CN212068205U - Waterproofing membrane workshop exhaust treatment system - Google Patents

Abstract

The utility model relates to a waste gas treatment system of a waterproof coiled material workshop, which comprises a primary treatment device for primarily treating dust and oil mist in asphalt forming flue gas and a batching flue gas pretreatment device for primarily treating batching asphalt flue gas; the rear parts of the primary treatment device and the batching flue gas pretreatment device are sequentially connected with a high-voltage electrostatic tar precipitator, a mechanical demister, a plasma purifier and an active carbon adsorption tower. The utility model discloses a pitch shaping flue gas processing system, pitch shaping flue gas and batching pitch flue gas are respectively through dust solid, liquid particle and oil mist in preliminary treatment device and the batching flue gas preprocessing device preliminary treatment pitch flue gas, then recycle high-pressure static and catch tar ware and get rid of dust and tar in the flue gas, further get rid of smog, toxic substance and toxic gas respectively through mechanical defroster, plasma purifier and active carbon adsorption tower again to make the pollutant degrade and get rid of, discharge clean air.

Description

Waterproofing membrane workshop exhaust treatment system

Technical Field

The utility model relates to a pitch exhaust-gas treatment technical field, concretely relates to waterproofing membrane workshop exhaust-gas treatment system.

Background

The waterproof coiled material is a commonly used waterproof material in the field of buildings, and can be used for waterproofing work of roofs, pipelines, pools and the like. The waterproof roll generally uses a PE film (polyethylene film) or a PET film (polyester film) as an upper surface material, and the formed asphalt is coated between two surface materials. During the process of preparing asphalt, a large amount of asphalt fumes (exhaust gas) is generated. Most enterprises generally adopt a common organic waste gas activated carbon adsorption tower to adsorb the generated asphalt smoke. However, the organic waste gas activated carbon adsorption tower can only adsorb organic waste gas, but both solid and liquid particles formed by condensing asphalt volatile components and organic matters in a steam state exist in asphalt smoke, and part of the organic matters are high molecular polymers, so that the environment is seriously polluted. The asphalt smoke contains various organic matters including carbocyclic hydrocarbon, cyclic hydrocarbon derivatives and other compounds, and also contains various polycyclic aromatic hydrocarbon substances such as benzopyrene, benzanthracene, carbazole and the like, most of which are carcinogenic and strong carcinogenic substances, and can be absorbed into human bodies through respiratory tracts. In addition, the asphalt smoke is characterized by easy adhesion and easy burning and explosion above a certain temperature. During the process of collecting, conveying and eliminating smoke, the asphalt is easy to adhere to the surface of the pipeline and the equipment to form liquid to solid asphalt. The solidified asphalt is difficult to remove, and pipeline blockage and equipment damage are often caused, so that the system cannot normally run.

In addition, because the required pitch of waterproofing membrane need add batching such as synthetic rubber, the exhaust gas of batching preparation mechanism not only contains great dust, and can be adulterated with the pitch flue gas, and ordinary waterproofing membrane's production facility only carries out dust removal treatment to the exhaust gas of batching preparation mechanism, does not handle the pitch flue gas of adulteration wherein. How to design a device which can effectively remove solid, liquid particles, organic waste gas and other toxic substances in asphalt smoke generated in the whole waterproof coiled material production and discharge clean air becomes a technical problem which is urgently needed to be solved by waterproof coiled material manufacturing enterprises.

Disclosure of Invention

The utility model aims at solving the not enough of prior art, provide a waste gas treatment system that is used for waterproofing membrane workshop and can effective clean waterproofing membrane workshop exhaust pitch waste gas.

The utility model adopts the technical proposal that: the waste gas treatment system of the waterproof coiled material workshop comprises a primary treatment device for primarily treating dust and oil mist in asphalt forming flue gas and a batching flue gas pretreatment device for primarily treating batching asphalt flue gas; the rear parts of the primary treatment device and the batching flue gas pretreatment device are sequentially connected with a high-voltage electrostatic tar precipitator, a mechanical demister, a plasma purifier and an active carbon adsorption tower.

