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Paper green pulp flowmeter | Black liquid pipeline flowmeter

Product Introduction SP-LDE Series Paper Green Pulp Flow Meter | Black Liquor Pipeline Flow Meter is an instrument for measuring the volume flow rate

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Product Introduction

SP-LDE series papermaking green pulp flowmeter | black liquid pipeline flowmeterAn instrument for measuring the volumetric flow rate of conductive liquids using Faraday's law of electromagnetic induction. In the early 1950s, EMF achieved industrial application, and in recent years, EMF production worldwide has accounted for about 5% to 6.5% of the number of industrial flow meters. Since the 1970s, the key controlled low-frequency rectangular wave excitation method has emerged, gradually replacing the early application of power frequency AC excitation method. The instrument performance has been greatly improved and has been widely used.
Advantage
1. Measurement is not affected by changes in fluid density, viscosity, temperature, pressure, and conductivity;
2. There are no obstructing flow components or pressure loss inside the pipe, and the requirements for straight pipe sections are relatively low;
3. Series nominal diameter DN15~DN3000. There are multiple options for sensor lining and electrode materials;
4. The converter adopts a novel excitation method, with low power consumption, stable zero point, and high accuracy. The flow range can reach 1500:1;
5. The converter can be integrated or separated from the sensor;
6. The converter adopts a 16 bit high-performance microprocessor, 2x16 LCD display, convenient parameter setting, and reliable programming;
7. The flowmeter is a bidirectional measurement system equipped with three integrators: forward total, reverse total, and differential total; Can display. Zhuang, reverse flow, and have multiple outputs: current, pulse, digital communication HART；
8. The converter adopts surface mount technology (SMT) and has self checking and self diagnostic functions.
Working principle and technical parameters
SP-LDE seriesPaper green pulp flowmeter | Black liquid pipeline flowmeterA flowmeter used for flow measurement based on Faraday's law of electromagnetic induction. The advantage is minimal pressure loss and a wide range of measurable flow rates. The ratio of maximum flow rate to minimum flow rate is generally above 20:1, suitable for a wide range of industrial pipe diameters, up to 3m. The output signal is linear with the measured flow rate, with high accuracy. It can measure the fluid flow rate of acid, alkali, salt solutions, water, sewage, corrosive liquids, as well as mud, slurry, pulp, etc. with conductivity ≥ 5 μ s/cm. But it cannot measure the flow of gas, steam, and purified water.
As can be seen from the above equation, when the diameter D of the pipeline is fixed and the magnetic induction intensity B remains constant, the measured volume flow rate is linearly related to the induced potential. If an electrode is inserted on each side of the pipeline, an induced potential Ex can be introduced, and the magnitude of this potential can be measured to obtain the volumetric flow rate.

Paper green pulp flowmeter \| Black liquid pipeline flowmeterPerformance Table of Lining Materials
Lining material	major function	medium temperature	scope of application
ptfe PTFE	1. It is the most chemically stable material among plastics, capable of withstanding boiling hydrochloric acid, sulfuric acid, nitric acid, and aqua regia, as well as concentrated alkali and various organic solvents (note: except for hot phosphoric acid). 2. Poor wear resistance and adhesion performance, inferior to polyurethane rubber	-40 ℃~180 ℃ (special orders can choose 180 ℃)	1. Strong corrosive properties such as concentrated acid and alkali 2. Sanitary media 3. Not suitable for negative pressure pipelines
chloroprene rubber NE	1. Has excellent elasticity, high tensile strength, and good wear resistance. 2. Resistant to corrosion in general low concentration acid, alkali, and salt media, but not resistant to corrosion in oxidizing media.	≤65℃	Measure general water, sewage, weakly abrasive mud, and slurry
polyurethane PUNE	1. Has excellent wear resistance (equivalent to ten times that of natural rubber). 2. Poor acid and alkaline resistance.	≤65℃	Neutral and strongly worn mineral slurry, coal slurry, and mud
Acid resistant rubber (Hard rubber)	Can withstand hydrochloric acid, acetic acid, oxalic acid, and ammonia water at room temperature.	≤65℃	general

