CN101224384A - Indoor air purification method for newly-decorated house - Google Patents

Abstract

The invention discloses a method for purifying indoor air of a new decorated house, which comprises the following steps: solid particles in indoor air are removed through cloth bag filtration, toxic and harmful gases generated by indoor decoration are thoroughly decomposed through heat accumulating type high-temperature thermal oxidation flameless combustion and high-temperature catalytic oxidation reaction, and the harmful gases on the decoration surface and inside building materials are accelerated to volatilize into the air through high-efficiency heat exchange and indoor air temperature rise, so that the indoor air is quickly and efficiently purified, and particularly the indoor air purification of newly-decorated houses is realized. The invention can overcome the general defects of the prior art, provides the method for purifying the indoor air of the newly decorated house, can quickly and conveniently solve the technical problem in the indoor air purification of the newly decorated house at present, is suitable for the indoor air purification of the newly decorated house, and has wide application prospect.

Description

A kind of indoor air purification method for newly decorated house

technical field

The invention relates to a method for quickly and effectively purifying indoor air through bag filtration-high-temperature flameless combustion-catalytic oxidation and decomposition of harmful gases, and belongs to the technical scope of controlling indoor air pollution in environmental governance. Specifically relates to an indoor air purification method for newly decorated houses, which is suitable for indoor air purification of newly decorated houses.

technical background

In recent years, due to the development of residential buildings to be highly closed and the extensive use of home decoration materials, the requirements for improving the air quality of living spaces are increasing. In terms of air quality, the demand is particularly large, and it is required to reduce the harmful components emitted by building materials and furniture in the newly decorated indoor environment.

For these requirements, it is customary to use adsorbents represented by activated carbon for deodorization, or to make the odor components chemically react with other chemical components to change the nature of the odor to reduce the odor, or to use ozone and photocatalyst technology to produce photochemical reactions. Reduce the concentration of odor, or take a long-term ventilation method of physical diffusion.

However, using adsorption technology for deodorization and removal of harmful components, the adsorption capacity of the adsorbent is limited, so it is essential to replace the deodorization filter when it is used for a long time. In addition, even within the life of the deodorization filter, there is a problem that the adsorbed components are released again at the end of the life to generate an odor.

On the other hand, the problems in the method of making the odor components react with other chemical components and changing the properties of the odor to reduce the odor are: after the chemical components are consumed, the absorbent must be replaced regularly; There are difficulties in controlling the relationship between emissions. For example, the invention patent "Absorptive Liquid Air Purifier (01121510.0)" uses four absorption reactors connected in series to remove harmful gases through physical and chemical methods. This method often requires replacement of the absorption liquid, and the absorption liquid needs to be reprocessed .

In addition, in order to decompose and remove harmful components such as formaldehyde, a catalytic reaction with a high oxidation-reduction potential must be performed, but there is a problem that the oxidative decomposition with ozone does not achieve complete decomposition, but stops at the middle of the decomposition of the product. stage, complete harmlessness cannot be achieved. For example, the invention patent "air purification device (02121697.5) and the utility model patent "an indoor air pollutant processor (02249215.1) use an ozone generator to quickly decompose harmful gases, but ozone has an impact on human health.

Harmful gas components are completely decomposed by irradiating a photocatalyst using titanium oxide with ultraviolet light. Conventionally, fluorescent lamps are used as ultraviolet light sources, and mercury is contained in the lamp tube, so there is a problem that the environmental load increases when the product is disposed of.

The problem in the application of the above-mentioned technology is that the release of harmful components emitted by building materials, furniture, etc. in the newly decorated indoor environment is slow. Nothing can be done.

Contents of the invention

In view of the above-mentioned problems, the present invention provides a method for removing solid particles in indoor air through bag filtration, and thoroughly decomposing toxic and harmful gases generated by interior decoration through high-temperature catalytic oxidation reaction, so as to quickly and efficiently purify indoor air, especially Air purification in the interior of a newly renovated house.

In order to achieve the above object, the present invention provides a method for quickly and efficiently purifying harmful gases in indoor air, the method comprising: bag filter to remove particulate matter in the air, high temperature flameless combustion thermal oxidation of organic matter in the air, catalytic oxidation and decomposition of residual organic matter , High-efficiency heat exchange and indoor temperature increase process, the specific steps are as follows:

Step 1, the induced draft fan sucks the polluted air into the filter cloth bag 1 in the air supply path, so as to remove the particles in the indoor air.

