Process Description: Chemical enterprises of solid waste because it contains a lot of organic matter and other impurities, generally as a waste incineration after landfill treatment, which not only caused the waste of resources, but also lead to secondary pollution of the environment. This technology is mainly on the aluminum, iron solid waste for resource, reduction of treatment, solid waste reduction in the degree of more than 85%, such as aluminum containing iron or iron containing aluminum. After the “organic matter removal – acid soluble – hydrolysis polymerization – aging” of the four stages, synthetic poly aluminum sulfate products. According to the iron and aluminum content of different, the performance of the product is not the same.

Basic process：

Process Description: Organic matter by 350 ℃ in the conditions of roasting, remove the solid waste contained in organic matter and other impurities; to the acid leaching stage, with sulfuric acid for acid solution, in order to speed up the reaction rate, in the 60-70 degrees Celsius conditions And the degree of hydrolysis is controlled by adjusting the pH of the acid leach solution in the hydrolysis polymerization stage; the samples after the hydrolysis polymerization are aged at a certain temperature.

Process Description: Organic matter by 350 ℃ in the conditions of roasting, remove the solid waste contained in organic matter and other impurities; to the acid leaching stage, with sulfuric acid for acid solution, in order to speed up the reaction rate, in the 60-70 degrees Celsius conditions And the degree of hydrolysis is controlled by adjusting the pH of the acid leach solution in the hydrolysis polymerization stage; the samples after the hydrolysis polymerization are aged at a certain temperature.

Technical characteristics: 1, the technology can be comprehensive utilization of solid iron in the iron and aluminum resources, do not need to be separated, reduce costs.
2, resource utilization is high, the basic does not produce secondary pollution.
3, the technical process is simple, different from the previous reduction and re-oxidation process, directly through the trivalent iron ions prepared by the polymerization of aluminum sulfate.

Process Description: This technology uses “iron mud removal – acid leaching – filtrate impurity – reduction” of the process of resource reuse of iron sludge, iron utilization rate of 90% or more. The technology not only can solve the problem of iron pollution of the environment, and make full use of iron in the recyclable resources, the production of high value-added ferrous sulfate and polyferric sulfate, which turn waste into treasure, is conducive to resources and society Sustainable development.

Basic process：

Process Description: 1, iron powder reduction of the system of ferrous sulfate
In addition to mixing: the slurry and water to a certain percentage of mixed pulp, adjust the pH of the mixture to a certain value, the reaction after a period of time to filter to remove part of the organic and inorganic salts.
Acid leaching: the addition of iron after adding a certain concentration of sulfuric acid in the acid leaching, and then filter to Fe3 + was leached to get the Fe3 +-containing filtrate, and insoluble in organic matter is separated from acid.
Removal of organic matter: The filtrate obtained after acid leaching removes the organic matter present in the filtrate by means of adsorption, iron-carbon micro-electrolysis, Fenton oxidation.
Reduction: with iron powder as a reducing agent to control a certain reaction conditions, the Fe3 + reduced to Fe2 +.
Crystallization: Crystallization by crystallization or cooling to obtain ferrous sulfate heptahydrate.
2, sulfur dioxide reduction method of ferrous sulfate
In addition to mixing: the slurry and water to a certain percentage of mixed pulp, adjust the pH of the mixture to a certain value, the reaction after a period of time to filter to remove part of the organic and inorganic salts.
Add acid to restore: the iron and a certain concentration of sulfuric acid solution in a certain proportion of the reaction vessel, to which access to sulfur dioxide, adding catalyst, the occurrence of a reduction reaction.
Blow off: After the reaction is complete, remove the residual sulfur dioxide and some organic matter from the reaction solution.
Crystallization: Crystallization by crystallization or cooling to obtain ferrous sulfate heptahydrate.
3, ferrous sulfate polymerization of ferric sulfate
The sulfuric acid, ferrous sulfate and water in proportion to the reactor, at room temperature or slightly higher temperature, stirring slowly adding sodium chlorate / H2O2. Verify that ferrous ions are reduced to the specified concentration to end. The solution was then concentrated to obtain a polymeric ferric sulfate solution meeting the national standard level.

Technical characteristics: 1, the technology can remove organic matter and heavy metals in the sludge, to ensure the quality of ferrous sulfate and polyferric sulfate.
2, iron element utilization is high, the basic does not produce secondary pollution.
3, the technical process is simple, low cost of disposal.
4, the preparation of ferrous sulfate and polyferric sulfate are water treatment agent, can be used to waste water treatment process to meet the requirements of circular economy.

Process Description: Chemical industry produces high salt wastewater usually contains a variety of inorganic salts, conventional evaporation crystallization technology can only get a variety of salt salt, the use of value is not high. Division I for high-salt wastewater, first through the personalized pre-treatment means to remove organic matter in the wastewater, and then through the sodium sulfate – sodium chloride separation technology were qualified sodium chloride and sodium sulfate. The separated salts can be further fed into other industrial processes.

