Circulating gas mixing device
By mixing heated and unheated gas in a gas mixing unit, combined with temperature detection and flow regulation, the stability problem of the thermal circulation gas system was solved, achieving stable heating of the dry distillation furnace and increasing shale oil production.
Patent Information
- Application Number
- CN202520177184.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-03
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-02-03
AI Technical Summary
In the Fushun-style graded retorting process for oil shale, the long-term high-temperature operation of the thermal circulation gas leads to severe coking in the flue, clogging the pipelines, reducing the stability of the thermal circulation gas system and the uniformity of heating in the retort furnace, and affecting shale oil production.
Design a circulating gas mixing device that mixes heated and unheated gas in a gas mixing tank, and uses a temperature detector and an electric regulating valve to regulate the gas flow rate, combined with stirring by a stirring plate, to ensure thorough mixing and temperature control, and stabilize the temperature fluctuation of the hot circulating gas.
It alleviated coking in the hot gas pipeline, stabilized the heating supply of the dry distillation furnace, increased shale oil production and heating capacity, extended the operating cycle of the unit, increased shale oil production by 280 tons/year, and brought economic benefits of 720,700 yuan/year.
Smart Images
Figure CN223915240U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of oil shale graded dry distillation technology, and more specifically, to a circulating gas mixing device. Background Technology
[0002] In the Fushun-style graded shale retorting process, the hot generated gas from the gasification reaction in the gasification section of the retorting furnace and the hot circulating gas from the heating furnace are the two heat sources and heat carriers for shale retorting in the retorting section. The hot circulating gas needs to reach an average temperature of over 850℃ to ensure that it can supply heat to the retorting furnace in the low-temperature section to meet the production requirements of shale retorting. Often, after a period of operation, the prolonged high temperature causes severe coking in the flues, clogging pipelines, reducing the overall circulating gas flow rate, and decreasing the stability of the hot circulating gas system, resulting in uneven heating. Therefore, we propose a circulating gas mixing device. Utility Model Content
[0003] In view of the problems mentioned in the background art, the purpose of this utility model is to provide a circulating gas mixing device.
[0004] To solve the above problems, the present invention adopts the following technical solution:
[0005] A circulating gas mixing device includes a dry distillation furnace, a heating furnace, a gas saturation tower, and a gas exhaust fan. A sixth pipe is fixedly connected to the gas inlet of the dry distillation furnace. A gas mixing tank is fixedly connected to the end of the sixth pipe. A third pipe is fixedly connected to the top of the gas mixing tank. The end of the third pipe is connected to the gas saturation tower. A fourth pipe is fixedly connected to the end of the third pipe. The end of the fourth pipe is connected to the inlet of the heating furnace. A fifth pipe is fixedly connected to the outlet of the heating furnace. The end of the fifth pipe is connected to the inlet of the gas mixing tank. An agitator is installed on the gas mixing tank. A first temperature detector is installed at one end of the third pipe, and a second electric regulating valve is installed at the other end of the third pipe. A first electric regulating valve is installed on the fourth pipe. A level detector is installed on the sixth pipe. A third temperature detector is installed on the sixth pipe, and a second temperature detector is installed on the fifth pipe.
[0006] As a preferred embodiment of this utility model, the stirring mechanism includes a servo motor fixedly installed at the bottom of the gas mixing tank. The output shaft of the servo motor extends into the inner cavity of the gas mixing tank and is fixedly connected to a rotating rod. Multiple stirring plates are fixedly connected to the side of the rotating rod.
[0007] In a preferred embodiment of this utility model, the input end of the gas conveyor is fixedly connected to a first pipe, and the output end of the gas conveyor is fixedly connected to a second pipe, the end of which is connected to the inlet of the gas saturation tower.
[0008] As a preferred embodiment of this utility model, the bottom of the gas mixing tank is fixedly connected with multiple support seats.
