A coupled process system and method for producing semi-coke using oil, gas, coke, and electricity

Abstract

The present invention relates to the technical field of coal pyrolysis and semi-coke production, and specifically to an oil-gas-coke-electricity cogeneration coupled process system and process method for producing semi-coke. The process system includes a dry distillation device, a gas purification device, a boiler device, a steam turbine generator, a red coke sorting device, and a steam quenching device; the red coke outlet of the dry distillation device is connected to the red coke sorting device; the large-particle red coke outlet of the red coke sorting device is connected to the steam quenching device, and the steam exhaust outlet of the steam turbine generator is connected to the steam quenching device, so that the large-particle red coke is steam-quenched using the steam exhaust, and the generated coal gas is used as a heat carrier for the boiler device; the powdered red coke outlet of the red coke sorting device is connected to the boiler device, and the generated coal gas outlet of the steam quenching device is connected to the boiler device; the steam outlet of the boiler device is connected to the steam turbine generator. The present invention can solve the problems of high water consumption and serious pollution caused by traditional wet quenching processes, as well as the low quality of the semi-coke produced and the waste of sensible heat resources.

Description

Technical Field

[0001] The present invention relates to the technical field of coal pyrolysis and blue coke production, and in particular to an oil-gas-coke-electricity cogeneration coupling process system and a process method for producing blue coke. Background Art

[0002] As an important solid carbon product, semi-coke is widely used in metallurgy, chemical industry and civil fuel due to its low cost, high fixed carbon content and good chemical activity.

[0003] Currently, the traditional lignite production process primarily involves drying, dry distilling, and cooling quenching raw coal in a carbonization furnace. The heat used for dry distillation primarily comes from the combustion of recycled coal gas mixed with air, which drives the distillation temperature to approximately 650°C to 950°C. Cooling quenching, on the other hand, often utilizes wet quenching. However, this wet quenching method not only consumes significant amounts of water, increasing production costs, but also produces sulfur- and dust-laden exhaust gases, significantly polluting the environment. Furthermore, the quality of the lignite produced cannot be guaranteed. The mixing of coke dust with large-particle lignite reduces the overall quality of the lignite. Furthermore, the lignite has a high moisture content of approximately 20%, resulting in low-quality lignite. If low-moisture, large-particle lignite is required later, additional drying and screening equipment will be required, extending the process and increasing equipment and personnel investment. Furthermore, the sensible heat generated by dry distillation during lignite production is not recycled, resulting in a waste of sensible heat resources. Summary of the Invention

[0004] In order to solve the problems of large water consumption, serious pollution, low quality of semi-coke and waste of sensible heat resources caused by the traditional wet quenching process, the present invention provides an oil-gas-coke-electricity cogeneration coupling process system and process method for producing semi-coke.

[0005] To achieve the above objectives, the technical solutions of the present invention are as follows.

[0006] The first aspect of the present invention provides an oil-gas-coke-electricity cogeneration coupling process system for producing lignite, comprising a dry distillation device, a boiler device, a steam turbine generator, a red coke sorting device and a steam quenching device; wherein the red coke outlet of the dry distillation device is connected to the red coke sorting device to separate large-particle red coke and powdered red coke; the large-particle red coke outlet of the red coke sorting device is connected to the steam quenching device, and the steam exhaust outlet of the steam turbine generator is connected to the steam quenching device to utilize the steam exhaust to steam quench the large-particle red coke, and the generated coal gas is used as the heat carrier of the boiler device; the powdered red coke outlet of the red coke sorting device is connected to the boiler device, and the generated coal gas outlet of the steam quenching device is connected to the boiler device; the steam outlet of the boiler device is connected to the steam inlet of the steam turbine generator, and the steam drives the steam turbine generator to generate electricity.

[0007] The present invention installs a red coke sorting device between the dry distillation unit and the steam quenching unit. The red coke sorting device performs high-temperature sorting on the red coke produced by the dry distillation unit to separate large-particle red coke from powdered red coke, thereby improving the quality and stability of large-particle semi-coke. This invention not only fully utilizes the sensible heat of the red coke to generate electricity, but also utilizes the exhaust steam generated by power generation to steam quench the separated large-particle red coke, thereby improving the quality of the produced large-particle semi-coke and reducing its moisture content.

