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Sampling type size density measuring method

A technology of density measurement and slurry, which is applied in the direction of measuring device, specific gravity measurement, and determination of specific gravity by measuring pressure difference, etc. It can solve problems such as inaccurate measurement, use of radioactive sources, easy blockage, etc., and achieve the effect of ensuring accuracy

Inactive Publication Date: 2012-03-21
杨玉娟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the existing measuring means cannot satisfy the stable operation and accurate measurement of the slurry density measurement system in the desulfurization absorption tower, and to provide a method for measuring the slurry density of samples
[0007] The present invention uses the most primitive measuring means to automatically and periodically send the gypsum / limestone slurry into the slurry sample tube or the slurry sample container to periodically measure the slurry density, which solves the problems of inaccurate measurement, easy blockage, short life and the use of radioactive sources, etc.

Method used

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  • Sampling type size density measuring method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Option 1, pressure method one

[0053] Such as figure 1 As shown in the connection diagram of the dual pressure transmitter equipment, the slurry sample pipe 4 is connected to the bottom of the slurry absorption tower or the outlet branch of the gypsum slurry discharge pump (omitted in the figure) through the first electromagnetic-pneumatic valve 1, and through the second electromagnetic-pneumatic valve 2 Connect the industrial water pipeline, and connect the drain pipeline through the third electromagnetic-pneumatic valve 3.

[0054]Two pressure measuring points are set on the slurry sample tube, the height difference between the two pressure measuring points is H, and the two pressure measuring points are connected to a pressure transmitter (not shown in the figure). At the beginning of the measurement, open valve 1 at regular intervals (such as half an hour), judge the amount of slurry entering the slurry sample tube according to the signal of pressure measuring poi...

Embodiment 2

[0058] Option 2, pressure method 2

[0059] Such as image 3 The equipment connection diagram of the single pressure transmitter scheme shown in the figure, only one pressure measuring point is set on the slurry sample tube 4, the upper pressure measuring point 2 is removed, and the height above the pressure measuring point is set at H A bypass slurry overflow pipe 5 is set, two measuring points of liquid level measuring point 1 (LI-1) and liquid level measuring point 2 (LI-2) are set in the bypass slurry overflowing pipe 5, and the pressure measuring point It is connected with a pressure transmitter, and the rest of the structure is the same as that of Embodiment 1.

[0060] When measuring, open valve 1 at regular intervals (such as half an hour), judge the slurry height entering the slurry sample tube from the signal of liquid level measuring point 1 after reaching H, close valve 1, and judge the slurry height by liquid level measuring point 2. Exceed H, delay short time (...

Embodiment 3

[0065] Option 4: Weighing Method II

[0066] Such as Figure 5 The equipment connection diagram of the weighing method shown in the figure, the slurry sample container 7 is placed on the weighing device 6, the slurry sample container 7 is connected to the measured slurry through the first electromagnetic-pneumatic valve 1, and the second electromagnetic-pneumatic valve 2 is connected to the industrial water pipeline, and an ultrasonic liquid level measuring device 9 is installed above the slurry sample container 7, and the bottom of the slurry sample container 7 is connected to the drain pipeline through the third electromagnetic-pneumatic valve 3.

[0067] At the beginning of each measurement cycle, the solenoid valve 1 is electrified and opened to automatically send the slurry sample to be tested into the slurry sample container. The ultrasonic liquid level measuring device confirms that the amount of slurry meets the measurement requirements, and the solenoid valve 1 is de-...

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Abstract

A sampling type density measuring method comprises the steps of preparing a size sample tube or a size sample container, sampling size to be tested into the size sample tube or the size sample container, measuring by adopting a pressure method or a weighing method and computing to obtain the density of the size after the size sample is static and stable, and evacuating the size sample in the size sample tube or the size sample container to wait for the next time of measurement. With the method, a small part of the size is adopted as a sample automatically and periodically, the volume of the sample is automatically measured by automatically weighing the mass of the sample (or the volume of the sample is fixed), and the density of the size is obtained by dividing the volume of the sample by the mass of the sample. Or when the method is used for measuring the pressure intensity of the sample, the fixed height of the sample is adopted, or the pressure difference of samples among different liquid columns is measured, so that the density can be measured by the relationship between the pressure intensity and the density. By adopting the method, the error links in the measurement are less, the accuracy of the measurement is high, and the measurement is conducted automatically and periodically.

Description

【Technical field】 [0001] The invention belongs to the technical field of slurry density measurement, and is particularly suitable for measuring the density of boiler unit flue gas desulfurization island slurry and other slurry. 【Background technique】 [0002] At present, there are three measurement methods that are widely used in flue gas desulfurization island slurry density measurement, but all three methods have certain shortcomings, which cannot meet the needs of stable operation and accurate measurement of the desulfurization slurry density measurement system, and affect the desulfurization efficiency of boiler exhaust flue gas , the three methods are: [0003] 1. Coriolis force mass flowmeter density measurement method, its disadvantages are: the flow through the flowmeter is determined according to the requirements of the flowmeter, causing pipeline blockage and measurement termination; increasing the flow through the flowmeter will accelerate the wear of the flowmete...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N9/26G01N9/02G01N9/00
Inventor 杨玉娟
Owner 杨玉娟
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