Process for treating malodorous gases in sludge

A technology for odorous gas and treatment process, which is applied in the separation of dispersed particles, chemical instruments and methods, separation methods, etc., can solve problems such as inability to effectively treat odorous waste gas in sludge, and achieve the effect of prolonging service life and reducing costs.

Active Publication Date: 2013-09-04
杭州国泰环保科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention is proposed based on the deficiency that the malodorous waste gas in the sludge cannot be effectively treated in the existing gas

Method used

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  • Process for treating malodorous gases in sludge

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Embodiment 1

[0030] In this embodiment, the oxidizing agent is sodium hypochlorite, a mixed acid of sulfuric acid and hydrochloric acid (wherein sulfuric acid accounts for 60%, and hydrochloric acid accounts for 40%), and the alkaline absorbing liquid is sodium hydroxide.

[0031] A process for treating malodorous waste gas in sludge, comprising the following steps:

[0032] a. the sulfuric acid and hydrochloric acid mixed acid (wherein sulfuric acid accounts for 60% and hydrochloric acid accounts for 40%) with a concentration of 15% (calculated as sulfuric acid) 20 are delivered to the first nozzle 12 by the primary absorption circulation pump 2, and the first nozzle 12 will The mixed acid 20 is sprayed to the first packing layer 13, the mixed acid 20 trickles from top to bottom along the first packing layer 13 and falls to the bottom of the primary absorption tower 1, and the mixed acid 20 passes through the bottom of the primary absorption tower 1 again The primary absorption circulatio...

Embodiment 2

[0055] In this embodiment, the oxidizing agent is calcium hypochlorite, the acidic absorbing liquid is hydrochloric acid, and the alkaline absorbing liquid is sodium hydroxide.

[0056] The malodorous gas treatment process in the sludge includes the following steps:

[0057] a. Concentration is that the hydrochloric acid 20 of 10-30% is sent to the first nozzle 12 by the first pump 2, and the first nozzle 12 sprays the hydrochloric acid 20 to the first packing layer 13, and the hydrochloric acid 20 is along the first packing layer 13 from trickle from top to bottom and fall to the bottom of the primary absorption tower 1, the hydrochloric acid 20 is transported from the bottom of the primary absorption tower 1 to the first nozzle 12 again through the first pump 2, so that the hydrochloric acid 20 is recycled;

[0058] b. Calcium hypochlorite 10 is added into primary absorption tower 1 from medicament inlet 16, and calcium hypochlorite 10 reacts with hydrochloric acid 20 to pro...

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Abstract

The invention relates to a process for treating malodorous gases in sludge. The process comprises the following steps that: due to adoption of two-stage absorption manners in two absorption towers, gas passes through a first-stage absorption tower at first so as to enable alkaline waste gas, reductive waste gas and solid impurities in gas to be eliminated by using acid absorption liquid; then, gas passes through a second-stage absorption tower so as to enable residual little chlorine and acidic substances in gas to be absorbed by alkali absorption liquid; and finally, absorbed and purified gas is discharged through an exhaust pipe on the top of the second-stage absorption tower in a standard reaching manner. The process for treating malodorous gases in sludge disclosed by the invention is capable of effectively treating malodorous gases emitted from sludge, therefore, secondary pollution of waste gas to air is reduced; the living environment of people is greatly improved; and health of people gets a certain guarantee.

Description

technical field [0001] The invention relates to a gas treatment process, in particular to a process for the treatment of malodorous gas in sludge. Background technique [0002] The sludge produced by urban and industrial sewage treatment plants not only contains heavy metals and refractory organic matter, but also contains a large number of bacteria, fungi, protozoa, micro-metazoans, algae, viruses and other microorganisms. Corrosion and deterioration, and produce foul-smelling gas. The malodorous gas contains H 2 S, NH 3 , mercaptans, thioethers, dimethyl sulfide and organic amines. These malodorous gases are highly volatile, easy to diffuse, and have a pungent smell. Most of them are toxic to the human body and have adverse effects on the human respiratory system, digestive system, endocrine system, nervous system, and spirit. poisoning or even death. In order to protect and improve the sanitation quality of the sludge treatment site and the surrounding environment, a...

Claims

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Application Information

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IPC IPC(8): B01D53/75B01D53/78B01D53/58B01D53/48B01D53/52
Inventor 陈柏校夏玉坤俞洪春李林
Owner 杭州国泰环保科技股份有限公司
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