104713377A (en) | 2015-06-17 |
| CN104713377B (en) | 2016-03-16 |
| CN104713378B (en) | 2016-03-16 |
| CN104697347B (en) | 2016-03-16 |
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