CN102748860B - Combined high-power condensing boiler and control method thereof - Google Patents
Combined high-power condensing boiler and control method thereof Download PDFInfo
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- CN102748860B CN102748860B CN201210246961.1A CN201210246961A CN102748860B CN 102748860 B CN102748860 B CN 102748860B CN 201210246961 A CN201210246961 A CN 201210246961A CN 102748860 B CN102748860 B CN 102748860B
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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 discloses a combined high-power condensing boiler and a control method thereof. The boiler comprises at least one condensing boiler heat exchanger, each condensing boiler heat exchanger is arranged in a boiler frame, adjacent boiler frames are connected through a fastening device, and each condensing boiler heat exchanger is provided with an intelligent control system comprising a heat exchanger control module box and two combustion engine control modules, wherein the heat exchanger control module box is arranged in the heat exchanger, and the combustion engine control modules are arranged in the heat exchanger control module box. According to the condensing boiler and the control method thereof, the power of the boiler can be increased on the premise of controlling cost, diversified requirements of customers are met while types of the heat exchangers are decreased, and batch production is possible.
Description
Technical field
The present invention relates to a kind of composite boiler, be specifically related to a kind of combined high-power condensing boiler.
Background technology
Condensing boiler has the feature of high-efficient energy-saving environment friendly, it is the developing direction of boiler industry, the technology of current small-sized condensing boiler or condensing gas water heater is ripe gradually, but because the design of heat exchanger, processing, mass production have difficulties, condensation technology is made slow progress to large scale business boiler conversion process.Single heat exchanger condensing boiler maximum is in the world 570KW at present.
Because condensing boiler can produce a large amount of faintly acid condensed waters in combustion, therefore its heat exchanger must use stainless steel or cast aluminium to process.For casting aluminium material, be mature on the whole by the technology of cast-aluminum die processing Mini-type heat exchanger, but because large-scale cast aluminium piece exists, die cost is high, processing technology is complicated, the high difficulty of product rejection rate, and making at present cannot with the direct processing high-power heat exchanger of cast-aluminum die; And for stainless steel, small-sized stainless heat exchanger can adopt machine automatic welding, and large-size stainless steel heat exchanger can only be human weld at present, and its production efficiency is low, processing cost is high and difficult quality guarantee.
In order to obtain powerful condensing boiler, another kind of mode is on conventional boiler basis, in flue, increase condensing heat exchanger, and it achieves certain condensation effect, but problem is: increase condensing heat exchanger in (1) flue and take up room very large; (2) be not an organic whole, combustion system will adjust accordingly; (3) potentiality of condensation are not excavated out completely.
On the other hand, 100% air fuel gas premix technology improves boiler efficiency, and falling an oligosaprobic important means, is one of condensing boiler key technology.But the application of this technology limits the size of single combustion system and heat exchanger, the capacity of boiler be increased, composite boiler technology must be used.And the existing multiple stage boiler interlock realized by external multiple stage boiler controller at present, all have that boiler floor space is large, the parts of boiler can not share, increase the shortcoming of processing and use cost, and external connection line road is complicated, installs difficulty.
Conventional boiler only has a set of Heat supply and heat exchange system, and the boiler that must manufacture and design plurality of specifications like this, to meet the different demand of client, adds the cost manufactured and designed, is unfavorable for realizing mass production.
Summary of the invention
The object of the invention is to provide a kind of combined high-power condensing boiler and control method thereof, and it can realize the interlock of multiple combustor, and decrease the kind of heat exchanger, make mass production become possibility, the power of condensing boiler is improved; Reduce costs, simplified design; The thermal efficiency is higher.
