氧化铝沉降车间操作（Operation of alumina deposition workshop）

1、氧化铝沉降车间操作（Operation of alumina deposition workshop）1 regional responsibilities1.1 regional scopeIt includes all the auxiliary facilities in the rough, semen tank and the whole building.1.2 regional tasksThe task is to get the settlement and separation from the crude liquid floats in the 80 - 150mg /

2、 L, refined by leaf filter, get the sodium aluminate solution to meet the requirements of precision floating = 15mg / L, and the corresponding prepared semen to decompose, the residue was isolated from zooplankton the formation of the settlement of back washing system.2 process and principle2.1 Proc

3、ess OverviewSettling tank overflow by two overflow pump through two overflow pipe into the crude tank, with hydraulic coupling control pump with 1:5 speed range to filter, under the pressure difference across the filter filtrate through the liquid collecting tube after collecting semen flowing into

4、tank through semen pumped to the plate type thermal decomposition of exchange. In the filter cloth is silicon slag outside, in the park, through the washing water washing and flushing pump filter cake from inside the shell, filter cake and water mixture by gravity chute into the filter cake tank, an

5、d causticization slag evaporation in stir and sent to the settlement of 2# sink by adhesive liquid the reverse washing and recovery. In combination with the characteristics and requirements of the process, lime milk or caustic slag is used as a filter aid to help filter. At the same time, the equipm

6、ent (coarse and fine filter, liquid pump) operation after a certain period, shall be cleaned with alkali to remove scar, insoluble, dredge pipe, smooth flow, after cleaning the waste re-use return evaporation mix tank.2.2 basic principlesThe main principle of this process is the principle of leaf fi

7、lter leaf filter, 385m 2 Kelly filter is a filter, the filter process is a solid-liquid separation process, filtration, filter media filter is immersed in the suspension, through the filter media the pressure difference between the two sides, the pressure difference by the thick liquid pumping to ac

8、hieve, the suspension of the filtrate through filter cloth pore become pure filtrate most particles are blocked at the other side of the cloth to form a silicon slag layer. A leaf filter cycle is mainly composed of four processes: feeding, hanging mud, operation and unloading. Before loading, the ca

9、r is to be loaded and the unloading is also called a brush or stop. The mud suspension is a process of coarse liquid circulation for a period of time before the official operation.3 main equipment list4 contact system4.1 contact network diagramDispatch roomScottMaintenance value Supervisor - value S

10、upervisor - Electrical, planning and controlling personnel on dutyScottThe main control room of the workshop - the main control room of leaf filtration - downstairs position4.2 normal contact reporting system4.2.1 is responsible for the operation by the contact, areas outside the region within the c

11、ontact and production arrangements; contact by telephone contact, must hear each other before work.4.2.2 contact settlement in time according to incoming material.4.2.3 in accordance with the workshop, scheduling instructions, by the job director notify the region within the posts for parking.Before

12、 the 4.2.4 opens and stops, the master shall issue the notice of opening and stopping for the patrol personnel, and the patrol personnel shall report to the master after the preparations are made.4.2.5 operation master shall know the production, equipment operation and material balance at any time o

13、r at regular intervals,The master must report to the head of operations.4.2.6 patrol personnel regularly check, report to the master and operation officer.4.3 emergency contact reporting system4.3.1 patrol officers found the emergency immediately and contact the master in the inspection process, to

14、report to work long after parking, or on-site parking equipment after the first stop to the main control and long operation report.4.3.2 main control room through the monitoring system to find the emergency situation, stop immediately or notify the patrol personnel on-site inspection and then stop,

15、and then report to the head of operations, job chief report to the dispatcher.4.3.3 in case of emergency, please cooperate with the work area. When parking, please contact the operation area immediately and cooperate with you to report to the dispatcher after parking.4.3.4 personal safety accident,

16、stop immediately, notify the hospital and the nearest post personnel after rescue, and then report.5 check and prepare before work5.1 check the flow is correct, the valve is flexible and easy to use.5.2 lubrication, fastening and safety inspection of coarse liquid pump and speed regulating system, s

17、emen pump etc.5.3 check whether the hydraulic system of the leaf filter is normal or not.5.4, check the leaf filter machine whether there is debris, the head locking device is flexible, easy to use; all normal, after closing the cylinder, standby drive.5.5 inspect and test the filter cake, pump and

18、water pump according to the general equipment regulation.5.6 check the agitation of tank and check the liquid level so as to control the balance of liquid quantity.5.7 check the electrical insulation of each equipment is qualified.5.8 check the operating tools, prepare the required materials, all re

19、ady, ready to drive.6 startup program6.1 start coarse coarse liquid mixing tank backward, start at the same time filter aid to pump crude tank smoothly and uniformly adding filter aid.6.2 start the coarse liquid pump, after 20 minutes or so, after the mud phase, into the normal operation process.6.3

20、, check the semen trough level, to meet the feeding requirements, notify the board heat exchange positions ready to receive material, start the sperm pump.7 normal operation7.1 operating conditions and technical and economic indicators7.1.1 semen Nk164 175g/l, Rp 1.09.7.1.2 semen seston = 15mg/l, A/

