The main issues of the "Five-Year" chemical industry environmental protection

The China Chemical Industry Association for Prevention of Pollution learned that the main topics of China's chemical environmental protection during the "Tenth Five-Year Plan" period are:
1. The dyes and intermediates industry should focus on the technical development of the treatment of acid dyes wastewater and H-acid wastewater. It is necessary not only to obtain the results of small-scale tests, but also to build industrialized demonstration devices and have the conditions for promotion. For the wastewater treatment technologies of γ-acid, j-acid, and DSD acid that have achieved small-scale test results, the scientific research units should be assisted to find cooperative units to conduct pilot tests as soon as possible. At the same time, it is necessary to develop economical and efficient decolorizing agents to solve the problem of deep coloration of dyes.
2. While speeding up the use of bionic pesticides, biopesticides, and low-toxicity, high-efficiency pesticides to replace organic phosphorus pesticides, the pesticide industry should vigorously develop technologies for recovering various useful substances from the “three wastes”, technologies for removing odors, and difficulties in catalytic oxidation pretreatment. The biochemical wastewater technology, as well as key technologies such as phosphorus and nitrogen removal, are studied and cultured to screen new strains that are resistant to alpine and high-efficiency.
3. The nitrogen fertilizer industry should develop technologies for the pretreatment and recycling of high-concentration ammonia nitrogen wastewater, such as liquid membrane separation, stripping-rectification, hydrolysis, etc., and cooperate with biochemical treatment to completely solve the problem of COD and ammonia nitrogen pollution in fertilizer plants, especially Texaco coal slurry gasification and pulverized coal gasification should be studied for wastewater treatment methods with high salinity, ammonia, and COD.
4, titanium dioxide industry to develop dilute sulfuric acid purification and concentration technology, such as the use of ceramic filter to remove impurities in dilute sulfuric acid, and then dilute sulfuric acid from 15% to 55% or more, and then its comprehensive utilization.
5. Potassium carbonate industry should develop the recycling of diluted ammonia water and ammonia-nitrogen emission standards. The lead and salt industry should develop effective treatment technologies for lead dust and lead-containing waste water. Chloroform and hydrazine hydrate should develop wastewater treatment technologies.
6. The waste water produced by the pigment industry for the consumption of lemon yellow contains high levels of sodium chloride and has a high chroma. It is necessary to open the pretreatment technology prior to the occurrence of chemical treatment to create conditions for meeting the discharge standards.
7. We must open up new ways for the comprehensive utilization of various waste residues that can pass through economically and technologically. Such as the salt mud produced by electrolysis of salt, the calcium carbide slag produced by acetylene generators, the mud produced by the production of barium chloride, the saponification residue produced by the production of ethylene oxide, and the waste residue generated by chlorination, etc. A major breakthrough was made during the "10th Five-Year Plan" period. At the same time, mercury removal technology for mercury-containing dilute hydrochloric acid produced in PVC production should be studied. The dust removal and desulfurization technology for rotary kiln exhaust gas with carbide slag as raw material for cement production is studied. The technology for recovering vinyl chloride from monomeric (VCM) distillation off-gas in PVC production is studied. Exhaust gas treatment technology for the incineration of chloride, phosphide and sulfide wastes.
8, research and development of epichlorohydrin and propylene oxide wastewater treatment standards discharge technology and incineration technology containing organic chloride waste liquid, research methionine production process in addition to odor technology, research chloroacetaldehyde wastewater aldehyde removal technology and from PVC Suspended resin (resin) technology in paste resin wastewater.
9. Develop catalytic oxidation desulfurization technology for sulfur-containing waste water produced by acetylene generators so that a large amount of water can be recycled.
10. To develop new integrated biochemical reactors, such as deep biochemical reactors, etc.; to reform and innovate on the basis of digesting and absorbing foreign pure oxygen aeration devices, in order to increase the biochemical volume load and the utilization rate of oxygen, thereby reducing the energy Consumption and investment costs.
11, the development of a new generation of biotechnology, such as water containing enzyme treatment of cyanide-containing wastewater, microbial purification of styrene wastewater, sulfur oxidase treatment of sulfur-containing oxide wastewater. A new type of reactor combined with biotechnology and membrane separation technology was studied.
12. To study the adsorption performance and purification efficiency of activated carbon fiber, as well as the rational structure and corrosion protection of adsorption equipment, in order to recover aromatics, dichloroethane, vinyl chloride and cyclohexane and other useful substances in organic waste gas, and to come up with a new approach.
13. To study the treatment technology of sulfurized smoke in the rubber processing industry, as well as the disposal method of carbon black packaging waste paper bags, and efficient dust removal equipment for dry granulation and packaging dust.
14. Research on the control of toxic chemicals safety management procedures and control techniques, and emergency measures and risk assessment methods for accidents such as leakage of toxic chemicals.
15, yellow phosphorus industry to develop yellow phosphorus tail gas purification to obtain high-purity CO technology to meet the needs of formic acid, oxalic acid, DMF and other products. Research on the utilization of powder ore sintering and separation technology of waste water and sludge to realize the recycling of “three wastes”.
16. The oxalic acid industry requires all new oxalic acid production processes to replace the sodium formate method that is currently seriously polluted, and the sodium formate method must further solve the furnace gas purification wastewater treatment technology to ensure that the pollutants can be discharged after reaching the standards.
