CN216244308U - Fire grate control system - Google Patents
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- CN216244308U CN216244308U CN202023090602.0U CN202023090602U CN216244308U CN 216244308 U CN216244308 U CN 216244308U CN 202023090602 U CN202023090602 U CN 202023090602U CN 216244308 U CN216244308 U CN 216244308U
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Abstract
The utility model discloses a grate control system, which comprises: a detection device, the detection device comprising: the fire grate moving position detection device is used for dynamically detecting the moving position of the feeding fire grate; the grate material layer detection equipment is used for detecting the grate material level; the primary air detection equipment is used for detecting the outlet pressure and the air quantity of the fan; and the control equipment is used for dynamically adjusting the position of the feeding trolley based on the detection result of the detection equipment to form closed-loop control so as to prevent material deviation. The fire grate control system provided by the utility model designs special measurement and control equipment aiming at the characteristics of a large fire grate, controls the position of the feeding trolley based on the measurement result, forms closed-loop control so as to ensure that the blanking is uniform and the material deviation can be prevented, and simultaneously designs a special combustion control subsystem to be suitable for the combustion control requirement of the large fire grate.
Description
Technical Field
The utility model relates to the field of control, in particular to a fire grate control system.
Background
The existing incinerator control systems of refuse incineration power plants are all control systems for the incinerator types below 850T. Compared with the prior 850T fire grate, the large fire grate of the domestic 1000T garbage incinerator has great change in the layout of a feeding system, the structure of the fire grate and the design of a combustion air system, so that a fire grate control system needs to be redesigned.
In a large-scale grate of a 1000T garbage incinerator, 8 rows of feeding trolleys are arranged, the width of the grate is very wide, the width of the grate greatly exceeds that of an original incinerator, and the problems of uneven discharging and large material deviation risk exist, so that special design needs to be considered in the design of a control system. In addition, in the design of a combustion air system, each fan supplies 3 air chambers simultaneously, the straight pipe section of an air pipeline is very short, and the conventional flowmeter is difficult to meet. Therefore, the control system must be specially designed from the type selection of the detecting instrument to the control scheme.
Accordingly, there is a need for a grate control system that addresses at least the above-identified problems of the prior art.
SUMMERY OF THE UTILITY MODEL
To address at least one of the above issues, according to one aspect of the present invention, a grate control system is provided, comprising: a detection device, the detection device comprising: the fire grate moving position detection device is used for dynamically detecting the moving position of the feeding fire grate; the grate material layer detection equipment is used for detecting the grate material level; the primary air detection equipment is used for detecting the outlet pressure and the air quantity of the fan; and the control equipment is used for dynamically adjusting the position of the feeding trolley based on the detection result of the detection equipment to form closed-loop control so as to prevent material deviation.
In some embodiments, the system further comprises: process data acquisition equipment for acquiring data relating to combustion production.
In some embodiments, the data relating to combustion production comprises at least one of temperature, pressure, wind flow, the level of material, and fan frequency.
In some embodiments, the system further comprises: and the automatic combustion control subsystem is used for controlling the feeding speed of the feeding grate, the running period of the grate and the distribution of combustion air based on the detection result and the data related to combustion production so as to provide stable steam load and realize full-automatic closed-loop control.
In some embodiments, the auto-combustion control subsystem comprises: the automatic combustion subsystem control cabinet is used for realizing combustion control; the fire grate hydraulic system cabinet is used for controlling a hydraulic system related to the fire grate; the primary air fan frequency conversion cabinet is used for starting, stopping and regulating and controlling the primary air fan; the secondary fan frequency conversion cabinet is used for starting, stopping and adjusting and controlling the secondary fan; and the combustor control system cabinet is used for realizing the control of the combustor.
In some embodiments, the automated combustion subsystem control cabinet is further configured to automatically calculate a combustion air demand based on the given load and the actual heat value of the waste, and to automatically adjust the distribution ratio of the primary and secondary air.
In some embodiments, the automated combustion subsystem control cabinet is further configured to automatically adjust the amount of secondary air based on a given amount of oxygen to achieve a balance of boiler outlet oxygen content by fully combusting unburned combustible gases in the flue.
