On zero discharge of gas generation wastewater

Zero emissions is only an ideal state; 70% is already quite good

A gas generation wastewater treatment system can be installed; the water generated in the gas production process is subjected to sedimentation, and then pumped via submersible pumps to a cooling tower where it undergoes convective aeration and cooling before being recycled. The coal slag in the sedimentation tank is pumped using an automatic sludge suction crane to the concentration tank for further separation; after being concentrated into a paste-like substance, it is sent under pressure via a hose pump to an automatic box-type plate and frame filter press for filtration, with the filter cake being used as fuel for the fluidized bed furnace. This enables a closed-loop circulation of the gas generation pollution sources, achieving zero emissions.

The specific measures for wastewater reuse depend on the gas production process! :lol :lol

1. Gas production involves a water-deficient process, and zero emissions can be achieved in principle. 2. The operating costs of wastewater treatment systems are not low; it is necessary to choose an appropriate treatment process. 3. Recently, I have seen a term related to environmental protection and energy conservation in the chemical industry being frequently used in newspapers and on the Internet – zero emissions. For example: · Sinopec in the Shanghai Chemical Industry Park produces 900,000 tons of ethylene per year, achieving a \"world-class circular process\" with zero emissions ； · Sinochem Group launched the \"Zero Discharge Strategy for Chemical Industry Wastewater\" in 2008 · Zero discharge of wastewater in the Yangtze Chemical Industrial Park. · Jinzhou Petrochemical has achieved zero discharge of chemical wastewater. (A investment of 29 million yuan was made to build a reclaimed water reuse system with a processing capacity of 500 tons per hour.) · Hebei Zhengyuan Chemical Industry, and so on. The so-called “zero emissions” refers to the use of modern technologies to achieve the recycling of natural resources, with an ongoing pursuit of eliminating waste entirely. The essence of zero emissions is the recycling of waste, thereby reducing environmental pollution. Zero emissions are more importantly about embodying a mindset, a mindset of continuously reducing emissions. Rather than the simple goal of “zero”. This post was last edited by hldxc on 2009-2-1 21:48]

It is impossible for a real gas generation system to achieve zero emissions; the waste gases generated can be treated through chemical absorption methods； Wastewater is treated through water treatment equipment, but the waste residue cannot be processed because the raw coal contains substances such as heavy metals. Zero emissions are nothing but a self-deceiving lie; the waste that generates gases cannot be recycled, and at present, deep burial is merely a last resort used internationally.

True zero emissions cannot be achieved; instead, emissions can only be reduced through continuous improvements to processes, as well as by recycling more waste

Achieving “zero emissions of the three wastes” in chemical enterprises is merely an unattainable political slogan. At present, and for quite some time to come, it is impossible to achieve this either in terms of technology or financial resources. The term “zero water discharge” referred to here means purifying wastewater and reusing it within a certain range; beyond this range, zero water discharge is achieved. Theoretically, it is achievable, but in practice, reasonable processes must be adopted based on actual conditions, advanced equipment should be chosen, and efforts must be made to achieve the goal. The treatment of “gray water” here is quite difficult.

Our gas generation water system works as follows: the scrubber tower is divided into two sections; the upper section is used for cooling, and the water used there is relatively clean and in large quantities； For dust removal in the lower section, relatively dirty water is used in smaller quantities. The two streams of water are reused respectively, ensuring that no wastewater is discharged outside. The specific methods of control are covered by patents.

Zero emissions is merely a theoretical requirement; the chemical industry can be considered a highly polluting sector, with few companies that aim environmental protection as their ultimate goal. Companies are focused on profitability, and gas production wastewater is one of the three types of waste generated, representing a challenge that requires special attention in terms of treatment. All manufacturers have varying degrees of pollution. Of course, zero emissions isn’t entirely unattainable, but it requires significant investment