EP2522905A2 - Procédé et dispositif d'actionnement d'un dispositif de convoyage pour des cendres - Google Patents

Procédé et dispositif d'actionnement d'un dispositif de convoyage pour des cendres Download PDF

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Publication number
EP2522905A2
EP2522905A2 EP12164339A EP12164339A EP2522905A2 EP 2522905 A2 EP2522905 A2 EP 2522905A2 EP 12164339 A EP12164339 A EP 12164339A EP 12164339 A EP12164339 A EP 12164339A EP 2522905 A2 EP2522905 A2 EP 2522905A2
Authority
EP
European Patent Office
Prior art keywords
product
transport
conveyor
combustion
control unit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP12164339A
Other languages
German (de)
English (en)
Other versions
EP2522905A3 (fr
Inventor
Rafael Moreno Rueda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Clyde Bergemann DRYCON GmbH
Original Assignee
Clyde Bergemann DRYCON GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Clyde Bergemann DRYCON GmbH filed Critical Clyde Bergemann DRYCON GmbH
Publication of EP2522905A2 publication Critical patent/EP2522905A2/fr
Publication of EP2522905A3 publication Critical patent/EP2522905A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J1/00—Removing ash, clinker, or slag from combustion chambers
    • F23J1/06—Mechanically-operated devices, e.g. clinker pushers
    • 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
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2900/00—Special arrangements for conducting or purifying combustion fumes; Treatment of fumes or ashes
    • F23J2900/01002—Cooling of ashes from the combustion chamber by indirect heat exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2900/00—Special arrangements for conducting or purifying combustion fumes; Treatment of fumes or ashes
    • F23J2900/01009—Controls related to ash or slag extraction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2221/00—Pretreatment or prehandling
    • F23N2221/10—Analysing fuel properties, e.g. density, calorific

