CN205308111U - Tobacco processing exhaust gas purification device - Google Patents

Abstract

The utility model relates to a tobacco processing exhaust gas purification device, including ozone generator, oxidation reaction unit, the spiral -flow type reactor, wet -type water spray set, shower, defroster, fan, ozone generator are connected to oxidation reaction unit, and oxidation reaction unit is connected to wet -type water spray set, and wet -type water spray set is connected to the fan. It realizes that the step is: ozone that tobacco waste gas and ozone generator produced is together carried to oxidation reaction unit and is mixed the reaction, and under the strong oxidation of ozone, stench molecule in the tobacco waste gas is most be small molecule substance by oxidative degradation, and a small amount of organic waste gas carries to wet -type water spray set, can further get rid of in the oxidation reaction unit the not waste gas of complete reaction, reaches odorless emission purpose. The utility model discloses oxidation to tobacco processing waste gas is efficient, small, with low costs.

Description

A tobacco processing waste gas purification device

technical field

The utility model relates to the field of environmental engineering waste gas treatment, in particular to a tobacco processing waste gas purification device.

Background technique

In the process of tobacco processing and production, various types of foreign matter are produced at various production points, with the characteristics of high moisture content, dust content, high temperature, and heavy odor. The main components contained in these malodorous exhaust gases are: phenol, solanone, damascenone, For furfural, toluene, methanol, ethanol, acetone, butane, acetic acid, etc., the treatment of this kind of malodorous exhaust gas has not been paid much attention. Some tobacco processing enterprises have also adopted corresponding treatment technologies, but it is difficult to meet the emission requirements of air pollutants And the emission requirements of odor pollutants are not compatible with people's growing environmental requirements.

At present, the common treatment methods of tobacco odor exhaust gas include biological method, plant essential oil masking method, adsorption method, low temperature plasma technology, and chemical oxidation method.

The biological method is to use a designated group of microorganisms to absorb and decompose the malodorous exhaust gas of tobacco, so that the odorous exhaust gas can be discharged up to the standard, but the growth of microorganisms requires suitable temperature, humidity, and nutritional conditions, which increases the operating cost, and in actual use, it will also be due to conditions. Improper control leads to the death of microorganisms, and the effect of tobacco waste gas treatment is poor.

Although the plant essential oil masking method can cover up the odor in a short period of time, it cannot remove the odor molecules from the source and cannot meet the control requirements of air pollutants.

The adsorption method uses a solid absorbent to absorb toxic and harmful components in the exhaust gas. The removal method is simple and the effect is remarkable. The dusty exhaust gas is easy to block the absorbent. The absorbent is prone to failure when the exhaust gas contains humidity, and regeneration is difficult. It is not suitable for dust. Treatment of wet exhaust gas.

Low-temperature plasma technology is a kind of treatment technology that is widely used in the domestic tobacco industry. It uses an external high-voltage and high-frequency alternating current to generate micro-discharges on the surface, which promotes the acceleration of free electrons in the electric field, and excites, dissociates, dissociates, combines or recombines with gases. and other reactions to generate highly active substances such as free radicals, ground state oxygen, and metastable oxygen, so as to oxidize and crack high-molecular organic matter in tobacco waste gas into small molecular substances to achieve the purpose of waste gas treatment. Due to the high moisture content and large dust content of tobacco waste gas, a thick layer of dust film is easily formed on the surface of the electrode, resulting in a decrease in the generation of highly active substances and a decrease in removal efficiency. At present, water spray technology is often used for subsequent treatment in industry, but the adsorption effect of water spray is limited, and the corresponding discharge requirements are often not met.

The chemical oxidation method uses a strong oxidant to oxidize odorous pollutants. The reaction conditions are easy to control and easy to operate. However, there are problems such as expensive oxidant, strong selectivity, and uneven mixing of oxidant and exhaust gas.

Contents of the invention

The purpose of the utility model is to overcome the problems of low removal efficiency, high cost and uneven mixing of oxidant and waste gas existing in the existing tobacco processing waste gas treatment technology, and provide a tobacco processing waste gas with simple structure, high removal efficiency and low cost Deodorization purification device.

