CN207024927U - Industrial VOC waste gas catalytic combustion treatment system - Google Patents

Abstract

The utility model discloses an industry VOC waste gas catalytic combustion processing system, including spraying processing module, dry module and catalytic combustor, exhaust gas discharge pipe with it connects to spray processing module, spray processing module with the dry access connection of dry module, dry module with catalytic combustor connects, catalytic combustor's emission flue gas pipe and emission house steward are connected, emission house steward be provided with a branch pipeline with dry module's heat source interface connection. Has the advantages and beneficial technical effects as follows: the spraying treatment module is used for desulfurization and removal of large particles, so that the emission of flue gas and dust is reduced; the waste gas after spraying treatment is dried by recycled flue gas and then enters the catalytic combustor for combustion and decomposition, so that the treatment burden of the catalytic combustor can be reduced, and the combustion effect is improved; the full recycle combustion chamber discharges the heat, and energy-conserving effect is obvious, and VOC is completely by burning degradation, does not cause the pollution to the environment again.

Description

Industrial VOC waste gas catalytic combustion treatment system

【Technical field】

The utility model relates to a waste gas treatment device, in particular to an industrial VOC waste gas catalytic combustion treatment system.

【Background technique】

The drying kiln can be used to heat and dry the paint and coating on the surface of the workpiece. During the high-temperature treatment of the workpiece, the volatile organic compound (VOC) gas in the workpiece is directly discharged into the environment along with the exhaust gas, which will cause serious pollution to the environment and cause physical damage to the staff and residents in the area.

At present, the industry mainly adopts condensation method, adsorption-vacuum desorption post-absorption method, combustion method, membrane separation and other treatment methods. The existing organic waste gas treatment methods are single and complex in structure. Either the treatment effect is poor, or most of the energy is consumed. Increase processing costs.

【Content of utility model】

The purpose of this utility model is to address the shortcomings of the above-mentioned existing technologies, and to provide a catalytic combustion treatment system for industrial VOC waste gas that can greatly eliminate volatile organic compound (VOC) gas emission pollution, has a simple structure, energy saving, high efficiency, and is more environmentally friendly .

In order to achieve the above object, the utility model is achieved in this way: the industrial VOC waste gas catalytic combustion treatment system includes a spray treatment module, a drying module and a catalytic burner, the exhaust gas discharge pipe is connected with the spray treatment module, and the spray treatment module The processing module is connected to the drying channel of the drying module, the drying module is connected to the catalytic burner, the exhaust gas pipe of the catalytic burner is connected to the discharge main pipe, and the discharge main pipe is provided with a branch pipeline connected to the The heat source interface connection of the drying module described above.

The spray treatment module includes a treatment tower, and at least one humidification treatment chamber and a secondary dust removal chamber are arranged in sequence from bottom to top in the treatment tower, and a filter filler is arranged between the humidification treatment chamber and the secondary dust removal chamber Layers are separated; a first spray device is set in the secondary dust removal chamber, and the first spray device is installed above the secondary dust removal chamber; the treatment tower is provided with a flue gas inlet and a gas outlet, so The flue gas inlet is connected to the humidification treatment chamber, the gas outlet is connected to the secondary dust removal chamber, a second spray device is arranged on the humidification treatment chamber, and a treatment liquid pool is arranged at the bottom of the treatment tower. The second spraying device is connected to the treatment liquid pool through a delivery pipe through a water pump.

The first spraying device or the second spraying device includes a spiral coil pipe arranged in the secondary dust removal chamber or humidification treatment chamber, and several spray heads are arranged on the spiral coil pipe, which can make the flue gas and The treatment liquid is sprayed for effective contact to remove sulfide and nitrogen oxides in the flue gas to the greatest extent.

The humidification treatment chamber is arranged in stages, and the humidification treatment chamber is divided into at least two sub-humidification treatment chambers through the auxiliary filter packing layer; .

Compared with the prior art, the utility model has the advantages and beneficial technical effects as follows: all the high-temperature flue gas containing VOC gas is desulfurized and removes large particles through the spray treatment module, reducing the emission of flue gas dust; The exhaust gas after leaching treatment is dried with the recycled flue gas and then enters the catalytic burner for combustion and decomposition, which can reduce the processing burden of the catalytic burner and improve the combustion effect; fully recover and utilize the heat emitted by the combustion chamber, the energy saving effect is obvious, and VOC is completely eliminated Combustion degradation, no pollution to the environment.

