Production process and system for synthesizing ether / coal-based diesel oil through thermal blending of high polymer material DMM3-8

Abstract

The invention relates to the field of clean energy for clean utilization of coal, in particular to a production process and system for synthesizing ether / coal-based diesel oil through thermal blending of a high polymer material DMM3-8, after polyoxymethylene dimethyl ether DMM3-8 is heated or cooled to 200 DEG C or above, auxiliaries are added, heat preservation is performed for thermal blending, cyclic stirring and materialization, and the clean and environment-friendly ether / coal-based diesel oil is prepared. According to the invention, industrial chain integration is realized, and a production process line for industrial development of high-added-value new industry by clean utilization of coal is innovated. As a clean energy source, the system is high in compatibility and substitutability, can replace traditional energy sources such as coal and petroleum, and can also replace diesel oil of all grades. The clean and environment-friendly ether / coal-based diesel oil prepared by using DMM3-8 as a mother solution through a heat blending process has a shelf life of more than five years.

Description

Technical Field

[0001] The present invention relates to the field of clean energy using clean coal, and in particular to a production process and system for synthesizing ether / coal-based diesel fuel by thermally adjusting and compounding a polymer material DMM3-8. Background Art

[0002] my country is the world's largest coal producer and consumer. According to incomplete statistics, coal provides approximately 75% of my country's electricity, 60% of its chemical raw materials, 72% of its industrial fuels, and 92% of its residential fuels. Industrial and residential coal combustion is causing increasingly serious pollution, including wastewater, smoke, exhaust gas, and solid waste. The industrialization of clean coal utilization is urgently needed.

[0003] Substandard coal resources, such as lignite, long-flame coal, and thermal coal, account for 50% of my country's total coal reserves. China's dependence on oil imports has reached over 75%. Furthermore, the fluctuations in international oil prices have led to instability and volatile price fluctuations in my country's oil product market, which not only consumes significant amounts of foreign exchange but also poses a serious threat to national energy security. Therefore, there is an urgent need to scientifically and rationally develop and utilize coal resources and develop a clean energy industry based on coal chemical industry.

[0004] Methanol, a key downstream product of coal chemical industry, will have a total methanol production capacity exceeding 200 million tons in China by 2024, but actual demand will only be approximately 150 million tons, with a capacity utilization rate of less than 75%. Although the growth rate of new capacity is expected to slow in 2025 (to 8.9 million tons), most of the plants are supporting downstream supply chains, resulting in limited takeout volume and overall supply pressure. Actual market utilization accounts for only 35-40%, making this product a slow-moving commodity. Developing and producing high-value-added clean energy through scientific and technological innovation is of strategic importance for improving my country's energy structure, promoting transition and transformation, and ensuring the sustainable development of the national economy.

[0005] In the process of actively exploring and developing new paths, new technologies and new models for the transformation and development of the clean coal industry, and striving to create a green and environmentally friendly renewable clean energy and a high-value-added new quality industrial chain for sustainable development, it is urgent to transform the unreasonable molecular structure of carbon, hydrogen and oxygen in traditional coal energy fuels and backward chemical production processes. Summary of the Invention

[0006] To address the issues of irrational carbon, hydrogen, and oxygen molecular structures and outdated chemical production processes in traditional coal energy fuels, this invention provides a process and system for thermally conditioning the polymer material DMM3-8 to produce ether / coal-based diesel fuel. This invention utilizes methanol to produce the polymer material polyoxymethylene dimethyl ether (DMM3-8). This innovative thermal conditioning production process and system utilizes the polymer material DMM3-8 as the primary material for synthesizing ether / coal-based diesel fuel, producing a clean fuel with a novel physicochemical structure. This results in an optimized clean fuel with a scientifically formulated and rationally formulated fuel, more complete combustion, cleaner physicochemical properties, and a longer product shelf life. This invention addresses a key bottleneck in the industrialization of clean and efficient coal utilization, promoting synergistic improvements in environmental protection and pollution control.

[0007] The present invention is achieved through the following technical solutions: First, the polymer material DMM3-8 is thermally adjusted to prepare ether / coal-based diesel production process. After the polyoxymethylene dimethyl ether DMM3-8 is heated or cooled to above 200°C, additives are added, and the heat is kept to perform thermal adjustment, circulation stirring, and physical chemical reaction to produce clean and environmentally friendly ether / coal-based diesel.