Paper green pulp flowmeter \| Black liquid pipeline flowmeterPerformance Table of Electrode Materials
Electrode material	Corrosion resistance and scope of application
acid-resistant stainless steel （1Cr18Ni9Ti）	Corrosion resistance to nitric acid, cold phosphoric acid, and other inorganic acids, as well as solutions of many salts and bases, organic acids, and seawater. Poor chemical stability for sulfuric acid, sodium carbonate, chlorine, bromine, iodine and other media. Therefore, it is suitable for non corrosive or weakly corrosive media such as water, sewage, slurry, mud, fiber slurry, syrup and other fluids.
Molybdenum containing stainless steel （0Cr18Ni12M02Ti）	For nitric acid, sulfuric acid at room temperature<5%, boiling phosphoric acid, formic acid, alkaline solutions, sulfite under certain pressure, seawater, acetic acid and other media have strong corrosion resistance. It can be widely used in industries such as petroleum, chemical, urea, and vinylon.
Hastelloy B （HB）	It has corrosion resistance in non oxidizing environments and has good corrosion resistance to all concentrations of hydrochloric acid below boiling point. It is also resistant to corrosion from non oxidizing acids, bases, and non oxidizing salt solutions such as sulfuric acid, phosphoric acid, hydrofluoric acid, and organic acids. It is not suitable for oxidizing acids such as nitric acid and can be tested in seawater, hydrochloric acid, weak acids, and weak bases.
Hastelloy C （HC）	Corrosion resistance in moderate oxidizing and reducing environments, suitable for measuring various organic acids and alkaline media, not suitable for fluoride and chloride.
Titanium (Ti)	Capable of withstanding corrosion from organic acids, alkalis, and other solutions, but not resistant to corrosion from relatively pure reducing acids such as sulfuric acid and hydrochloric acid. But if the acid contains oxidants (such as nitric acid Fe+++, Cu++), the corrosiveness is greatly reduced.
Tantalum (Ta)	Has excellent corrosion resistance, similar to glass. Except for hydrofluoric acid, fuming sulfuric acid, and alkali, it can withstand corrosion from almost all chemical media (including boiling point hydrochloric acid, nitric acid, and sulfuric acid below 175 ℃). Can measure solutions of concentrated hydrochloric acid, nitric acid, sulfuric acid, aqua regia, etc.
Platinum (Pt)	It has good corrosion resistance to various acids, alkali and salt corrosion, but not to aqua regia corrosion.
Stainless steel coated with tungsten carbide	Used for non corrosive and highly abrasive media

Paper green pulp flowmeter | Black liquid pipeline flowmeterProduct spectrum

model	caliber
SP-LDE	15~2600
		code	Electrode material
		K1	316L
		K2	HB
		K3	HC
		K4	titanium
		K5	tantalum
		K6	platinum alloy
		K7	Stainless steel coated with tungsten carbide
			code	Lining material
			C1	Polytetrafluoroethylene (F4)
			C2	Perfluoroethylene propylene (F46)
			C3	Polyfluoroethylene (FS)
			C4	Polyvinyl rubber
			C5	polyurethane rubber
				code	function
				E1	Level 0.3
				E2	Level 0.5
				E3	Level 1
				F1	4－20Madc, Load ≤ 750 Ω
				F2	0-3kHz, 5V active, variable pulse width, output high-end effective frequency
				F3	RS485 interface
				T1	Normal temperature type
				T2	High temperature type
				T3	Ultra high temperature type
				P1	1．0MPa
				P2	1．6MPa
				P3	4．0MPa
				P4	16MPa
				D1	220VAC±10％
				D2	24VDC±10％
				J1	Integrated structure
				J2	Split type structure
				J3	Explosion proof integrated structure

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