High temperature flue gas flowmeter Power plant steel pipeline flue gas flowmeter High temperature flue gas flowmeter Power plant steel pipeline flue gas flowmeter Introduction of Flue Gas Flow Meter : High Temperature Flue Gas Flow Meter  High temperature flue gas flow meter, with constant power measurement method, an effective solution to the temperature | key issues humidity, and gas mass flow meter and the large diameter low flow rates are inherent characteristics, to achieve a high-precision measurement of large pipes. The special material plus anti-corrosion coating can effectively solve the problem of anti-corrosion and ensure long-term high-precision measurement. The sensor only has two smooth probes, so there is no problem of blocking. If there is mud and water adhesion probe, an automatic cleaning device can be added. High temperature flue gas flow meter features : The principle of high-temperature flue gas flowmeter : Flue gas flow meter applications : High temperature flue gas flow meters are widely used in a variety of industrial applications, including: steelmaking, power generation, petroleum, metallurgy, boiler piping, chemicals, pharmaceuticals, building materials processing, coal mining and mining, cement manufacturing and packaging, etc. industry. In particular, gas and gas quality analysis of pipelines; leakage gas testing, primary air blasting of power plants, measurement of secondary air, measurement of blast furnace gas in ironworks, and supervision and control of flue gas flow;  Flue gas flow meter application â—† Flue Gas Flowmeters in Public Works-- Applications of Supervision and Control of Electricity, Gas and Water Treatment Â
Tungsten carbide roller has characteristics of good wear resistance, high temperature red hardness, thermal fatigue resistance and thermal conductivity and high strength , have been widely used in high-speed wire rod, bar, rebar, seamless steel tubes, etc. Domestic production of tungsten carbide roller materials mostly WC- Co, WC- Co- Ni- Cr two series, and the content of Co, Co- Ni - Cr is in the range of 6wt% ~ 30wt%. From the use of perspective, tungsten carbide rollers has good mechanical properties, its flexural strength up to 2200 MPa or more, shock toughness up (4 ~ 6) × 10^6 J/ m^2, Rockwell hardness (HRA) is up to 78 to 90, widely in the high-speed wire rod rolling process, which is much higher than single-slot chilled cast steel or high speed steel rolls.Tungsten carbide is made of Tungsten Carbide Powder and binder phase (such as drilling, nickel, etc.), and then pressing and sintering, regardless of the conditions under cold rolled or hot rolled has excellent wear resistance, tungsten carbide rollers has been widely used in pre-finishing mill and finishing of high-speed wire rod currently. On the performance of tungsten carbide roller in hot-rolling wire rod , the material must meet the following requirements:
Tungsten carbide roller material design
Tungsten carbide roller category
Tungsten carbide roller production process control Carbide Roller,Carbide Ring,Mill of Rolling Line,Steel Wire Rod,Mill Rolling Finish Stand,Mill Roller Groove Type Luoyang Golden Egret Geotools Co., Ltd , https://www.xtcthermalspray.com
( 1 ) High linearity, high stability, and high accuracy
( 2 ) Range ratio 100 : 1 (up to 1000 : 1 ), which can be expanded according to user requirements
( 3 ) Small flow can be measured down to zero with a resolution of 0.001m|s
( 4 ) High-precision measurement of large-diameter small flow (pipe size up to 15m )
( 5 ) The influence of vibration is negligible, the pressure loss is negligible, and it is insensitive to small particles such as dust
( 6 ) The temperature and pressure of the medium are independent and the temperature of the medium is self-compensated. The temperature of the medium can reach 500 °C.   High-precision measurement of wet gas
( 7 ) Type dynamic online correction for flow signal
( 8 ) LCD display, instantaneous flow, cumulative flow at the same time
The high-temperature flue gas flowmeter is a flow meter based on the thermal diffusion principle. That is, when a fluid flows through a heating object, the amount of heat loss of the heating object is proportional to the flow rate of the fluid. That is, the sensor of the flowmeter has two standard-grade RTDs , one for the heat source and one for measuring the temperature of the fluid. When the fluid flows, the temperature difference between the two has a non-linear relationship with the size of the flow. The meter can then convert this relationship into a linear output that measures the flow signal.
    Flowmeters manufactured using the principle of thermal diffusion have two design methods: one is based on the principle of constant temperature difference and the other is based on the principle of constant power. Based on a common data model:. P | △ T = A + B (Q) N ?? -1 where: P ?? - power dissipation, △ T ?? - temperature difference between the two sensors, A, B is The coefficient related to the thermal properties of the gas. Constant power Principle: constant power dissipation, the temperature difference △ T and flow rate Q of the fluid to a decreasing exponential function relation.
High temperature flue gas flowmeter performance indicators :
1 : Measurement range: 0 to 120m|s ( 20 °C, 101.33KPa )
2 : Outer Diameter of Pipe: 0.1m to 15m
2 : Accuracy: ± 1 % of reading ± 0.5 % of full scale
3 : Repeatability: ± 0.15 % FS
4 : Ambient temperature range: -40 °C · 80 °C humidity less than 90 % RH
5 : Medium temperature range: -40-500 °C
6 : Output: Flow: 4-20mADC ; Temperature: 4-20mADC Communication: RS232|RS485
7: Power supply:;? 24VDC 220V relay output limit
8 : Process pressure: < 1.6Mpa (expanded on request)
9 : Probe Structure: The standard probe is M6 , 316 stainless steel rod.
