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Hitachi coal pulverizer mill

22.10.2019

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Method for controlling crusher operation, installation for mineral material processing and control system. Japan: N. The control device of a coal pulverizer according to claim 1wherein the detection data input to the main operation circuit is a power generator output command value and a main steam pressure deviation or a main steam temperature deviation, and the command signal associated with the coal feed rate is a coal feed rate command value. The function generator 22 of the additional control unit 20 is a function which gives a targeted mill coal output pattern The mill furnace differential pressure 31 is a pressure loss of a solid-gas mixed fluid, and it is possible to obtain an approximate value of the coal output using the following Expression 1 by the mill furnace differential pressure along with the air flow rate Although it is possible to apply this fifth embodiment to the above-described first to fourth embodiments, a case where the fifth embodiment is applied to the first embodiment will be shown as an example. The control device of a coal pulverizer according to claim 1wherein the detection data input to the main operation circuit is a coal feed rate command value and a coal pulverizer current value, and the command signal associated with the coal feed rate is a rotation frequency command value of the coal pulverizer. The control device of a coal pulverizer according to claim 1wherein the coal output estimation unit is configured to calculate a coal output estimate based on a mill furnace differential pressure and a flow rate of pulverized coal carrying air. The control device includes a main operation circuit which calculates a command signal associated with a coal feed rate on the basis of detection data from a boiler or a power generator connected to the boiler, and an additional control unit which calculates the deviation between a standard coal output pattern preset in the coal pulverizer, and a current coal output pattern, and is adapted to add a calculation result by the additional control unit to the main operation circuit as a correction signal.

  • Pulverizers / Mills
  • USB2 Control device of coal pulverizer Google Patents

  • Pulverizers (coal pulverizer) are used to pulverize pieces of coal into fine particles MHI group offers a full line-up of pulverizer / mill systems from small to high capacity.

    For more information: MITSUBISHI HITACHI POWER SYSTEMS, LTD. Information about Pulverizers from Mitsubishi Hitachi Power Systems. A pulverizer (coal pulverizer) is installed for this purpose, and pulverizes pieces of coal.

    In order to meet coal variations and to optimize combustion, mills mills offer outstanding pulverization and.
    A control device of a coal pulverizer which pulverizes coal by the coal pulverizer and estimates coal output by which the pulverized coal is output to a boiler, the control device comprising: a main operation circuit configured to calculate a command signal associated with a coal feed rate on the basis of detection data from a boiler or a power generator connected to the boiler; and.

    In this case, since the MRS rotation frequency is one of the factors which change the mill coal output, the command signal associated with the coal feed rate can be simply obtained by operation by using this rotation frequency. Coal is supplied to the top face of the rotary table 4 from the coal supply means 3and is sandwiched, crushed, and pulverized between the rotary table 4 and the rollers 5 on this top face. Sponsoring Organization:. Full Record Journal Article:.

    images hitachi coal pulverizer mill
    Jasar ahmedovski 2015 uzivo prenosi
    On the basis of a mill coal output command calculated here, the control signal of a mill is calculated by a control device shown in FIG.

    WOA1 en. The Notice of Acceptance effective Nov.

    images hitachi coal pulverizer mill

    Announcement Date:. Second, the detection data input to the main operation circuit is a coal feed rate command value and a coal pulverizer current value, and the command signal associated with the coal feed rate is a rotation frequency command value of the coal pulverizer.

    Since the control device of the coal pulverizer of the invention is able to estimate the delivery rate of a fine powder fuel with a precision suited for a purpose, is able to perform stable control, and is able to be applied to various kinds of solid fuels, it is possible to suitably use the control device for a coal burning boiler, etc.

    Video: Hitachi coal pulverizer mill How Vertical Grinding Mills Work (Coal Pulverizer Example)

    As a method of optimizing the operation of such a boiler, for example, Patent Document 1 Japanese Patent No.

    In order to reduce the number of coal pulverizers in use at power stations, Babcock-Hitachi manufactures ball race mills with coal pulverizing.

    Reliable coal pulverizer performance is essential for sustained full-load operation of today's power plants. An effective pulverizer must be capable of handling a.

    Pulverizers / Mills

    Hitachi Power Europe GmbH HPE know-how for a wide range of coal qualities. 3.

    Video: Hitachi coal pulverizer mill Loesche Grinding Plant for Solid Fuels

    0. 30 Pulverizers. Coal Lignite Mill with Classifier, N- / NV-type.
    In this case, since the MRS rotation frequency is one of the factors which change the mill coal output, the command signal associated with the coal feed rate can be simply obtained by operation by using this rotation frequency. Second, the detection data input to the main operation circuit is a coal feed rate command value and a coal pulverizer current value, and the command signal associated with the coal feed rate is a rotation frequency command value of the coal pulverizer.

    First, the detection data input to the main operation circuit is a power generator output command value and a main steam pressure deviation or a main steam temperature deviation, and the command signal associated with the coal feed rate is a coal feed rate command value. Since the coal output is delayed behind the coal feed rate during a mill change, neither coincide with each other. JPB2 en.

    GBA en.

    Accordingly, the object of the invention is to provide a control device of a coal pulverizer which enables estimation of a coal output with a precision suited for a purpose in view of the problems of the above conventional technique.

    images hitachi coal pulverizer mill
    Araucania chile noticias hoy
    Full Record Journal Article:.

    In FIG. In this second embodiment, the MRS rotation frequency of the coal pulverizer is used as a command signal associated with the coal feed rate. In this case, since the MRS rotation frequency is one of the factors which change the mill coal output, the command signal associated with the coal feed rate can be simply obtained by operation by using this rotation frequency.

    USB2 Control device of coal pulverizer Google Patents

    Method for controlling coal feed of multi-stage coal supplier in a fluidized boiler of thermal power plant. TWA en. The control device of a coal pulverizer according to claim 1wherein the detection data input to the main operation circuit is a coal feed rate command value and a coal pulverizer current value, and the command signal associated with the coal feed rate is a rotation frequency command value of the coal pulverizer.

    images hitachi coal pulverizer mill

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    1. The control device includes a main operation circuit which calculates a command signal associated with a coal feed rate on the basis of detection data from a boiler or a power generator connected to the boiler, and an additional control unit which calculates the deviation between a standard coal output pattern preset in the coal pulverizer, and a current coal output pattern, and is adapted to add a calculation result by the additional control unit to the main operation circuit as a correction signal. In the case of coal which is hard to be pulverized, becomes greater than the standard mill current.