JPS57204419A - Flow rate measuring system of coal mill pulverized coal - Google Patents

Flow rate measuring system of coal mill pulverized coal

Info

Publication number
JPS57204419A
JPS57204419A JP8961781A JP8961781A JPS57204419A JP S57204419 A JPS57204419 A JP S57204419A JP 8961781 A JP8961781 A JP 8961781A JP 8961781 A JP8961781 A JP 8961781A JP S57204419 A JPS57204419 A JP S57204419A
Authority
JP
Japan
Prior art keywords
signal
coal
mill
differential pressure
pulverized coal
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.)
Pending
Application number
JP8961781A
Other languages
Japanese (ja)
Inventor
Tadashi Komada
Sadao Yanagida
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP8961781A priority Critical patent/JPS57204419A/en
Publication of JPS57204419A publication Critical patent/JPS57204419A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
    • G01F1/34—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Volume Flow (AREA)

Abstract

PURPOSE:To execute a measurement without delay, and to elevate its controllability, by providing a switching relay so that a signal converted from mill differential pressure can be used as a pulverized coal signal when a mill is started and stopped. CONSTITUTION:This system is consituted so that the first signal which has added an element of time lag of first order to a coal feeder coal quantity detection value of a coaling machine, and the second signal which has converted a mill differential pressure value to a function are generated, the first signal is selected at the time of a regular operation, also the second signal is selected when starting and stopping a mill,and its selected signal becomes a pulverized coal signal. For instance, a coal feeder coal quantity transmitter 22 is connected to a device of time lag of first order 101, a mill differential pressure transmitter 20 is connected to a function generator 104, and both of them are selected by a switching relay 103. When starting and stopping the mill, the switching relay 103 is driven and switched to the side of the function generator 104, by a signal monitor relay 105, and a signal monitor relay 102 and an OR circuit 106, respectively.
JP8961781A 1981-06-12 1981-06-12 Flow rate measuring system of coal mill pulverized coal Pending JPS57204419A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8961781A JPS57204419A (en) 1981-06-12 1981-06-12 Flow rate measuring system of coal mill pulverized coal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8961781A JPS57204419A (en) 1981-06-12 1981-06-12 Flow rate measuring system of coal mill pulverized coal

Publications (1)

Publication Number Publication Date
JPS57204419A true JPS57204419A (en) 1982-12-15

Family

ID=13975705

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8961781A Pending JPS57204419A (en) 1981-06-12 1981-06-12 Flow rate measuring system of coal mill pulverized coal

Country Status (1)

Country Link
JP (1) JPS57204419A (en)

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