[0008] Preferably, the red coke sorting device includes a sorting device body and a ceramic screen, the ceramic screen is assembled in the sorting device body, and the large-particle red coke outlet of the red coke sorting device is arranged on the upper side of one end of the ceramic screen.

[0009] Preferably, the ceramic screen is made of a material that can withstand temperatures between 1200°C and 1500°C. For example, Jiangxi Hanming's honeycomb ceramic plate can be used. The present invention utilizes a ceramic screen material that can withstand temperatures between 1200°C and 1500°C, enabling high-temperature separation of red coke while also avoiding waste of sensible heat resources.

[0010] Preferably, the ceramic screen is tilted at an angle of 0° to 30° from the horizontal. Adjusting the tilt of the ceramic screen from the horizontal allows for rapid separation and discharge of large-sized red coke particles. The large-sized red coke particles have a particle size of 8 mm to 12 mm.

[0011] Preferably, it also includes a gas purification device, and the distillation device is provided with a raw coal inlet, a clean coal gas inlet, a raw coal gas outlet and a red coke outlet, and the raw coal gas outlet is connected to the gas purification device to separate coal tar and clean coal gas; the clean coal gas outlet of the gas purification device is connected to the clean coal gas inlet of the distillation device.

[0012] A second aspect of the present invention provides an oil-gas-coke-electricity cogeneration coupled process method for producing semi-coke, which is carried out using the oil-gas-coke-electricity cogeneration coupled process system for producing semi-coke described in the first aspect and comprises the following steps:

[0013] The raw coal is fed into the dry distillation device for pyrolysis, and the pyrolysis produces red coke and raw coal gas; the red coke produced by pyrolysis is fed into the red coke sorting device through the red coke outlet of the dry distillation device, and is separated in the red coke sorting device; the separated large-particle red coke is fed into the steam quenching device through the large-particle red coke outlet of the red coke sorting device; the steam exhaust gas discharged from the steam exhaust outlet of the steam turbine generator is fed into the steam quenching device, and the large-particle red coke is steam quenched by the steam exhaust gas, and a water-gas reaction occurs to produce large-particle blue coke and generated coal gas; the separated powdered red coke is fed into the boiler device through the powdered red coke outlet of the red coke sorting device, and the generated coal gas is fed into the boiler device through the generated coal gas outlet of the steam quenching device, and the generated coal gas is mixed with the powdered red coke in the boiler device and then burned as a heat carrier for the boiler device; the steam generated by the boiler device is fed into the steam inlet of the steam turbine generator through the steam outlet of the boiler device, and the steam drives the steam turbine generator to generate electricity.

[0014] Preferably, the temperature of the large-size red coke fed to the steam quenching device is 500°C to 850°C, and the temperature of the exhaust steam fed to the steam quenching device is 100°C to 200°C. In a steam turbine generator, the exhaust steam temperature is maintained between 100°C and 200°C, a temperature range that ensures normal operation, power generation efficiency, and safety of the turbine.

[0015] Preferably, the large-particle size semi-coke has a particle size of 8 mm to 12 mm and a moisture content of less than 5%. Further preferably, the large-particle size semi-coke has a moisture content of less than 3%.

[0016] Preferably, the raw gas generated by pyrolysis enters the gas purification device through the raw gas outlet of the distillation device, and coal tar and clean gas are separated in the gas purification device; the separated clean gas is sent to the clean gas inlet of the distillation device through the clean gas outlet of the gas purification device for combustion, and serves as the heat carrier of the distillation device.

[0017] Preferably, the raw coal is low-rank coal.

[0018] Beneficial effects of the present invention:

[0019] 1. The present invention sets a red coke sorting device between the dry distillation device and the steam quenching device, which can not only fully utilize the sensible heat of the red coke to generate electricity, but also use the exhaust steam generated by power generation to steam quench the separated large-particle red coke, thereby improving the quality of the produced large-particle semi-coke and reducing the moisture content of the large-particle semi-coke.

[0020] 2. The present invention uses a red coke sorting device to perform high-temperature sorting on the red coke produced by the dry distillation unit to separate large-particle red coke from powdered red coke, thereby improving the quality and stability of the large-particle blue coke. The large-particle blue coke produced by the present invention has low moisture content, large particle size, and good air permeability.