[0009] As a preferred embodiment of this utility model, the gas mixing tank is constructed from low-creep clay bricks, lightweight high-alumina bricks, and lightweight clay bricks, and the outer side of the gas mixing tank is coated with an acid-resistant spray coating.
[0010] As a preferred embodiment of this utility model, a distillation furnace water basin is provided at the bottom of the distillation furnace body, and a feed hopper is provided at the top of the distillation furnace body.
[0011] The advantages of this utility model are:
[0012] (1) In this utility model, part of the saturated gas in the gas saturation tower is transported to the gas mixing tank through the third pipeline, and the other part of the gas is introduced into the heating furnace through the fourth pipeline for heating. The heated gas enters the gas mixing tank through the fifth pipeline for mixing. The mixed gas is introduced into the dry distillation furnace body through the sixth pipeline to provide a heat source for shale dry distillation in the dry distillation furnace body. In addition, the temperature of the gas entering the dry distillation furnace body from the sixth pipeline is detected in real time by the third temperature detector in order to control the opening of the first electric regulating valve on the fourth pipeline and the second electric regulating valve on the third pipeline, thereby adjusting the amount of gas entering the heating furnace for heating and the amount of gas directly entering the gas mixing tank for mixing. This achieves the adjustment of the temperature of the mixed gas in the gas mixing tank, stabilizes the temperature fluctuation of the hot circulating gas, alleviates coking in the hot gas pipeline, stabilizes the heating supply of the dry distillation furnace, and achieves stable shale oil production.
[0013] (2) In this utility model, when heated and unheated gas are introduced into the gas mixing tank for mixing, a servo motor drives the rotating rod and stirring plate to rotate. The stirring plate stirs the gas to ensure that the gas is fully mixed and to ensure the accuracy of the gas temperature detection by the subsequent third temperature detector, thereby improving the practicality of the circulating gas mixing device. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0015] Figure 2 This is a cross-sectional schematic diagram of the gas mixing tank of this utility model;
[0016] Figure 3 This is a schematic diagram of the structure of the stirring plate of this utility model.
[0017] Explanation of the labels in the diagram:
[0018] 1. Retort furnace body; 2. Heating furnace; 3. Gas saturation tower; 4. Gas exhaust fan; 5. Sixth pipeline; 6. Gas mixing tank; 7. Fifth pipeline; 8. Third pipeline; 9. Fourth pipeline; 10. First electric regulating valve; 11. Second electric regulating valve; 12. First temperature detector; 13. Second temperature detector; 14. Liquid level detector; 15. Third temperature detector; 16. Stirring mechanism; 17. Servo motor; 18. Rotating rod; 19. Stirring plate; 20. Retort furnace water basin; 21. Feed hopper; 22. First pipeline; 23. Second pipeline; 24. Support base; 25. Low creep clay brick; 26. Lightweight high alumina brick; 27. Lightweight clay brick; 28. Acid-resistant spray coating. Detailed Implementation
[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.
[0020] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0022] Example:
[0023] Please see Figure 1-3A circulating gas mixing device includes a dry distillation furnace body 1, a heating furnace 2, a gas saturation tower 3, and a gas exhaust machine 4. A sixth pipe 5 is fixedly connected to the gas inlet of the dry distillation furnace body 1. A gas mixing tank 6 is fixedly connected to the end of the sixth pipe 5. A third pipe 8 is fixedly connected to the top of the gas mixing tank 6. The end of the third pipe 8 is connected to the gas saturation tower 3. A fourth pipe 9 is fixedly connected to the end of the third pipe 8. The end of the fourth pipe 9 is connected to the inlet of the heating furnace 2. A fifth pipe 7 is fixedly connected to the outlet of the heating furnace 2. The end of the fifth pipe 7 is connected to the inlet of the gas mixing tank 6. An agitator 16 is provided on the gas mixing tank 6. A first temperature detector 12 is provided at one end of the third pipe 8. A second electric regulating valve 11 is provided at the other end of the third pipe 8. A first electric regulating valve 10 is provided on the fourth pipe 9. A liquid level detector 14 is provided on the sixth pipe 5. A third temperature detector 15 is provided on the sixth pipe 5. A second temperature detector 13 is provided on the fifth pipe 7.
