02-Design Abstract2-Word2003版Design Abstract

Abstract The Project of Yueyang Xingchang Petrochemical Co.40,000 tons Nonyl alcohol per year combined 10,000 tons P-tert octyl phenol per year常州大学CHANGZHOU UNIVERSITY“东华科技陕鼓杯”第十二届全国大学生化工设计大赛岳阳兴长石化4万吨/年异壬醇联产1万吨/年对叔辛基酚项目Abstract辛巴“Tung Wah Group of Science and TechnologyShaanxi Drum Cup”The Twelfth National Undergraduate Chemical Engineering Design ContestThe Project ofYueyang Xingchang Petrochemical Co. 40,000 tons Nonyl alcohol per year combined 10,000 tons P-tert octyl phenol per yearAbstractDESIGN UNITChangzhou University Institute Of Petrochemical TechnologyDESIGN TEAMXinBaTHE NAMES OF THE MEMBERSHuang Guijie Yu Jiahao Qian ChengNi Caihong Ren QianqianINSTRUCTORMa Jiangquan Xue Bing Gao XiaoxinWei Kenian Zhou Man2018.8.13Content1. Project Description11.1 project name11.2 Project nature11.3 Project construction site and area21.4 Constructive significance22 Process Selection and Introduction32.1 Process overview32.2 Process selection introduction33 Energy Saving and Innovation93.1 Process innovation93.2 Reaction and separation technology innovation93.3 Energy-saving design and innovation104 Environmental Protection124.1 Wastewater treatment program124.2 Waste treatment plan154.3 Noise processing154.4 Greening175 Factory Selection175.1 Site selection185.2 Factory layout186 Economic Evaluation207 summary22常州大学 辛巴团队1. Project Description1.1 project nameThe Project of Yueyang Xingchang Petrochemical Co. 40,000 tons Nonyl alcohol per year combined with 10,000 tons P-tert octyl phenol per year1.2 Project natureThe objective of this project is to design a facility for the resource utilization of isobutylene for Yueyang Xingchang Petrochemical Co.This device makes comprehensive use of high purity isobutylene, phenol obtained from yueyang xingchang petrochemical general plant with synthetic gas hydrogen and other materials coming from changlian industrial park. High purity isobutylene oligomerization was used to produce diisobutylene, diisobutylene hydroformylation and hydrogenation were used to produce isononyl alcohol, diisobutylene alkylation was used to produce p-tert octyl phenol, and o-tert octyl phenol, 2, 4-ditert octyl phenol were also produced. Among them, the isononyl alcohol mass fraction was 99.97%, the p-tert octyl phenol mass fraction was 99.8%, the o-tert octyl phenol mass fraction was 99.5%, and the 4-ditert octyl phenol molar fraction was 99.5%. Under the background of high attention to the global climate change and environment problems, many industrialized countries put forward to developing clean energy vehicles, controling and eliminating the traditional fuel vehicle exhaust pollution from the source, some countries even made the outage schedule of traditional fuel vehicle, Thus, under the condition of sharply reduced demand in the automotive fuel oil and fuel oil additives, effective use of oil and oil processing resource has the important practical significance.1.3 Project construction site and areaHunan Yueyang Xingchang Petrochemical Co.1.4 Constructive significanceIn the context of peoples high attention to global change and environmental issues, many countries have made great efforts to develop clean energy vehicles. As a responsible big country actively advocating and participating in global environmental governance, China has already taken the lead in the development of clean energy vehicles. While vigorously developing and promoting new energy vehicles, we have also taken effective measures to improve the emissions of fuel vehicles. One of them is to promote the use of ethanol gasoline in the country before 2020. Therefore, for the chemical industry, how to effectively utilize the relevant fraction resources in petroleum and petroleum processing products is a challenging scientific problem in the case of a large reduction in the demand for vehicle fuel oil and fuel oil additives. The problem we face is to use isobutylene to produce downstream products that have both value in use and market demand, after the introduction of ethanol gasoline and the elimination of octane additives from methyl tert-butyl ether. The factory we chose is Yueyang Xingchang Petrochemical Co., Ltd. The main source is high purity isobutylene, hydrogen, syngas and phenol in the company. The resources are used to make isodecyl alcohol, p-tert-octylphenol and o-t-octylphenol. And 