For achieving the above object, the technical solution used in the present invention is: a kind of combined high-power condensing boiler: comprise at least 1 condensing boiler heat exchanger, every platform condensing boiler heat exchanger is arranged in a set of boiler frame, and adjacent boiler frame is connected by fastener;
Every platform condensing boiler heat exchanger is equipped with 2 cover combustors, often overlap combustor and be furnished with high temperature alarm warming, water supply warming, backwater warming and high temperature fuse separately, 2 cover combustor common flues, water inlet pipe, outlet pipe, condensed water discharge outlet, common heat exchanger water supply warming, flow switch, these three balancing boom devices of cigarette sense and discharging valve, safety valve, air bleeding valve three valves;
Every platform condensing boiler heat exchanger is provided with intelligence control system, intelligence control system comprises every platform heat exchanger and arranges a heat exchanger control module box, built-in two combustor control modules, one is main control module, another is sub-control module, each control module controls a burner, wherein main control module connection runs alone required balancing boom device and all shared balancing boom devices, sub-control module only connects runs alone required balancing boom device, main control module controls sub-control module by holding wire, main control module determines the start and stop order of two combustors.
A kind of preferred version as combined high-power condensing boiler of the present invention: described combined high-power condensing boiler comprises two condensing boiler heat exchangers;
Described intelligence control system also includes communication module and total display, condensing boiler is provided with total display, total display is connected and installed with communication module box, built-in two communication modules, be connected with two heat exchanger control module boxes of two heat exchangers respectively by terminal box, there are two combustor control modules in each heat exchanger control module box, are set to main control module and sub-control module respectively; In the main heat exchanger control module of heat exchanger, select a main combustor control module to be set to total combustor control module, total combustor control module be connected with total display, total display and total combustor control module are cooperatively provided with interlock software.
A kind of preferred version as combined high-power condensing boiler of the present invention: described combined high-power condensing boiler comprises four condensing boiler heat exchangers;
Described intelligence control system also includes communication module and total display, condensing boiler is provided with total display, total display is connected and installed with communication module box, built-in four communication modules, be connected with four heat exchanger control module boxes of four heat exchangers respectively by terminal box, there are two combustor control modules in each heat exchanger control module box, are set to main control module and sub-control module respectively; In the main heat exchanger control module of heat exchanger, select a main combustor control module to be set to total combustor control module, total combustor control module be connected with total display, total display and total combustor control module are cooperatively provided with interlock software.
A kind of preferred version as combined high-power condensing boiler of the present invention: described combined high-power condensing boiler comprises N platform condensing boiler heat exchanger, N be greater than 1 natural number;
Described intelligence control system also includes communication module and total display, condensing boiler is provided with total display, total display is connected and installed with communication module box, built-in N number of communication module, is connected with N number of combustor control module box of N platform heat exchanger respectively by terminal box.
A kind of preferred version as combined high-power condensing boiler of the present invention: described communication module box, to connect with dismountable wire harness between terminal box and burner control module box, the two ends of wire harness are provided with the connector of working in coordination.
A control method for combined high-power condensing boiler of the present invention, comprises the following steps:
When condensing boiler receives heating desired signal, need to carry out three grades of PID logic controlling calculation; Total display and total combustor control module carry out first order PID logic controlling calculation and compensation calculation according to system warming temperature value and boiler setting value, and the desired value calculated are issued the heat exchanger of the First startup that total display is determined; The heat exchanger control module of the heat exchanger that First starts is according to the temperature value of desired value and heat exchanger water supply warming, carry out second level PID logic controlling calculation and compensation calculation, then the desired value calculated is issued the combustor control module first started in order in two combustor control modules; First the water supply warming temperature value that the combustor control module started is connected with self according to desired value carries out third level PID logic controlling calculation, determines the rotating speed of blower fan and exerting oneself of burner;
When first start heat exchanger exert oneself reach pre-set parameter time, when the system warming temperature value of boiler does not reach boiler setting value yet, then delayed startup second heat exchanger; At this moment total combustor control module and total display carry out first order PID logic controlling calculation and compensation calculation according to system warming temperature value and boiler setting value, the desired value calculated, by total display and the communication module be connected, issues the main combustor control module of the heat exchanger started; Main combustor control module carries out second level PID logic controlling calculation and compensation calculation according to heat exchanger water supply warming temperature value and desired value, and the desired value calculated is given two combustor control modules; Two combustor control modules carry out the calculating of third level PID logic according to this desired value and self water supply warming temperature value, determine exerting oneself of two combustors;
If when the exerting oneself of two of the heat exchanger started combustors all reaches pre-set parameter, when the system warming temperature value of boiler still can not reach boiler setting value, total burner control module and total display are according to the address of communication module, start second heat exchanger, control identical with startup First heat exchanger with the principle calculated;
If when the exerting oneself of two of second heat exchanger combustors also all reaches pre-set parameter, when the system warming temperature value of boiler still can not reach boiler setting value, then restart the 3rd heat exchanger, until the combustor of all heat exchangers all starts.