[0008] As a further improvement of the process technology scheme of the present invention, the auxiliary agents include energy-saving and efficiency-enhancing combustion aids, medium-temperature coal tar, Fischer-Tropsch wax, anthracene oil, light diesel, castor oil, high-carbon fatty alcohols, diisoamyl oxalate, and vinyl acetate.

[0009] As a further improvement to the process technology solution of the present invention, the heat preparation cycle is stirred for at least 2 hours.

[0010] As a further improvement to the process technology solution of the present invention, the temperature of the heat adjustment circulation stirring materialization is at least 220°C.

[0011] As a further improvement to the process technology solution of the present invention, the temperature of the heat adjustment circulation stirring materialization is at least 240°C.

[0012] As a further improvement to the process technology solution of the present invention, the temperature of the heat adjustment circulation stirring materialization is at least 260°C.

[0013] As a further improvement to the process technology solution of the present invention, the temperature of the heat adjustment circulation stirring materialization is at least 280°C.

[0014] As a further improvement of the process technology scheme of the present invention, the step of adding additives is carried out in two steps. In the first step, energy-saving and efficiency-enhancing combustion aid, Fischer-Tropsch wax, anthracene oil, light diesel, and medium-temperature coal tar are added to polymethoxydimethyl ether DMM3-8 and mixed. After physicochemical reaction for 1 hour, hydrocarbons are formed; in the second step, castor oil, high-carbon fatty alcohols, diisoamyl oxalate, and vinyl acetate are added to a hot mixing tank in sequence and stirred evenly. After physicochemical reaction for 2 hours, clean and environmentally friendly ether / coal-based diesel is formed.

[0015] In the second aspect, the present invention provides a polymer material DMM3-8 thermal blending and synthesis ether / coal-based diesel production system, comprising at least one DMM3-8 raw material tank, at least one blending tank, at least one auxiliary agent tank, and at least one ether / coal-based diesel finished product tank. Each DMM3-8 raw material tank and auxiliary agent tank is connected to at least one blending tank through a pipeline, and all blending tanks are connected to each other through pipelines.

[0016] The process and system for producing ether / coal-based diesel by thermally adjusting the polymer material DMM3-8 provided by the present invention have the following advantages over the prior art: 1. The present invention can directly utilize methanol to deeply process the polymer material polyoxymethylene dimethyl ether DMM3-8. The raw material temperature of polyoxymethylene dimethyl ether DMM3-8 is reduced, thereby reducing the cost of cooling the polyoxymethylene dimethyl ether DMM3-8. This not only saves water resources, but also reduces production costs and improves economic benefits. The present invention uses DMM3-8 as a mother liquor and produces clean and environmentally friendly ether / coal-based diesel through a thermal blending process. It burns fully, does not coke or deposit carbon, improves calorific value and power, and reduces volatility, fragility, and pollution. It achieves clean and environmentally friendly ether / coal-based diesel performance indicators that are higher than diesel performance, and its tail gas emissions exceed EU standards and China VI standards.

[0017] 2. The present invention aims to improve the problems of unreasonable molecular structure of carbon, hydrogen and oxygen in traditional coal energy fuel and backward chemical production process. The ether / coal-based diesel production process and system are innovatively formulated by thermal adjustment of polymer material DMM3-8 to produce a new molecular structure of clean energy, optimize the molecular structure of clean energy quality, and make the innovative new quality production process scientific and systematic, so that the ether / coal-based diesel can burn more fully, be more clean physically and chemically, and have a longer shelf life. The calorific value of the ether / coal-based diesel of the present invention is more than 1.2 times that of diesel, and its thermal efficiency is more than 1.3 times that of diesel; its power performance is stronger than diesel, and its cruising range is longer; compared with traditional diesel, it can reduce costs by more than 30%.