2,4-di-tert-octylphenol. Isodecyl alcohol is mainly used to produce high molecular weight phthalate plasticizers such as diisodecyl phthalate (DINP). As high molecular weight phthalate plasticizers such as DINP gradually replace low molecular weight phthalate plasticizers, the demand for isodecyl alcohol is expected to increase further in the next few years. DINP is widely used as a plasticizer in the automotive, cable, flooring, construction and other industrial fields. Tert-octylphenol is mainly used to prepare phenolic resin (such as p-tert-octylphenol formaldehyde resin, also known as 202 resin, octylphenol phenolic resin, oleophenolic phenolic resin), nonionic surfactant, ink industry ( Including insulating varnish, rust inhibitor and fuel oil, lubricating oil and petroleum additives, etc., organic additives such as rubber additives. The project analyzes the cost, by-product treatment, dependence on other raw materials and technical maturity, and uses isobutylene to produce isodecyl alcohol and p-tert-octylphenol. This project is not only beneficial to the healthy development of Xingchang Petrochemical Company, but also The project can achieve certain economic and social benefits.2 Process Selection and Introduction 2.1 Process overviewThe production of p-tert-octylphenol by the production of diisobutylene by the Bayer butene oligomerization process, the production of isodecyl alcohol by the Oxeno process and the catalysis of the resin. The process is mature, the investment cost and operation cost are reduced, the catalyst performance is stable during operation, the control is easy, the device has a small footprint, and the pollution problem of the phenol-containing wastewater is fundamentally solved, the equipment is not corroded by acid, and the high purity can be selectively obtained. High-yield p-octyl phenol, unreacted materials can be recycled and economical.2.2 Process selection introduction1. Isobutylene dimerization reaction sectionThe high-purity isobutylene is mixed by a multi-stage compressor and a cooler to achieve a temperature difference close to that of the solvent n-hexane, and is pumped to the tubular reactor. Under the reaction conditions of 90 C and 20 bar, the acidic cationic resin is used. The catalyst undergoes dimerization reaction to form diisobutylene. After the reaction, separation and heat exchange, it enters the subsequent reaction section, and the solvent and the inhibitor are recycled and fully utilized.Figure 2-1 Flow chart of isobutylene dimerization process (A) Figure 2-2 Flow chart of isobutylene dimerization process (B) The first part: the pretreatment part of the isobutylene raw material, the high-purity isobutylene obtained by the MTBE cracking provided by the head mill is subjected to three-stage compression, cooling and then converted into liquid and the material from the top of the n-pentane recovery tower is exchanged and exchanged between the streams. The dimerization reaction feed agitation tank is entered; at the same time, the replenishing solvent n-pentane is pumped through the n-pentane feed tank to the dimerization reaction feed agitation tank; the three are mixed and then enter the dimerization reactor. The second part: isobutylene dimerization reaction and separation part, the mixture from the isobutylene feed stirred tank discharge pump enters the dimerization reactor, the reactor of this section adopts the tube-type fixed bed reactor, and the mixture after the reaction passes the n-pentane The recovery tower feed pump is sent to the n-pentane recovery tower for separation, and the overhead condenser obtains the product to the first part of the isobutylene raw material pretreatment portion for heat exchange between the streams, and the bottom is obtained with a purity of 99.98% of diisobutylene, which are respectively sent to The reaction was carried out in the synthesis section of tert-octylphenol and isodecyl alcohol.2. Synthesis of alkyl phthalateAmong the many processes for preparing p-tert-octylphenol from diisobutylene, the resin catalyzed process can achieve higher purity and clean production process. Therefore, the resin catalysis method is selected.Figure 2-3 Flow chart of the alkylation process of tert-octylphenol (A) Figure 2-4 Flow chart of the alkylation process of tert-octylphenol (B)The high-purity diisobutylene obtained from the