As a kind of preferred version of the control method of described combined high-power condensing boiler, further comprising the steps of: when steam generator system warming temperature value is higher than target set point, the combustor finally started executes time delay and arranges rear closedown; Remaining combustor repeats three grades of PID logic and calculates, exerting oneself needed for confirming at present; After First combustor is closed, when steam generator system warming temperature value is also higher than target set point, other combustor is closed successively, until during last combustor remaining, if system warming temperature value is not higher than boiler setting value, then combustor is exerted oneself and lower than pre-set parameter, can be maintained little fiery stable operation; When system warming temperature value is higher than boiler target set point, boiler is closed.
As a kind of preferred version of the control method of described combined high-power condensing boiler, further comprising the steps of: when total combustor control module of condensing boiler is connected with outdoor warming, when performing outdoor temperature reset pattern, total combustor control module and total display carry out first order PID logic control algorithm according to system warming temperature value and outdoor temp temperature-sensitive angle value, control to start heat exchanger method of work identical when other control method and condensing boiler receive heating desired signal; Total display can adjust the start and stop order of heat exchanger by communication module, and the main combustor control module on heat exchanger can adjust the start and stop order of major and minor combustor.
As a kind of preferred version of the control method of described combined high-power condensing boiler, further comprising the steps of: anti-frost protection functional steps, when not receiving heating desired signal, when system warming temperature is lower than starting mode of pump setting value, total combustor control module starts heating demand water pump, is undertaken antifreeze by the flowing of water in pipeline; When system warming temperature is lower than low temperature little fire burning setting value, total combustor control module using self as separate unit boiler startup, carry out burning with minimum fire to exert oneself, sustained combustion is until when all water supply warmings, backwater warming temperature are higher than antifreeze secure setting, boiler just stops.
Because technique scheme is used, the advantage that the present invention compared with prior art has is:
1, the Heat supply and heat exchange system that combined high-power condensing boiler of the present invention joins two combustor compositions with a heat exchanger is a unit, pass through tower structure, multiple unit is carried out support to fix, be combined into the high-power condensing boiler of different size, again by intelligence control system, realize the interlock of multiple combustor, so both meet the diversified demand of client, additionally reduce the kind of heat exchanger, make mass production become possibility; Boiler power of the present invention is maximum reaches 2000KW.
2, the present invention can realize the control assemblies such as two or more heat exchanger sharing system warming, float switch, also can share the structural members such as smoke discharging pipe, air duct, condensed water seal pipe, gas pipeline, support panel beating, reduce costs, simplified design.
3, tradition is furnished with the boiler of a set of Heat supply and heat exchange system, and combusted proportion adjustable range can only within 20% ~ 100%, and the maximum proportion adjustment scope of combined high-power condensing boiler of the present invention can reach 2.5% ~ 100%.
4, the exhaust gas temperature of traditional non-condensing boiler must higher than 150 DEG C, a large amount of sensible heat of flue gas and the latent heat of steam cannot be absorbed, boiler thermal output is calculated as 75% ~ 80% by high-order calorific capacity, and the exhaust gas temperature of combined high-power condensing boiler of the present invention is lower than 60 DEG C, the thermal efficiency is up to 96%.