Gases for pipelines; general-purpose systems; biogas; gas;natural gas; liquefied gas; boiler preheated air
â—†Application of Flue Gas Flowmeter in Oil and Gas Industry
Energy Exchange; Filling Well Gas Recovery; Gas Metering; Gas Quality Analysis; Leaking Gas Testing; Natural Gas Measurement; Torch Gas Monitoring and Control
â—†Application of Flue Gas Flowmeter in Power Industry
Gas measurement during gas distribution in fuel systems; Measurement of various gases in boilers and auxiliary systems; Gas measurement in gas furnaces; Hydrogen measurement; Measurement of primary and secondary air in power plant blast furnaces
â—†Application of Flue Gas Flowmeter in Chemical Industry
Flue gas circulation monitoring; gas flow measurement in sampling system; gas flow measurement of induced draft fan; ammonia gas measurement in fertilizer plant; various gas flow measurement in battery factory
â—†Application of Flue Gas Flowmeter in Metallurgical Industry
Measurement of aerated iron and steel plants; measurement of blast furnace gas in ironworks; measurement of coke oven gas in coking plant; measurement and control of heating furnace gas (blast furnace gas, coking gas, natural gas, etc.) in rolling mills; hydrogen and oxygen in heat treatment quenching furnaces, etc. Nitrogen and other gas controls
â—† Application of Flue Gas Flowmeter in Pulp and Paper Industry
Measurement of gas in wastewater treatment systems; monitoring and control of flue gas flow; secondary / third air recovery from boilers; measurement of gas and air supply from boilers
â—†Application of Flue Gas Flowmeter in Food and Pharmaceutical Related Industries
Addition of fresh air during processing operations; CO2 treatment in breweries; flow of hot air in bottle sterilizers; gas flow measurement during thermal oxidation; ventilation system; boiler intake, exhaust gas, process control
â—†Application of Flue Gas Flowmeter in Environmental Protection Industry
Gas measurement during biogas use; Measurement of chlorine gas during chlorine treatment; Measurement of aeration tank gas during sewage treatment; Flue-pipe flue
1. Sufficient anti-fracture strength;
2. Good abrasion resistance;
3. The smooth surface finish;
4. Excellent corrosion resistance, thermal fatigue, thermal cracking performance.
Tungsten carbide roller rings can working in bad conditions , small profile rolling (especially rebar rolling) process conditions is harsher than the high-speed wire rod, and therefore corresponds to the profile rolling ,tungsten carbide rollers recommend using high binder phase carbide.
Pre-finishing all vehicles roller should ensure its high toughness, strength, rigidity and thermal conductivity, followed before considering its wear resistance. When designing each vehicles roller, pre-finishing materials should choose carbide grades of Co, Co- Ni- Cr binder content is high (greater than or equal to 25wt%) , requiring an average WC grain size of coarse (5μm ~ 6μm), to obtain a higher shock toughness, proper strength and hardness. For the finishing of the roller movements, particularly the last two rollers of the finish rolling, which suffered load is small, and high relative velocity of the material to be pressed (80 m / min ~ 120 m / min). In this case, the wear resistance of the roller to be the most important requirements, and must ensure the strength , timpact toughness and hardness of a reasonable match, so the binder of Co / Ni content ratio and the average grain WC control of particle size and other factors must have greater control in front of different pre-finishing rolling roll.
According to the structure of tungsten carbide rollers, it can be divided into solid tungsten carbide roller and composite tungsten carbide roller. Solid tungsten carbide rollers have been widely used in pre-finishing and finishing stands high speed wire rod mill (including fixed reducing the rack, pinch roller rack). Composite tungsten carbide roller is made of cemented carbide and other materials, and it can be divided into tungsten carbide composite roll rings and solid tungsten carbide composite roller. Tungsten carbide composite roll rings mounted on the roller shaft; solid tungsten carbide composite roller will be directly cast in the roll axis to form a whole, a large load is applied to the rolling mill.
Tungsten carbide rollers produced by powder metallurgy method, the key to its process control is the chemical composition of the material and the mixture was prepared, pressed molding, sintering and deep processing and other preparation process parameters.
1. Preparation of starting material (WC focus quality): As the WC raw material and quality control of the use of different levels of quality may fluctuate, resulting in adverse effects on microstructure.
2. Preparation of the mixture: Mixture preparation is the key to the production process of the roller, the roller of failure modes - trachoma, mainly generated by this procedure.
3. Pressing: roller pressing is an important process of the roller mill.
4. Sintering: roller sintering is to determine the final quality of the roller production processes, use of advanced low-pressure sintering technology, HIP sintering technology can greatly improve the performance of roller.
5. Deep processing: deep processing rollers have a greater impact on the quality and accuracy of the roller surface.