CN113898949A - Balanced control method of sectional type combustor, combustor and wall-mounted furnace - Google Patents

Balanced control method of sectional type combustor, combustor and wall-mounted furnace Download PDF

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Publication number
CN113898949A
CN113898949A CN202111210914.7A CN202111210914A CN113898949A CN 113898949 A CN113898949 A CN 113898949A CN 202111210914 A CN202111210914 A CN 202111210914A CN 113898949 A CN113898949 A CN 113898949A
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group
nozzles
combustion mode
combustor
working
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CN202111210914.7A
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CN113898949B (en
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嵇永飞
梁辉
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Dongguan Arcio Heat Energy Equipment Co ltd
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Dongguan Arcio Heat Energy Equipment Co ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/60—Devices for simultaneous control of gas and combustion air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/18—Arrangement or mounting of grates or heating means
    • F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
    • F24H9/1832—Arrangement or mounting of combustion heating means, e.g. grates or burners
    • F24H9/1836—Arrangement or mounting of combustion heating means, e.g. grates or burners using fluid fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/20—Arrangement or mounting of control or safety devices
    • F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
    • F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2237/00—Controlling
    • F23N2237/02—Controlling two or more burners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2239/00—Fuels
    • F23N2239/04—Gaseous fuels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2241/00—Applications
    • F23N2241/04—Heating water

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Incineration Of Waste (AREA)
  • Feeding And Controlling Fuel (AREA)

Abstract

The invention relates to a balance control method of a sectional type combustor, which comprises the following steps: s10: judging whether the fire grate enters a sectional combustion mode or a full-section combustion mode according to the heat load requirement; s20: acquiring a difference delta T of the accumulated operation time of the group A nozzles and the group B nozzles; s30: determining a group of nozzles operating in a staged combustion mode based on the value of Δ T; s40: supplying air to the nozzles of the working group, performing ignition treatment at the nozzles of the working group, and stopping air supply and performing no-ignition treatment on the nozzles of the rest group; continuously monitoring the value of delta T; and exchanging the working group and the rest group of the fire row according to the change of the delta T. The invention also provides a burner and a wall-mounted furnace. According to the difference value of the accumulated running time of the two groups of nozzles of the fire grate, the working group and the rest group of the nozzles in the sectional combustion mode are adjusted, so that the working frequency between the two groups of nozzles is balanced, the combustion balance is improved, and the effective service life of the wall-mounted furnace is prolonged.

Description

Balanced control method of sectional type combustor, combustor and wall-mounted furnace
Technical Field
The invention relates to the technical field of heating equipment, in particular to a balance control method of a sectional type combustor, the combustor and a wall-mounted boiler.
Background
The wall-mounted boiler is a water heating device which can heat indoor heat and domestic water. For a gas-fired wall-hanging stove, when the gas-fired wall-hanging stove works, a burner of the gas-fired wall-hanging stove releases heat by burning gas, so that the temperature of air in a combustion chamber is raised. And then, the heated air and the heating water exchange heat through the heat exchanger, so that the heating water is heated. The heating water can be supplied to indoor heat dissipation terminals (such as heating radiators and floor heating), and can also exchange heat with domestic water through the heat exchanger to heat the domestic water.
Burners in wall-mounted furnaces are usually provided with a fire grate provided with a plurality of nozzles. In order to better control the burner, reduce the minimum heat load of the whole machine and be convenient for adjust the water temperature, designers can set the fire grate into a segmented structure. Generally, a designer divides a plurality of nozzles into a group a and a group B, and the same group of nozzles is connected with the same gas path. The corresponding gas circuit is controlled and gated through a burner proportional valve and an electromagnetic valve, the A group of nozzles can be controlled to work independently (a sectional combustion mode), and the A group of nozzles and the B group of nozzles can be controlled to work simultaneously (a full combustion mode). The disadvantage of this design is that each burner start-up is fixed at the group a nozzles for ignition, the group a nozzles are always in operation, while the group B nozzles are only started when the group a nozzles are operating alone and cannot meet the thermal load requirements, resulting in the group a nozzles operating at a much higher frequency than the group B nozzles. Correspondingly, the working frequency of the heat exchanger area corresponding to the group A nozzles is far higher than that of the heat exchanger area corresponding to the group B nozzles, the balance of the sectional combustion is poor, and the effective service life of the wall-mounted furnace is shortened.