Definitions

  • the present invention relates to a method for operating a conveyor and a conveyor for a consumable product. Furthermore, it comprises a method for operating a combustion plant and an incinerator.
  • Burn-off products are usually to be continued from a combustion plant and fed to a subsequent process or a collection container.
  • the conveyor is usually upstream of the combustion device, which can be set up for different purposes.
  • the present invention relates to larger combustion facilities and large-scale facilities that are used to eliminate pollutants and / or energy.
  • the resulting burn-off products can therefore have very different properties.
  • the main focus here is on burn-off products that are solid or at least have a high viscosity.
  • the combustion processes here often have in common that the combustion products occur irregularly in time and / or qualitatively inhomogeneous, so that a homogenization of the Abbrand GmbHstroms is desired for subsequent processes.
  • the present invention is based on the object, at least partially overcome the known from the prior art disadvantages.
  • a method and a conveyor should be specified, with which the Abbrand Coolstrom is always adapted to the requirements of subsequent processes.
  • burnup products can be of any nature, which are characterized in particular by being the by-products of a solid-state combustion process. she can therefore z. B. fine-grained and / or dry as ash, baked and / or moist as slag and / or in a mixed form.
  • the conveyor may be any apparatus which is capable of being temporarily in contact with such hot burn-off products, the burn-off product being e.g. B. (after the task) a temperature in the range of 20 ° C to 800 ° C, in the task after the combustion process, especially at a temperature above 500 ° C, and transported by the conveyor, for example, over a period of 20 to 500 seconds becomes.
  • step a) the burned product is transported horizontally.
  • the burn-off product is in particular on a means of transport (tape, containers, blades, underbody).
  • the burn-up product in this phase can either be transported substantially calmly lying on a moving means of transport and / or be moved with lying contact over a slowly moved and / or stationary subfloor.
  • This step is carried out in particular to transport the burned product from a hotter area to a cooler area.
  • step b the burn-off product (essentially only) moves in a substantially vertical direction following gravity.
  • the combustion product can fall freely and unguided or in a chute, which may sometimes be inclined in places or over the entire length, a certain catchment area.
  • the combustion product in particular in a chute, and preferably by means of obstructing means, can be hindered in its free fall.
  • the steps of the horizontal and the falling transport can be followed by each other (directly). In other words, this also means that step b) follows step a) directly below.
  • Such a configuration is to be provided, in particular, if the burn-off products are already fine-grained at the end of step a), for example with a maximum extent (Diameter) of about 250 millimeters, in particular of a maximum of about 100 millimeters.
  • microwaves While the burn-off product falls, it is particularly easy to detect by microwaves.
  • the microwaves are suitable for partially penetrating the burn-up product as well as being partially reflected and / or absorbed, so that physical properties of the burn-up product can be detected from the (remaining) microwave radiation arriving at a receiver.
  • a microwave sensor (which emits single and microwave waves) preferably evaluates the proportion of microwaves reflected by the consumable product per unit of time.
  • the detected property is transmitted to the control unit (step d)).
  • the measurement result may well be prepared so far that it is directly readable as a record.
  • the measurement results can also, z. B. based on electronic signals, only in the control unit in data on the properties of the consumable product can be implemented.
  • These self-processed data or data already transmitted by the microwave sensor can be evaluated by the control unit in the subsequent step (step e)).
  • On the basis of the evaluation of the microwave radiation at least one (physical) property of the conveyed burn-up product can be detected.
  • reference experiments can be completed and evaluated in advance, which allow an assignment of the current microwave radiation to a corresponding property.
  • microwave radiation in addition to the evaluation of the microwave radiation, further environmental parameters (microwave dispersion, temperature, etc. And / or known properties of the consumable product (material, temperature,%) are included here.
  • the evaluation includes both the comparison with desired limit values and the comparison with requirements, in particular with reference to the conveyor and / or with respect to process variables that are required in upstream and / or downstream processes.
  • step f one or more transport parameters can be correspondingly controlled.
  • a control loop for the conveying operation is set up as a function of the measurement results, so that the conveying operation is adapted (automatically) according to corresponding specifications.
  • This method is preferably performed in real time. As a result, a particularly fine adaptation of the properties of the consumable product is achieved, in particular for subsequent processes.
  • a particular advantage of this method is that the conveyor can be protected from excessive heat and at the same time the desired physical properties can be processed for subsequent processes.
  • the burn-up product is comminuted in the region of a transition from the horizontal transport to the falling transport.
  • crushing in this area not only a homogenization of the consumed product in its size, but also in its distribution in the subsequent measuring section or in the measuring range (in a chute) can be effected. Therefore, such a shredder can be used as a distributor in a burn-off product, which is already present in a sufficiently small grain size.
  • the preferred aim of comminution is therefore not only a uniform grain size of the consumable product, but also an improved detection of the physical properties by the microwaves.
  • the stated (physical) properties can be determined both by the evaluation of the microwave radiation and in combination with measurements in other areas and / or by other sensors. If a volume flow is detected, then z. B. statements about the amount and density of the consumable product possible. From this it is also possible to evaluate conclusions about the quality of combustion and / or the temperature profile of the combustion product in the conveyor. This can also be achieved in accordance with the detection of a mass flow. When measuring the mass flow, the added quality can also be evaluated for subsequent processes. By detecting the moisture in the combustion product and / or the ambient air, it is likewise possible to determine a quality for subsequent processes and / or also of the upstream combustion process. By temperature, the transport process, the composition of the consumed product and / or a cooling process can be evaluated. By determining the grain size of the burn-up product, it is not only possible to evaluate the size reduction, but also to evaluate the quality and type of burn-up product.