Step 2: The air after bag filter and dust removal is subjected to high-temperature oxidation and decomposition of toxic and harmful gases in the far-infrared porous ceramic plate electrothermal combustion device 2 under the action of the induced draft fan. High temperature oxidation adopts the principle of flameless combustion. The far-infrared porous ceramic plate electric heat storage type thermal oxidation burner is equipped with a resistance wire inside the far-infrared radiator of the burner (the surface of the metal plate has two kinds of far-infrared coating or ceramic treatment), and the heat from the resistance heating body The radiator is heated by heat transfer, and then far-infrared rays are radiated from the radiator. The shape of the porous ceramic plate regenerative thermal oxidation burner is a long cube, the hot gas passage between the radiant plates is 30mm, and the wind speed in the hot plate passage is maintained at 10-15m/sec. The temperature of the inner surface of the burner is between 450°C and 600°C. Most of the harmful gases such as volatile organic compounds (VOCs), benzene, formaldehyde, and ammonia in the indoor polluted air complete high-temperature oxidation during the process of passing through the burner. Decomposed into carbon dioxide and water.

Step 3: The rectangular metal honeycomb catalytic oxidation reactor 3 is located behind the porous ceramic plate electric heat storage type thermal oxidation burner, and the tail gas after high-temperature flameless combustion is then passed through the catalytic oxidation system to decompose residual toxic and harmful gases. The catalytic oxidation system uses noble metal platinum and palladium catalysts to catalytically oxidize (or reduce) volatile organic compounds (VOCs), benzene, formaldehyde, ammonia, etc. into carbon dioxide, nitrogen dioxide, sulfur dioxide, nitrogen and water.

Step 4: The high-efficiency heat exchanger 4 is arranged after the bag filter and dust removal device, and the waste heat discharged from the rectangular metal honeycomb catalytic oxidation reactor 3 is used to preheat the polluted air at the inlet. A high-efficiency heat exchanger is used to recover the reaction heat to heat the intake air. The hot exhaust gas discharged after heat exchange can quickly increase the indoor air temperature, and accelerate the volatilization of harmful gases on the decoration surface and inside the building materials into the air for easy removal.

The invention effectively overcomes the defects of the current indoor air purification method, and has the characteristics of active repair: high-temperature oxidation is rapid and thorough, and there is no secondary pollution problem; there is no strict selectivity for pollutants in the indoor air environment, and the pollutants in the air can be removed at the same time particulate matter, gaseous organic matter and microorganisms, etc.; the heating effect on indoor air actively promotes the accelerated volatilization and release of organic pollutants in indoor materials, which is beneficial to the control of pollution sources and the purification of pollutants in indoor air.

Description of drawings

Accompanying drawing 1 is the schematic diagram of the indoor air purification system of newly decorated house of the present invention.

Detailed ways

Below in conjunction with accompanying drawing 1 the present invention will be further described:

As shown in Figure 1, the bag filtration-the method for quickly and effectively purifying indoor air by high-temperature catalytic oxidation and decomposition of harmful gases involved in the technical solution of the present invention has: an induced draft fan, which is configured to filter in the air supply path of the induced draft fan Cloth bag 1, a heat exchange device 4 for air preheating arranged in the air supply path of the induced draft fan, and a far-infrared porous film for high-temperature oxidation and decomposition of toxic and harmful gases arranged in the air supply path of the induced draft fan A thermal oxidation combustion device 2 of a permanent ceramic plate electric heat storage type, and a device 3 for catalytically oxidizing and decomposing residual toxic and harmful gases arranged in the air supply path of the induced draft fan.

The method involved in the technology of the present invention The method for quickly and efficiently purifying indoor air of harmful gases involved in the present invention includes bag filtration-high temperature flameless combustion-catalytic oxidation decomposition-high-efficiency heat exchange and indoor temperature increase stage, the specific steps are as follows:

(1) Bag filter dust removal

The induced draft fan sucks polluted air into the filter cloth bag 1 in the air supply path to remove particulate matter in the indoor air.