Disclosure of Invention
Based on the difference value of the accumulated running time of the two groups of nozzles of the fire bank, the working group and the rest group of the nozzles in the segmented combustion mode are determined, so that the working frequency between the two groups of nozzles is balanced, the combustion balance is improved, and the effective service life of the wall-mounted furnace is prolonged.
The balance control method of the sectional type combustor comprises the following steps:
s10: judging whether the fire grate enters a sectional combustion mode or a full-section combustion mode according to the heat load requirement; if the fire row is judged to enter the staged combustion mode, S20 is executed;
s20: acquiring a difference delta T of the accumulated operation time of the group A nozzles and the group B nozzles; wherein, T ═ TA-TB，TACumulative operating time for group A nozzles, TBThe accumulated running time of the B group of nozzles is obtained;
s30: determining a group of nozzles operating in a staged combustion mode based on the value of Δ T; if Δ T ∈ [0, T1) Set the group a nozzles as the working group and the group B nozzles as the rest group; if DeltaT is epsilon (-T)10), then set the B group of nozzles as the working group and the A group of nozzles as the rest group; wherein, T1Selecting boundary values for a group of preset staged combustion modes;
s40: supplying air to the nozzles of the working group, performing ignition treatment at the nozzles of the working group, and stopping air supply and performing no-ignition treatment on the nozzles of the rest group; continuously monitoring the value of delta T; when | < T2Maintaining the current working group and rest group; when | DeltaT | ═ T2When the fire is in use, the working group and the rest group of the fire grate are exchanged; wherein, T2Is a preset threshold value for dynamic adjustment in the staged combustion mode.
According to the balance control method of the sectional type combustor, the fire row is judged to enter a sectional combustion mode or a full-section combustion mode according to the heat load requirement. When the fire grate is judged to enter a sectional combustion mode, the difference value of the accumulated running time of the group A nozzles and the group B nozzles is obtained, the working group and the rest group are adjusted according to the difference value of the accumulated running time of the two groups of spray groups, and during ignition, the group with longer accumulated running time is selected as the working group, and the group with shorter accumulated running time is selected as the rest group. After combustion, the working frequency is balanced by adopting a dynamic adjustment mode. Along with the work of the burner, the difference of the accumulated running time is increased until a critical point of switching is reached, and the working group and the rest group are exchanged, so that the working frequency of the group A nozzles and the working frequency of the group B nozzles are uniformly regulated. Correspondingly, the working frequency of the heat exchanger area corresponding to the group A nozzles and the working frequency of the heat exchanger area corresponding to the group B nozzles are subjected to balanced control, the balance of the staged combustion is improved, and the effective service life of the wall-mounted furnace is prolonged. Through the design, the difference of the accumulated running time of the two groups of nozzles arranged according to fire is used for adjusting the working group and the rest group of the nozzles in the sectional combustion mode, so that the working frequency between the two groups of nozzles is balanced, the combustion balance is improved, and the effective service life of the wall-mounted furnace is prolonged.
In one embodiment, T2＝T1. Will T2Is set to be equal to T1And the delta T can be controlled to be changed in the range of (-T1, T1) all the time, the difficulty of equipment adjustment is simplified, the running stability of the equipment is improved, and the consistency of the ignition stage and the dynamic adjustment stage on parameter setting is improved.
In one embodiment, if it is judged in S10 that the fire row enters the full-range combustion mode, air is supplied to the group a nozzles and the group B nozzles, and ignition is performed at the group a nozzles and/or the group B nozzles. In the full-range combustion mode, the group A nozzles and the group B nozzles are both working groups, so that ignition can be performed alternatively or simultaneously.