[0021] 3. The present invention utilizes the exhaust steam generated by power generation to steam quench the separated large-particle red coke, which not only saves water but also improves the quality of large-particle blue coke.

[0022] 4. The process of the present invention is simple and low in cost. It not only eliminates the screening and drying processes in the traditional semi-coke process, reduces equipment and personnel investment, but also avoids the pollution to the atmosphere caused by the wet quenching process. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of an oil-gas-coke-electricity cogeneration coupled process system for producing blue coke provided in an embodiment of the present invention.

[0024] Figure 2 This is a structural diagram of the red coke sorting device.

[0025] Figure 3 Schematic diagram of the structure of the ceramic screen and the screen frame used to install the ceramic screen in the red coke separation device. (a) is the structural diagram of the screen frame; (b) is the structural diagram of the ceramic screen.

[0026] Description of reference numerals:

[0027] 1. Drying device; 2. Coal gas purification device; 3. Boiler device; 4. Steam turbine generator; 5. Red coke sorting device; 6. Steam coke quenching device; 51. Sorting device body; 52. Ceramic screen; 53. Screen frame; 54. Vibrator; 55. Electric motor; 56. Drive wheel; 57. Shock absorber. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0029] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of the present invention.

[0030] The present invention provides an oil-gas-coke-electricity cogeneration coupling process system and method for producing semi-coke, so as to achieve the effects of energy conservation, emission reduction, quality improvement and efficiency enhancement.

[0031] The technical solution of the present invention is further described below by means of specific examples. In the following examples, the methods described are conventional methods unless otherwise specified; the equipment and materials described are commercially available unless otherwise specified.

[0032] like Figure 1 A coupled process system for the cogeneration of oil, gas, coke and electricity for producing semi-coke comprises a dry distillation device 1, a gas purification device 2, a boiler device 3, a steam turbine generator 4, a red coke sorting device 5 and a steam quenching device 6; wherein, the red coke outlet of the dry distillation device 1 is connected to the red coke sorting device 5 to separate large-particle red coke and powdered red coke; the large-particle red coke outlet of the red coke sorting device 5 is connected to the steam quenching device 6, and the exhaust steam outlet of the steam turbine generator 4 is connected to the steam quenching device 6, so that the large-particle red coke is quenched by the exhaust steam, and the generated coal gas is used as the heat carrier of the boiler device 3; the powdered red coke outlet of the red coke sorting device 5 is connected to the boiler device 3, and the generated coal gas outlet of the steam quenching device 6 is connected to the boiler device 3; the steam outlet of the boiler device 3 is connected to the steam inlet of the steam turbine generator 4, and the steam drives the steam turbine generator 4 to generate electricity.

[0033] The raw coal used in the embodiments of the present invention is primarily low-rank coal, generating economic benefits by effectively utilizing low-cost low-rank coal. Because low-rank coal has a high moisture content, which can reach 15% to 20%, it is typically dried and then fed into the dry distillation device 1 for pyrolysis. During the pyrolysis process, an appropriate amount of clean coal gas and air is introduced into the dry distillation device 1 for combustion, causing the low-rank coal to pyrolyze in the dry distillation device 1, producing red coke and raw coal gas. The clean coal gas introduced into the dry distillation device 1 can be provided by the gas purification device 2.

[0034] The raw coal gas produced by dry distillation unit 1 enters gas purification unit 2 for separation and purification, producing chemical products such as coal tar and clean coal gas. Chemical products such as coal tar can be sold directly or further processed. Clean coal gas can be sold as a product or used to produce chemical products such as methanol and LNG. Liquefied natural gas (LNG) is a clean energy chemical product. A portion of the clean coal gas returns to dry distillation unit 1 through the clean coal gas pipeline for combustion and heating.

[0035] The red coke produced by the dry distillation unit 1 enters the red coke sorting unit 5 for high-temperature sorting, where it is separated into large-particle red coke and fine red coke. The large-particle red coke enters the steam quenching unit 6, while the fine red coke enters the boiler unit 3 for combustion.

[0036] In the steam quenching unit 6, exhaust steam from the steam turbine generator 4 enters the steam quenching unit 6, where it is used to steam quench the large-particle red coke. This reaction triggers a water-gas reaction, producing semi-coke with a moisture content of less than 5% and generated gas. The semi-coke can be sold directly as a product, while the generated gas enters the boiler unit 3.