In some embodiments, the automated combustion subsystem control cabinet is further configured to start the auxiliary burner when the flue gas temperature fails to meet 850 ℃/2S.
In some embodiments, the system further comprises: and the temperature probe is arranged above the fire grate and is used for measuring the temperature of the fire grate.
In some embodiments, the automated combustion subsystem control cabinet is further configured to increase an air volume of a burnout section to burn out waste on the grate when the temperature measured by the temperature probe is above a threshold.
In some embodiments, the automated combustion subsystem control cabinet is further configured to restore a normal burn-out air volume when the temperature measured by the temperature probe is below a threshold value to prevent excessive cooling of the grate.
In some embodiments, the automated combustion subsystem control cabinet is further configured to calculate a position to which the feed car needs to advance at a predetermined point in time, calculate a difference based on a comparison of the feed car's own position and the position to which advancement is needed, and adjust a feed rate control valve's opening based on the difference such that the feed car's own position coincides with the position to which advancement is needed.
In some embodiments, the automated combustion subsystem control cabinet is further configured to set a reference movement speed of the grate, and to automatically adjust an actual operating speed of the grate according to a given bed thickness and an actual bed thickness.
In some embodiments, the grate movement position detection device comprises a position sensor.
In some embodiments, the fire grate layer detection apparatus comprises a radar level gauge.
In some embodiments, the primary wind detection device comprises a multi-point matrix meter.
The fire grate control system provided by the utility model designs special measurement and control equipment aiming at the characteristics of a large fire grate, controls the position of the feeding trolley based on the measurement result, forms closed-loop control so as to ensure that the blanking is uniform and the material deviation can be prevented, and simultaneously designs a special combustion control subsystem to be suitable for the combustion control requirement of the large fire grate.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail embodiments of the present invention with reference to the attached drawings. The accompanying drawings are included to provide a further understanding of the embodiments of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model. In the drawings, like reference numbers generally represent like parts or steps.
FIG. 1 illustrates a block diagram of a grate control system according to an embodiment of the present invention;
FIG. 2 shows a schematic diagram of the load control principle of the auto-combustion control subsystem according to an embodiment of the utility model;
FIG. 3 illustrates O of an auto-combustion control subsystem according to an embodiment of the present invention2Schematic diagram of content control principle;
FIG. 4 illustrates a schematic diagram of the feed control principle of the auto-combustion control subsystem according to an embodiment of the present invention;
FIG. 5 illustrates a software architecture diagram of an auto-combustion control subsystem according to an embodiment of the present invention;
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, exemplary embodiments according to the present invention will be described in detail below with reference to the accompanying drawings. It is to be understood that the described embodiments are merely a subset of embodiments of the utility model and not all embodiments of the utility model, with the understanding that the utility model is not limited to the example embodiments described herein. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the utility model described herein without inventive step, shall fall within the scope of protection of the utility model.
The existing incinerator control systems of refuse incineration power plants are all control systems for the incinerator types below 850T. At present, the large fire grate of a domestic 1000T garbage incinerator realizes the combustion control of the large fire grate. Compared with the prior 850T fire grate, the large fire grate has the advantages that the layout of a feeding system, the structure of the fire grate and the design of a combustion air system are greatly changed, and therefore a fire grate control system needs to be redesigned.
In a large-scale grate of a 1000T garbage incinerator, the width of the incinerator reaches 15 meters, each unit of an air chamber at the bottom of the incinerator is 3, the grate is divided into 6 units, the number of feeding trolleys is 8, the width of the grate is very wide, the width of the grate greatly exceeds that of the original incinerator, certain problems of uneven discharging and large material bias risk exist, and therefore special design needs to be considered in the design of a control system. In addition, in the design of a combustion air system, each fan supplies 3 air chambers simultaneously, the straight pipe section of an air pipeline is very short, and the conventional flowmeter is difficult to meet. Therefore, in the control system, the instrumentation type selection and the control scheme are specially designed, namely, a measurement and control system is specially designed and a combustion control algorithm is specially developed.