In one embodiment, if it is judged in S10 that the fire row enters the full-range combustion mode, air is supplied to the group a nozzles and the group B nozzles, and the difference Δ T of the accumulated operation times of the group a nozzles and the group B nozzles is acquired; wherein, T ═ TA-TB，TACumulative operating time for group A nozzles, TBThe accumulated running time of the B group of nozzles is obtained; determining the group of nozzles ignited in the full-range combustion mode according to the value of delta T; if Δ T ∈ [0, T1) Firing at group a nozzles and not firing at group B nozzles; if DeltaT is epsilon (-T)10), ignition is performed at the group B nozzles and no ignition is performed at the group a nozzles. Since, upon alternative ignition, it is necessary to transfer the fire to the non-fired group of nozzles through the fired group of nozzles, the cumulative operating time of the fired group of nozzles increases, where the sum of the operating times is heldAnd the consistency of the parameter settings of the sectional combustion mode and the dynamic adjustment stage is realized, so that the running stability of the equipment is improved.
In one embodiment, the method for controlling the balance of the segmented combustor further comprises the following steps:
s50: and adjusting the air supply amount of the fire row until the heat load of the burner reaches the heat load requirement required by work, and enabling the burner to enter a stable combustion state.
After the burning mode of arranging when the fire and the operation route of current burning mode are confirmed, in order to let the heat load demand that the heat load of combustor can laminate work, adjust the air feed volume of arranging the fire, promote the work efficiency and the user experience of combustor.
In one embodiment, in S50, after the combustor enters the stable combustion state, if the heat load demand changes, then the method enters S60 to adjust the operation state of the combustor, and S60 includes:
s60 a: if the current combustion mode is the staged combustion mode and the heat load demand becomes smaller, jumping to S20; or, obtaining the value of the delta T when the delta T < T |)2Maintaining the current working group and rest group; when | DeltaT | ═ T2When the fire is in use, the working group and the rest group of the fire grate are exchanged; wherein, T2Is a dynamically adjusted critical value under a preset sectional combustion mode;
s60 b: if the current combustion mode is the staged combustion mode and the heat load demand is increased, jumping to S10;
s60 c: if the current combustion mode is the full-stage combustion mode and the heat load demand is smaller, jumping to S10;
s60 d: and if the current combustion mode is the full-section combustion mode and the heat load requirement is increased, adjusting the air supply quantity of the group A nozzles and the group B nozzles to adjust the heat load of the combustor.
During the actual use of the burner, the heat load demand of the user may change, i.e. the operating heat load demand is at a value that dynamically changes according to the real-time demand, so that after the burner enters a stable combustion state, if the heat load demand changes, the operating state of the burner needs to be adjusted to match the new heat load demand.
In one embodiment, executing S00 before each execution of S10, S00 includes: performing machine self-checking, and if the self-checking result is no fault, entering S10; and if the self-checking result is a fault, sending an alarm prompt. When the combustor works, the machine self-checking is carried out, and the reliability and the stability of the equipment work are improved.
The invention also provides a combustor.
The combustor is controlled by adopting the balance control method of the sectional combustor of any one embodiment.
The combustor determines the working group and the rest group of the nozzles in the sectional combustion mode according to the difference of the accumulated running time of the two groups of nozzles of the fire grate, so that the working frequency between the two groups of nozzles is balanced, the combustion balance is improved, and the effective service life of the wall-mounted furnace is prolonged.
The invention also provides the wall-mounted furnace.
The wall-mounted furnace comprises the burner.
According to the wall-mounted furnace, the combustor determines the working group and the rest group of the nozzles in the segmented combustion mode according to the difference of the accumulated running time of the two groups of nozzles of the fire grate, so that the working frequency between the two groups of nozzles is balanced, the combustion balance is improved, and the effective service life of the wall-mounted furnace is prolonged.
Drawings
Fig. 1 is a flow chart of an equalization control method of a staged combustor according to an embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
Fig. 1 shows an equalizing control method of a staged combustor according to an embodiment of the present invention.
As shown in fig. 1, the equalizing control method of the staged combustor includes the steps of:
s10: and judging whether the fire grate enters a sectional combustion mode or a full-section combustion mode according to the heat load requirement. If the fire row is judged to enter the staged combustion mode, S20 is executed.