[0037] Powdered red coke and generated coal gas are mixed and burned in a specific ratio in boiler unit 3, with air serving as a combustion aid. Steam generated by boiler unit 3 is fed through the steam outlet of boiler unit 3 to the steam inlet of steam turbine generator 4, where it drives turbine generator 4 to generate electricity. The steam generated by boiler unit 3 can also be sold directly as a product.

[0038] In this embodiment of the present invention, the steam turbine generator 4 is a device that converts the thermal energy of steam into mechanical energy, and then converts the mechanical energy into electrical energy through a generator. The steam turbine generator 4 comprises a steam turbine and a generator. The steam turbine is the core component of the steam turbine generator, responsible for converting the thermal energy of steam into mechanical energy; the generator converts the mechanical energy of the steam turbine into electrical energy.

[0039] The electricity generated by the steam turbine generator 4 is not only used for its own electricity but also sold directly to the grid. Exhaust steam from the steam turbine generator 4 enters the steam quenching unit 6, where it is used to quench large-particle red coke and participate in the water-gas reaction. In this embodiment of the present invention, the dry distillation unit 1, gas purification unit 2, boiler unit 3, and steam turbine generator 4 all utilize existing structures.

[0040] In this embodiment of the present invention, the steam quenching device 6 includes a quenching chamber with an exhaust steam nozzle fixedly mounted on the top of the quenching chamber. The exhaust steam nozzle is connected to the exhaust steam outlet of the steam turbine generator 4 via an exhaust steam pipeline. The exhaust steam pipeline is equipped with an exhaust steam control valve. One side of the quenching chamber is connected to the large-particle red coke outlet of the red coke sorting device 5, which delivers the sorted large-particle red coke to the quenching chamber.

[0041] The embodiment of the present invention, by providing a red coke sorting device 5 between the dry distillation device 1 and the steam quenching device 6, can not only fully utilize the sensible heat of the red coke to generate electricity, but also utilize the exhaust steam generated by power generation to steam quench the separated large-particle red coke, thereby improving the quality of the produced large-particle blue coke and reducing the moisture content of the large-particle blue coke. The red coke sorting device 5 is used to perform high-temperature sorting on the red coke produced by the dry distillation device 1 to separate large-particle red coke and powdered red coke. The powdered red coke is used to generate electricity, effectively improving the utilization rate of sensible heat. The large-particle red coke produced is then steam quenched to produce large-particle blue coke, which can improve the quality stability of the large-particle blue coke. The prepared large-particle blue coke has low moisture content, large particle size, and good air permeability.

[0042] Compared with the traditional wet quenching process, the embodiment of the present invention utilizes the steam exhaust steam generated by the steam turbine generator 4 to steam quench the large-particle red coke, which not only saves water, but also saves about 0.4 tons to 0.5 tons of water for every ton of raw coal, and also improves the quality of large-particle blue coke.

[0043] Based on the above embodiment, the red coke sorting device 5 includes a sorting device body 51 and a ceramic screen 52. The ceramic screen 52 is assembled within the sorting device body 51. The large-diameter red coke outlet of the red coke sorting device 5 is located above one end of the ceramic screen 52. The material selected for the red coke sorting device 5 can withstand the heat of the red coke.

[0044] Based on the above embodiment, the ceramic screen 52 is made of a ceramic material that can withstand temperatures of 1200° C. to 1500° C. For example, the ceramic screen 52 can be made of Jiangxi Hanming's honeycomb ceramic plate, which has a compressive strength of 1.5 MPa, an operating temperature of ≤1550° C., and is made of alumina and zirconia.

[0045] Based on the above embodiment, the ceramic screen 52 is tilted at an angle of 0° to 30° from the horizontal plane. Preferably, the ceramic screen 52 is tiltedly installed in the separation device body 51 to facilitate rapid separation of large-sized red coke and discharge of the large-sized red coke.