  • both the temperature and the temperature profile of the combustion product can be changed and the amount of burned product can be changed.
  • an advantageous adaptation of the combustion product quality and the amount of combustion product to subsequent processes, preferably in real time can be prepared.
  • By adjusting the cooling of the burned product can turn the Temperature behavior of Abbrandbaums be changed, but not the speed of lying transporting must be changed.
  • the adaptation to the best possible cooling controllable is not only to control the amount of cooling, but also in several types of cooling options. This can z. B.
  • the supply of burned products from the upstream combustion process can be controlled, whereby a reduced or increased loading of the conveyor can be achieved.
  • z. B. also the heat input into the conveyor can be reduced.
  • the degree of comminution depends on a variety of conditions, which can be set as the previous parameters in the interaction of the parameters. In particular, the degree of comminution is important for subsequent processes.
  • boilers can be suitable for any type of combustion. Any kind of process-related burns can be controlled at least via the process variables mentioned above.
  • the amount of combustion air supplied and / or quality and composition is adjustable.
  • About the amount of fuel is also the Process of combustion significantly influenced.
  • the temperature of the combustion is a very direct quality feature of the combustion, but does not represent a direct control variable, and is set in particular on the other mentioned process variables.
  • the discharge quantity of combustion product not only has a multifaceted influence on the combustion process per se, but also on the subsequent production process and / or the quality and composition of the combustion product itself. It is therefore particularly advantageous to start the combustion process in the combustion vessel on the basis of the measured data Adjust and regulate microwave measurement in the area of falling transport.
  • the means of transport with drive can be a means of transport, with which a combustion product can be conveyed horizontally, wherein a (transport) speed can be set via the (at least one) drive.
  • a (transport) speed can be set via the (at least one) drive.
  • the combustion product of gravity follows to a subsequent process or collection container.
  • This chute may also be provided with fall rate delay means (grid, diverter, throat, etc.) that affect a falling rate of the burned product.
  • At least one measuring means is provided for detecting one or more (physical) properties of the burned product, which, with the aid of microwaves, enables, in particular, fast detection which can be used for real-time control.
  • a plurality of measuring means are arranged in the chute, wherein these are in particular in a (horizontal) plane perpendicular to the chute (possibly evenly distributed over the circumference) positioned.
  • the use of three (3) microwave sensors is particularly preferred.
  • the used plurality of measuring means / microwave sensors can also be designed or operated differently. For example, different frequency bands can be used with the measuring equipment / microwave sensors for the measurement.
  • a suitable microwave sensor may be arranged, for example, in a metallic conduit of the chute. By coupling the microwave, a measuring field is generated together with the metallic piping. The introduced by the microwave sensor microwave is reflected by the particles of Abbrand areas and then received again. The received signals can also be evaluated in terms of their frequency and amplitude, so that the microwave sensor operates in the manner of a counter. By means of the selectively oriented to a predetermined frequency evaluation ensures that actually only moving burned products are measured.
  • control unit which receives the measurement signals and / or measurement data from the measuring means, the detected and transmitted properties are evaluated, as z. B. has been previously described in the process. Based on this and possibly starting from further control variables, the control unit is set up to control the conveyor. For this purpose, in particular the corresponding data lines and / or control lines are provided which allow a corresponding communication of the components. In particular, by means of such a conveyor, a regulation of the transport of burned product can be carried out in real time.
  • a crusher is arranged between the transport means and the chute.
  • a shredder is particularly suitable for ensuring homogenization of the grain size of the burn-up product.
  • a homogenization with the grain distribution in the subsequent chute section can be achieved.
  • a crusher can be made by a variety of crushing agents. For example, this can be achieved by interlocking gears, gears or obstacles in the chute.
  • a jaw crusher in which the combustion product is comminuted in the wedge-shaped shaft between a fixed crushing jaw and an eccentric shaft
  • a roller crusher and / or a mill eg for coal
  • the conveyor further comprises a cooling device which cools the burn-up product at least in the region of the transport means and which can be regulated by the control unit is.
  • the cooling device consists of at least one flap and / or at least one valve between the environment and the (encapsulated or integrated into a housing) transport area through which z. B. with overpressure (by fans, for example) and / or as a result of a pressure prevailing in the transport vacuum to the Abbrand thereof during travel in the transport area (preferably in countercurrent) cooling air is supplied.
  • overpressure by fans, for example
  • cooling air or other cooling fluids controlled by other cooling processes may be added.
  • the controllability of the cooling device is thus also to be seen in the fact that, under a selection of different cooling devices or cooling device components, the appropriate selection of cooling agents is made on the basis of the evaluation in the control unit, and / or the intensity of the cooling is adapted by the respective controlled cooling device. So z. As the cooling can be increased if at least one of the following properties increases: volume flow, mass flow, moisture, temperature, grain.
  • the transport is a trough chain conveyor or conveyor belt and controlled by the control unit.
  • This is a wet conveyor or particularly preferably a so-called dry conveyor, in which therefore the burned product is transported without immersion in a hot water bath.
  • a trough chain conveyor interconnected troughs, partitions or the like are formed, in which the burned product is transported.
  • the conveyor belt is z. B. to plates, which are lined up together driven together, the burned product is placed on it.
  • the troughs, plates, etc. of the two transport can be moved with chain drives or the like.
  • a trough chain conveyor and / or conveyor and processing means may be provided which cause a treatment of the consumable product for the subsequent use of the consumable product.