[0018] 3. In the field of clean coal utilization, this process integrates coal-to-methanol and methanol-to-polyoxymethylene dimethyl ether (DMM3-8) to synthesize clean, environmentally friendly ether / coal-based diesel through thermal blending. This achieves an integrated industrial chain and creates a new, high-value-added production process for the industrialized development of clean coal utilization. As a clean energy source, this invention offers strong compatibility and can replace not only traditional energy sources such as coal and oil, but also all diesel grades. Using DMM3-8 as the mother liquor, the clean, environmentally friendly ether / coal-based diesel produced through the thermal blending process has a shelf life of over five years. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0021] Figure 1 It represents one of the test reports of the ether / coal-based diesel described in the present invention.

[0022] Figure 2 Another test report of the ether / coal-based diesel described in the present invention is shown.

[0023] Figure 3 express Figure 2 Other pages of the test report shown.

[0024] Figure 4 The diagram is a schematic structural diagram of the ether / coal-based diesel production system of the present invention. Some additive tanks are not shown in the diagram. DETAILED DESCRIPTION

[0025] In order to more clearly understand the above-mentioned objectives, features and advantages of the present invention, the scheme of the present invention will be further described below. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0026] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present invention, rather than all the embodiments.

[0027] The present invention provides a specific embodiment of a process for producing ether / coal-based diesel by thermally adjusting the polymer material DMM3-8. After the polyoxymethylene dimethyl ether DMM3-8 is heated or cooled to above 200°C, an auxiliary agent is added, and the mixture is kept warm and thermally adjusted, cyclically stirred, and physicochemically transformed to produce clean and environmentally friendly ether / coal-based diesel.

[0028] As a further improvement of the process technology scheme of the present invention, the auxiliary agents include energy-saving and efficiency-enhancing combustion aids, medium-temperature coal tar, Fischer-Tropsch wax, anthracene oil, light diesel, castor oil, high-carbon fatty alcohols, diisoamyl oxalate, and vinyl acetate.

[0029] As a further improvement to the process technology solution of the present invention, the heat preparation cycle is stirred for at least 2 hours.

[0030] As a further improvement to the process technology solution of the present invention, the temperature of the heat adjustment circulation stirring materialization is at least 220°C.

[0031] As a further improvement to the process technology solution of the present invention, the temperature of the heat adjustment circulation stirring materialization is at least 240°C.

[0032] As a further improvement to the process technology solution of the present invention, the temperature of the heat adjustment circulation stirring materialization is at least 260°C.

[0033] As a further improvement to the process technology solution of the present invention, the temperature of the heat adjustment circulation stirring materialization is at least 280°C.

[0034] As a further improvement of the process technology scheme of the present invention, the step of adding additives is carried out in two steps. In the first step, energy-saving and efficiency-enhancing combustion aid, Fischer-Tropsch wax, anthracene oil, light diesel, and medium-temperature coal tar are added to polymethoxydimethyl ether DMM3-8 and mixed. After physicochemical reaction for 1 hour, hydrocarbons are formed; in the second step, castor oil, high-carbon fatty alcohols, diisoamyl oxalate, and vinyl acetate are added to a hot mixing tank in sequence and stirred evenly. After physicochemical reaction for 2 hours, clean and environmentally friendly ether / coal-based diesel is formed.

[0035] In the second aspect, the present invention provides a polymer material DMM3-8 thermal blending and synthesis ether / coal-based diesel production system, comprising at least one DMM3-8 raw material tank, at least one blending tank, at least one auxiliary agent tank, and at least one ether / coal-based diesel finished product tank. Each DMM3-8 raw material tank and auxiliary agent tank is connected to at least one blending tank through a pipeline, and all blending tanks are connected to each other through pipelines.

[0036] like Figure 4As shown, the present invention provides a specific embodiment of a system for synthesizing ether / coal-based diesel by thermally adjusting the polymer material DMM3-8, comprising a DMM3-8 raw material tank, two blending tanks, nine auxiliary agent tanks, and three ether / coal-based diesel finished product tanks. Each DMM3-8 raw material tank and auxiliary agent tank is connected to the two blending tanks via a pipeline, all the blending tanks are connected to each other via a pipeline, and each blending tank is connected to the three ether / coal-based diesel finished product tanks via a pipeline.

[0037] The specific embodiments of the present invention are described in detail below.

