JPS57204419A - Flow rate measuring system of coal mill pulverized coal - Google Patents
Flow rate measuring system of coal mill pulverized coalInfo
- 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
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.
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) |
-
1981
- 1981-06-12 JP JP8961781A patent/JPS57204419A/en active Pending
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