previous stage and the phenol from the raw material zone are sent to the alkylation reactor through the feed stirred tank, and the reacted mixture is separated into the subsequent three columns for separation, respectively, to obtain our main product pair. Tert-octylphenol and by-product o-t-octylphenol, 2,4-di-tert-octylphenol. The first column is a phenol recovery tower. The top product is mainly unreacted phenol for recycling. It is pumped to the reaction feed stirred tank. The bottom product is mainly polyalkylphenol, which is sent to the second tower. The o-octylphenol separation column is separated and purified. In the o-octylphenol separation column, the top of the column obtains o-octyl phenol with a mass fraction of 99.5%, and the bottom of the column mainly contains p-tert-octylphenol and 2,4-di-tert-octylphenol, which are pumped to the third. The columns were separated from the tertiary octylphenol separation column. In the p-tert-octylphenol separation column, p-tert-octylphenol with a purity of 99.8% was obtained at the top of the column, which reached the enterprise standard grade, and the bottom obtained a 2,4-di-t-octylphenol with a mass fraction of 99.5%.3. Hydroformyl chemical section and isodecyl alcohol synthesis hydrogenation sectionIn the process of producing isodecyl alcohol from hydroformylation and hydrogenation of diisobutylene, the Oxeno process is simpler and easier than other methods. Based on this process, the project utilizes the syngas of the Changlian Industrial Park. Hydrogen is used to prepare isodecyl alcohol.Figure 2-5 Process diagram of hydroformyl chemical section (A) Figure 2-6 Process diagram of hydroformyl chemical section (B) Figure 2-7 Process flow chart of isodecyl alcohol synthesis and hydrogenation section (A)Figure 2-8 Process flow chart of isodecyl alcohol synthesis hydrotreating section (B)常州大学 24 辛巴团队3 Energy Saving and Innovation3.1 Process innovation In the process, high-purity isobutylene obtained by MTBE cracking is dimerized into diisobutylene, a part of diisobutylene is hydroformylated and hydrogenated to synthesize isodecyl alcohol, and the other part is alkylated to synthesize p-octylphenol. The innovation of the process resource utilization is as follows:1. In the past, diisobutylene was usually synthesized by using a C4 fraction, and the synthesized diisobutylene often contained other components, which affected subsequent production. The project directly synthesizes diisobutylene from high-purity isobutylene obtained by MTBE cracking to avoid the influence of excessive impurities on subsequent production.2. Isodecyl alcohol is mainly used in the production of plasticizer DINP. The domestic isodecyl alcohol producer is currently only one Sinopec, with a production capacity of 180,000 tons/year. However, it is still in short supply. From the environmental point of view, DINP will replace DOP, so isodecyl alcohol will also shine in the near future.The annual domestic imports of tert-octylphenol are much larger than the export volume, and the domestic production cannot meet the domestic demand. Therefore, the production of this product can make full use of the isobutylene resources.3.2 Reaction and separation technology innovation3.2.1 Efficient reaction new processThe novel cationic resin catalyst is used in the synthesis of tert-octylphenol. The catalyst has high catalytic efficiency and completely isolates water during use, which fundamentally solves the problem of phenol-containing wastewater and makes the production process meet environmental protection requirements.3.2.2 Efficient separation of new processesHigh-efficiency filtration process: This project uses a continuous filtration filter press for filtration. This filter press increases the filtration of the vertebral body, thus increasing the filtration area and making the filter more efficient; since the outer edge of the spiral blade and the pusher spiral is only a small distance from the surface of the filter media, it is always maintained. Very thin filter cake layer, high filtration rate; operation is in the sealed state, suitable for dangerous products that are flammable, explosive, toxic or highly toxic. The novel continuous filter press filter can realize continuous operation compared with the plate frame filter press, the box filter press, the vane filter and the tubular filter press