The heat load demand is calculated according to the current heat demand of the user, such as the demand situation of heating and domestic water, which is a function commonly possessed by heating equipment and is not described herein.
S20: acquiring a difference delta T of the accumulated operation time of the group A nozzles and the group B nozzles; wherein, T ═ TA-TB，TACumulative operating time for group A nozzles, TBThe cumulative operating time for the group B nozzles.
In order to be able to regulate the operating frequencies of the group a nozzles and the group B nozzles in a balanced manner, it is therefore necessary to know the difference between the cumulative operating time of the group a nozzles and the cumulative operating time of the group B nozzles, in order to determine the operating group and the rest group in the staged combustion mode.
It should be noted that, in general, the difference Δ T between the accumulated operating times of the group a nozzles and the group B nozzles is stored in a storage medium of the device, for example, in a memory module of a controller (a control motherboard of the device), and the accumulated operating time is refreshed and recorded as the device operates. In addition, if the fire grate is replaced when in maintenance, the corresponding accumulated running time can be adjusted and set. Further, it may be possible to perform the operation by acquiring the accumulated operation times T of the group a nozzles, respectivelyAAnd cumulative operating time T of group B nozzlesBTo indirectly obtain Δ T, TAAnd TBThe acquisition mode of (2) is referenced to Δ T.
S30: the group of nozzles operating in the staged combustion mode is determined from the value of Δ T. If Δ T ∈ [0, T1) Set the group a nozzles as the working group and the group B nozzles as the rest group; if DeltaT is epsilon (-T)10), then set the B group of nozzles as the working group and the A group of nozzles as the rest group; wherein, T1The boundary values are selected for the group of predefined staged combustion modes.
Note that T is1As a preset value, it can be adjusted according to the requirements. In the present scheme, however, Δ T < T is not considered1And Δ T > T1The reason for (1) is that the delta T is artificially controlled to be always at (-T) by a preset mode1，T1) And (4) the following steps.
According to the interval where the difference value between the accumulated operation time of the group A nozzles and the accumulated operation time of the group B nozzles is located, a working group and a rest group are determined in the group A nozzles and the group B nozzles, for example, electromagnetic valves are respectively arranged on an A gas path corresponding to the group A nozzles and a B gas path corresponding to the group B nozzles, and ignition and fire detection needles are respectively arranged on the group A nozzles and the group B nozzles (having both ignition and fire detection functions). And if the group A nozzles are working groups and the group B nozzles are rest groups, opening the electromagnetic valve of the group A gas path, closing the electromagnetic valve of the group B gas path, and performing ignition treatment on the group A nozzles.
In this aspect, at the time of ignition, the nozzle group having a longer accumulated operation time is selected as the active group, which logically further increases the difference in accumulated operation time between the group a nozzles and the group B nozzles. The purpose of selecting the idea is to place the core step of the balance control in the dynamic adjustment after ignition based on the stability consideration of the equipment work, so that the judgment of the working group and the rest group is simpler, and the subsequent switching frequency of the working group and the rest group is not too high.
S40: supplying air to the nozzles of the working group, performing ignition treatment at the nozzles of the working group, and stopping air supply and performing no-ignition treatment on the nozzles of the rest group; continuously monitoring the value of delta T; when | < T2Maintaining the current working group and rest group; when | DeltaT | ═ T2When the fire is in use, the working group and the rest group of the fire grate are exchanged; wherein, T2Is a preset threshold value for dynamic adjustment in the staged combustion mode.
When the combustor enters the sectional combustion mode at this time, when | [ delta ] T | < T2Maintaining the current working group and rest group; when | DeltaT | ═ T2And when the fire is in use, the combustion of the fire grate is stopped, and the working group and the rest group of the fire grate are exchanged. Wherein, T2Is a preset threshold value for dynamic adjustment in the staged combustion mode. In the split combustion mode, the nozzle group having a large cumulative operating time is selected as the operating group at the time of ignition, and therefore, | Δ T | further increases after ignition. When the absolute value of the cumulative operating time difference between the two sets of nozzles increases to T2And alternately switching the working group and the rest group, thereby achieving the effect of balancing and controlling the working frequencies of the two groups of nozzles in the dimension of accumulated running time.