Accompanying drawing explanation
Fig. 1 is the right view of single heat exchanger in the embodiment of the present invention one;
Fig. 2 is the left view of single heat exchanger in the embodiment of the present invention one;
Fig. 3 is the stereogram of single heat exchanger boiler in the embodiment of the present invention one;
Fig. 4 is the PID control principle drawing of the single heat exchanger being provided with 2 burners in the embodiment of the present invention one;
Fig. 5 is the stereogram of two heat exchanger combined boilers in the embodiment of the present invention two;
Fig. 6 is the structural representation of rat tail in the embodiment of the present invention two;
Fig. 7 is the stereogram of four heat exchanger combined boilers in the embodiment of the present invention three;
Fig. 8 is the PID control principle drawing of multiple heat exchangers of 2 burners in the embodiment of the present invention three;
Fig. 9 is the stereogram of the high-power condensing boiler in the embodiment of the present invention three after combination.
The serial number name of Fig. 1 to Fig. 9:
1, blower fan; 2, single current door; 3, heat exchanger; 4, high temperature alarm warming; 5, water supply warming; 6, heat exchanger water supply warming; 7, backwater warming; 8, flow switch; 9, high temperature fuse; 10, cigarette sense; 11, discharging valve; 12, safety valve; 13, air bleeding valve; 14, heat exchanger modular cartridge; 15, sub-control module; 16, main control module; 17, communication module; 18, communication module box; 19, terminal box; 20, total display; 21, air duct; 22, gas pipeline; 23, smoke discharging pipe; 24, condensed water seal pipe.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described:
Embodiment one
Shown in Fig. 1 ~ 3, a kind of combined high-power condensing boiler, every platform condensing boiler heat exchanger 3 is arranged in a set of boiler frame, and adjacent boiler frame is connected by fastener; Its single heat exchanger 3 is furnished with the combustor that two covers are become with built-in combustion head group by blower fan 1, single current door 2, two cover combustors are furnished with high temperature alarm warming 4, water supply warming 5, backwater warming 7 and high temperature fuse 9 separately, the structure members such as two cover combustor common flues, water inlet pipe, outlet pipe, condensed water discharge outlet, common heat exchanger water supply warming 6, flow switch 8, cigarette sense 10 3 control vigour part and discharging valve 11, safety valve 12, air bleeding valve 13 3 valves.
When Heat Exchanger is assembled into boiler, at boiler front end mounting heat exchanger modular cartridge 14, built-in two combustor control modules, one of them address is set to 1, it is main control module 16, another address is set to 2, as sub-control module 15, two control modules combustor of two shown in control chart 1 respectively, wherein sub-control module only connects high temperature alarm warming 4, combustor water supply warming 5, combustor backwater warming 7 and high temperature fuse 9 these run alone required balancing boom device, main control module not only connects and runs alone these required four balancing boom devices, also connect all shared balancing boom devices, main control module controls sub-control module by holding wire.
As shown in Figure 4, for the boiler of Heat Exchanger composition, when boiler receives heating desired signal or domestic hot-water's desired signal, need two-stage PID logic controlling calculation, the heat exchanger water supply warming temperature value that the inspection of main combustor control module is current and boiler setting value, if heat exchanger water supply warming temperature value is lower than boiler setting value, then start a combustor, main combustor control module carries out first order PID logic controlling calculation and compensation calculation according to heat exchanger water supply warming temperature value and boiler setting value simultaneously, the desired value calculated is supplied to the combustor control module started, the combustor control module started carries out second level PID logic controlling calculation according to the water supply warming temperature value of self and this desired value, determine exerting oneself of combustor, and by regulating rotation speed of fan to realize exerting oneself of combustor.