filter, and the filter cake can be removed without opening the filter press. Collected directly from the vertebral body; when filtered, it can be non-volatile to the air for toxic carbon monoxide, which is environmentally friendly.High-efficiency evaporation process: The evaporator can be generally divided into a rising film evaporator and a falling film evaporator. Compared with the rising film type, the falling film evaporator has a large heat transfer temperature difference, and the heat transfer performance is good; the evaporator volume is reduced; Evaporation of unstable materials.3.3 Energy-saving design and innovation3.3.1 Low energy consumption in the whole processThe p-tert-octylphenol prepared in this project is solid under standard conditions. Therefore, after the preparation of the p-octyl phenol product, the product can be cooled and purified without large-scale public works, and only needs to be separated by filtration, and can be naturally cooled. Granular packaging reduces energy consumption.In the project design process, the temperature of the top of the distillation column is controlled at about 40 to 50 degrees. Only the conventional cooling medium, cooling water, can be used. The temperature of the tower is also controlled within a reasonable range, which reduces the energy consumption of the entire production process.3.3.2 Construct optimized heat exchanger networkThis project uses pinch analysis and heat integration energy-saving technology, combined with Aspen Energy Analyzer V9.0 software, to obtain a heat exchanger network solution suitable for this system, so that the hot and cold process logistics in the plant can exchange heat within a reasonable range. The purpose of saving energy. Compared with the heat exchange network that uses heat integration technology to directly exchange heat with public works, the energy recovery rate (energy saving rate) of the heat exchange network after heat integration reaches 7%.The heat integration network after heat integration is shown in Figure 3.1:Figure 3-1 Heat exchanger network3.3.3 energy saving effectThe energy consumption before and after the heat integration is as follows:Table 3-1 Energy consumption comparison table before and after optimizationCold utility /KWHot utility /KWtotal /KWPre-optimization utility quantity8139942517564Optimized utility quantity7520880616326Energy saving /%7.6%6.57%7.05%Annual reduction in carbon dioxide emissions1097tons4 Environmental Protection4.1 Wastewater treatment programThe industrial wastewater generated by this project is mainly the wastewater containing the reaction section, which contains a large amount of organic substances such as methanol and dimethyl ether, and the wastewater is led to the sewage treatment tank, and anaerobic treatment is carried out under the UASB process to produce biogas for resource utilization.The UASB consists of a sludge reaction zone, a gas-liquid-solid three-phase separator (including a sedimentation zone) and a gas chamber. A large amount of anaerobic sludge remains in the bottom reaction zone, and sludge with good sedimentation performance and cohesive properties forms a sludge layer in the lower part. The sewage to be treated flows from the bottom of the anaerobic sludge bed into the mixed contact with the sludge in the sludge layer, and the microorganisms in the sludge decompose the organic matter in the sewage and convert it into biogas. The biogas is continuously released in the form of tiny bubbles. During the ascent process, the tiny bubbles gradually merge and gradually form larger bubbles. In the sludge bed, due to the agitation of the biogas, a sludge with a relatively thin sludge concentration and water rises into the three. The phase separator, when the biogas hits the reflector on the lower part of the separator, folds around the reflector, then passes through the water layer into the gas chamber, concentrates on the gas in the gas chamber, and is led out by the conduit, and the solid-liquid mixture is reflected into the three-phase In the sedimentation zone of the separator, the sludge in the sewage flocculates, the particles gradually increase, and settle under gravity. The sludge deposited on the inclined wall slides back into the anaerobic reaction zone with the inclined wall, so that a large amount of sludge is accumulated in the reaction zone, and the