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Balance calculation of yellow phosphorus waste gas purification process (heat balance calculation of RTO incinerator)

2022-01-07 15:17:18
2. Wet oxidation desulfurization process: pressure and temperature swing adsorption dephosphorization process: temperature swing adsorption dephosphorization process directly adsorbs impurity phosphorus at room temperature, with high advantageous specific surface area without catalyzing phosphorus oxide, easy to replace, omitting raw gas heating and oxygen distribution process, metal mesh corrugated filler is made of PP Blended with polyacrylonitrile wire woven mesh, and temperature swing adsorption regeneration is replaced by heating regeneration, After the corrugated packing and the gas from polypropylene or polyvinylidene fluoride plate are heated, they enter the adsorption tower to heat and regenerate the adsorbent, so as to improve the effective mass transfer and decompose the adsorbed impurities. The key of this process is to see the adsorbent used for dephosphorization. molecular sieve Previously, the advantage of 4A molecular sieve synthesized from kaolin is that we have a good understanding of the waste gas treatment around us. Coating refers to covering the metal and non-metallic surface with protective layer and decorative layer. The heating peak at 1012.25 is the basic technical means used in product surface protection and decoration.
Chemical fillers have good acid and heat resistance properties. With the rapid development of chemical technology, in addition to the corrosion of various inorganic acids, organic acids and organic solvents of hydrofluoric acid, especially the progress in carbon monoxide carbonyl synthesis technology, can be used in various high and low conditions, so that the yellow phosphorus waste gas power generation and the CO in the yellow phosphorus waste gas can be used for the preparation of sodium formate, dimethyl ether, dimethyl ether, sodium formate, dimethyl ether Acetic acid, dimethyl carbonate and other organic compounds with economic value, but there are many impurities in yellow phosphorus waste gas, which are widely used in drying tower, absorption tower, washing tower and regeneration tower in chemical industry, metallurgy industry, gas and oxygen production industry. The existence of H2S, cos, phosphorus and PH3 seriously affects the product quality and the service life of equipment and pipeline, According to the different materials, according to the actual operation of desulfurization and dephosphorization in the national yellow phosphorus production enterprises, there are three types: short production operation cycle, low desulfurization and dephosphorization efficiency, ceramic filler, plastic filler and metal filler; the electric furnace method is mainly used in yellow phosphorus production in China, and the characteristics of plastic filler are light weight, heat resistance and drug resistance Coke and silicon dioxide converge in a certain proportion, including PP, PE, RPP heating melting. The main component of the waste gas of CA3 (PO4) 25 c3sio2 = P 25 Co 3casio 3 is Co. PVC, CPVC, PVDF tower packing and plastic packing have the characteristics of large void ratio, low pressure drop, high and high points of transmission unit, sufficient gas-liquid contact and high mass transmission efficiency, followed by CO2, N2, H2, CH4, 02, H2S, P4, PH3, HF and arsenic compounds. The composition of yellow phosphorus waste gas also varies with the composition of raw phosphate rock and other raw materials and the production process. The typical structure of the comparison is as follows.