Preferably, the preliminary treatment device comprises a first cyclone dust collector, a first spray tower and a first oil mist filter which are connected in sequence.

Preferably, the air inlet of the first cyclone dust collector is provided with an air inlet pipe connected with the asphalt forming equipment.

Preferably, the air outlet of the first oil mist filter is connected with a first fan which sends the primarily treated asphalt forming flue gas to a high-voltage electrostatic tar precipitator.

Preferably, the batching flue gas pretreatment device comprises a second cyclone dust collector, a third cyclone dust collector, a second spray tower, a third spray tower, a fourth spray tower and a second oil mist filter which are connected in sequence.

Preferably, the air outlet of the second oil mist filter is connected with a second fan which sends the primarily treated ingredient asphalt smoke to a high-voltage electrostatic tar precipitator

Preferably, the high-voltage electrostatic tar precipitator comprises a body system and an electrical system.

Preferably, the electrical system comprises a control cabinet, a high-voltage electrostatic silicon rectifier and a corona electrode system.

Preferably, the middle part of the body system is provided with a sedimentation stage section.

Compared with the prior art, the utility model has the following advantage: the utility model discloses a pitch shaping flue gas processing system, pitch shaping flue gas and batching pitch flue gas are respectively through dust solid, liquid particle and oil mist in preliminary treatment device and the batching flue gas preprocessing device preliminary treatment pitch flue gas, then recycle high-pressure static and catch tar ware and get rid of dust and tar in the flue gas, further get rid of smog, toxic substance and toxic gas respectively through mechanical defroster, plasma purifier and active carbon adsorption tower again to make the pollutant degrade and get rid of, discharge clean air.

Drawings

Fig. 1 is a schematic view of the structure process of the present invention.

The numbers in the figures indicate:

1-a primary treatment device, 11-a first cyclone dust collector, 12-a first spray tower, 13-a first oil mist filter, 14-an air inlet pipe, 15-a first fan, 2-a high-voltage electrostatic tar precipitator, 3-a mechanical demister, 4-a plasma purifier, 5-an activated carbon adsorption tower, 6-a burdening flue gas pretreatment device, 61-a second cyclone dust collector, 62-a third cyclone dust collector, 63-a second spray tower, 64-a third spray tower, 65-a fourth spray tower, 66-a second oil mist filter and 67-a second fan.

The specific implementation mode is as follows:

in order to enhance the understanding of the present invention, the following detailed description will be made in conjunction with the embodiments and the accompanying drawings. The utility model discloses the accessible is implemented as follows:

referring to fig. 1, the waste gas treatment system of the waterproof coiled material workshop comprises a primary treatment device 1 for primarily treating dust and oil mist in asphalt forming flue gas and a batching flue gas pretreatment device 6 for primarily treating batching asphalt flue gas; the rear parts of the primary treatment device 1 and the batching flue gas pretreatment device 6 are sequentially connected with a high-voltage electrostatic tar precipitator 2, a mechanical demister 3, a plasma purifier 4 and an active carbon adsorption tower 5. The asphalt forming flue gas and the batching asphalt flue gas are respectively pretreated by a primary treatment device 1 and a batching flue gas pretreatment device 6, then sequentially treated by a high-voltage electrostatic tar precipitator 2, a mechanical demister 3, a plasma purifier 4 and an activated carbon adsorption tower 5, and finally discharged with clean air through an evacuation chimney by a fan, wherein the path is shown by an arrow in figure 1.

The primary treatment device 1 comprises a first cyclone dust collector 11, a first spray tower 12 and a first oil mist filter 13 which are connected in sequence, and respectively and primarily treats dust solid, liquid particles and oil mist in the asphalt smoke. And the air inlet of the first cyclone dust collector 11 is provided with an air inlet pipe 14 connected with asphalt molding equipment. The gas outlet of the first oil mist filter 13 is connected with a first fan 15 which sends the primarily treated asphalt forming flue gas to the high-voltage electrostatic tar precipitator 2. Asphalt flue gas discharged by asphalt forming equipment sequentially enters a first cyclone dust collector 11, a first spray tower 12 and a first oil mist filter 13 through an air inlet pipe 14, and then enters a high-voltage electrostatic tar precipitator 2 through a first fan 15.

