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The application of power monitoring technology in cement industry in peak power rationing

time:2017-09-06 16:11:25source:Ziqi compressorauthor: 赵疆昆Clicks: 0
Core Tip: First, the analysis of the characteristics of electricity users in the industry Cement manufacturing under the non-metallic mineral manufacturing industry directory of cement, lime and gypsum manufacturing industry, is heavy industry, refers to

The analysis of the power consumption of industry users
Cement manufacturing belongs to non-metallic mineral manufacturing directory of cement, lime and gypsum manufacturing, belongs to heavy industry, refers to the gypsum or mixed material for cement clinker, by grinding equipment (cement mill grinding) to the specified fineness made of hydraulic cement production activities.
The industry increasingly large-scale production, its production process is very common, there ore mining, ore crushing ~ ~ transmission rotary rotary kiln clinker grinding ~ ~ firing finished package, the nature of production for three shifts of continuous operation.
The industry generally has 110kV or 220kV substations (with security power supply) power supply, and some still have waste heat from the power plant. The electric load is larger than 80 thousand kilowatts or even larger, and the production nature is generally three class continuous operation.
Cement industry user equipment classification table
Two, industry users participating in peak power rationing ability analysis
1. the power consumption of the industry is large and continuous load, not affected by time, season, climate.
The 2. industry emergency peak power rationing can quickly stop the cement mill, raw mill, such as high power consumption with a load of electrical equipment, emergency managing ability, but can not participate in the protection of furnace load emergency peak power rationing.
3. users in the industry stage peak can be carried out through the arrangement of centralized maintenance and production mode, such as the use of centralized maintenance, only need protection of furnace load and part of life lighting maintenance equipment keep electricity, general maintenance load can be about 1000 kilowatts; such as the use of stop production, can be gradually opened to stop production line reduce the production load, reached the peak effect.
Three, industry users to participate in the technical scheme of the peak power
(1) IV level participation scheme for notch grade
The 1. stage of the peak:
When the instruction execution peak priority part of the cement mill in the peak. The premise of the peak, with its own production process can selectively release part of the equipment load in different periods.
2. emergency peak
After the instruction needs the fast input received a staggering limit load, giving priority to air conditioning lighting equipment, can not meet the schedule part of the cement mill in the peak, and then gradually release the load according to the instructions to resume normal production.
(two) notch grade III level participation scheme
The 1. stage of the peak:
On the premise of ensuring safety, based on implementing the IV scheme, in the peak period of all cement mill and part of the raw mill in the peak. The premise of the peak, with its own production process can selectively release part of the equipment load in different periods.
2. emergency peak
1) received instruction after the rapid input of the peak load limit, and then gradually release the load according to the instructions to resume normal production.
2) on the basis of the implementation of IV grade scheme, received instruction after the need to quickly put all the peak cement mill load limit, and then gradually release the load according to the instructions to resume normal production.
(three) notch grade II level participation scheme
The 1. stage of the peak:
1) on the premise of ensuring safety, based on implementing the III scheme, in the peak period of all cement mill, raw mill and mine belt conveyor system in long distance transmission peak. The premise of the peak, with its own production process can selectively release part of the equipment load in different periods.
2) for the mining of slow response time of long-distance transmission belt transmission system equipment need to participate in the peak in advance to ensure that all can be full all the time in the peak load limit.
2. emergency peak
1) received instruction after the rapid input of the peak load limit, and then gradually release the load according to the instructions to resume normal production.
2) on the basis of the implementation of III grade scheme, all of the cement mill, raw mill fast input received instruction after the peak, the active force of rotary kiln shutdown when necessary, to enable the auxiliary equipment to achieve the objective limit load transmission. Then the load is gradually released to normal production according to the instruction.
(four) notch grade I level participation scheme
The 1. stage of the peak:
1) considering that the power gap is larger, the enterprise can be overhauled and the electrical load required for the maintenance equipment is reserved.
2) in the peak period first put the limit of high load, fast response time of the cement mill, raw mill and rotary kiln equipment such as active force limit load equipment; at the same time the response time of the slow step into the mine long distance transmission belt conveyor system, to ensure that all can participate in all the peak load limit.
2. emergency peak
Based on the implementation of the II instruction received peak level scheme on to quickly put into cement mill, raw mill and rotary kiln active force equipments which can limit the load limit load equipment, and then gradually release the load according to the instructions to resume normal production.
Four, industry users participating in peak power rationing and precautions of risk
1. risk and precautions for discontinuation of clinker and raw material grinding system
We must prepare ahead of schedule, until all the materials are exhausted, then we will be able to shut down. Otherwise, we will not be able to start the hoist under heavy load condition, or because of the powder blockage in the transmission chute, which will lead to the failure of the normal transmission of powder for a long time after the system is started again. The preparation time usually takes 10 minutes.
2. mine long distance transmission belt transmission system
It must be prepared in advance. After all the ore materials on the conveyor belt are exhausted, it will be able to stop. Otherwise, it will cause the lift belt to reboot under heavy load condition. The preparation time is determined by the transmission distance, usually not less than 30 minutes.
3. rotary kiln can not stop, stop in the active force equipment within 10 minutes after the rotary kiln to enable auxiliary transmission device. Otherwise, the rotary rotary kiln length up to tens of meters, in the case of emergency stop

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