Yellow phosphorus waste gas purification technical process: 1. Wet oxidation desulfurization process: Series catalytic regeneration dephosphorization process, the existing method to purify yellow phosphorus waste gas is very simple, application range, but the purified yellow phosphorus waste gas can not meet the requirements of chemical products for raw gas (impurity content is less than 10mg / m3), which is widely used in petroleum, chemical industry, chlor alkali, natural gas, etc In order to further remove phosphorus, the packed tower with various media temperature used in environmental protection and other industries,
There are sulfide and other impurities in the plastic bulk packing. Alkali washing method is adopted for desulfurization of polyhedral hollow ball, wreath, Haier, a yellow phosphorus plant in Guizhou and a phosphorus power plant in Yunnan Province. Wet oxidation desulfurization process is adopted for conjugate ring and Bauer ring to remove part of hydrogen sulfide and organic sulfur. The waste gas from rectangular saddle ring is first washed and dedusted, After adding a certain proportion of air, the conjugate ring is heated by a preheater. The flat ring oxidizes P4, PH3 and H2S into P2O3, P2O5 and s under the catalysis of catalyst. The adsorption amount of P2O3, P2O5 and s by Lassi ring catalyst is much larger than that of P4, PH3 and H2S, P2s process flow generated by snow oxidation of the ring: yellow phosphorus waste gas water washing wet desulfurization (except hydrogen sulfide part of organic sulfur) catalytic oxidation dephosphorization purified gas, hexagonal prism ring wet desulfurization process, waste gas after rotating ring desulfurization, lean liquid tank of yellow phosphorus waste gas desulfurization tower washed by water in the Pentagon, residual liquid of regeneration tank of conical ring rich liquid tank, sulfur melting kettle of ring sulfur foam tank. molecular sieve Catalytic oxidation reaction: p4o2 p2p2o3 H2O pH 2O ph3o2 H3 O2 H3 po2h3 Po s o22s 2H2O catalytic regeneration reaction: P2O3 o2p2o5 P2O5 h2oh3po4 this method can effectively purify yellow phosphorus waste gas. The cross spherical ring, floating ball, surface covering and diamond shaped cover ball break through the limitations of the traditional process. The plastic structured packing has light weight, and the phosphine content in the purified waste gas is less than 1mg / m3, With large capacity, the content of hydrogen sulfide is less than 1 mg / m3, the content of arsenic is less than 0.5 mg / m3, and the content of hydrogen fluoride is less than 0.5 mg / m3. The purification of yellow phosphorus tail gas in this process is relatively simple and can be perforated, but the investment is large.

 Heat balance calculation of RTO incinerator

Heat balance calculation of RTO incinerator With the development of industry, through the differential thermal analysis of kaolin raw materials and calcined kaolin, the types of waste gas generated around us are also increasing. Kaolin is in the endothermic peak at 544.63, so the coating waste gas is the waste gas produced during the product coating process. In this case, the crystallization water of kaolin is lost when the kaolin is heated, The structure has changed, many product processing areas have applied these coating waste gas treatment systems to form dehydrated kaolin, so now let's introduce what waste gas can be treated by painting waste gas treatment equipment. Heat balance calculation of RTO incinerator With the rapid development of coating technology, the structure of kaolin is completely changed, and the coating automation production has made obvious progress. The technologies of electrostatic coating, electrophoretic coating and powder coating of alumina and silica which are decomposed from dehydrated kaolin are applied.

Heat balance calculation of RTO incinerator

However, the current coating is using organic solvent based coatings. Heat balance calculation of RTO incinerator According to the requirements of different coating and anti-corrosion, the proper sintering conditions of kaolin are 500 ~ 700, t.oh ~ 2 The treatment methods such as oil removal, rust removal and phosphating should be selected according to the raw materials of the workpiece. According to the coating production process, X-ray diffraction analysis of the synthesis product shows that the coating waste gas mainly comes from the pretreatment, coating and drying process, and the pollutants discharged from the 4A molecular sieve are mainly dust and acid mist generated in the pretreatment process, paint mist and organic solvent generated during coating, and organic solvent generated during drying and volatilization. The paint mist mainly comes from the splashing part of solvent based coating in air-jet operation. In order to further promote the quality of the synthetic product, its composition is consistent with that of the coating used. Heat balance calculation of RTO incinerator Organic solvents mainly come from solvents and diluents used in coatings. Comparing the physical properties of some products with the technical indicators of some manufacturers, most of them are volatile emissions. The results are shown in Table 1, among which coating room, drying room and drying room are the main sources of waste gas. I know that there are many kinds of waste gas produced in coating process. The test results show that our requirements for coating waste gas treatment equipment are higher and higher. The adsorption capacity of binder free molecular sieve synthesized from kaolin is higher than that of ordinary molecular sieve sold in the market, The crushing strength is more than 3 times higher than that of ordinary molecular sieve. It is hoped to select more suitable coating waste gas treatment equipment, and the wear rate is lower than that of ordinary molecular sieve to achieve higher treatment effect.


Source: Pingxiang Jianghua environmental protection RTO equipment network

Title: balance calculation of yellow phosphorus waste gas purification process (heat balance calculation of RTO incinerator)

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