  • As fins and tips in the surface of the Trough chains or the conveyor belt may be provided, which lead to a shredding and more uniform distribution of the burned product.
  • scraper devices can be attached, which cause a cleaning of attachments in the area of the trough chain conveyor or conveyor belt.
  • a combustion plant which comprises the conveyor according to the invention and further comprising a combustion boiler, wherein the control unit is adapted to control a resource of the combustion vessel.
  • the type of combustion boiler has already been described in connection with the method for operating an incinerator. Such a combustion plant is particularly suitable for this method.
  • the resources of the fuel boiler include the supply of fuel and combustion air and control means for draining Abbrand arean and exhaust gases.
  • the control unit can continue to be supplied with measured variables from the combustion boiler, whereby the control unit is in turn able to make also due to its control measures on the conveyor.
  • the features according to the invention can be realized in accordance with the methods corresponding to the devices according to the invention. Therefore, the devices are particularly suitable and arranged to perform the procedures.
  • the processes and method steps described in connection with the device according to the invention can also be integrated into the method according to the invention (also independent of the specific design of the apparatus or device components). This applies, for example, to the cooling processes and the regulation of cooling.
  • the method and the device for operating a conveyor for a consumable product are preferably characterized in that during conveyance by detecting and evaluating properties (such as volume flow, mass flow, humidity, temperature, grain) of the consumable product by means of microwaves control of transport parameters (such as transport speed , Cooling of the burned product, supply of burned product, degree of comminution) takes place. It is possible to protect the conveyor thermally and mechanically and at the same time to ensure a real-time control of the composition and amount of Abbrandterrorisms for subsequent processing steps.
  • properties such as volume flow, mass flow, humidity, temperature, grain
  • transport parameters such as transport speed , Cooling of the burned product, supply of burned product, degree of comminution
  • the invention has in particular the promotion of burned products in focus, but of course other materials can be transported accordingly.
  • the invention can also be used in the promotion of, for example, (hot) bulk materials, (wet) mud, etc. as well.
  • the "burn-off product” can also be regarded as a synonym for these materials for this description of the invention.
  • a conveyor 1 is shown in principle.
  • On the transport means 9 are burned products 2, which are shown here by way of example as slag-shaped fused.
  • a chute 11 in which the combustion product 2 coming from the means of transport 9 enters via obstacles, physical properties are absorbed by microwaves 3.
  • the measuring means 12, which is both transmitter and receiver of microwaves 3 in this example, transmits measuring signals z. B. in already processed data form via the measuring line 18 to the control unit 4.
  • the received data or measurement signals are evaluated.
  • an adapted signal is delivered to the drive 10 (which can also be arranged at another location or at the other end of the transport means 9), via which the speed of the transport means 9 is controlled in this example.
  • FIG. 2 shows the burnoff product feed 15 which is controlled via burnoff product metering means 16.
  • the burnup product metering means 16 is not driven via the control unit 4; but that would be possible. Since it makes sense for many technical applications that the combustion product 2 is guided in a region of low negative pressure, in this example the transport region 5 is limited by conversions which are indicated by lines.
  • a process flow is shown as it z. B. with the conveyor 1, as shown in Fig. 1 is shown, can be executed.
  • the order of steps a) and b) is selected only because existing systems have such an order often already exists and often makes sense for other technical reasons.
  • the step f) also has an influence on the step b), provided that in step b) suitable means of transport are provided, the z. B. can affect a transport speed, such. B. moving obstacles or an air counterflow.
  • the sequence of steps c) to f) is often to be so set. Thus, if necessary, repetitions of the individual steps could be carried out before the next step takes place.
  • step a) in another configuration of the conveyor 1 than in Fig. 1 shown does not necessarily have to be performed to perform step b).
  • step c) may be carried out without performing step b) in the sense that it states that at the moment there is no burned product, with reference to FIG Fig. 1 , in the chute 11 is present.
  • Fig. 3 shows an example of an incinerator 6, in which at the top of a combustion boiler 7 is provided with a grate 26, in which a fuel 25 is burned together with supplied combustion air 8. Subsequently, the consumable product 2 is applied to the transport means 9 through the grate 26 (and / or an output shaft).
  • the transport means 9 of the conveyor 1 is inclined in this case in a further portion upwards, whereby a height is overcome in order to obtain a sufficient height of the chute 11, and further to obtain a redistribution of the burned products 2 in the inclined region.
  • a crusher 13 is interposed, in which the burned products 2 are comminuted into uniform grains and a homogenization of the grain distribution is achieved.
  • the burnout product 2 leaving the shredder 13 is taken from microwaves 3, starting from the measuring means 12 as in FIG Fig. 1 detected.
  • the measuring means 12 is shown only schematically and therefore be composed of several individual sensors can, for. B. can be distributed over the circumference of the chute 11.
  • the data of the control unit 4 are made available via the measuring line 18, in which, as a result of the evaluation via the drive control line 17, the drive 10 of the transport means 9, the supply of cooling air 19 is controlled by the control of the cooling device 14 and the comminutor 13 via the comminution control line 24 , Even if in this Fig. 3 the drive 10 is shown on the left, it will usually be arranged right at the end of the transport means 9, so that this pulls directly the heavy upper strand.
  • two temperature sensors are provided here, namely the transport region temperature sensor 20 in the transport region 5, which is connected to the control unit 4 via the T T measurement line 21 and the fuel temperature sensor 22, which is provided here in the combustion vessel 7 by way of example above the fuel 25 and via the T.
  • B -Mess effet 23 is connected to the control unit 4.
  • Fig. 4 the sequence of a method is shown, as he, for example, with an incinerator 6 after Fig. 3 is executable.
  • the step a) also represents a measured variable for the step f).
  • step g) has direct influence on step a).
  • a further control unit can be interposed or the method can be performed via step e) or f).

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Incineration Of Waste (AREA)
  • Disintegrating Or Milling (AREA)
  • Portable Nailing Machines And Staplers (AREA)
EP12164339.9A 2011-05-13 2012-04-16 Procédé et dispositif d'actionnement d'un dispositif de convoyage pour des cendres Withdrawn EP2522905A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102011101390A DE102011101390A1 (de) 2011-05-13 2011-05-13 Verfahren und Vorrichtung zum Betreiben einer Fördereinrichtung für ein Abbrandprodukt

Publications (2)

Publication Number Publication Date
EP2522905A2 true EP2522905A2 (fr) 2012-11-14
EP2522905A3 EP2522905A3 (fr) 2014-11-19

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EP12164339.9A Withdrawn EP2522905A3 (fr) 2011-05-13 2012-04-16 Procédé et dispositif d'actionnement d'un dispositif de convoyage pour des cendres

Country Status (4)

Country Link
US (1) US20120288804A1 (fr)
EP (1) EP2522905A3 (fr)
CN (1) CN102777918A (fr)
DE (1) DE102011101390A1 (fr)

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DE102008052085B4 (de) * 2008-10-17 2020-06-18 Clyde Bergemann Dryc0N Gmbh Anlage mit einer Fördereinrichtung für Verbrennungskessel
JP6586359B2 (ja) * 2015-12-07 2019-10-02 川崎重工業株式会社 灰排出システム
CN108167837A (zh) * 2018-01-05 2018-06-15 无锡雪浪环境科技股份有限公司 半水浴式捞渣机
CN110146402B (zh) * 2018-02-12 2022-02-18 中冶长天国际工程有限责任公司 烧结燃料水分和粒度组成的智能检测系统及其控制方法
CN109665257A (zh) * 2018-12-24 2019-04-23 华润电力唐山丰润有限公司 高温渣料输送检测保护装置和检测保护系统
CN110006487B (zh) * 2019-04-02 2021-02-09 南京华电节能环保设备有限公司 一种高温熔渣回收发电用检测装置及方法
CN117190216B (zh) * 2023-11-07 2024-03-01 华能山东发电有限公司烟台发电厂 一种干式除渣系统

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Publication number Publication date
US20120288804A1 (en) 2012-11-15
DE102011101390A1 (de) 2012-11-15
CN102777918A (zh) 2012-11-14
EP2522905A3 (fr) 2014-11-19

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