The pretreatment device 6 for the dosing flue gas comprises a second cyclone dust collector 61, a third cyclone dust collector 62, a second spray tower 63, a third spray tower 64, a fourth spray tower 65 and a second oil mist filter 66 which are connected in sequence. Because the preparation process of the ingredient preparation mechanism needs the processes of stirring, shearing and grinding, the ingredient preparation mechanism not only contains larger dust, but also can be doped with asphalt smoke. The batching pitch flue gas of collection through setting up two cyclone, three spray column, can effectively get rid of more dust particle in the waste gas, improves purification efficiency. The air outlet of the second oil mist filter 66 is connected with a second fan 67 which sends the primarily processed ingredient asphalt smoke to the high-voltage electrostatic tar precipitator 2.

The waste gas collected after the primary treatment of the primary treatment device 1 and the batching flue gas pretreatment device 6 enters the high-voltage electrostatic tar precipitator 2, when the flue gas passes through, dust and tar in the flue gas are ionized under the action of charges, move to a metal wire with charges and a pipe wall, lose the charges, fall to the bottom of the high-voltage electrostatic tar precipitator 2 under the action of gravity and flow out, and therefore pollutants are degraded and removed. The high-voltage electrostatic tar precipitator 2 is based on the principle that high-voltage direct current is applied between a metal wire and a metal pipe wall (or an electrode plate) to maintain an electric field which is enough to ionize gas, so that a corona region is formed between a cathode and an anode. According to the electric field theory, positive ions are adsorbed on a corona electrode with negative electricity, and negative ions are adsorbed on a precipitation electrode with positive electricity; all ionized positive and negative ions fill the entire space between the corona and precipitation electrodes. When gas containing impurities such as tar droplets passes through the electric field, the impurities adsorbing negative ions and electrons move to the precipitation electrode under the action of coulomb force of the electric field to release charges, and are adsorbed on the precipitation electrode, so that the aim of purifying the gas is fulfilled, which is generally called as a charging phenomenon. When the amount of impurities adsorbed on the precipitation electrode is increased to be larger than the adhesive force of the precipitation electrode, the impurities automatically flow downwards and are discharged from the bottom of the high-voltage electrostatic tar precipitator 2, and the clean gas leaves from the upper part of the ionization catcher and enters the next process.

The high-voltage electrostatic tar precipitator 2 comprises a body system and an electrical system.

The electric system comprises a control cabinet, a high-voltage electrostatic silicon rectifier and a corona electrode system. The control cabinet is a high-voltage electric control cabinet, is a control center of the high-voltage electrostatic tar precipitator 2, and is used for completing power supply input, working voltage adjustment and output, operation fault alarm and automatic removal by components in the cabinet and knobs and buttons on a panel, and the operation state is displayed by instruments and indicator lamps. The high-voltage electrostatic silicon rectifier boosts and rectifies the alternating-current voltage output by the control cabinet into direct-current high voltage, and then outputs the direct-current high voltage to the corona electrode system. The main part of the corona electrode system is a corona wire and consists of a high-voltage porcelain insulator, a suspension rod, an upper umbrella ring, a lower umbrella ring, a heavy hammer and the like, and the corona electrode system is arranged in a tar removing tower body. When the corona wire is connected with high voltage, a strong high-voltage electric field is generated, and the surrounding gas medium is ionized to generate electric charges, so that the mixture of tar, water mist, dust and the like in the medium is charged with negative electricity.

The body system is a core component for removing tar, and the corona electrode system is uniformly arranged in each layer of the tower body. The middle part of the body system is provided with a precipitation stage section. When the flue gas is fed into the lower part of the tower body from the gas inlet and passes through the gas distribution plate, the flue gas flows upwards through the middle precipitation electrode section, the mixture of tar, water mist, dust and the like with negative electricity flows upwards, the mixture with negative electricity is absorbed and caught by the precipitation electrode (positive electrode) under the action of the attraction force of a high-voltage electric field in the section and is collected on the polar plate, the mixture falls down along the polar plate under the action of the self gravity, the mixture is periodically discharged, and the purified waste gas escapes from the gas outlet at the upper part of the tower body.