[0046] In the embodiment of the present invention, Figure 2 and Figure 3 The red coke sorting device 5 includes a vibrating screen, which adopts the existing single-axis vibrating screen. The vibrating screen is installed in the sorting device body 51. The vibrating screen includes a screen frame 53, a ceramic screen 52, an exciter 54, a motor 55, a transmission wheel 56 and a shock absorber 57, wherein the ceramic screen 52 is fixedly mounted on the screen frame 53 and supported by the screen frame 53. The exciter 54 is fixed to the side plate of the screen frame 53 through a flange, and transmits the centrifugal force to the screen frame 53. The transmission wheel 56 is installed on the rotating shaft of the motor 55 and the eccentric shaft of the exciter 54, and transmits the torque through the V-belt to realize the power transmission from the motor 55 to the exciter 54. The shock absorber 54 is installed on the side wall of the sorting device body 51 to support the sorting device body 51 and isolate the transmission of vibration to the ground.

[0047] The working principle of the vibrating screen is as follows:

[0048] The motor is started, rotating the vibrator's eccentric shaft via a V-belt. The vibrator's eccentric counterweight generates periodic centrifugal force, the direction of which changes as the eccentric shaft rotates. This centrifugal force creates a rotational vector on the screen box, driving the screen frame to vibrate. After the red coke enters the separation device, it vibrates on the ceramic screen and is separated through the meshes. The residue that falls through the screen is powdered red coke.

[0049] On the basis of the above embodiment, the dry distillation device 1 is provided with a raw coal inlet, a clean coal gas inlet, a raw coal gas outlet and a red coke outlet. The raw coal gas outlet is connected to the gas purification device 2 to separate coal tar and clean coal gas; the clean coal gas outlet of the gas purification device 2 is connected to the clean coal gas inlet of the dry distillation device 1.

[0050] A method for producing semi-coke by coupling oil, gas, coke and electricity, using the above-mentioned method, comprising the following steps:

[0051] In step 1, raw coal is fed into a dry distillation unit 1 for pyrolysis, producing red coke and raw coal gas. The red coke produced by pyrolysis is fed through the red coke outlet of the dry distillation unit 1 to a red coke separation unit 5 for separation. The raw coal gas produced by pyrolysis enters a gas purification unit 2 through the raw coal gas outlet of the dry distillation unit 1, where coal tar and clean coal gas are separated. The separated clean coal gas is fed through the clean coal gas outlet of the gas purification unit 2 to the clean coal gas inlet of the dry distillation unit 1 for combustion, serving as a heat carrier for the dry distillation unit 1. The raw coal is low-rank coal.

[0052] In step 2, the separated large-particle red coke is fed to a steam quenching unit 6 via the large-particle red coke outlet of the red coke sorting unit 5. Exhaust steam from the exhaust steam outlet of the steam turbine generator 4 is fed to the steam quenching unit 6, where it is used to quench the large-particle red coke, triggering a water-gas reaction to produce large-particle blue coke and generated gas. The temperature of the large-particle red coke fed to the steam quenching unit 6 is 500°C to 850°C; the temperature of the exhaust steam fed to the steam quenching unit 6 is 100°C to 200°C, preferably 150°C. The large-particle blue coke has a particle size of 8mm to 12mm and a moisture content of less than 5%.

[0053] Table 1 Performance indicators of large particle size semi-coke

[0054]

[0055] Note: The performance index testing of large-particle semi-coke is carried out with reference to the industry standard GB / T 25211-2023 "Classification and Quality Requirements of Semi-coke Products".

[0056] In step 3, the separated powdered red coke is fed into the boiler device 3 through the powdered red coke outlet of the red coke sorting device 5, and the generated gas is fed into the boiler device 3 through the generated gas outlet of the steam quenching device 6. The generated gas and the powdered red coke are mixed and burned in the boiler device 3 to serve as the heat carrier of the boiler device 3; the steam generated by the boiler device 3 is fed into the steam turbine generator 4 through the steam outlet of the boiler device 3 to generate electricity.

[0057] Taking Xinjiang long flame coal as raw coal, the oil, gas, coke and electricity cogeneration coupling process method for producing blue coke provided by the embodiment of the present invention is specifically illustrated.

[0058] Example 1

[0059] Xinjiang long flame coal is used as raw coal, and the oil, gas, coke and power cogeneration coupling process method for producing semi-coke provided in the above-mentioned embodiment of the present invention is referred to. Among them, a 200MW power generation unit is coupled, and 50% of large-particle semi-coke is screened out during the production process and sold as a product. For raw coal, 700,800 tons of standard coal are processed annually, which is equivalent to 981,120 tons of low-rank coal with a calorific value of 5000kcal / kg. The specific process parameters are as follows: the distillation temperature in the distillation device is 650℃~850℃, the residence time is 9 hours, the return ratio of clean coal gas is 50%; 50% of large-particle red coke is screened out during the production process.