In the staged combustion mode, if the working group and the rest group need to be exchanged, the combustion suspension process needs to be performed on the fire grate, that is, the air supply to both the nozzles in the group a and the nozzles in the group B is stopped, and then the exchanged working group is supplied with air and ignited according to the adjusted result. And T1Similarly, T2As a preset value, it can also be adjusted according to the requirements. In the present scheme, however, Δ T < T is not considered2And Δ T > T2The reason for (1) is that the delta T is artificially controlled to be always at (-T) by a preset mode2，T2) And (4) the following steps.
In addition, in the present embodiment, as a preferable configuration, T2＝T1. Will T2Is set to be equal to T1And the delta T can be controlled to be changed in the range of (-T1, T1) all the time, the difficulty of equipment adjustment is simplified, the running stability of the equipment is improved, and the consistency of the ignition stage and the dynamic adjustment stage on parameter setting is improved.
As shown in fig. 1, if it is judged in S10 that the fire row enters the full burn mode, air is supplied to the group a nozzles and the group B nozzles, and ignition is performed at the group a nozzles and/or the group B nozzles. In the full-range combustion mode, the group A nozzles and the group B nozzles are both working groups, so that ignition can be performed alternatively or simultaneously.
Although the group a nozzles and the group B nozzles are both working groups in the full-stage combustion mode, a difference in the length of the accumulated operating time is also caused depending on the ignition manner. Therefore, optimization can be made for the full-stage combustion mode: if the fire row is judged to enter the full-section combustion mode in S10, air is supplied to the group A nozzles and the group B nozzles, and the difference delta T of the accumulated operation time of the group A nozzles and the group B nozzles is obtained; wherein, T ═ TA-TB，TACumulative operating time for group A nozzles, TBThe accumulated running time of the B group of nozzles is obtained; determining the group of nozzles ignited in the full-range combustion mode according to the value of delta T; if Δ T ∈ [0, T1) Firing at group a nozzles and not firing at group B nozzles; if DeltaT is epsilon (-T)10), ignition is performed at the group B nozzles and no ignition is performed at the group a nozzles. Since, in the alternative ignition, it is necessary to transfer the fire to the non-ignited group of nozzles through the ignited group of nozzles, the accumulated operating time of the ignited group of nozzles is increased, where the consistency with the staged combustion mode and the dynamic adjustment stage parameter setting is maintained, so as to improve the stability of the operation of the device.
After determining the combustion mode (i.e. determining as one of the staged combustion mode and the full-staged combustion mode) and the operation route in the combustion mode (determining the working group, the rest group, and the ignition site), for example, if it is determined that the staged combustion mode is currently selected, and the group a nozzles are the working group, and the group B nozzles are the rest group, at this time, it can only be determined that the group a gas path is on and the group B gas path is off, but further adjustment needs to be made for how much combustion should be supplied to the group a gas path, so that the heat load generated by the combustor reaches the heat load requirement required by the operation when the group a nozzles are operated. As shown in fig. 1, in the present embodiment, the equalizing control method of the staged combustor may further include the steps of:
s50: and adjusting the air supply amount of the fire row until the heat load of the burner reaches the heat load requirement required by work, and enabling the burner to enter a stable combustion state. Generally, the air supply amount of the fire exhaust is regulated and controlled through a gas proportional valve.
Whether in the staged combustion mode or the full-stage combustion mode, the adjustment may be made to achieve stable combustion in accordance with S50. After the burning mode of arranging when the fire and the operation route of current burning mode are confirmed, in order to let the heat load demand that the heat load of combustor can laminate work, adjust the air feed volume of arranging the fire, promote the work efficiency and the user experience of combustor.
Further, in S50, when the combustor enters the stable combustion state and the heat load demand changes, the method proceeds to S60 to adjust the operation state of the combustor, and S60 includes:
s60 a: if the current combustion mode is a staged combustion mode and the heat load demand becomes small, two solutions are available:
s60a1, jump to S20. Returning to S20, the work group and rest group are newly selected.