【Description of drawings】

Fig. 1 is the system flowchart of industrial VOC waste gas catalytic combustion treatment system of the present utility model;

Fig. 2 is a schematic structural diagram of the spray treatment module in the industrial VOC waste gas catalytic combustion treatment system of the present invention.

【detailed description】

The utility model is described in detail below in conjunction with the accompanying drawings and specific embodiments.

The industrial VOC waste gas catalytic combustion treatment system, as shown in Figure 1, includes a spray treatment module 2, a drying module 7 and a catalytic burner 6, and the exhaust gas discharge pipe 1 of the spraying workshop such as furniture is connected with the spray treatment module 2. It is used to treat possible sulfides and remove large particles; the spray treatment module 2 is connected to the drying channel of the drying module 7, and is used to dry the exhaust gas after the spray treatment, so as to reduce the processing burden of the catalytic burner, Improve combustion effect. The drying module 7 is connected to the catalytic burner 6 , the flue gas exhaust pipe of the catalytic burner 6 is connected to the discharge main pipe, and the discharge main pipe is provided with a branch pipeline connected to the heat source interface of the drying module 7 . A regulating valve is set between the drying module 7 and the connecting pipeline of the catalytic burner 6. A smoke distribution box 14 is arranged on the discharge main pipe, and the branch pipeline is connected with the smoke distribution box 14 .

The catalytic burner can be a photocatalytic burner, and can directly purchase a mature product sold in the market, which mainly utilizes the photocatalyst titanium dioxide (TiO2) to absorb the light energy of external radiation and convert it directly into chemical energy. Some organic substances that are difficult to be oxidized by ozone, such as chloroform, carbon tetrachloride, and hexachlorobenzene, can be effectively decomposed, so it has special significance for organic substances that are difficult to degrade. The effective oxidant for photocatalysis is hydroxyl radicals (HO ), the oxidation of hydroxyl radicals (HO) is higher than that of common ozone, hydrogen peroxide, potassium permanganate, hypochlorous acid, etc.

The drying module 7 is a heat exchanger, which includes a drying channel and a heat exchange channel, the drying channel is connected to the outlet of the spray treatment module 2, and the heat exchange channel is connected to the branch pipeline for Recycling exhaust waste heat to dry exhaust gas, energy saving, and the effect is obvious.

The spray treatment module, as shown in Figure 2, includes a treatment tower, in which at least one humidification treatment chamber 11 and a secondary dedusting chamber 12 are sequentially arranged from bottom to top in the treatment tower, and the humidification treatment chamber 11 There is a filter packing layer 13 between the secondary dust removal chamber 12; a first spray device 53 is arranged in the secondary dust removal chamber 12, and the first spray device 53 is installed in the secondary dust removal chamber 12 above; the first spraying device 53 includes a spiral coil tube with the secondary dust removal chamber, and several shower heads are arranged on the spiral coil tube, and the first spraying device 53 passes through the conveying pipe and the first The water pump 52 is connected to the water storage tank 51; the side wall of the treatment tower is provided with a flue gas inlet near the bottom to connect with the exhaust gas discharge pipe 1, the bottom is provided with a drain port 16, and the top of the upper part is provided with an air outlet, and the flue gas inlet is connected to the humidification treatment chamber 11. The air outlet communicates with the secondary dust removal chamber. A treatment liquid pool 41 is provided at the bottom of the treatment tower for collecting the treatment liquid flowing down from the water outlet 16 . The drain port 16 can be placed below the liquid level in the treatment liquid pool 41, so as to avoid the overflow of flue gas. The upper part of the humidification treatment chamber 11 is provided with a second spray device 43, and the second spray device 43 is connected to the treatment liquid pool 41 through a delivery pipe through a second water pump 42 to recycle the treatment in the treatment liquid pool 41. The liquid sprays the flue gas entering from the flue gas inlet with a water bath to effectively remove sulfide and active nitrogen oxides in the flue gas. The spraying device 43 includes a spiral coil in the humidification treatment chamber 11, and a number of spray heads are arranged on the spiral coil, so that the smoke can be effectively contacted with the spray of the treatment liquid, and the dust in the smoke can be removed to the greatest extent. Sulfides and nitrogen oxides.