21、S = 300, F/A 0.0125%.7.1.3 semen temperature:100105 DEG C.7.1.4 hydraulic power oil pump 7.5KW, oil flow 22.5L/m, working point pressure 135bar, design maximum pressure 150bar.7.1.5 leaf filter operating pressure 3.8bar (g), 3.5bar (alarm pressure gauge). The design of 5.3bar (pressure gauge).7.2 pr

22、ocess controlAccording to 7.2.1 crude tank memory and supplied material, open one or less open a leaf filter; coarse liquid or large amount of zooplankton is high, can open a leaf filter or wash brush truck, and less open a leaf filter; in a word in order to guarantee the semen quality as the standa

23、rd, guarantee the liquid volume in the process out of balance, smoothly.7.2.2 leaf filter stage, in order to ensure the normal flow speed, pump speed continues to accelerate, in the rising pressure, when the time reaches 3.5bar, to open parking and another machine index reached 3.8bar, should brush

24、car parking.7.2.3 often observe the semen situation, if found running muddy phenomenon, immediately change the filtrate flow direction, find out the reason and deal with it, then change back to the semen groove.7.2.4 operation, often observe the flow changes, so that the pump flow within the allowab

25、le range of operation.7.2.5 check the storage of the tank regularly, in case the malfunction of the liquid level indication alarm system and the malfunction of the pump chain system can lead to the occurrence of slot or empty slot accidents.7.2.6 when the serious leakage or tripping occurs, should i

26、mmediately reverse pump, first developed by switching of the pump, the pump outlet valve starts to open, and then close the outlet valve to stop the pump, then stop the motor fault, discharge cleaning.7.2.7 always grasp the vulnerable parts, if found serious wear and tear, timely replacement mainten

27、ance.7.2.8 class inspection, inspection, careful and careful, once found stirring or pump motor tripping or serious abnormalities, should immediately contact inspection processing.7.2.9 at any time or regular, regular inspection of lubricating oil or hydraulic oil, oil shortage should be added in ti

28、me, oil pollution is timely oil change, oil change must be cleaned before changing, can not use mixed oil.7.2.10 according to the properties of crude liquid, the proportion of filter aid should be strictly added and added normally.7.2.11 strictly control the amount of sewage and minimize the process

29、 of adding non productive water.7.2.12 operate in accordance with safety procedures and operating procedures to avoid equipment or personal safety incidents.7.2.13 in accordance with the equipment maintenance system, make good use and good management of equipment, strengthen inspection and maintenan

30、ce, maintenance, extend the service life of equipment, and maintain efficiency and performance.7.3 inspection routeCoarse liquid pump - sperm pump - filter cake tank - flushing tank - lye tankHereHydraulic station - - leaf filter - - - - coarse groove semen tank7.4 field record7.4.1 records the oper

31、ation process;7.4.2 regularly or at any time after the circuit inspection, the equipment running state, lubrication records clearly.7.4.3 records all kinds of notices received by superiors, and records the tasks, the time and the completion of the tasks.7.4.4 inspection process, abnormal circumstanc

32、es must be recorded clearly.8 parking procedures8.1 normal parking8.1.1 contact the main control room, ready for parking or switching.8.1.2 stop crude liquid pump, close the inlet valve, then open the safe discharge pipe, the discharge valve in the open position, open the shell at the top of the exh

33、aust gas valve, the filter completely emptying, internal pressure and liquid level are reduced to the specified value.The 8.1.3 main control room selects and starts the oil pump and begins to output the high voltage power.8.1.4 turn on the locking device of the nose and press S2 and S3 to finish the

34、 process.8.1.5 on the cylinder casing above the switch S6, notice downstairs to open the pump hot water flushing, flushing filter in the filter cake with high pressure water spray cleaning, the interior of the casing and slide at the same time, until the meet the requirements so far, stop the flushi

35、ng pump.8.1.6 check each filter cloth, the small mouth pad is no problem, otherwise timely processing.8.1.7 inform relevant personnel to pump slag in time according to the level of slag chute.Eight2 emergency stop8.2.1 leaf filter failure, such as die cushion leakage or cushion, filtrate muddy runni

36、ng seriously, immediately enable the leaf filter standby, crude liquid pump and the filter and the corresponding stop fault of the pump, such as machine failure, notify the settlement by reducing the feed quantity, and immediately processing fault early, drive, to ensure that the amount of fluid bal

37、ance.8.2.2 such as crude liquid pump failure, such as packing material leakage serious, bearing fever, impeller stuck, motor burned or discharging valve serious leakage, immediately pour pump, start by leaf filter switching pump and the filter stop after stop the pump fault.8.2.3 semen pump failure,

38、 notify the dispatch room to contact related positions, such as standby, immediately pour the pump; first start another pump, and then stop the fault pump. If there is no reserve, the heat exchanger shall be informed to stop, and the leaf filter shall be in circulation at the high position of the semen groove,