S60a2, obtaining the value of Delta T when the Delta T is less than T2Maintaining the current working group and rest group; when | DeltaT | ═ T2When the fire is in use, the working group and the rest group of the fire grate are exchanged; wherein, T2Is a preset threshold value for dynamic adjustment in the staged combustion mode. Instead of returning to S20, dynamic adjustment is carried out.
S60 b: if the current combustion mode is the staged combustion mode and the heat load demand becomes large, the routine proceeds to S10.
S60 c: if the current combustion mode is the full-stage combustion mode and the heat load demand becomes small, the flow proceeds to S10.
S60 d: and if the current combustion mode is the full-section combustion mode and the heat load requirement is increased, adjusting the air supply quantity of the group A nozzles and the group B nozzles to adjust the heat load of the combustor.
According to the current combustion mode and the heat load demand change of the combustor, a processing mode matched with the current combustion mode is selected in S60a (including S60a1 and S60a2), S60b, S60c and S60 d. During the actual use of the burner, the heat load demand of the user may change, i.e. the operating heat load demand is at a value that dynamically changes according to the real-time demand, so that after the burner enters a stable combustion state, if the heat load demand changes, the operating state of the burner needs to be adjusted to match the new heat load demand.
Further, as shown in fig. 1, in the present embodiment, S00 may be further performed before each execution of S10, and S00 includes: and carrying out machine self-inspection. If the self-checking result is no fault, the operation goes to S10; and if the self-checking result is a fault, sending an alarm prompt. When the combustor works, the machine self-checking is carried out, and the reliability and the stability of the equipment work are improved.
The working principle is briefly described as follows:
firstly, judging whether the fire grate enters a sectional combustion mode or a full-section combustion mode according to the heat load requirement. When the fire grate is judged to enter a sectional combustion mode, the difference value of the accumulated running time of the group A nozzles and the group B nozzles is obtained, the working group and the rest group are adjusted according to the difference value of the accumulated running time of the two groups of spray groups, and during ignition, the group with longer accumulated running time is selected as the working group, and the group with shorter accumulated running time is selected as the rest group. After combustion, the working frequency is balanced by adopting a dynamic adjustment mode. Along with the work of the burner, the difference of the accumulated running time is increased until a critical point of switching is reached, and the working group and the rest group are exchanged, so that the working frequency of the group A nozzles and the working frequency of the group B nozzles are uniformly regulated. Correspondingly, the working frequency of the heat exchanger area corresponding to the group A nozzles and the working frequency of the heat exchanger area corresponding to the group B nozzles are subjected to balanced control, the balance of the staged combustion is improved, and the effective service life of the wall-mounted furnace is prolonged.
According to the balance control method of the sectional type combustor, the working group and the rest group of the nozzles in the sectional combustion mode are adjusted according to the difference value of the accumulated running time of the two groups of nozzles of the fire row, so that the working frequency between the two groups of nozzles is balanced, the combustion balance is improved, and the effective service life of the wall-mounted furnace is prolonged.
It should be noted that the balance control method of the sectional burner can be applied to any burner with a sectional combustion structure, and is not limited to be used on burners in wall-hanging furnaces.
In addition, the invention also provides a combustor.
The combustor is controlled by adopting the balance control method of the sectional combustor of any one embodiment. The staged combustion control method of combustion may be stored in a storage medium of a controller of the combustor.
The combustor adjusts the working group and the rest group of the nozzles in the sectional combustion mode according to the difference of the accumulated running time of the two groups of nozzles arranged in a fire row, so that the working frequency between the two groups of nozzles is balanced, the combustion balance is improved, and the effective service life of the wall-mounted furnace is prolonged.
Further, the invention also provides the wall-mounted furnace.
The wall-mounted furnace comprises the burner.