[0024] For details, please refer to Figure 1 and Figure 2 The stirring mechanism 16 includes a servo motor 17 fixedly installed at the bottom of the gas mixing tank 6. The output shaft of the servo motor 17 extends into the inner cavity of the gas mixing tank 6 and is fixedly connected to a rotating rod 18. Multiple stirring plates 19 are fixedly connected to the side of the rotating rod 18.
[0025] In this embodiment, the servo motor 17 drives the rotating rod 18 and the stirring plate 19 to rotate, and the stirring plate 19 stirs and mixes the gas entering the gas mixing tank 6.
[0026] For details, please refer to Figure 1 The gas conveyor 4 has a first pipe 22 fixedly connected to its input end and a second pipe 23 fixedly connected to its output end. The end of the second pipe 23 is connected to the inlet of the gas saturation tower 3.
[0027] In this embodiment, the end of the first pipe 22 is connected to the gas supply point, and the gas is introduced from the first pipe 22 and the second pipe 23 into the gas saturation tower 3 by the gas conveyor 4.
[0028] For details, please refer to Figure 1 The bottom of the gas mixing tank 6 is fixedly connected with multiple support bases 24.
[0029] In this embodiment, the gas mixing tank 6 is supported by the support base 24.
[0030] For details, please refer to Figure 2 and Figure 3The gas mixing tank 6 is constructed from low-creep clay bricks 25, lightweight high-alumina bricks 26 and lightweight clay bricks 27, and the outside of the gas mixing tank 6 is coated with acid-resistant spray paint 28.
[0031] For details, please refer to Figure 1 The bottom of the dry distillation furnace body 1 is provided with a dry distillation furnace water basin 20, and the top of the dry distillation furnace body 1 is provided with a feed hopper 21.
[0032] In this embodiment, the shale slag is cooled by the water basin 20 of the dry distillation furnace, and the finished shale is put into the dry distillation furnace body 1 through the feed hopper 21.
[0033] Working principle: In operation, the gas conveyor 4 is first started to introduce gas from the first pipe 22 and the second pipe 23 into the gas saturation tower 3. The cold circulating gas is saturated in the gas saturation tower 3. Part of the saturated gas is then transported to the gas mixing tank 6 through the third pipe 8, while the other part is introduced into the heating furnace 2 through the fourth pipe 9. The heating furnace 2 heats the gas, and the heated gas enters the gas mixing tank 6 through the fifth pipe 7, allowing the heated and unheated gas to mix. Simultaneously, the servo motor 17 is started to drive the rotating rod 18 and the stirring plate 19 to rotate. The stirring plate 19 agitates the gas entering the gas mixing tank 6, ensuring... To ensure the quality of gas mixing, the mixed gas is introduced into the pyrolysis furnace 1 through the sixth pipe 5, providing a heat source for shale pyrolysis in the pyrolysis furnace 1. In addition, the temperature of the gas entering the pyrolysis furnace 1 from the sixth pipe 5 is monitored in real time using the third temperature detector 15. At the same time, the opening of the first electric regulating valve 10 on the fourth pipe 9 and the second electric regulating valve 11 on the third pipe 8 are controlled to regulate the amount of gas entering the heating furnace 2 for heating and the amount of gas directly entering the gas mixing tank 6 for mixing. This allows for the regulation of the temperature of the mixed gas in the gas mixing tank 6, stabilizing the temperature fluctuation of the hot circulating gas, alleviating coking in the hot gas pipeline, stabilizing the heating supply of the pyrolysis furnace, and achieving stable shale oil production.