Exert oneself when the combustor started and reach predetermined value, as 60% time, when heat exchanger water supply warming temperature value is still lower than boiler setting value, treat that time delay arranges end, main combustor control module starts second combustor, carry out the calculating of PID control logic and compensation calculation according to current heat exchanger water supply warming temperature value and boiler setting value simultaneously, the desired value calculated is supplied to two combustor control modules, two combustor control modules carry out PID calculating according to desired value and respective water supply warming temperature value, determine that respective combustor is exerted oneself.
Exert oneself lower than setting value when a combustor, as 40% time, the combustor finally started is closed.The desired value that remaining combustor control module calculates according to main combustor control module adjusts exerting oneself of combustor with self water supply warming temperature value current, and when water supply warming temperature value is higher than desired value, boiler is closed.
The PID of combustor control module calculates and adopts negative feedback closed loop control system.
Compensation calculation: when heat exchanger water supply warming temperature value is lower than boiler setting value, in order to make boiler output reach setting value as early as possible, the desired value that main combustor control module calculates is maximum can increase by 20 DEG C.When heat exchanger water supply warming temperature value is higher than boiler setting value, in order to reduce boiler output as early as possible, the desired value calculated can reduce at most 10 DEG C.
Delays time to control: when the conditions are met, the time delay of combustor control module runs PID and calculates, to wait for that steam generator system is in stable condition.
Main control module address is set to 1, and sub-control module's address is set to 2, and the order of two combustor control module startups can be set to rotate at regular intervals, and can guarantee that the life-span of combustor is basically identical like this.
The address of combustor control module can be set to 1 ~ 16, therefore a burner control module address is set to 1, as main control module, just can realizes the interlock of 16 combustors.
But be relatively furnished with the heat exchanger of two combustors, when multiple heat-exchange unit synthesizes a high-power condensing boiler, each heat exchanger is furnished with two combustor control modules, the address of control module is all set to 1,2, this creates the terminal address to repeat, carrying out interlock in a manner described cannot carry out.
On the intelligence control system basis of the boiler that the present invention has the heat exchanger of two combustors to form at above-mentioned separate unit, development adds communication module and total display.Two combustor control modules of each heat exchanger connect a communication module, to determine heat exchanger address; In main combustor control module, select one be connected with total display, as total combustor control module, total display and total combustor control module are cooperatively provided with interlock software.
Embodiment two
As shown in Figure 5, the high-power condensing boiler be made up of two heat exchangers, total display 20 is installed in boiler dead ahead, communication module box 18 is installed in back upper place, built-in two communication modules 17, be connected with two heat exchanger control module boxes 14 respectively by terminal box 19, have two combustor control modules in each heat exchanger control module box, be set to main control module and sub-control module respectively.One of them main control module is set to total combustor control module.Communication module box, to connect with dismountable wire harness between terminal box and combustor control module box.
As shown in Figure 6, composite boiler has the advantages that the assemblies such as heat exchanger, combustor, frame support, control box can be installed at the scene to rat tail, and compared with a monoblock type high-capacity boiler, the difficulty of carrying and installation reduces a lot.But the complexity of the inner wire harness of composite boiler increases greatly, if all wiring at the scene, require very high to the skills training of installer, the probability of makeing mistakes is very large.Combustor control module box, communication module box, terminal box and strand design thereof needed for every platform heat exchanger is become independently unit by the present invention, carry out producing in batches in inside plants and check, rat tail between each control box, be designed to demountable structure, be connected with control box by the connector at wire harness two ends, and by selecting different connectors, realize fool-proof design.So both improve the production efficiency of control box, make again the in-site installation of boiler simple and convenient.
Embodiment three
As shown in Figure 7, the high-power condensing boiler be made up of four heat exchangers, its control system is also made up of communication module box 18, four heat exchanger modular cartridges 14 of total display 20, built-in four communication modules 17 and rat tail.