[0060] Comparative Example 1

[0061] Xinjiang long flame coal is used as raw coal, which is directly fed into the boiler device for combustion. The steam outlet of the boiler device is connected to the steam turbine generator for power generation.

[0062] The products and output values ​​of Example 1 and Comparative Example 1 were analyzed as follows:

[0063] The yield of large-size semi-coke in Example 1 was 40.71%, and a total of 399,412 tons of large-size semi-coke was produced. After separation in the red coke sorting device, large-size red coke accounted for 50%, or about 199,706 tons; and powdered red coke accounted for 50%, or about 199,706 tons.

[0064] The power generation value of the red coke powder separated in Example 1: The calorific value of the red coke powder was 6500 kcal / kg, and the power generation value of the red coke powder was 83,448,578 yuan. In Comparative Example 1, the calorific value of standard coal was 7000 kcal / kg; each ton of standard coal generated 2500 kWh of electricity, with a price of 0.18 yuan per kWh. The standard coal used was Xinjiang long flame coal.

[0065] The sensible heat power generation value of the powdered red coke separated in Example 1 is: the sensible heat power generation of each ton of powdered red coke is 100 kWh, and the price per kWh is 0.18 yuan, so the sensible heat power generation value of the powdered red coke is 3,594,708 yuan.

[0066] The output value of the large-particle-size semi-coke obtained in Example 1 is: the price of each ton of large-particle-size semi-coke is 450 yuan, and the output value of the large-particle-size semi-coke is 89,867,700 yuan.

[0067] The coal tar output value obtained in Example 1: the coal tar yield is 6.56%, the coal tar output is 64,360 tons, the coal tar is priced at RMB 2,500 per ton, and the coal tar output value is RMB 160,903,680.

[0068] The crude benzene output value obtained in Example 1: the crude benzene yield is 1%, the crude benzene output is 9811.2 tons, the crude benzene is priced at RMB 4,000 per ton, and the crude benzene output value is RMB 39,244,800.

[0069] The net gas output value obtained in Example 1: the net gas yield is 26.5%, and the net gas output is 259996 tons, about 5.78×10 8 Nm³, 0.3 yuan per cubic meter of clean gas, and the output value of clean gas is 173,331,200 yuan. After removing 50% of the recycled clean gas, the total output value of the coupled process method of Example 1 is 463,725,066 yuan.

[0070] The single traditional power generation output value of comparative example 1 is: the standard coal volume is 700,800 tons, the power generation per ton of standard coal is 2,500 kWh, the price per kWh is 0.18 yuan, and the single traditional power generation output value is 315,360,000 yuan.

[0071] The output value of the coupled process method of Example 1 is 463,725,066 yuan, which is 47.04% higher than the output value of the single traditional power generation in Comparative Example 1.

[0072] Based on the above analysis, from the perspective of water conservation, the process method of the embodiment of the present invention can save 0.4 to 0.5 tons of quenching water per ton of large-particle red coke. From the perspective of energy recovery, the sensible heat power generation of each ton of powdered red coke is 120 kWh, which fully utilizes the sensible heat of powdered red coke. From an environmental perspective, the process method of the embodiment of the present invention can avoid the pollution to the atmosphere caused by the wet quenching process. From the perspective of product quality, the large-particle blue coke produced by the process method of the embodiment of the present invention has low moisture content, large particle size and good air permeability. From the perspective of the process flow, the process method of the embodiment of the present invention can eliminate the screening and drying processes in the traditional blue coke process, reducing equipment and personnel investment. From an economic perspective, the economic output value generated by the process method of the embodiment of the present invention is more than 45% higher than the economic output value generated by traditional power generation.