The grate control system provided by the utility model is suitable for large grates of garbage incinerators, including but not limited to large grates of 1000T garbage incinerators.
The fire grate control system provided by the utility model designs special measurement and control equipment aiming at the characteristics of a large fire grate, controls the position of the feeding trolley based on the measurement result, forms closed-loop control so as to ensure that the blanking is uniform and the material deviation can be prevented, and simultaneously designs a special combustion control subsystem to be suitable for the combustion control requirement of the large fire grate.
Referring now to FIG. 1, a grate control system according to an embodiment of the present invention is described in detail.
As shown in fig. 1, a grate control system comprises: a detection device, the detection device comprising: the fire grate moving position detection device is used for dynamically detecting the moving position of the feeding fire grate; the grate material layer detection equipment is used for detecting the grate material level; the primary air detection equipment is used for detecting the outlet pressure and the air quantity of the fan; and the control equipment is used for dynamically adjusting the position of the feeding trolley based on the detection result of the detection equipment to form closed-loop control so as to prevent material deviation.
The fire grate control system provided by the utility model mainly has the following functions: detecting the movement position of the fire grate; detecting a grate material layer; primary wind detection of the short straight pipe section; and forming closed-loop control over the large grate based on the detected result to prevent material bias.
Specifically, the position sensor can be adopted for detecting the movement position of the fire grate, the position of the feeding fire grate is dynamically detected, and the position of the trolley is dynamically adjusted through the control of a hydraulic proportional valve forming a closed loop. In some embodiments, the grate movement position detection device comprises a position sensor. The position type sensor is arranged on the feeding trolley, the position of the feeding trolley is detected according to the position type sensor, and the control equipment controls the feeding trolley to move forwards and backwards by controlling the opening degree and the oil supply direction of the hydraulic proportional valve, so that the closed-loop control of the feeding trolley is realized.
The high-temperature hearth detection needs to design a special material layer detection device according to the structure of the hearth. Through 8 material layer detection devices designed on the front arch of the hearth, the material layer is accurately detected, the feeding trolleys are independently controlled to move, the feeding amount of each feeding trolley is controlled, and the problem of material deviation is solved. The material layer detection device detects that the thickness of the material layer and the feeding trolley form closed-loop control. In some embodiments, wherein the fire grate layer detection apparatus comprises a radar level gauge.
In some embodiments, the primary wind detection device comprises a multi-point matrix meter. Specifically, the primary air detection straight pipe section can adopt a multipoint matrix type flowmeter.
In addition, the grate control system provided by the utility model also has the following functions: a process data acquisition function; and a combustion control scheme.
In some embodiments, the system further comprises: process data acquisition equipment for acquiring data relating to combustion production.
In some embodiments, wherein the data relating to combustion production comprises at least one of temperature, pressure, wind flow, the level of material, and fan frequency. The process data refers to temperature, pressure, flow rate, etc. associated with combustion production, and is connected to the control device by a cable.
The combustion control scheme adopts the traditional multilateral control aspect, PID and logic control.
In the system design of the fire grate control system, the design of a measurement and control point is a key ring. Aiming at the detection of the material layer of the incinerator, a material level detection device is arranged on the incinerator of the unit 1 at the front arch of a hearth, and simultaneously, one feeding trolley is arranged in front of each feeding trolley, and 8 furnaces are arranged in each furnace. The material level detection aims at realizing real-time accurate detection of the material level of the incineration grate unit 1, making technical preparation for real-time accurate control of the material level and thoroughly solving the problem of large fluctuation of a material layer in the incineration process.
Aiming at primary air flow detection, a pressure sensor is arranged at the outlet of each fan, and a matrix flowmeter is arranged on a branch pipe of each air chamber.
The hardware design of the fire grate control system adopts the favorable KM series hardware, and the software development platform adopts the MACS6 series software.
The fire grate control system provided by the utility model realizes the detection of the large-scale incinerator layer, avoids the problem of material deviation, completes the design of the measurement and control system and the control system of the large-scale incinerator, and completes the design, development and field debugging of the fire grate control system.