As shown in Figure 8, when heating desired signal received by boiler, need to carry out three grades of PID logic controlling calculation, total display and total combustor control module carry out first order PID logic controlling calculation and compensation calculation according to system warming temperature value and boiler setting value, and the desired value calculated are issued the heat exchanger of the First startup that total display is determined; The main combustor control module of the heat exchanger that First starts is according to the temperature value of desired value and heat exchanger water supply warming, carry out second level PID logic controlling calculation and compensation calculation, again the desired value calculated is issued the combustor control module first started in order in two combustor control modules, first the water supply warming temperature value that the combustor control module started is connected with self according to desired value carries out third level PID logic controlling calculation, determines the rotating speed of blower fan and exerting oneself of combustor.
When first start heat exchanger exert oneself reach pre-set parameter time, such as 60%, when the system warming temperature value of boiler does not reach boiler setting value yet, then delayed startup second heat exchanger.At this moment total combustor control module and total display carry out first order PID logic controlling calculation and compensation calculation according to system warming temperature value and boiler setting value, the desired value calculated is by total display and the communication module be connected, issue the main control module of the heat exchanger started, main control module carries out second level PID logic controlling calculation and compensation calculation according to heat exchanger water supply warming temperature value and desired value, and the desired value calculated is given two combustor control modules, two combustor control modules carry out the calculating of third level PID logic according to this desired value and self water supply warming temperature value, determine exerting oneself of two combustors.
If when the exerting oneself of two of the heat exchanger started combustors all reaches pre-set parameter, when the system warming temperature value of boiler still can not reach boiler setting value, total combustor control module and total display are according to the address of communication module, start second heat exchanger, the principle controlled and calculate is the same, until all combustors start.
When steam generator system warming temperature value is higher than target set point, the combustor finally started executes time delay and arranges rear closedown.Remaining combustor repeats three grades of PID logic and calculates, exerting oneself needed for confirming at present.In like manner other combustor is closed successively, until during last combustor remaining, if system warming temperature value is not higher than boiler setting value, then exert oneself can lower than pre-set parameter for combustor, and such as 40%, maintain little fiery stable operation; When system warming temperature value is higher than boiler target set point, boiler is closed.
When total combustor control module of boiler is connected with outdoor warming, when performing outdoor temperature reset pattern, total combustor control module and total display carry out first order PID logic control algorithm according to system warming temperature value and outdoor temp temperature-sensitive angle value, other control method is identical with heating pattern, can provide more comfortable environment for client and save the more energy in this case.
Total display can adjust the start and stop order of heat exchanger by communication module, and the main control module on heat exchanger can adjust the start and stop order of major and minor combustor, can guarantee that the life-span of each heat exchanger, combustor is basically identical like this.
As can be seen here, under heating demand model, this intelligence control system can control accurately reasonably exerting oneself of each combustor, thus improves boiler efficiency to greatest extent, reduces the waste of the energy.Need boiler to start fast for domestic hot-water's demand model etc., when based on big fire burning, as long as the external wire harness after changing in control box, the start and stop simultaneously of multiple stage heat exchanger, grouping start and stop can be realized, thus shorten heating time.
This intelligence control system also has anti-frost protection function; when not receiving heating desired signal; when system warming temperature is lower than starting mode of pump setting value, total combustor control module starts heating demand water pump, is undertaken antifreeze by the flowing of water in pipeline.When system warming temperature is lower than low temperature little fire burning setting value, total combustor control module using self as separate unit boiler startup, carry out burning with minimum fire to exert oneself, sustained combustion is until when all water supply warmings, backwater warming temperature are higher than antifreeze secure setting, boiler just stops.
As shown in Figure 9, high-power condensing boiler after combination, every two combustors share an air duct 21 and a gas pipeline 22, the recirculation of flue gas is prevented by single current door 2, and combustor control module is designed with the function of monitoring single current door, if there is abnormal conditions, combustor control module will be reported to the police.Every two heat exchangers share a set of smoke discharging pipe 23 and a set of condensed water seal pipe 24.Sharing by parts, simplifies the structure of boiler internal, is convenient to manufacture and the installation of boiler, decreases the quantity of space needed for boiler erection and external pipe.
