SU1535635A1 - Method of cleaning gases from dust - Google Patents

Abstract

The invention relates to the purification of gases from dust in electrostatic precipitators. To increase the degree of gas cleaning from dust, a 10% solution of the bottom residue of the distillation of caprolactam in the amount of 0.5 g / m ^{3 is} injected into the dusty gas produced by the normal electro-corundum at the entrance to the electrostatic precipitator. The degree of gas purification is 98%. 1 hp f-ly.

Description

The invention relates to methods for purifying gas from electrostatic dust from electrostatic precipitators and can be used in mining and non-ferrous metallurgy, chemical, cement and other industries.

The aim of the invention is to increase the degree of purification of gases from dust.

Example 1. As a conditioning reagent, the bottom residue of the distillation of caprolactam, obtained during the production of caprolactam through cyclohexananone, is used.

The bottoms of the distillation of caprolactam has the following composition, wt.%:

Caprolactam9-- 20

First salt salt of amiporo-caproic acid 23--47

Auditors Capro-Dacta22-43

(pitch13-19

Available NaOH1-3

In dust and gas flow production of normal electrocorundum with an initial dust content of 1.2 m1 and a temperature of 150 ° C

A 1% solution of the bottoms of the distillation of caprolactam was introduced in the amount of 0.5 g / m. The gas stream treated with the proposed reagent, at a speed of 1 m / s, is fed to a laboratory electrostatic precipitator, the distance between the electrodes of which is 70 mm, and the voltage between the electrodes is 50 kV. With an initial dust content of 1.2 g / m1 of dust and gas flow, the dust content of the purified gas at the outlet of the electrostatic precipitator was 0.024 g / m1, which corresponds to a dust catch rate of 98%.

Treatment of the gases to be purified with a 1% sulphite liquor soda solution (prototype) with the same parameters allows to obtain a dust content of the gas to be purified 0.072 g / m1 or to obtain a dust trapping degree of 94%.

Example 2. In a dust-gas stream of ferrochromic production with an initial dust content of 2.2 g / m and a temperature of 00 ° C, a 1% solution of the vat residue of the distillation of caprolactam in the amount of 0.5 g / m is introduced. L

ate

SO JV

oh

SO JV

using a reagent at a speed of 1 m / s, is fed to a laboratory electrostatic precipitator, the distance between which electrodes is 70 mm, and the voltage between the electrodes is 50 kV. At an initial dust level of 2.2 i / m1, the dust content of the gas to be purified at the outlet from the electrostatic filter was 0.043 I / M. which corresponds to the degree of purification 1az 98% Treatment of the cleaned s with a 1% solution of smelt sulfite o liquor at the same parameters in the water, get dustiness of the cleaned 0.06 per hour or 97%

In the pre / post method, the cubic residue of the 1.1ITION ingiIa of caprolactam has a definite effect on the capture of item i and fofidizes the surface of the dust, replaces its electrical resistance. correct stress

The advantage of the method of purification of dust or dust compared with penetration is an increase in the degree of purification of dust and 98%, which allows spikes to enter the atmosphere

In addition, the proposed reagent eliminates equipment corrosion, is environmentally friendly, easy to handle and transport.

Formula and anniversary

1 method of cleaning the basics of dust in the electrostatic precipitator with a preliminary introduction to the cleaned the basics with temperature

100CC of an aqueous solution of a conditioning reagent, characterized in that, in order to increase the purity of a Gauv, a bottom residue from the distillation of caprolactam obtained during the production of caprolacam through cyclohexanone is used as a reagent.

2 Method according to, and I, characterized in that a bottom is used with a bare content of ingredients,%

Caprolactam920 Sodium salt of aminocaproic acid2347 Oliyum-ry Kanro

yyam2243

c: mole1319

5 Available NaOH1Л

0

Claims (2)

⁵ claims 1. The method of purification of gases from dust in an electrostatic precipitator with a preliminary introduction into the cleaned gases with temperature 10 100-150 ° С of an aqueous solution of a conditioning reagent, characterized in that, in order to increase the degree of gas purification, the distillation residue of caprolactam obtained during the production of caprolactam via cyclohexanone is used as a reagent. 2. The method according to π. 1, characterized in that the use of VAT residue at the following content of ingredients, wt.%: