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Indoor formaldehyde degradation device

A technology for formaldehyde degradation and formaldehyde, applied in the direction of separation methods, dispersed particle separation, chemical instruments and methods, etc., can solve the problems of troublesome degradation of formaldehyde, large consumption of chemicals, and low amount of formaldehyde dissolved, so as to improve the absorption capacity and increase the use of The effect of aging and increasing the degree of beauty

Active Publication Date: 2019-08-30
QINGDAO TECHNOLOGICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the commonly used formaldehyde removal methods mainly include physical adsorption method, chemical method and microbial method: physical adsorption method is mainly activated carbon adsorption method, although it can absorb formaldehyde, but there are also defects. The range of passive adsorption of activated carbon to formaldehyde is limited and the efficiency is low. If the repeated use operation is troublesome and the purpose of degrading formaldehyde cannot be achieved only by absorbing formaldehyde; the chemical method degrades formaldehyde faster, but the consumption of chemicals is large, the cost is high, the replacement is troublesome, and there is a possibility of producing other pollutants that are more difficult to degrade The microbial method is an emerging formaldehyde treatment method, which has the advantages of low operating costs and no secondary pollution, but there are problems such as direct aeration with less dissolved formaldehyde, poor degradation efficiency, and long degradation time.

Method used

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Experimental program
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Embodiment 1

[0020] The main structure of the indoor formaldehyde degradation device involved in this embodiment includes a reaction vessel 1, a first vent 2, an activated carbon carrier 3, a partition 4, a cover 5, an upper chamber 6, a lower chamber 7, and a second vent 8 , baffle plate 9, air pump 10, ventilation pipeline 11, ultrasonic generator 12, microbial carrier 13, biofilm 14, liquid culture medium 15, upper communication pipeline 16, lower communication pipeline 17, screen 18, water pump 19 and check valve 20; The top side wall of the reaction vessel 1 with an inner hollow structure is provided with first vents 2 arranged in pairs, and an activated carbon carrier 3 is arranged below the first vents 2 in the reaction vessel 1, and the activated carbon carrier 3 in the reaction vessel 1 The bottom of the upper chamber is divided into an upper chamber 6 and a lower chamber 7 by a partition plate 4 and a cover plate 5, the cover plate 5 is fixedly connected with the reaction vessel 1...

Embodiment 2

[0023] When the indoor formaldehyde degradation device involved in this embodiment is in use, the air pump 10 draws the indoor air containing formaldehyde into the upper chamber 6 through the vent pipe 11, and the ultrasonic generator 12 works intermittently to shatter the water molecules in the upper chamber 6, Formaldehyde and water molecule contact and fuse in a large area, so that the liquid culture medium 15 in the upper chamber 6 contains sufficient formaldehyde, and at the same time, the liquid culture medium 15 in the upper chamber 6 flows into the lower chamber 7 through the upper communication pipe 16, so that Formaldehyde enters the lower chamber 7. The formaldehyde stays on the microbial carrier 13 and the biofilm 14 and is degraded. The degraded gas is transported to the upper chamber 6 through the water pump 19 and the communication pipe 17, and passes through the second vent 8 and the activated carbon carrier in turn. 3 and the first vent 2 enter the room, wherei...

Embodiment 3

[0025] The indoor formaldehyde degradation device involved in this embodiment adopts ultrasonic generator 12 aeration and the formaldehyde degradation device in the prior art adopts direct aeration to dissolve the formaldehyde that concentration is 3.0mg / L respectively, utilizes the formaldehyde that high performance liquid chromatography measures to dissolve rate as image 3 Shown, the formaldehyde dissolution rate of ultrasonic generator 12 aeration is higher than the formaldehyde dissolution rate of direct aeration; When the frequency of ultrasonic generator 12 is 40KHz, the formaldehyde dissolution rate is maximum; Ultrasonic generator 12 has deactivation effect to formaldehyde-reducing bacteria , the calculation formula of the sample microbial inactivation rate (i) under different ultrasonic conditions is: i=(1-Nt / N0) × 100%, wherein, Nt is the number of microbial colonies in the water sample after ultrasonic treatment, cfu / mL; N0 is the number of microbial colonies in th...

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Abstract

The invention belongs to the technical field of air purification equipment, and relates to an indoor formaldehyde degradation device. The device is based on microbial degradation of harmful gas formaldehyde in indoor air, is provided with an ultrasonic generator, and uses low-intensity ultrasonic waves to break water molecules; formaldehyde is dissolved in water, and then is efficiently degraded by a formaldehyde-degrading strain, and allows formaldehyde in the air is dissolved in a liquid medium at the maximum efficiency to maximize the dissolution of formaldehyde. The formaldehyde-degradingstrain taking formaldehyde as a sole carbon source and nitrogen source and growing on a biofilm is utilized to degrade formaldehyde and maximize the degradation of formaldehyde; the device has the advantages of simple structure, convenience in use, low cost, and high operability and practicability, can effectively adsorb and degrade indoor formaldehyde, improve the dissolution rate and the degradation rate of formaldehyde and purify other pollutants in the air, degrades indoor formaldehyde at the highest efficiency, improves indoor air quality, and has great practical significance and use value.

Description

[0001] Technical field: [0002] The invention belongs to the technical field of air purification equipment, and relates to an indoor formaldehyde degradation device, which degrades harmful gas formaldehyde in indoor air based on microorganisms. [0003] Background technique: [0004] In recent years, the situation of indoor air pollution in our country is astonishing, and the threat of indoor air pollution to human health is shocking, among which formaldehyde has become an "invisible killer" of health. The China Consumers Association announced the results of a survey: 70% of the newly renovated houses were sampled and tested to contain toxic gases, and indoor formaldehyde in newly decorated houses exceeded the standard by more than 75%, and some concentrations could even reach 3.0mg / L. Beijing tested the indoor environmental pollutants of 30 households after decoration, and found that the concentration of formaldehyde exceeded the standard by 73%. Hangzhou tested the indoor en...

Claims

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Application Information

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IPC IPC(8): B01D53/84B01D53/72
CPCB01D53/84B01D53/72B01D2258/06Y02A50/20
Inventor 徐爱玲李慧娟乔凤禄袁小懿李英杰
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
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