[0038] Example 1 (0 # Ether-based diesel) With polyoxymethylene dimethyl ether DMM3-8 as the main material, when the temperature of polyoxymethylene dimethyl ether DMM3-8 is at 280℃, energy-saving and efficiency-enhancing combustion aid (patent number: ZL201510466058.X), medium-temperature coal tar, Fischer-Tropsch wax, anthracene oil, light diesel, castor oil, high-carbon fatty alcohol, diisoamyl oxalate, and vinyl acetate are added, and hot mixing, circulation stirring and physicalization are carried out to produce ether / coal-based diesel.

[0039] Among them: polyoxyethylene dimethyl ether DMM3-8 37%, energy-saving and efficiency-enhancing combustion aid 5%, medium-temperature coal tar 7%, Fischer-Tropsch wax 11%, anthracene oil 7%, light diesel 11%, castor oil 5%, high-carbon fatty alcohol 5%, diisoamyl oxalate 7%, and vinyl acetate 5%.

[0040] like Figure 4 As shown, in the DMMn production area, methanol is processed to obtain polyoxymethylene dimethyl ether DMM3-8, which is transported to the DMM3-8 raw material tank. The high-temperature polyoxymethylene dimethyl ether DMM3-8 (DMM3-8) is transported to the No. 1 blending tank and the No. 2 blending tank respectively. Energy-saving and efficiency-enhancing combustion aid (patent number: ZL201510466058.X), medium-temperature coal tar, Fischer-Tropsch wax, anthracene oil, light diesel, castor oil, high-carbon fatty alcohol, diisoamyl oxalate, vinyl acetate The additives are added to blending tanks No. 1 and No. 2 via their respective additive tanks. The additives are added as follows: First, energy-saving and efficiency-enhancing combustion aid, Fischer-Tropsch wax, anthracene oil, light diesel, and medium-temperature coal tar are added to polyoxyethylene dimethyl ether (DMM3-8) and mixed for one hour to form hydrocarbons. Second, castor oil, high-carbon fatty alcohols, diisoamyl oxalate, and vinyl acetate are added sequentially to the hot blending tank, stirred evenly, and then physicochemically reacted for two hours to form clean, environmentally friendly ether / coal-based diesel. During the physicochemical reaction, a stirring and physicochemical cycle is maintained between blending tanks No. 1 and No. 2 to produce the corresponding clean, environmentally friendly ether / coal-based diesel, which is then transported to the ether / coal-based diesel product tank. Example 2 (-10# ether-based diesel)

[0041] With polyoxymethylene dimethyl ether DMM3-8 (DMM3-8) as the main raw material, when the temperature of polyoxymethylene dimethyl ether DMM3-8 (DMM3-8) is at 280°C, energy-saving and efficiency-enhancing combustion aid (patent number: ZL201510466058.X), medium-temperature coal tar, Fischer-Tropsch wax, anthracene oil, light diesel, castor oil, high-carbon fatty alcohol, diisoamyl oxalate, and vinyl acetate are added. After hot mixing and cyclic stirring for two hours, ether / coal-based diesel is prepared.

[0042] The mixture comprises: 35% polyoxyethylene dimethyl ether (DMM3-8), 5% energy-saving and efficiency-enhancing combustion improver, 8% medium-temperature coal tar, 10% Fischer-Tropsch wax, 6% anthracene oil, 13% light diesel oil, 4.5% castor oil, 5.5% high-carbon fatty alcohol, 5.5% diisoamyl oxalate, and 4.5% vinyl acetate. Other ingredients are the same as in Example 1.

[0043] Test Example 1 The ether / coal-based diesel obtained in Example 1 was tested, and the test report is available at Figure 1 、 Figure 2 、 Figure 3 . Figure 1 0 # The test report of ether-based diesel showed a cetane number of 59, a sulfur content of 0.02, and a freezing point of -10°C, which are far below the national standard.

[0044] in Figure 2 and Figure 3 The production time of -10# ether-based diesel is October 2024, and the test report made by Hebei Rundao Testing Technology Service Co., Ltd. is October 25, 2024. After inspection and measurement, the product is qualified and the product quality shelf life has reached 5 years and 5 months.

[0045] Figure 3 Sinopec -10 # Diesel, sampling time is April 11, 2023, analysis time is October 25, 2024. The sample shows stratification and precipitation, so the test is meaningless.

[0046] Said -10 # The main indicators stipulated by the national standard for diesel are: cetane number is above 45, sulfur content is 0.2, and pour point is not higher than -10℃.

