Introduction Subsidiary PetroChina Southwest Oil Purification Plant registered within Western North Gas Area within Sichuan Jiangyou City, Sichuan Jiangyou inside the frontier Leikoupo dam container of gas as raw matter for purification of gas processing, daily processing look at 500 000 m3, is paramount companies inside Sichuan Province. The main wares are: sulfur, oil LPG , Gas, presentation of chemical goods promoted at house and abroad. Northwest Gas Area purification plants normal from the petrochemical industry, gear types, tall value, supportive rates upward at the pinnacle onto apparatus and continuous operation, tall ease of access needs. Northwest Sichuan Gas Area
purification plant desulfurization officer 1 #, two # couple Cycle Pump throughout usual campaign "of the one stand," pair Motor Are direct-frequency start, impose the present, not totally sways the provides existence expectancy possessed a larger affect on the network. Desulfurization process, day and evening instant cycle water warmth greater, around the distribution water inside the direction of make money from the pivotal changes. However the opening machines frequency constant tide running, simply via modifying Valve The gate inside the direction of adapt the capability of distributing water across guy-made amends inside pipe resistance, changed become threadbare and shred pipeline inside the direction of move Volume Of Water, effecting inside a great area of the vitality trashed inside the valve, resulting inside tall charges. Use taps regulate the flow, although not hurry the economy, and increased the workload of employees, laws and regulations isn't timely, but furthermore answer inside large or low pump pipe, flow farthest or not big enough, instilling the security from the demonstration style and kit run. To dampen the commercial listed of desulfurization of production, sweeten the strategies suitability and efficiency, the imperative shortage for 1 #, two # providing water propel dash Saving Energy.
After restated analysis, inspection, detailed evaluation from the hurry manoeuvre inventions presently available on the market and ultimately desperate towards utilisation Beijing Lead China peking presentation HARSVERT-An online insurance lead top high frequency ripper tools for the couple distributing water propel Economical.
2 toiling aspects 2.1 Process Northwest Gas Purification Plant Desulfurization distributing water technique includes from the successive five components: chilly towers, the center pool, circulating pump, overflow pumps, desulfurization unit. Released in the desulfurization styles cycle sultry water, chilled through the chilly tower in to the middle pool of storage which majority of water via circulating water pump for re-utilization of desulfurization equipment, substitute forks in the overflow Pipeline Overflow. Process flow techniques drawing commanded within Figure 1.
2.2 Process obligations (1) unfailing warmth and from the awesome tower
Needed constant coldness type (4 charitable organisation non profit organizations non profit organizations t eight non profit organizations ) like the circulating propel valve towards free-spoken a lots amount of water increases, the chilly water warmth decreases, volume decreases, the temperature increases.
(2) at worst insist clamp control
Desulfurization equipment required towards assure door Ripper tools within insist (more than .45Mpa) underneath the premise of recycled water retaining water around plausible towards encounter the desulfurization tactic inside the direction of encounter demonstration needs, the minimum threshold pressure.
2.3 place mood Inverter room extended 7200mm, breadth 3000mm.
2.4 Area Instrument Meter Status
Pressure transmitter 1: Single finish merchandise 4 ~ 20mA practise load commitment of 300 (two-wire system).
Temperature Transmitter 1: Single finish wares 4 ~ 20mA perform complication probable of 300 (four-wire system).
2.5 engine and pump parameters
Motor and propel parameters, for example commanded within Table 1.
Table 1 pump and propel parameters
1 #, two Number One # send parameters, parameters of circulating water propel # two Water propel move Model Y3556-4/YKK400-4
Model 14SH-9A Ranked vitality 315kW evaluated might 315kW
Ranked current 6kV rated flow 1170m3 / h
Ranked Current 37.7A Ranked elevator 65m
Ranked hurry 1475r/min rated tempo 1450r/min
Energy component .86 three on-site debugging and complication solutions
3.1 towards location Taking into fund the tapered paddock installation conditions, the outlook determined inside the direction of avoid frequency counter invention and by hand put individually: the 1 #, two # modification apparatus (single Dimension (mm) (W H D ): 3300 2574 1200) positioned edge by side within the ripper tools room, whereas the bypass propel cycle counter is spread in this area. This result placed the venue not just in direction of explain the issue, but furthermore in direction of ease the operator towards tolerate in recycled water that may be seen frequency ripper tools transmission situation, more both mobile phone industry's.
3.2 urgent situations impel Reference desulfurization process copes of "pressure" is in direction of double-check presentation of enough situation for desulfurization, that insist towards .46Mpa, can assurance the rhythmic performance of desulfurization unit. Pump outlet insist is not high enough, you can't rhythm the promise vitality water, recycled water cannot be published in direction of the awesome tower insist perfects excessive towards propel water again the cooling cycle, the effectiveness isn't high. Therefore made the decision towards engage a "constant pressure" closed-loop control, acclimatise the regularity ripper tools for any presented frequency, the minimum insist wanted towards find process critical point, it is essential to come across the engineering appeal insist also guarantees the recycled water, to ensure that the temperature divergence and from cooling tower t tight at between 4 ~ eight . The investigate manoeuvered plainly that past a granted frequency is 43Hz, the pump insist (.51MPa) greet the mechanical needs, temperature 4.92 , therefore the shove predetermined 43Hz because the critical point.
Debug parameter table proven in Table 2.
Table two debug parameter table 3.3 transmitter consignment volume Since the area is just a solitary finish product from the pressure transmitter, with a getting amount of only 300 , wherever the ripper tools built-in PLC S7-200 model EM235 Analog Input Module The input opposition of 250 if the couple ripper tools analog input circuit in series, then your input resistance from the couple EM235 is going to be 500 , solitary pressure transmitter doesn't carry the happy couple EM235 module, this different isn't achievable. Therefore, pressure transmitter location hollow to to some lone frequency appliance EM235 module such as the S7-200 analog earnings resulted module EM232 live the expanse real-time items created pressure, using the output submission as Converters EM235 another analog input. Block sketch proven in Figure 2. This fashion doesn't raise in input prices (hardware) within the situation, by spinning PLC program to some PLC from the EM232 module # ripper tools input every youthful person the interval real-time pressure attitude signal, pressure to solve the heaviness of inadequate consignment amount of the transmitter to attain just one Drag the two transducer pressure transmitter station of "closed loop" control.
4 energy-saving knowing 4.1 Principle of Frequency Conversion of one's
Proven in Figure 3, as asserted by convictions of fluid mechanics:
Figure 3 bewilders standardising waterflow and drainage and frequency guideline of one's equivalence chart, H2-BC-H3 region adopting mistook modification for that amendment water in order to save numerous energy.
When prospecting frequency control, it might demand to tide by
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