In some embodiments, the system further comprises: and the automatic combustion control subsystem is used for controlling the feeding speed of the feeding grate, the running period of the grate and the distribution of combustion air based on the detection result and the data related to combustion production so as to provide stable steam load and realize full-automatic closed-loop control.
Specifically, the existing combustion control system is open-loop control, does not form closed-loop control with load, feeding, furnace temperature and emission, and cannot realize long-period full-automatic operation. The grate control system of the utility model increases the accurate control of the material layer and realizes the full-automatic closed-loop control.
Next, an auto-combustion control subsystem in accordance with an embodiment of the present invention is explained.
The auto-combustion control subsystem includes: the automatic combustion subsystem control cabinet is used for realizing combustion control; the fire grate hydraulic system cabinet is used for controlling a hydraulic system related to the fire grate; the primary air fan frequency conversion cabinet is used for starting, stopping and regulating and controlling the primary air fan; the secondary fan frequency conversion cabinet is used for starting, stopping and adjusting and controlling the secondary fan; and the combustor control system cabinet is used for realizing the control of the combustor.
The automatic combustion control subsystem detects the combustion state through relevant field instruments and actuating mechanisms, namely detects the combustion related state such as temperature, air volume, material layer, grate position, pressure and the like, and simultaneously realizes the direct control of a fan, a throttle and a grate.
The function requirements of the automatic combustion control subsystem take steam load as a main control target, take the heat value of garbage as a control condition, and control the feeding speed of a feeding grate of the incinerator, the running period of the incineration grate and the distribution of combustion air to realize the control aims of stable steam load, retention of the smoke temperature of 850 ℃ for more than 2 seconds, and standard reaching of the oxygen content of the smoke and the heat burning reduction rate of slag. The temperature of the hearth is taken as a main regulation target in the processes of starting and stopping the incinerator.
The automatic combustion control subsystem realizes the environmental protection target of 2 seconds of flue gas temperature staying at 850 ℃ to solve the decomposition of the dioxin, which is a toxic substance, by controlling the feeding speed of a feeding grate of the incinerator, the running period of the incineration grate, the distribution of combustion air and the heat load of the auxiliary burner in the process of refuse incineration, and has the following functions: describing the relation between the evaporation capacity and the garbage quantity and the combustion air by using a continuously adjustable characteristic curve; the effective combustion of the garbage is consistent with the steam load, and the garbage can be continuously and automatically regulated only by setting the steam load; the content of O2 in the flue gas can be effectively controlled; the start/stop of the auxiliary burner is automatically adjusted at 850 ℃/2S; the furnace temperature is stably controlled, and the generation amount of NOx is reduced; the feeding grate is synchronously controlled to realize stable feeding of the garbage; the incineration grate is coordinately controlled in multiple sections, so that the uniform distribution of the thickness of the garbage and the accurate speed control are realized; the heat ignition loss rate is effectively controlled, and slagging is prevented; and the number of operators is reduced, and the operation and the control are simplified.
Aiming at the operation mode of the automatic combustion control subsystem, an operator inputs a garbage low-grade heat value, a steam load set value, garbage density and a flue gas oxygen content set value, and the automatic combustion control subsystem automatically controls the combustion process of the incinerator-waste heat boiler by intelligently adjusting various parameters such as feeding speed of a feeding grate, movement speed of an incineration grate, an operation period of the incineration grate, air quantity control of an burnout section of the incineration grate, air distribution quantity of primary air and secondary air, starting and stopping of an auxiliary burner and the like.
The automatic combustion control subsystem automatically controls the combustion process of the incinerator-waste heat boiler according to parameters of various media such as garbage, primary air, secondary air, flue gas, boiler water supply, main steam and the like, and can realize the whole-process control from ignition to blowing out.
The control principle of the auto-combustion control subsystem according to an embodiment of the present invention is explained with reference to fig. 2 to 4.
FIG. 2 is a schematic diagram of the load control principle of the auto-combustion control subsystem according to an embodiment of the present invention.
In some embodiments, the automated combustion subsystem control cabinet is further configured to automatically calculate a combustion air demand based on the given load and the actual heat value of the waste, and to automatically adjust the distribution ratio of the primary and secondary air.