In addition, be that 1360 × 758mm calculates with the length of a boiler × wide, when four boiler horizontal layout are in boiler room, minimum floor space is 15.73 square meters; And when four boiler combination become high-power condensing boiler, minimum floor space only has 6.5 squares, reduction effect is obvious.
It should be noted that, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although with reference to preferred embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that, can modify to technical scheme of the present invention or equivalent replacement, and not departing from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.
Claims (9)
1. a combined high-power condensing boiler, is characterized in that: comprise at least 1 condensing boiler heat exchanger, and every platform condensing boiler heat exchanger is arranged in a set of boiler frame, and adjacent boiler frame is connected by fastener;
Every platform condensing boiler heat exchanger is equipped with 2 cover combustors, often overlaps combustor and is furnished with high temperature alarm warming, water supply warming, backwater warming and high temperature fuse separately, 2 cover combustor common flues, water inlet pipe, outlet pipe, condensed water discharge outlet; Common heat exchanger water supply warming, flow switch, these three balancing boom devices of cigarette sense and discharging valve, safety valve, air bleeding valve three valves;
Every platform condensing boiler heat exchanger is provided with intelligence control system, intelligence control system comprises every platform heat exchanger and arranges a heat exchanger control module box, built-in two combustor control modules, one is main control module, another is sub-control module, each control module controls a combustor, wherein main control module connection runs alone required balancing boom device and all shared balancing boom devices, sub-control module only connects runs alone required balancing boom device, main control module controls sub-control module by holding wire, main control module determines the start and stop order of two combustors.
2. combined high-power condensing boiler according to claim 1, is characterized in that: described combined high-power condensing boiler comprises two condensing boiler heat exchangers;
Described intelligence control system also includes communication module and total display, condensing boiler is provided with total display, total display is connected and installed with communication module box, built-in two communication modules, be connected with two heat exchanger control module boxes of two heat exchangers respectively by terminal box, there are two combustor control modules in each heat exchanger control module box, are set to main control module and sub-control module respectively; In the main heat exchanger control module of heat exchanger, select a main combustor control module to be set to total combustor control module, total combustor control module be connected with total display, total display and total combustor control module are cooperatively provided with interlock software.
3. combined high-power condensing boiler according to claim 1, is characterized in that: described combined high-power condensing boiler comprises four condensing boiler heat exchangers;
Described intelligence control system also includes communication module and total display, condensing boiler is provided with total display, total display is connected and installed with communication module box, built-in four communication modules, be connected with four heat exchanger control module boxes of four heat exchangers respectively by terminal box, there are two combustor control modules in each heat exchanger control module box, are set to main control module and sub-control module respectively; In the main heat exchanger control module of heat exchanger, select a main combustor control module to be set to total combustor control module, total combustor control module be connected with total display, total display and total combustor control module are cooperatively provided with interlock software.
4. combined high-power condensing boiler according to claim 2, is characterized in that: described combined high-power condensing boiler comprises N platform condensing boiler heat exchanger, N be greater than 1 natural number;
Described intelligence control system also includes communication module and total display, condensing boiler is provided with total display, total display is connected and installed with communication module box, built-in N number of communication module, is connected with N number of heat exchanger control module box of N platform heat exchanger respectively by terminal box.
5. according to described combined high-power condensing boiler arbitrary in claim 2 to 4, it is characterized in that: described communication module box, to connect with dismountable wire harness between terminal box and burner control module box, the two ends of wire harness are provided with the connector of working in coordination, and play fool-proof design like this in assembling.