The flue gas treated by the high-voltage electrostatic tar precipitator 2 also contains a small amount of liquid foam. The mechanical demister 3 can filter out not only larger liquid foam suspended in the air flow, but also smaller and tiny liquid foam. The operating principle of the mechanical demister 3 is gravity and inertial impact, and when the gas containing mist passes through the demister at a certain speed, the gas can collide with the internal structure of the demister and adhere to the surface of the demister. Mist foam on the surface of the inner structure of the demister can be gradually gathered under the action of diffusion and gravity, and when the weight reaches a certain level, the mist foam can be separated from the inner structure of the demister.

After the asphalt forming flue gas treated by the mechanical demister 3 enters the plasma purifier 4, under the action of an external electric field, a large amount of energy-carrying electrons generated by medium discharge bombard pollutant molecules of the asphalt forming flue gas to ionize, dissociate and excite the pollutant molecules, and then a series of complex physical and chemical reactions are initiated to convert complex macromolecular pollutants into simple micromolecular safe substances or convert toxic and harmful substances into substances which are nontoxic, harmless or low-toxic and low-harmful, so that the pollutants are degraded and removed.

The asphalt forming flue gas purified by the plasma purifier 4 finally enters an activated carbon adsorption tower 5, and is used for adsorbing organic steam such as aldehydes, phenols, alcohols, olefins and the like which are remained in the asphalt forming flue gas, and simultaneously adsorbing inorganic gases (such as No, N, S, S, HF, HCL and the like) and also adsorbing oil mist.

The utility model discloses a pitch shaping flue gas processing system can effectively get rid of solid, liquid particle, organic waste gas and other noxious material in the pitch flue gas, and the clean air of discharge is fit for wide application and popularization.

Finally, it should be noted that: the above description is only for the preferred embodiment of the present invention and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (9)

1. The waste gas treatment system of the waterproof coiled material workshop is characterized by comprising a primary treatment device (1) for primarily treating dust and oil mist in asphalt forming flue gas and a batching flue gas pretreatment device (6) for primarily treating batching asphalt flue gas; the device is characterized in that a high-voltage electrostatic tar precipitator (2), a mechanical demister (3), a plasma purifier (4) and an active carbon adsorption tower (5) are sequentially connected behind the primary treatment device (1) and the batching flue gas pretreatment device (6).

2. The waterproofing membrane workshop waste gas treatment system according to claim 1, wherein the primary treatment device (1) comprises a first cyclone (11), a first spray tower (12), and a first oil mist filter (13) connected in sequence.

3. Waterproofing membrane workshop exhaust gas treatment system according to claim 2, wherein the air inlet of the first cyclone (11) is provided with an air inlet pipe (14) connected to an asphalt forming device.

4. The waste gas treatment system of the waterproof coiled material workshop according to claim 3, wherein the gas outlet of the first oil mist filter (13) is connected with a first fan (15) which sends the primarily treated asphalt forming flue gas to the high-voltage electrostatic tar precipitator (2).

5. The waste gas treatment system of the waterproof coil workshop as claimed in claim 1, wherein the batching flue gas pretreatment device (6) comprises a second cyclone dust collector (61), a third cyclone dust collector (62), a second spray tower (63), a third spray tower (64), a fourth spray tower (65) and a second oil mist filter (66) which are connected in sequence.

6. A waterproofing membrane workshop waste gas treatment system according to claim 5 wherein the second oil mist filter (66) has an outlet connected to a second fan (67) which delivers pre-treated furnish asphalt flue gas to the high voltage electrostatic tar precipitator (2).

7. Waterproofing membrane plant waste gas treatment system according to any of claims 1 to 6, wherein the high voltage electrostatic tar trap (2) comprises a body system and an electrical system.

8. The waterproofing membrane workshop exhaust gas treatment system of claim 7 wherein the electrical system comprises a control cabinet, a high voltage electrostatic silicon rectifier and a corona electrode system.

9. The waterproofing membrane plant exhaust gas treatment system according to claim 8 wherein the body system is provided with a settling stage section in the middle.

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