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Automatic dosing method and device for hydrochloric acid regeneration desilication flocculant

A technology of automatic dosing and flocculant, applied in chlorine/hydrogen chloride purification, chlorine/hydrogen chloride and other directions, can solve the problems of insufficient dosing concentration, unstable operation of acid regeneration desilication system, etc., to achieve convenient equipment maintenance and avoid dosing Unbalanced concentration, the effect of automatic control and real-time adjustment

Active Publication Date: 2013-04-03
白东 +1
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Problems solved by technology

[0008] The purpose of the present invention is to provide an automatic dosing method and device for hydrochloric acid regeneration desilication flocculant, which solves the problem of unstable operation of the acid regeneration desilication system caused by insufficient or excessive flocculant dosage concentration, and can realize the flocculant dosage Automatic and precise control of

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  • Automatic dosing method and device for hydrochloric acid regeneration desilication flocculant
  • Automatic dosing method and device for hydrochloric acid regeneration desilication flocculant

Examples

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Embodiment 1

[0038] see figure 1 The hydrochloric acid regenerated desiliconization flocculant automatic dosing device provided in this embodiment is used to automatically add flocculant on demand to the flocculation tank 1 that continuously injects the neutralized waste acid, and the flocculation tank 1 is supplied by the flocculant The pipe (not shown) communicates with the flocculant storage tank 5, and the flocculant is stored in the flocculant storage tank 5, and a waste acid supply pipe is connected to the flocculation tank 1, and the waste acid supply pipe and the waste acid source 8 connections.

[0039]The automatic dosing device includes a waste acid flow meter 2, a waste acid pH meter 4, a waste acid thermometer 3, a flocculant dosing pump, a flocculant flow meter 7, a flocculant concentration meter and a control unit 9. The waste acid flow Meter 2, waste acid pH meter 4 and waste acid thermometer 3 are respectively installed on the waste acid supply pipe, the flocculant dosing...

Embodiment 2

[0050] see figure 2 , this embodiment provides an automatic dosing method for hydrochloric acid regenerated desiliconization flocculant, the waste acid from the upstream process section (waste acid neutralization tank) flows into the flocculation tank 1 at the waste acid volume flow rate F2 (m3 / h), Described automatic dosing method comprises the steps:

[0051] Step 1: Set the target concentration of the flocculant in the flocculation tank 1, and collect the actual volume flow rate of the waste acid, the pH value of the waste acid, the temperature of the waste acid, and the actual volume flow rate of the flocculant.

[0052] Step 2: Calculate the volumetric flow rate required for the flocculant through the dosage calculation formula, the dosage calculation formula is F3=(N / 100)×F2×(T / 40)×[(PH / 4.2) ×1.05], where: F1—actual volume flow rate of flocculant (m 3 / h), F2—the volume flow of waste acid (m 3 / h), F3—the volume flow rate required for flocculant addition (m 3 / h), N...

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Abstract

The invention provides an automatic dosing method and device for hydrochloric acid regeneration desilication flocculant. The method comprises the following steps: collecting the actual volume flow rate of waste acid, the pH value of the waste acid, the temperature of the waste acid and the actual dosing volume flow rate of flocculant; according to the target concentration of the flocculant in a flocculation tank and the collected actual volume flow rate of waste acid, pH value of the waste acid, temperature of the waste acid and actual dosing volume flow rate of the flocculant, calculating the required dosing volume flow rate of the flocculant; and then, comparing the required dosing volume flow rate of the flocculant and the actual dosing volume flow rate of the flocculant, controlling the rotation speed of a flocculant dosing pump to enable the two dosing volume flow rates to be the same if the two dosing volume flow rates are different, thereby realizing the automatic control and real-time regulation on the dosage of the flocculant. Thus, the problems of oversized or undersized flocculant dosage, unbalanced flocculant dosing concentration, untimely concentration regulation and the like caused by the existing manual intervention control are avoided.

Description

technical field [0001] The invention relates to a hydrochloric acid regenerated desiliconization flocculant automatic dosing method and device. Background technique [0002] At present, polyacrylamide is generally used as a flocculant in the desiliconization process of hydrochloric acid regeneration to flocculate the neutralized waste acid, and at the same time, the colloidal ferric hydroxide that absorbs a large amount of silica quickly and effectively settles to form sludge. The flocculant is made of powdered polyacrylamide and desalinated water. The dosage is generally 5-20ppm (ppm is the percentage by weight, ppm=mg / kg=mg / L), which needs to be determined according to the desiliconization process parameters. adjusted for adjustments. The control of dosage is very important to the effect of desiliconization, which directly affects the quality of desiliconization liquid (that is, the waste acid liquid after desilication) and the quality of iron oxide powder produced by the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B7/07
Inventor 陆正华周光升陈琦
Owner 白东
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