Above-mentioned hanging stove is according to the difference of the accumulative total operating time of two sets of nozzles of fire row to the work group and the rest group of the nozzle of adjustment in the sectional combustion mode, and then the operating frequency between balanced two sets of nozzles improves the equilibrium of burning, prolongs the effective life of hanging stove.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples only express preferred embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (9)

1. A method of equalization control for a segmented combustor, comprising the steps of:
s10: judging whether the fire grate enters a sectional combustion mode or a full-section combustion mode according to the heat load requirement; if the fire row is judged to enter the staged combustion mode, S20 is executed;
s20: acquiring a difference delta T of the accumulated operation time of the group A nozzles and the group B nozzles; wherein, T ═ TA-TB，TACumulative operating time for group A nozzles, TBThe accumulated running time of the B group of nozzles is obtained;
s30: determining a group of nozzles operating in a staged combustion mode based on the value of Δ T; if Δ T ∈ [0, T1) Set the group a nozzles as the working group and the group B nozzles as the rest group; if DeltaT is epsilon (-T)10), then set the B group of nozzles as the working group and the A group of nozzles as the rest group; wherein, T1Selecting boundary values for a group of preset staged combustion modes;
s40: supplying air to the nozzles of the working group, performing ignition treatment at the nozzles of the working group, and stopping air supply and performing no-ignition treatment on the nozzles of the rest group; continuously monitoring the value of delta T; when | < T2Maintaining the current working group and rest group; when | DeltaT | ═ T2When the fire is in use, the working group and the rest group of the fire grate are exchanged; wherein, T2Is a preset threshold value for dynamic adjustment in the staged combustion mode.
2. The segmented combustor of claim 1The balance control method is characterized in that T2＝T1。
3. The staged combustor equalization control method as claimed in claim 1, wherein if it is judged in S10 that the fire row enters the full-stage combustion mode, the group a nozzles and the group B nozzles are supplied with air, and ignition is performed at the group a nozzles and/or the group B nozzles.
4. The staged combustor equalization control method as claimed in claim 3, wherein if it is judged in S10 that the fire row enters the full-staged combustion mode, the nozzles of group a and the nozzles of group B are supplied with air, and the difference Δ T in the accumulated operation time of the nozzles of group a and the nozzles of group B is obtained; wherein, T ═ TA-TB，TACumulative operating time for group A nozzles, TBThe accumulated running time of the B group of nozzles is obtained; determining the group of nozzles ignited in the full-range combustion mode according to the value of delta T; if Δ T ∈ [0, T1) Firing at group a nozzles and not firing at group B nozzles; if DeltaT is epsilon (-T)10), ignition is performed at the group B nozzles and no ignition is performed at the group a nozzles.
5. The method of claim 1, further comprising the step of:
s50: and adjusting the air supply amount of the fire row until the heat load of the burner reaches the heat load requirement required by work, and enabling the burner to enter a stable combustion state.
6. The method for controlling the balance of the staged combustor as claimed in claim 5, wherein in S50, when the combustor enters the stable combustion state and the thermal load requirement changes, the method proceeds to S60 to adjust the operation state of the combustor, and S60 comprises:
s60 a: if the current combustion mode is the staged combustion mode and the heat load demand becomes smaller, jumping to S20; or, obtaining the value of the delta T when the delta T < T |)2While maintaining the current working group and restGrouping; when | DeltaT | ═ T2When the fire is in use, the working group and the rest group of the fire grate are exchanged; wherein, T2Is a dynamically adjusted critical value under a preset sectional combustion mode;
s60 b: if the current combustion mode is the staged combustion mode and the heat load demand is increased, jumping to S10;
s60 c: if the current combustion mode is the full-stage combustion mode and the heat load demand is smaller, jumping to S10;
s60 d: and if the current combustion mode is the full-section combustion mode and the heat load requirement is increased, adjusting the air supply quantity of the group A nozzles and the group B nozzles to adjust the heat load of the combustor.
7. The method of claim 1, wherein executing S00, S00 comprises, before each execution of S10: performing machine self-checking, and if the self-checking result is no fault, entering S10; and if the self-checking result is a fault, sending an alarm prompt.
8. A combustor characterized by being controlled by the equalizing control method of a segmental combustor as claimed in any one of claims 1 to 7.
9. A wall hanging stove comprising the burner of claim 8.
CN202111210914.7A 2021-10-18 2021-10-18 Balanced control method of sectional type burner, burner and wall-mounted furnace Active CN113898949B (en)

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