Specifically, as shown in fig. 2, the amount of the evaporation amount can be effectively controlled by increasing/decreasing the amount of the garbage feed and the amount of the combustion air. When a target evaporation amount is set, a given garbage heat value is given, the control system automatically calculates the required garbage amount, and after the load controller of the automatic combustion control subsystem is started, the system gradually adjusts the actual garbage amount according to the actual load of the boiler and calculates the actual heat value of the garbage. The automatic combustion control automatically calculates the combustion air demand according to the given load and the actual heat value of the garbage, after the load controller of the automatic combustion control subsystem is started, the automatic combustion control subsystem automatically adjusts the distribution proportion of primary air and secondary air, if the load is lower than the given load, the automatic combustion control subsystem automatically increases the distribution proportion of the primary air and adjusts the distribution of the primary air in 5 units, and the air quantity of the units 3 and 4 is increased.
FIG. 3 is O of an auto-combustion control subsystem according to an embodiment of the present invention2Schematic diagram of content control principle.
In some embodiments, the automated combustion subsystem control cabinet is further configured to automatically adjust the amount of secondary air based on a given amount of oxygen to achieve a balance of boiler outlet oxygen content by fully combusting unburned combustible gases in the flue.
Specifically, as shown in fig. 3, by increasing/decreasing the supply of the secondary air volume, the oxygen concentration in the flue gas can be adjusted to be within a set range. The oxygen controller automatically adjusts the air quantity of secondary air within a specified range according to the given oxygen quantity, and unburnt combustible gas is fully combusted in the first flue through adjustment of the secondary air quantity, so that the balance of the oxygen content at the outlet of the boiler is realized.
In some embodiments, the automated combustion subsystem control cabinet is further configured to start the auxiliary burner when the flue gas temperature fails to meet 850 ℃/2S. Specifically, the 850 ℃/2S control implementation is achieved primarily through the control of starting/stopping the supplementary burner. When the temperature of the flue gas can not meet 850 ℃/2S, starting the auxiliary burner, and when the temperature meets 850 ℃/2S, delaying a period of time to stop the auxiliary burner.
In some embodiments, the grate control system further comprises: and the temperature probe is arranged above the fire grate and is used for measuring the temperature of the fire grate.
In some embodiments, the automated combustion subsystem control cabinet is further configured to increase an air volume of a burnout section to burn out waste on the grate when the temperature measured by the temperature probe is above a threshold.
In some embodiments, the automated combustion subsystem control cabinet is further configured to restore a normal burn-out air volume when the temperature measured by the temperature probe is below a threshold value to prevent excessive cooling of the grate.
Specifically, for the control of the thermal ignition loss rate, all the garbage at the tail end of the combustion furnace is normally combusted to form a sintered beam, but some garbage is not combusted due to unstable garbage components, and the garbage falls to a fire grate of an burnout section with flame. At this time, additional air is required to be introduced to help burn out the garbage and prevent the birth slag. The automatic combustion control subsystem is provided with a temperature probe above the 5 sections of grates, when the temperature is higher than a threshold value, the air volume of the burnout section is additionally increased, and the garbage on the burnout grate is burnt out through accelerated combustion. When the temperature is lower than the threshold value, the burnout section is fully combusted, and the normal burnout air quantity is recovered, so that the grate can be prevented from being excessively cooled.
FIG. 4 is a schematic illustration of the feed control principle of the auto-combustion control subsystem according to an embodiment of the present invention.
In some embodiments, the automated combustion subsystem control cabinet is further configured to calculate a position to which the feed car needs to advance at a predetermined point in time, calculate a difference based on a comparison of the feed car's own position and the position to which advancement is needed, and adjust a feed rate control valve's opening based on the difference such that the feed car's own position coincides with the position to which advancement is needed.