6. a control method for the combined high-power condensing boiler in Claims 1-4 described in arbitrary claim, is characterized in that:
When condensing boiler receives heating desired signal, need to carry out three grades of PID logic controlling calculation; Total display and total combustor control module carry out first order PID logic controlling calculation and compensation calculation according to system warming temperature value and boiler setting value, and the desired value calculated are issued the heat exchanger of the First startup that total display is determined; The heat exchanger control module of the heat exchanger that First starts is according to the temperature value of desired value and heat exchanger water supply warming, carry out second level PID logic controlling calculation and compensation calculation, then the desired value calculated is issued the combustor control module first started in order in two combustor control modules; First the water supply warming temperature value that the combustor control module started is connected with self according to desired value carries out third level PID logic controlling calculation, determines the rotating speed of blower fan and exerting oneself of burner;
When first start heat exchanger exert oneself reach pre-set parameter time, when the system warming temperature value of boiler does not reach boiler setting value yet, then delayed startup second heat exchanger; At this moment total combustor control module and total display carry out first order PID logic controlling calculation and compensation calculation according to system warming temperature value and boiler setting value, the desired value calculated, by total display and the communication module be connected, issues the main combustor control module of the heat exchanger started; Main combustor control module carries out second level PID logic controlling calculation and compensation calculation according to heat exchanger water supply warming temperature value and desired value, and the desired value calculated is given two combustor control modules; Two combustor control modules carry out the calculating of third level PID logic according to this desired value and self water supply warming temperature value, determine exerting oneself of two combustors;
If when the exerting oneself of two of the heat exchanger started combustors all reaches pre-set parameter, when the system warming temperature value of boiler still can not reach boiler setting value, total burner control module and total display are according to the address of communication module, start second heat exchanger, control identical with startup First heat exchanger with the principle calculated;
If when the exerting oneself of two of second heat exchanger combustors also all reaches pre-set parameter, when the system warming temperature value of boiler still can not reach boiler setting value, then restart the 3rd heat exchanger, until the combustor of all heat exchangers all starts.
7. the control method of combined high-power condensing boiler according to claim 6, is characterized in that, further comprising the steps of: when steam generator system warming temperature value is higher than target set point, the combustor finally started executes time delay and arranges rear closedown; Remaining combustor repeats three grades of PID logic and calculates, exerting oneself needed for confirming at present; After First combustor is closed, when steam generator system warming temperature value is also higher than target set point, other combustor is closed successively, until during last combustor remaining, if system warming temperature value is not higher than boiler setting value, then combustor is exerted oneself and lower than pre-set parameter, can be maintained little fiery stable operation; When system warming temperature value is higher than boiler target set point, boiler is closed.
8. the control method of combined high-power condensing boiler according to claim 6, it is characterized in that, further comprising the steps of: when total combustor control module of condensing boiler is connected with outdoor warming, when performing outdoor temperature reset pattern, total combustor control module and total display carry out first order PID logic control algorithm according to system warming temperature value and outdoor temp temperature-sensitive angle value, control to start heat exchanger method of work identical when other control method and condensing boiler receive heating desired signal; Total display can adjust the start and stop order of heat exchanger by communication module, and the main combustor control module on heat exchanger can adjust the start and stop order of major and minor combustor.
9. the control method of combined high-power condensing boiler according to claim 6, it is characterized in that, further comprising the steps of: anti-frost protection functional steps, when not receiving heating desired signal, when system warming temperature is lower than starting mode of pump setting value, total combustor control module starts heating demand water pump, is undertaken antifreeze by the flowing of water in pipeline; When system warming temperature is lower than low temperature little fire burning setting value, total combustor control module using self as separate unit boiler startup, carry out burning with minimum fire to exert oneself, sustained combustion is until when all water supply warmings, backwater warming temperature are higher than antifreeze secure setting, boiler just stops.
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| CN104896755B (en) * | 2015-06-12 | 2018-03-09 | 苏州帝洛普环境科技有限公司 | A kind of control system and method for combination type gas condensation thermal power plant unit |
| CN106288370B (en) * | 2016-09-07 | 2021-09-24 | 河北工业大学 | Gas boiler based on porous medium combustion technology |
| CN110274384A (en) * | 2019-05-15 | 2019-09-24 | 威能(无锡)供热设备有限公司 | Gas and hot water equipment |
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