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Energy saving detection and control instrument for warehouse pump
Energy saving detection and control instrument for warehouse pump
Product details
Energy saving detection and control instrument for warehouse pump
Introduction:
Pneumatic conveying is a comprehensive technology that involves fields such as fluid mechanics, materials science, automation technology, manufacturing technology, etc. It is a high-tech project with high conveying efficiency, small footprint, economy, and no pollution. In recent years, pneumatic conveying technology has rapidly developed and been applied in various fields, especially in high concentration phase (solid gas mixture ratio), low-energy consumption, large capacity, long-distance new devices continue to emerge. The high concentration phase and low-speed conveying have made the energy consumption of pneumatic conveying close to that of belt conveyors. Due to the error of traditional level gauge signals, this conveying method has not yet solved the serious waste of gas consumption, the high frequency of valve opening and closing, and the outdated technology of dilute phase conveying friction, which cannot meet the energy-saving requirements of modern industry. Its theoretical research lags far behind practical applications. The key to improving energy conservation and emission reduction in various production enterprises is to solve the precise measurement of material level and control of ash conveying time in the warehouse pump. The pneumatic ash removal system in coal-fired power units and metallurgical industries usually follows the principle of material level priority in design and has time protection function. So in the design process, material level data information must be given top priority. The commonly used level gauges in current ash removal systems include tuning forks, ultrasonic waves, radio frequency admittance, radar, capacitors, etc. They are generally installed in a plug-in manner, and the level gauge probe needs to directly contact the coal ash. Due to the fact that coal ash is a mixture of powdered and solid materials with strong adhesion and poor flowability, it often adheres to the level gauge sensor, resulting in false alarms. To solve this problem, many ash removal systems can only choose to use time-based loading to complete the removal of coal ash or dust powder. In order to ensure that there is no dust blockage in the warehouse pump, the loading time set by the system is relatively conservative, and the ash conveying cycle is very short. The amount of ash conveyed each time is very low, which seriously increases the gas consumption of the ash removal system and causes waste of resources. In addition, frequent dust transportation can cause serious wear and tear on valve pipelines, shorten the service life of the ash removal system, and correspondingly increase the cost of system maintenance and repair.
Technical specifications:
1. Functional technical specifications
●Applicable objects: high temperature, high pressure, flammable and explosive, powder level measurement of pneumatic conveying bin pumps.
●Continuous level measurement of materials; Continuous measurement and control of powder level in various warehouse pumps.
●Measurement range: 0-4000pF.
●Output signal: 4-20mADC transmission output, with adjustable range and variable polarity.
●S P D T relay (up to four channels), normally open and normally closed contacts (A C220V2A). Can be set as high high, high, low, low low alarm; It is also set as regional control, which can achieve direct closed-loop control with the ash discharge valve.
●The instrument can be connected to the network through this interface, or provide RS-485 communication interface according to Modbus or Hertz protocol.
●Power supply: 220VAC/50Hz ± 10% or 24VDC.
●Load characteristics: The maximum load resistance is 600 Ω.
●Damping: The time constant can be adjusted between 0 and 20 seconds, with a step size of 1 second.
●Startup time: 2 seconds, no preheating required.
2. Performance technical specifications
●Accuracy: ± 0.5%, resolution up to 0.002%.
●Stability: better than 0.2FS/year.
●Work pressure: Class A: 40MPa, Grade B: 25MPa, Grade C: 10MPa, D-grade: 4MPa, E-grade: 1MPa, F level: atmospheric pressure.
●Temperature range: Controller's ambient temperature:- 30-60 ℃.
●Working temperature of sensor electrical box:- 30-70.
●Sensor probe working temperature:- 150-240 ℃.
●Humidity range: Relative humidity: 0-90%.
●Transmission distance: The maximum distance for signal transmission between sensors and control instruments can reach 1000 meters.
3. Mechanical technical specifications
●Probe rod: 316L, PTFE, polyurethane, etc.
●Connection thread: 316SST stainless steel, 1Cr18Ni9Ti stainless steel, etc.
●Probe electrical box: low copper aluminum alloy.
●Controller casing: galvanized steel plate with baked paint.
●Types of probe rods: cable type, heavy-duty cable type, etc.
●Process connection: 3/4NPT, 1NPT taper pipe thread; 36 × 2 metric thread; Flanges, etc.
●Electrical connection: M20 × 1.5 threaded hole.
Product features:
●Easy calibration: It can be automatically calibrated at any height using any two points.
●Strong adaptability: It can work reliably in environments with high temperature, high pressure, strong corrosion, strong adhesion, and high dust.
●No maintenance required: Due to the simple structure of the sensor and the absence of movable parts, there is no need for maintenance once it is put into operation.
●LCD display: using LCD display, displaying rich and comprehensive content.
●No drift: Will not drift due to temperature or density changes in the medium.
●Reliable lifespan: The unique technology ensures that the instrument has a lifespan of up to 15 years.
After renovation, each electric field can save electricity: (for reference, the energy-saving rate may vary with changes in load and coal products)
●The time control of eight bin pumps in one electric field has been set from the original 1000 to 4000 seconds, saving approximately 3141KWH of electricity per day.
●The time control of the eight bin pumps in the two electric fields has been set from 2000 to 6000 seconds, saving approximately 2290KWH of electricity per day.
●The time control of the eight compartment pumps in the three electric fields has been set from the original 6000 seconds to 20000 seconds, saving approximately 1500KW of electricity per day H。
●The time control of the eight bin pumps in the four electric fields has been set from 20000 seconds to 50000 seconds (used to determine the unloading status).
●The time control of the eight bin pumps in the five electric fields has been set from 40000 seconds to 80000 seconds (used to determine the unloading status).
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