Specifically, as shown in fig. 4, in the garbage feeding process, it is necessary to keep each feeding platform synchronously, slowly and smoothly pushed out, and if the feeding platforms are different from one another, the garbage may fall into the gap and block two adjacent feeding trolleys. Each feeding trolley is kept synchronous, and the garbage can be pushed into the incinerator row uniformly. The automatic combustion control subsystem designs a position synchronous controller for each feeding trolley, after the ACC system calculates the needed garbage feeding speed, the position synchronous controller starts to calculate the position to which the feeding grate trolley needs to advance for the next second, then each feeding grate trolley compares the position feedback signal with the position parameter needed to be reached, and then the opening of the feeding speed control valve is adjusted according to the difference, so that each feeding trolley keeps the position of the feeding trolley consistent with the calculated position constantly. The position synchronous controller is used for realizing the control of the movement speed of the feeding trolley, is software control logic and runs in the automatic combustion control cabinet. The unique design of the automatic combustion control subsystem enables the overall speed of the feeding grate to be accurately controllable, each platform can be independently and spontaneously finely adjusted, and when a certain feeding platform car falls behind or exceeds the overall speed, the controller can rapidly control the opening of the valve according to the speed increased or decreased by deviation.
In some embodiments, the automated combustion subsystem control cabinet is further configured to set a reference movement speed of the grate, and to automatically adjust an actual operating speed of the grate according to a given bed thickness and an actual bed thickness.
Specifically, aiming at the control of the incineration grate, the automatic combustion control subsystem automatically sets the reference movement speed of the incineration grate according to the actual garbage heat value. After the garbage is pushed into the incineration grate from the feeding grate, the ACC automatic combustion control subsystem automatically adjusts the actual operating speed of each unit of the incineration grate according to the given material layer thickness and the actual material layer thickness, and meanwhile, the uniform material distribution is ensured, the grate segments cannot be exposed in flame due to the deviated material, otherwise, the mechanical mechanism of the grate segments can be damaged. The load controller in the automatic combustion control subsystem automatically adjusts the movement time interval of the turning fire grate, and ensures the stable load of the boiler. The load controller is a main controller of the automatic combustion control cabinet, wherein software control logic runs in the main controller.
Next, a software design of an auto-combustion control subsystem according to an embodiment of the present invention is described with reference to FIG. 5.
The automatic combustion control subsystem adopts ST language and CFC language to realize the combustion control program of the incinerator. As shown in fig. 5, the combustion control program obtains real-time data by accessing IO, runs a control algorithm, and controls actuators such as a field fan and a grate. The software of the present auto-combustion control subsystem is designed in its entirety to perform the following functions: collecting IO data; standard data blocks of a motor and valve equipment; a fire grate motion control target logic block; controlling the standard block by the residence time of the garbage movement; and MFT protection.
The software development platform adopts a MACS6 series software platform, and main general functional units of the whole program are designed according to analysis of equipment and control objects in the combustion control subsystem, wherein the main general functional units comprise a switch functional block, a motor functional module, a valve functional module and a fire grate movement functional module. The general function block is independent relative to hardware, can be independently debugged and installed, and can be directly quoted for different projects.
The feeding controller and the incinerator grate controller are controlled based on a simple model controller of a model, the control of a garbage layer is realized by establishing a multivariable model of a combustion control subsystem, and the load and the oxygen amount are controlled on the basis.
The fire grate control system provided by the utility model designs special measurement and control equipment aiming at the characteristics of a large fire grate, controls the position of the feeding trolley based on the measurement result, forms closed-loop control so as to ensure that the blanking is uniform and the material deviation can be prevented, and simultaneously designs a special combustion control subsystem to be suitable for the combustion control requirement of the large fire grate.
Although the illustrative embodiments have been described herein with reference to the accompanying drawings, it is to be understood that the foregoing illustrative embodiments are merely exemplary and are not intended to limit the scope of the utility model thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the scope or spirit of the present invention. All such changes and modifications are intended to be included within the scope of the present invention as set forth in the appended claims.
In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the utility model may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Similarly, it should be appreciated that in the description of exemplary embodiments of the utility model, various features of the utility model are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the method of the present invention should not be construed to reflect the intent: that the utility model as claimed requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.
It will be understood by those skilled in the art that all of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or elements of any method or apparatus so disclosed, may be combined in any combination, except combinations where such features are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.
Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the utility model and form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.
The above description is only for the specific embodiment of the present invention or the description thereof, and the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and the changes or substitutions should be covered within the protection scope of the present invention. The protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (16)
1. A grate control system, comprising:
a detection device, the detection device comprising:
the fire grate moving position detection device is used for dynamically detecting the moving position of the feeding fire grate;
the grate material layer detection equipment is used for detecting the grate material level; and
the primary air detection equipment is used for detecting the outlet pressure and the air quantity of the fan; and
and the control equipment is used for dynamically adjusting the position of the feeding trolley based on the detection result of the detection equipment to form closed-loop control so as to prevent material deviation.
2. The system of claim 1, further comprising:
process data acquisition equipment for acquiring data relating to combustion production.
3. The system of claim 2, wherein the data related to combustion production comprises at least one of temperature, pressure, wind flow, the level, and fan frequency.
4. The system of claim 2, further comprising:
and the automatic combustion control subsystem is used for controlling the feeding speed of the feeding grate, the running period of the grate and the distribution of combustion air based on the detection result and the data related to combustion production so as to provide stable steam load and realize full-automatic closed-loop control.
5. The system of claim 4, wherein the auto-combustion control subsystem comprises:
the automatic combustion subsystem control cabinet is used for realizing combustion control;
the fire grate hydraulic system cabinet is used for controlling a hydraulic system related to the fire grate;
the primary air fan frequency conversion cabinet is used for starting, stopping and regulating and controlling the primary air fan;
the secondary fan frequency conversion cabinet is used for starting, stopping and adjusting and controlling the secondary fan; and
and the combustor control system cabinet is used for realizing the control of the combustor.
6. The system of claim 5, wherein the automated combustion subsystem control cabinet is further configured to automatically calculate a combustion air demand based on the given load and an actual heat value of the waste, and to automatically adjust the distribution ratio of the primary and secondary air.
7. The system of claim 5, wherein the automated combustion subsystem control cabinet is further configured to automatically adjust the secondary air flow rate based on a given oxygen level to achieve a balance of boiler outlet oxygen levels by substantially combusting unburned combustible gases in the flue.
8. The system of claim 5, wherein the automated combustion subsystem control cabinet is further configured to start an auxiliary burner when a flue gas temperature fails to meet 850 ℃/2S.
9. The system of claim 5, further comprising:
and the temperature probe is arranged above the fire grate and is used for measuring the temperature of the fire grate.
10. The system of claim 9, wherein the automated combustion subsystem control cabinet is further configured to increase an air volume of a burnout section to burn out waste on the grate when the temperature measured by the temperature probe is above a threshold.
11. The system of claim 9, wherein the automated combustion subsystem control cabinet is further configured to restore normal burn-out air flow to prevent excessive cooling of the grate when the temperature measured by the temperature probe is below a threshold.
12. The system of claim 5, wherein the automated combustion subsystem control cabinet is further configured to calculate a position to which the feed car needs to advance at a predetermined point in time, calculate a difference based on a comparison of the feed car's own position and the position to which advancement is needed, and adjust a feed rate control valve's opening based on the difference such that the feed car's own position coincides with the position to which advancement is needed.
13. The system of claim 5, wherein the automated combustion subsystem control cabinet is further configured to set a reference movement speed of the grate, and to automatically adjust an actual operating speed of the grate based on a given bed thickness and an actual bed thickness.
14. The system of claim 1, wherein the grate movement position detection device comprises a position sensor.
15. The system of claim 1, wherein the fire grate layer detection device comprises a radar level gauge.
16. The system of claim 1, wherein the primary wind detection device comprises a multi-point matrix meter.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115899715A (en) * | 2022-09-27 | 2023-04-04 | 江门市华杰固体废物处理有限公司 | Multi-stage furnace, pyrolysis carbonization sludge treatment system and treatment process |
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2020
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115899715A (en) * | 2022-09-27 | 2023-04-04 | 江门市华杰固体废物处理有限公司 | Multi-stage furnace, pyrolysis carbonization sludge treatment system and treatment process |
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