Wherein, the treatment liquid pool 41 is filled with a recyclable treatment liquid, and the treatment liquid may be an alkali solution, preferably lime water. A water level monitoring sensor is provided in the treatment liquid pool 41, and when the water level of the treatment liquid in the treatment liquid pool 41 drops to a certain level, an alarm is issued or a treatment liquid is added.

The thickness of the filter packing layer 13 is 25-40 cm, which is fixed on the side wall of the treatment tower. The filter packing layer 13 is filled with Raschig rings. The size of the Raschig ring is 36mm-40mm. The ceramic Raschig ring is preferred, the ceramic wall thickness is 4mm-8mm, the price is low, and the filtering effect is obvious. Most preferably, the thickness of the filter packing layer 13 is 33-36 cm.

For the spray treatment module, on the basis of the above, the humidification treatment chamber 11 is arranged in stages, and the inside of the humidification treatment chamber 11 is divided into at least two sub-humidification treatment chambers (one sub-humidification treatment chamber) by auxiliary filter packing layer 15 chamber and secondary sub-humidification treatment chamber). The spraying devices 43 are respectively arranged in the first-level sub-humidification treatment chamber and the second-level sub-humidification treatment chamber. The flue gas is first sprayed through the primary humidification treatment chamber, then filtered through the auxiliary filter packing layer 15, and then enters the secondary humidification treatment chamber for spray treatment, then humidified through the filter packing layer 13, and then enters the secondary dust removal chamber 12 for dust removal deal with.

The auxiliary filter packing layer 15 has a thickness of 16-25 cm, and is fixed on the side wall of the treatment tower. Pall rings are filled in the auxiliary filter packing layer 15 . Using the Pall ring can effectively save 20%-40% of packing volume. Most preferably, the thickness of the filter packing layer 13 is 17-23 cm.

The preferred specific embodiments of the present utility model have been described in detail above, and it should be understood that those skilled in the art can make many modifications and changes according to the concept of the present utility model without creative work. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the utility model through logical analysis, reasoning or limited experiments on the basis of the prior art should be within the scope of protection defined by the claims .

Claims (4)

1. Industrial VOC exhaust gas catalytic combustion treatment system, characterized in that: it includes a spray treatment module, a drying module and a catalytic burner, the exhaust gas discharge pipe is connected to the spray treatment module, and the spray treatment module is connected to the drying module The drying channel is connected, the drying module is connected to the catalytic burner, the exhaust gas pipe of the catalytic burner is connected to the main discharge pipe, and the main discharge pipe is provided with a branch pipeline connected to the heat source interface of the drying module . 2. The industrial VOC waste gas catalytic combustion treatment system as claimed in claim 1, characterized in that: the spray treatment module includes a treatment tower, and at least one humidification treatment chamber is arranged in the treatment tower from bottom to top sequentially and the secondary dust removal chamber, the humidification treatment chamber and the secondary dust removal chamber are separated by a filter packing layer; a first spray device is installed in the secondary dust removal chamber, and the first spray device is installed in the above the secondary dedusting chamber; the processing tower is provided with a flue gas inlet and a gas outlet, the flue gas inlet is connected to the humidification treatment chamber, and the gas outlet is connected to the secondary dust removal chamber, and in the humidification process A second spraying device is arranged on the cavity, and a processing liquid pool is provided at the bottom of the treatment tower, and the second spraying device is connected to the processing liquid pool through a delivery pipe and a water pump. 3. The industrial VOC waste gas catalytic combustion treatment system according to claim 2, characterized in that: the first spraying device or the second spraying device includes a spiral disk arranged in the secondary dust removal chamber or humidification treatment chamber pipe, and several shower heads are arranged on the spiral coil pipe. 4. The industrial VOC exhaust gas catalytic combustion treatment system as claimed in claim 3, characterized in that: the humidification treatment chamber is arranged in stages, and the humidification treatment chamber is divided into at least two sub-humidification treatment chambers by an auxiliary filter packing layer; The spraying devices are respectively arranged in the first-level sub-humidification treatment chamber and the second-level sub-humidification treatment chamber.