Expectations for “subtraction” waste gas purification and environmental protection equipment

Expectations for “subtraction” waste gas purification and environmental protection equipment

In the current energy price climbing, environmental protection equipment is not directly generating profit equipment, if the energy consumption of environmental protection equipment is lower than the total energy consumption of the original paint iron oven, then I call this environmental protection equipment as " Subtraction "exhaust gas purification and environmental protection equipment" is an ideal environmentally friendly and environmentally friendly equipment for the printing iron and steel drum industry.

First, the seriousness of paint exhaust pollution:

Since the coatings currently used are basically organic solvent coatings containing benzene, there are obvious odors and smoke generation in the surrounding environment and workshops, such as 0.7m2 tinplate per area, the solid content of the coating is 35%, and the coating thickness It is 6g/m2, and the speed is 5000 sheets/hour. The pollution level per hour is about 39 kg/hour, and the severity can be imagined.

Second, the history of purification of waste gas:

Despite the history of various methods and equipment for purifying exhaust gases, the general trend is toward thermal combustion methods without secondary pollution - incineration and catalytic combustion. The results of the survey on China's printing iron industry are:

1. Exhaust gas purification and environmental protection equipment imported from Germany, Japan and Taiwan are all incineration methods. This method treats exhaust gas thoroughly, but the energy consumption is large, which is between 110-1.2 million kcal/hour, which greatly exceeds the original paint. The total energy consumption of the room, which I call the “addition” environmental protection furnace, is currently not popular with users because of the increased production costs.

2. The domestic enterprises that manufacture environmental protection equipment adopt the thermal combustion method based on catalytic combustion method in combination with the country. The organic solvent molecular chain in the exhaust gas is cracked by the set high temperature to form carbon dioxide and water, which achieves the purpose of purification. The purified heat released is recycled to the drying room for production. If the energy consumption of environmental protection equipment can be less than the total energy consumption of the original paint iron baking room, then I call it the “subtraction” environmental protection equipment, which is the ideal environmental protection equipment for users.

Third, select the focus of waste gas equipment to clean environmental protection equipment:

1. Environmental protection: Appearance----The purification gas of the discharge port is smokeless and tasteless.

Standard----in accordance with national GB 16297-1996 gas emission standards

2, energy saving (remaining heat utilization)

The use of purifying heat can stop the burning furnace of the original paint drying oven, and the excess heat is used for the dehydration drying room (or the printing iron oven), compared with the energy consumption of the original two drying rooms. Environmental protection operation cost ≤ zero.

3, quality: waste heat utilization does not affect product quality

Temperature fluctuation at the temperature measurement point of the drying room is ±3 °C

4. Life: Catalytic combustion method-----catalyst life> 2 years

Incineration method-----furnace life>8 years

5. Cost-effectiveness: Since environmental protection equipment is not a production equipment that directly generates profits, the operating cost determines the cost performance of environmental protection furnaces. If the operating cost of environmental protection equipment is less than zero, depending on the type of coating, the investment cost of environmental protection equipment can be recovered within a few years. .

6. Safety: The burner, furnace body, fan and air duct switching device are all operated by PLC and GOT electrical control.

Fourth, the expectations of "subtraction" environmental protection equipment:

1. Energy-saving goal: 5-10% energy saving under the same energy (oil, gas) conditions.

2. Develop new energy varieties and better purification technologies to further improve energy efficiency.

Shanghai Qiaosheng Mechanical and Electrical Equipment Co., Ltd. Yin Yiguo