[0047] According to national standards, oil products whose measured indicators are within the range of national standards are all qualified products.

[0048] The diesel test reports for Examples 1 and 2 show slight differences in test indicators, which are due to the selection of diesel feedstock. Therefore, the actual test indicators of the two ether-based diesel products differ. Both test results are within the permitted range of national standards and are qualified products.

[0049] Test Example 4 The ether / coal-based diesel prepared in Example 1 of the present invention is compared with the same quality grade of products in European and American countries and national standards:

[0050] Through the comparison of the quality of four major oil products: the comparison between the hot blending process 0# ether-based diesel and the Euro VI, US, and China National VI indicators, the cetane number of the hot blending process 0# ether-based diesel is higher than the Euro VI, US, and China National VI indicators; the sulfur content of the hot blending process 0# ether-based diesel is lower than the Euro VI, US, and China National VI indicators; the quality shelf life of Euro VI, US, and China National VI products is one year, and the quality shelf life of Zhongsheng's hot blending process products is as long as five years.

[0051] The above description is merely a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Although detailed descriptions have been made with reference to the aforementioned embodiments, those skilled in the art should understand that they may still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents; and such modifications or replacements do not deviate from the essence of the corresponding technical solutions within the scope of the technical solutions of the embodiments, and they should all be included in the scope of protection of the claims.

Claims

1. The production process of polymer material DMM3-8 by thermal conditioning to form ether / coal-based diesel, characterized in that: After the temperature of polyoxymethylene dimethyl ether DMM3-8 is raised or lowered to above 200°C, an auxiliary agent is added, and the mixture is kept warm for hot blending, circulating, stirring, and physicalization to obtain clean and environmentally friendly ether / coal-based diesel.

2. The process for producing ether / coal-based diesel by thermally adjusting the polymer material DMM3-8 according to claim 1, characterized in that: The auxiliary agents include energy-saving and efficiency-enhancing combustion improver, medium-temperature coal tar, Fischer-Tropsch wax, anthracene oil, light diesel, castor oil, high-carbon fatty alcohol, diisoamyl oxalate, and vinyl acetate.

3. The process for producing ether / coal-based diesel by thermally adjusting the polymer material DMM3-8 according to claim 1, characterized in that: The heat formulation cycle was stirred for at least 2 hours.

4. The process for producing ether / coal-based diesel by thermally adjusting the polymer material DMM3-8 according to claim 1, characterized in that: The temperature of the heat mixing circulation stirring materialization is at least 220°C.

5. The process for producing ether / coal-based diesel by thermally adjusting the polymer material DMM3-8 according to claim 1, characterized in that: The temperature of the heat mixing circulation stirring materialization is at least 240°C.

6. The process for producing ether / coal-based diesel by thermally adjusting the polymer material DMM3-8 according to claim 1, characterized in that: The temperature of the heat mixing circulation stirring materialization is at least 260°C.

7. The process for producing ether / coal-based diesel by thermally adjusting the polymer material DMM3-8 according to claim 1, characterized in that: The temperature of the heat mixing circulation stirring materialization is at least 280°C.

8. The process for producing ether / coal-based diesel by thermally adjusting the polymer material DMM3-8 according to claim 2, characterized in that: The step of adding the additives is carried out in two steps. In the first step, energy-saving and efficiency-enhancing combustion aid, Fischer-Tropsch wax, anthracene oil, light diesel, and medium-temperature coal tar are added to polyoxyethylene dimethyl ether DMM3-8 and mixed, and hydrocarbons are formed after 1 hour of physical reaction. In the second step, castor oil, high-carbon fatty alcohol, diisoamyl oxalate, and vinyl acetate are added to a hot mixing tank in sequence and stirred evenly, and clean and environmentally friendly ether / coal-based diesel is formed after 2 hours of physical reaction.

9. A polymer material DMM3-8 thermally conditioned ether / coal-based diesel production system, characterized in that: It includes at least one DMM3-8 raw material tank, at least one blending tank, at least one auxiliary agent tank, and at least one ether / coal-based diesel finished product tank. Each DMM3-8 raw material tank and auxiliary agent tank is connected to at least one blending tank through a pipeline, and all blending tanks are connected through pipelines.

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