Basic process：

Process Description: The use of MVR evaporator, 80 ℃ high temperature evaporation to obtain high purity anhydrous sodium sulfate;
Mother liquor frozen crystallization, precipitation of sodium sulfate – sodium chloride mixed salt;
The mother liquor enters the MVR evaporator at 50-55 ° C and evaporates at low temperature to obtain high purity sodium chloride.
The mixed salt returns to the high temperature evaporation stage.

Technical characteristics: simple process, can also get sodium sulfate and sodium chloride products;
In the high temperature area directly to anhydrous sodium sulfate products, to facilitate the subsequent transport and use;
Mixed salt is generally used as a solid waste for landfill, separation of mixed salt can reduce the secondary pollution of the environment, while the separation of salt can be put into production, reduce costs and save resources.

Introduction: Iron oxide pigments are the second largest production and sales of inorganic color pigments, color, wide spectrum, non-toxic, inexpensive, widely used in coatings, building materials, plastics, electronics, pharmaceutical and other industries. In the “water-solid integration” industrial park, ferrous sulfate made of iron sludge, part of the water treatment agent in the industrial park to digest, the remaining use of our own research and development of the technology made of iron oxide pigments for sale. Production process of salt water can be produced in the “water-solid integration” industrial park to achieve resource-based, so no pollution emissions. Our company has iron oxide red, yellow iron oxide, transparent iron oxide red, transparent iron oxide yellow, ferromanganese black and other products of production technology. Compared with traditional iron oxide pigment manufacturers, the technology in the cost of raw materials and waste disposal costs on the obvious advantages.

Basic process：

Process Description: 1, iron air oxidation preparation of ordinary iron yellow
The ferrous sulfate dissolved with a small amount of liquid alkali neutralization to weak acid to prepare iron yellow seed, after adding excessive iron to fill the solution consumption of ferrous ions, and neutralize the excess sulfuric acid, air temperature reaction after a few hours , Rinsing, drying, crushing the finished iron and yellow products.
2, ammonia air oxidation method to prepare ordinary iron yellow
The ferrous sulfate solution with a small amount of ammonia in the weak acid and then add water to warm the air reaction in the reaction at the same time add ferrous sulfate to balance the concentration of ferrous ions in the solution, add ammonia to balance the PH value of the solution, the reaction After a few hours, rinse, dry, crush the finished product.
3, hydrogen peroxide air oxidation method to prepare transparent iron oxide yellow
The first use of hydrogen peroxide to ferrous sulfate oxidation of ferric sulfate, and then add the liquid alkali PH to weak acid to prepare iron yellow seed, after adding excessive metal, add solution consumption of ferrous ions, and neutralize the excess sulfuric acid, through the air After heating for several hours, rinse, dry and crush.
4, iron and yellow calcination method to prepare iron red
The iron red samples were directly calcined through a muffle furnace, and iron red products with different hues were obtained by changing the calcination temperature.
5, liquid phase coprecipitation method to prepare ferromanganese black
The ferrous sulfate and manganese sulfate in the proportion of mixed solution, with the liquid alkali pH to alkaline, so that the full precipitation, after the air oxidation reaction for several hours, rinsing, drying, calcination, crushed to obtain ferromanganese black products.
6, iron carbonate preparation of iron red
The ferrous sulfate is dissolved in advance, with sodium carbonate to ferrous sulfate all into iron carbonate precipitation, the precipitation rinse after drying calcination, and then crushed to get iron red products.

Technical characteristics: 1, the use of domestic mature technology production technology, product quality to the domestic first-class level.
2, all iron pigments can share the same set of production equipment, to maximize the utilization of equipment.
3, the production of waste water produced by the resource treatment, recyclable, environmentally friendly.
4, and “water-solid integration” industrial park closely, making the product has a great cost advantage.

Introduction: Chemical enterprises because of a large number of hazardous organisms containing organic matter, and the organic composition of complex, the environment has a certain toxicity, processing difficult, resource-based difficulties. This technology is mainly for the chemical and chemical harm to harmless treatment, the waste will be burned into fly ash and some solid particles, to harmless, clean, reduce the purpose of the modern hazardous waste industry The mainstream technology.

Basic process：

Process Description:Hazard waste through a simple pretreatment, transported by the feeding device to the rotary kiln, after the rotary kiln and the second combustion chamber of the incineration, the waste waste reduction, after the incineration of the other by the quench tower for the treatment of flue gas, To prevent dioxin and other toxic substances caused by secondary pollution, the final gas through the exhaust treatment device to meet the discharge standards into the atmosphere after the back.

Technical characteristics: 1, the technology can effectively solve the difficult problem of waste disposal industry, for a large space, widely used, high security
2, rotary kiln combustion efficiency is high, the basic does not produce secondary pollution.
3, the technology comparison project case, the operation process is simple.