[0073] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An oil-gas-coke-electricity cogeneration coupling process system for producing semi-coke, characterized in that: It comprises a dry distillation device (1), a boiler device (3), a steam turbine generator (4), a red coke separation device (5) and a steam coke quenching device (6); wherein, The red coke outlet of the carbonization device (1) is connected to the red coke sorting device (5) to separate large-particle red coke and powdered red coke; the large-particle red coke outlet of the red coke sorting device (5) is connected to the steam quenching device (6), and the exhaust steam outlet of the steam turbine generator (4) is connected to the steam quenching device (6) to utilize the exhaust steam to steam quench the large-particle red coke, and the generated coal gas is used as a heat carrier of the boiler device (3); The powdered red coke outlet of the red coke sorting device (5) is connected to the boiler device (3), and the generated coal gas outlet of the steam quenching device (6) is connected to the boiler device (3); the steam outlet of the boiler device (3) is connected to the steam inlet of the steam turbine generator (4), and the steam drives the steam turbine generator (4) to generate electricity.

2. The oil-gas-coke-electricity cogeneration coupling process system for producing blue coke according to claim 1, characterized in that: The red coke separation device (5) comprises a separation device body (51) and a ceramic screen (52), wherein the ceramic screen (52) is assembled in the separation device body (51), and a large-particle-size red coke outlet of the red coke separation device (5) is arranged on the upper side of one end of the ceramic screen (52).

3. The oil-gas-coke-electricity cogeneration coupling process system for producing blue coke according to claim 2, characterized in that: The material of the ceramic screen (52) is a ceramic material that can withstand temperatures of 1200°C to 1500°C.

4. The oil-gas-coke-electricity cogeneration coupling process system for producing blue coke according to claim 2, characterized in that: The ceramic screen (52) has an inclination angle of 0° to 30° from the horizontal plane.

5. The oil, gas, coke and power cogeneration coupling process system for producing blue coke according to claim 1, characterized in that: It also includes a gas purification device (2), wherein the dry distillation device (1) is provided with a raw coal inlet, a clean coal gas inlet, a raw coal gas outlet, and a red coke outlet, wherein the raw coal gas outlet is connected to the gas purification device (2) to separate coal tar and clean coal gas; and the clean coal gas outlet of the gas purification device (2) is connected to the clean coal gas inlet of the dry distillation device (1).

6. A method for producing oil, gas, coke and electricity cogeneration coupling process for producing blue coke, characterized in that: The oil-gas-coke-electricity cogeneration coupled process system for producing blue carbon according to claim 1 is used, comprising the following steps: The raw coal is fed into the dry distillation device (1) for pyrolysis, and the pyrolysis produces red coke and raw coal gas; the red coke produced by the pyrolysis is fed into the red coke separation device (5) through the red coke outlet of the dry distillation device (1), and is separated in the red coke separation device (5); The separated large-particle red coke is fed into the steam quenching device (6) through the large-particle red coke outlet of the red coke sorting device (5); the exhaust steam discharged from the exhaust steam outlet of the steam turbine generator (4) is fed into the steam quenching device (6), and the exhaust steam is used to steam quench the large-particle red coke, and a water-gas reaction occurs to produce large-particle blue coke and generated gas; The separated powdered red coke is fed into the boiler device (3) through the powdered red coke outlet of the red coke separation device (5), and the generated coal gas is fed into the boiler device (3) through the generated coal gas outlet of the steam quenching device (6). The generated coal gas and the powdered red coke are mixed and burned in the boiler device (3) to serve as the heat carrier of the boiler device (3); the steam generated by the boiler device (3) is fed into the steam inlet of the steam turbine generator (4) through the steam outlet of the boiler device (3), and the steam drives the steam turbine generator (4) to generate electricity.

7. The oil-gas-coke-electricity cogeneration coupling process for producing blue coke according to claim 6, characterized in that: The temperature of the large-size red coke fed into the steam quenching device (6) is 500°C to 850°C; the temperature of the exhaust steam fed into the steam quenching device (6) is 100°C to 200°C.

8. The oil-gas-coke-electricity cogeneration coupling process for producing blue coke according to claim 6, characterized in that: The large-particle size semi-coke has a particle size of 8 mm to 12 mm and a moisture content of less than 5%.

9. The oil-gas-coke-electricity cogeneration coupling process for producing blue coke according to claim 6, characterized in that: The raw coal gas generated by pyrolysis enters the coal gas purification device (2) through the raw coal gas outlet of the carbonization device (1), and coal tar and clean coal gas are separated in the coal gas purification device (2); the separated clean coal gas is sent to the clean coal gas inlet of the carbonization device (1) through the clean coal gas outlet of the coal gas purification device (2) for combustion, and serves as a heat carrier of the carbonization device (1).

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