(2) High temperature flameless combustion

The air after bag filter and dedusting is subjected to high-temperature oxidation and decomposition of toxic and harmful gases in the far-infrared porous ceramic plate electrothermal combustion device 2 under the action of the induced draft fan. The shape of the porous ceramic plate regenerative thermal oxidation burner is a long cube, the hot gas passage between the radiant plates is 30mm, and the wind speed in the hot plate passage is maintained at 10-15m/sec. The temperature of the inner surface of the burner is between 450°C and 600°C. Most of the harmful gases such as volatile organic compounds (VOCs), benzene, formaldehyde, and ammonia in the indoor polluted air complete high-temperature oxidation during the process of passing through the burner. Decomposed into carbon dioxide and water.

(3) Catalytic oxidation decomposition

The rectangular metal honeycomb catalytic oxidation reactor 3 is located behind the porous ceramic plate electric heat storage type thermal oxidation burner, and the tail gas after high-temperature flameless combustion is then passed through the catalytic oxidation system to decompose residual toxic and harmful gases. The catalytic oxidation system uses noble metal platinum and palladium catalysts to catalytically oxidize (or reduce) volatile organic compounds (VOCs), benzene, formaldehyde, ammonia, etc. into carbon dioxide, nitrogen dioxide, sulfur dioxide, nitrogen and water.

(4) Efficient heat exchange and indoor temperature increase

The high-efficiency heat exchanger 4 is arranged after the bag filter dust removal device, and uses the waste heat discharged from the rectangular metal honeycomb catalytic oxidation reactor 3 to preheat the polluted air at the inlet. A high-efficiency heat exchanger is used to recover the reaction heat to heat the intake air. The hot exhaust gas discharged after heat exchange can quickly increase the indoor air temperature, and accelerate the volatilization of harmful gases on the decoration surface and inside the building materials into the air for easy removal.

The present invention can overcome the general defects of the prior art, and provides a method for indoor air purification of newly decorated houses. The method can quickly and conveniently solve the technical problems in the current indoor air purification of newly decorated houses, and is suitable for indoor air purification of newly decorated houses. Air purification.

The present invention is simple and direct in technology, easy to operate and manage, low in capital investment and low in operating cost, so it is a feasible high-efficiency and low-consumption technology for indoor air purification of newly decorated houses, and has broad application prospects.

Claims (6)

1. one kind is used for the repair the house method of room inner air-cleaning of new clothes, and comprising: cloth bag filtration, the flameless combustion of heat accumulating type high-temperature thermal oxidation, catalytic oxidation decompose and heat exchange heats four-stage.The steps include:

(1) under the effect of air inducing fan, force air removes solid particulate matter in the room air by the cloth bag filtration in the suction chamber;

(2) toxic and harmful and the microorganism of the interior decoration generation behind the employing porous ceramics plate electric heating heat accumulation type thermal oxidation decomposition removal particle;

(3) thoroughly decompose the toxic and harmful that the reacted interior decoration of non-flaming combustion produces by the high-temperature catalytic oxidation reaction;

(4) adopt high-performance heat exchanger to reclaim reaction heat with heating air inlet, the hot exhaust gas of discharging after the heat exchange can improve indoor air temperature fast, and the pernicious gas that quickens finishing surface and building materials inside evaporate into and is beneficial in the air remove.

2. the repair the house method of room inner air-cleaning of new clothes according to claim 1, it is characterized in that: the air inducing fan is positioned at and filters after the cloth bag, filters cloth bag and is configured in the described air inducing fan air-supply path.

3. the repair the house method of room inner air-cleaning of new clothes according to claim 1, it is characterized in that: before the heat-exchanger rig that is used for air preheat was configured in far infrared porous ceramics plate electric heating heat accumulation type thermal oxidation burner in the described air inducing fan air-supply path, hot blast came from the honeycomb catalyst oxidation reactor.

4. the repair the house method of room inner air-cleaning of new clothes according to claim 1 is characterized in that: be used for the far infrared porous ceramics plate electric heating heat accumulation type thermal oxidation burner that high-temperature oxydation decomposes toxic and harmful and be configured in after the heat-exchanger rig of the air preheat in the described air inducing fan air-supply path.

5. the repair the house method of room inner air-cleaning of new clothes according to claim 1 is characterized in that: the honeycomb catalyst oxidation reactor is configured in after the far infrared porous ceramics plate electric heating heat accumulation type thermal oxidation burner in the described air inducing fan air-supply path.

6. the repair the house method of room inner air-cleaning of new clothes according to claim 1, it is characterized in that: the high-temperature tail gas after heat exchange is thrown in the room air with fan-shaped.

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