[0034] Through the modification of the gas mixing system, the high temperature of the gas mixing tank 6 can be stably controlled according to production conditions, and the outlet temperature of the manifold decreases steadily. After the modification, the maximum flow rate of cold gas increased from 14,000 m³ / h. 3 / h increased to 31000m 3 / h, minimum flow rate from 2000m 3 / h increased to 5000m 3The system reduces the maximum temperature of circulating gas entering the pyrolysis furnace 1 to below 820℃, alleviating coking and blockage in the fire channel and extending the operating cycle of the staged pyrolysis unit. Automatic regulation of the gas flow rate via the first electric regulating valve 10 and the second electric regulating valve 11 ensures that the temperature difference between the high and low temperatures of the circulating gas entering the pyrolysis furnace 1 is within 200℃, which is beneficial for the stability of the fire layer in the pyrolysis furnace 1, increasing shale oil production, improving the heating capacity and pyrolysis efficiency of the pyrolysis furnace 1, and maximizing the release of hydrocarbons from the oil shale. Calculations show that the unit can increase daily production by 0.8 tons, and based on 350 operating days per year, this translates to an annual increase of 280 tons of shale oil production, generating a profit of 720,700 yuan.
[0035] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model based on the technical solution and its improved concept should be covered within the protection scope of the present utility model.
Claims
1. A circulating gas mixing device, comprising a dry distillation furnace (1), a heating furnace (2), a gas saturation tower (3), and a gas exhaust fan (4), characterized in that: The air inlet of the dry distillation furnace body (1) is fixedly connected to a sixth pipe (5), the end of the sixth pipe (5) is fixedly connected to a gas mixing tank (6), the top of the gas mixing tank (6) is fixedly connected to a third pipe (8), the end of the third pipe (8) is connected to a gas saturation tower (3), the end of the third pipe (8) is fixedly connected to a fourth pipe (9), the end of the fourth pipe (9) is connected to the inlet of the heating furnace (2), the outlet of the heating furnace (2) is fixedly connected to a fifth pipe (7), the end of the fifth pipe (7) is... The gas mixing tank (6) is connected to the inlet of the gas mixing tank (6), which is equipped with an agitator (16). One end of the third pipe (8) is equipped with a first temperature detector (12), and the other end of the third pipe (8) is equipped with a second electric regulating valve (11). The fourth pipe (9) is equipped with a first electric regulating valve (10). The sixth pipe (5) is equipped with a liquid level detector (14), and the sixth pipe (5) is equipped with a third temperature detector (15). The fifth pipe (7) is equipped with a second temperature detector (13).
2. The circulating gas mixing device according to claim 1, characterized in that: The stirring mechanism (16) includes a servo motor (17) fixedly installed at the bottom of the gas mixing tank (6). The output shaft of the servo motor (17) extends into the inner cavity of the gas mixing tank (6) and is fixedly connected to a rotating rod (18). Multiple stirring plates (19) are fixedly connected to the side of the rotating rod (18).
3. The circulating gas mixing device according to claim 1, characterized in that: The gas pump (4) has a first pipe (22) fixedly connected to its input end and a second pipe (23) fixedly connected to its output end. The end of the second pipe (23) is connected to the input port of the gas saturation tower (3).
4. A circulating gas mixing device according to claim 1, characterized in that: The bottom of the gas mixing tank (6) is fixedly connected to multiple support bases (24).
5. A circulating gas mixing device according to claim 1, characterized in that: The gas mixing tank (6) is constructed of low-creep clay bricks (25), lightweight high-alumina bricks (26) and lightweight clay bricks (27), and the outside of the gas mixing tank (6) is coated with acid-resistant spray paint (28).
6. A circulating gas mixing device according to claim 1, characterized in that: The bottom of the dry distillation furnace body (1) is provided with a dry distillation furnace water basin (20), and the top of the dry distillation furnace body (1) is provided with a feed hopper (21).