17. Bleaching fine production We must carefully study the wastewater treatment methods that produce high amounts of hypochlorite and a large amount of water in the production process to avoid dilution and affect the water body.
18. Phosphatic fertilizer industry should study the mother liquor treatment method for the production of fluorine sodium fluoride from the fluorine-containing tail gas to completely solve the fluorine pollution and sodium chloride caused by soil salinization.
19, methionine production to solve the odor problem as a major topic of research, and the development of methacrylate recovery from waste liquid technology to ease the contradiction between the factory and nearby residents.
20. Refined Benzene Refined acid tar produced by sulphuric acid scrubbing method has always been an unresolved problem of pollution in the boss. It is necessary to focus on the development and utilization of technologies and harmless treatment methods to achieve a breakthrough as soon as possible.
21. The production of hexavalent chromium-containing waste residue from the production of sodium erythronium should be studied to open up new economically advantageous ways of use or to better detoxification methods so that safe landfilling can be carried out after thorough detoxification.
22. Carry out research on the recycling of useful substances such as terephthalic acid (PTA) waste residue, by-product dichloropropane residue in the production of propylene oxide, and waste lye from production of cyclolacconazole in the production of caprolactam.
23. To solve the problem of SO2 pollution in self-contained power plants and industrial boilers, various types of low-cost, high-efficiency desulfurization methods have been studied, such as coal gasification, desulfurization in circulating fluidized bed furnaces, Mg(OH)2, seawater washing. Research on dry and wet removal of SO2 and other process technologies from modified limestone.
24. Carry out research on the recovery of precious metals, comprehensive utilization and harmless treatment technologies for various waste catalysts.
25. Research on the comprehensive utilization technologies and harmless treatment technologies of fly ash, slag, coal gangue recovery heat energy and building materials.
26. Conduct thermal cracking or other methods for the recycling of solid waste such as waste plastics, waste rubber and oligomers.
27. To carry out the research on the enrichment, filtration, dehydration and purification technologies of waste mud, scum and residual activated sludge (collectively referred to as "three muds") in wastewater treatment plants and the new approaches for comprehensive utilization.
28. Develop safe, low-cost landfill technology for solid waste. This includes research on leachate monitoring, collection and treatment systems, and advanced technologies that can recover biogas.
29, organophosphorus pesticides (Manson manganese, Zesen zinc, etc.), heterocyclic pesticides (such as carbendazim, etc.) to study the improvement of production processes to achieve cleaner production, mainly at the same time the development of effective treatment of wastewater physicochemical method , Or directly meet the standard discharge, or physical and chemical treatment and then biochemical treatment to achieve emission standards.
30. For urethane pesticide waste water, the research and development of halogenated phenol recovery technology should be studied. After the recovery device is established, biochemical treatment of the waste water will achieve the desired effect.
31, amide herbicides pesticides (such as butachlor, acetochlor) wastewater, the use of biochemical treatment COD removal rate of up to 80%, but with phosphorus trichloride chlorinating agent, so that the wastewater contains phosphorous acid Large, difficult to handle to meet emission standards, research and development of technology without phosphorus trichloride.
32, benzene herbicides (such as 2,4 D-butyl, 2-methyl-4-chloro, etc.) pesticide wastewater containing halogenated phenol higher, but also need to research and development of the recovery of halogenated phenol technology. The waste water after recovery of halogenated phenols also contains organic substances such as acetic acid, and after biochemical treatment, it may reach emission standards.
33. Most pyrethrum pesticide wastewaters contain cyanide compounds. Before the biochemical treatment, cyanide compounds must be recovered. Therefore, the successful recovery of cyanide compounds is the key to the discharge of pollutants in wastewater.
34. Organochlorine pesticides (such as DDT) wastewater, containing organic chlorides into the water will persist for a long time, and will continue to be enriched in the biological chain. It is crucial to research and develop technologies to eliminate organic chloride pollution.
35. Based on the digestion and absorption of foreign incinerator technology, research and development of incineration technology suitable for China's national conditions will form a complete set of reliable technologies and equipment for incineration, exhaust gas desulfurization, denitrification, deodorization, and heat energy recovery and utilization. In particular, it is necessary to study and solve the problem of anti-corrosion materials. And nozzle wear problems and supporting instrument localization.
36. The chromium salt industry continues to research and improve calcium-free roasting, and further develops a comprehensive utilization technology of detoxification of chromite ore and the use of large amounts of chromite, so as to effectively treat chromium ore cinders piled up over the years.
To sum up, achieving the "10th Five-Year Plan" chemical environmental protection plan, whether it is to improve China's environmental quality, is still very important for the sustained, rapid and healthy development of the chemical industry. However, whether or not we can achieve the “Tenth Five-Year Plan” chemical environmental protection plan depends on two basic conditions: First, we must have the funds needed to achieve our goals, and it is absolutely necessary to increase the investment in chemical environmental protection. Even if we build few large-scale projects for chemical infrastructure construction, it is worthwhile. Agree. The second is to have the technical guarantee needed to accomplish the goal. Only if the investment does not have technology, it still cannot be achieved. Therefore, it is imperative to strengthen scientific research on chemical environmental protection. Only the enterprises work hard and integrate closely with the institutes of science and technology, universities and colleges, and work collaboratively to achieve major breakthroughs in all technical difficulties. It is possible to realize the “10th Five-Year Plan” chemical environmental protection plan.