The implementation of the utility model is a tobacco processing waste gas deodorization and purification device, which is characterized in that it includes an ozone generator, an oxidation reaction device, a swirling flow reactor, a wet water spray device, a spray pipe, and a demister , fan, the ozone generator is connected to the oxidation reaction device, the oxidation reaction device is connected to the wet water spray device, and the wet water spray device is connected to the fan to discharge.

Preferably, the oxidation reaction device is provided with a cyclone reactor.

Preferably, a spray pipe and a demister are arranged in the wet water spray device.

A realization method of a tobacco processing waste gas deodorization and purification device is:

(1) The ozone generator produces ozone, which is transported to the oxidation reaction device;

(2) The tobacco waste gas is passed into the oxidation reaction device, and the tobacco waste gas and the strong oxidizing agent ozone are mixed under the action of the cyclone reactor, and at the same time, most of the malodorous substances in the waste gas are oxidized and degraded;

(3) Pass the oxidized and degraded gas into the wet water spray device to absorb and degrade the organic waste gas that has not been completely oxidized;

(4) Exhaust the clean gas after passing through the wet water spray device through the fan.

The principle of the utility model is to pass ozone into the oxidation reaction device, which are highly oxidizing active particles, which can oxidize and degrade the malodorous molecules in the tobacco waste gas, so as to achieve the purpose of odorless emission. The malodorous exhaust gas molecules that have not been oxidized and decomposed by ozone can be completely removed by the wet water spray device, so that the tobacco exhaust gas can achieve the purpose of clean emission.

The beneficial effects of the utility model are: 1. The swirling flow reactor is adopted in the oxidation reaction device, so that the ozone is fully contacted with the tobacco waste gas, the volume of the oxidation reaction device is greatly reduced, and the problem of oxidant and oxidant in the existing processing device is solved. The problem of uneven mixing of exhaust gas, resulting in waste of oxidant and substandard exhaust gas discharge; 2. The design of wet water spray device solves the problem of limited selectivity for ozone treatment of odorous substances and incomplete treatment of exhaust gas. 3. The device of the utility model is simple, the removal efficiency of tobacco waste gas is high, and the cost is low.

Description of drawings

Fig. 1 is the structural representation of the utility model.

In the figure: 1-ozone generator, 2-oxidation reaction device, 3-swirl flow reactor, 4-wet water spray device, 5-spray pipe, 6-demister, 7-fan.

detailed description

Below in conjunction with accompanying drawing, the utility model is further described.

As shown in Figure 1, the utility model includes an ozone generator 1, an oxidation reaction device 2, a swirl reactor 3, a wet water spray device 4, a spray pipe 5, a mist eliminator 6, and a blower fan 7. The ozone generated by the ozone generator 1 is sent to the oxidation reaction device 2, and the tobacco waste gas is sent to the oxidation reaction device 2. The mixed flow of ozone and tobacco waste gas in the swirling flow reactor 3 in the oxidation reaction device 2 is sent to the wet water jet Shower device 4, clean gas is discharged through fan 7.

The tobacco waste gas and the ozone generated by the ozone generator are sent to the oxidation reaction device 2 together. The swirl reactor 3 in the oxidation reaction device 2 can evenly mix the ozone and the tobacco waste gas. Under the strong oxidation of the ozone, the stench in the tobacco waste gas Most of the molecules are oxidized and degraded into small molecular substances, and a small amount of organic waste gas is transported to the wet water spray device 4, which can further remove the incompletely reacted waste gas in the oxidation reaction device 2, and achieve the purpose of odorless emission. The spray water generated by the spray pipe 5 absorbs the degradation waste gas, then the moisture in the flue gas is removed through the mist eliminator 6 , and finally the clean gas is discharged through the fan 7 .

The above is only a brief description of the embodiments of the present utility model, and is not a limitation of the present utility model. It can have many deformations. Any deformation performed by technical personnel of the same profession according to the present utility model is considered to belong to the present utility model. protected range.

Claims (2)

1. A tobacco processing exhaust gas purification device, characterized in that: comprise an ozone generator, an oxidation reaction device, a swirl reactor, a wet water spray device, a spray pipe, a demister, and a blower fan; The device is connected to the oxidation reaction device, the oxidation reaction device is connected to the wet water spray device, and the wet water spray device is connected to the fan outlet; the oxidation reaction device is equipped with Cyclone reactor. 2. The device for purifying tobacco processing waste gas according to claim 1, characterized in that, the wet water spray device is provided with a spray pipe and a demister.