Frequency conversion control device suitable for evaporation of alkali liquor
A frequency conversion control, lye technology, applied in non-electric variable control, evaporator accessories, control/regulation systems, etc., can solve the problems of corrosion and damage of gaskets, valve core and valve seat corrosion, and inaccurate adjustment parameters.
Pending Publication Date: 2018-04-20
江苏迈克化工机械有限公司
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Problems solved by technology
[0003] During the process of the regulating valve controlling the flow of alkali in the alkali evaporation device and the liquid level of the separator, the liquid level regulating valve 17 and the flow regulating valve 18 are in direct contact with the lye. After running for a period of time, the liquid level regulating valve 17 and the flow regulating valve 18 Corrosion and wear will occur on the spool and seat of the valve, resulting in inaccurate adjusted parameters and unstable operation of the alkali evaporation device; moreover, the sealing gaskets of the liquid level regulating valve 17 and the flow regulating valve 18 will also be corroded and damaged, and the liquid Position regulating valve 17 and flow regulating valve 18 will cause caustic leakage, which seriously pollutes the environment
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[0011] The raw solution alkali in the raw solution alkali tank 19 flows into the raw solution alkali pump 21 through the inlet pipe-20, and enters the heater 23 through the outlet pipe-22 after being pressurized by the raw solution alkali pump 21, and the heating steam passes through the heating steam pipe 24 at the same time. Enter the shell side of the heater 23 and indirectly heat the lye in the tube side of the heater 23 to make it warm up, reach the boiling point, and evaporate. Enter separator 27 and carry out vapor-liquid separation, concentrated lye flows out from separator 27 bottoms and enters concentrated lye pump 29 through inlet pipe 2 28, is sent through outlet pipe 2 30 and concentrated lye flow meter 31 after being pressurized by concentrated lye pump 29 To the next process, the secondary steam flows out from the upper part of the separator 27 through the secondary steam pipe 32 to the next process.
[0012] The concentrated lye flow measured by the concentrate...
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The invention provides a frequency conversion control device suitable for evaporation of alkali liquor, belongs to the field of chemical production, and can avoid unstable operation of a device due toalkali corrosion. An original liquid alkali tank is connected with an original liquid alkali pump through a first inlet pipe; the original liquid alkali pump is connected with a liquid level regulation frequency conversion motor; the top end of a heater is connected with the original liquid alkali pump through a first outlet pipe, and the bottom end of the heater is connected with a separator through a connecting pipe; the separator is connected to a liquid level meter, the top end of the separator is connected to a secondary steam pipe, and the bottom end of the separator is connected with aconcentrated alkali pump through an inlet pipe; the other side of the concentrated alkali pump is connected with a concentrated alkali liquid flow meter through a second outlet pipe; the concentratedalkali pump is connected with a flow regulation frequency conversion motor; a liquid level control interlocking wire is arranged between the liquid level meter and the liquid level regulation frequency conversion motor; a flow control interlocking wire is arranged between the concentrated alkali liquid flow meter and the flow regulation frequency conversion motor.
Description
technical field [0001] The invention belongs to the field of chemical production, in particular to a frequency conversion control device suitable for lye evaporation. Background technique [0002] During the alkali evaporation process of the chlor-alkali process, the flow rate of the alkali and the liquid level of the separator need to be automatically controlled within the range of the process index to ensure the normal operation of the alkali evaporation device. At present, regulating valves are used in the chlor-alkali industry to realize automatic control of the alkali flow and separator liquid level in the alkali evaporation device, such as figure 1 Shown is a schematic diagram of the regulator valve to control the alkali flow and separator liquid level device, including raw liquid alkali tank 1, inlet pipe 1, raw liquid alkali pump 3, outlet pipe 1 4, heater 5, heating steam pipe 6, and connecting pipe 7 , liquid level gauge 8, separator 9, inlet pipe two 10, concentr...
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IPC IPC(8): B01D1/30G05D27/02
CPCB01D1/30G05D27/02Y02P70/10
Inventor 杜修权曾锡华彭小红
Owner 江苏迈克化工机械有限公司